shithub: riscv

Download patch

ref: bee6271ae1c4f50180f52f6dc11ce23337467722
parent: 319e625be0ec5d78b063308332056bed0299c2c9
author: Ori Bernstein <ori@eigenstate.org>
date: Fri Jan 29 12:34:47 EST 2021

Mail: rewrite.

Acme mail made it hard to do threading, so I wrote a new one.

--- /dev/null
+++ b/sys/man/1/acmemail
@@ -1,0 +1,231 @@
+.TH NAIL 1
+.SH NAME
+Nail \- view mail in acme
+
+.SH SYNOPSIS
+
+Nail
+[
+.B -OsT
+]
+[
+.B -m
+.I maildir
+]
+[
+.B -f
+.I format
+]
+[
+.B -o
+.I outbox
+]
+
+.SH DESCRIPTION
+.PP
+.B Nail
+edits a mailbox in an
+.IR acme (1)
+environment.
+The default mailbox is /mail/fs/mbox.
+Nail shows 3 views:
+The list view, the message view, and the composition view.
+
+.PP
+At startup,
+.B Nail
+takes the following options:
+.PD 0
+.TP
+.B -T
+Disable threading
+.TP
+.B -O
+Disable writing to outbox
+.PD 0
+.TP
+.BI -s
+Accept sendmail plumb messages. By default, only
+the Nail instance viewing /mail/fs/mbox will
+accept plumb messages.
+.PD 0
+.TP
+.BI -m " maildir
+Open the maildir
+.I maildir
+instead of the default
+.PD 0
+.TP
+.BI -f " format
+Define the format of individual messages in the list view
+(see "Format strings" below).
+.TP
+.BI -o " outbox
+Save a copy of outgoing messages to the mailbox
+.IR outbox ,
+instead of discarding them after they're enqueued.
+
+.PP
+Nail presents and acme interface for a upas/fs mailbox.
+When started, a mailbox, by default
+.IR /mail/fs/mbox ,
+is presented.
+In the message list, the tag bar commands typically affect
+the selected messsage.
+In the message and composition views, they typically apply
+to the current message.
+
+.PP
+The following text commands are recognized by the message
+list:
+
+.TP
+.B Put
+Flush pending changes back to
+.IR upasfs (4).
+.PD 0
+.TP
+.B Delmesg, Undelmesg
+Flags a message for deletion on the next
+.I Put
+invocation.
+.PD 0
+.TP
+.B Next
+Select the next unread message in the mailbox.
+.PD 0
+.TP
+.B Mark [±flags]
+Add or remove message flags. The flags recognized
+are listed in
+.IR upasfs (4)
+.PD 0
+.TP
+.B Redraw
+Redraws the contents of the mailbox.
+
+.PP
+The following text commands are recognized by the message
+view:
+
+.TP
+.B Reply [all]
+Replies to a message, quoting it.
+If all is specified, reply to all addresses on the message.
+.PD 0
+.TP
+.B Delmesg, Undelmesg
+As with the message view, but applied to the open message.
+.PD 0
+.TP
+.B Mark
+As with the message view, but applied to the open message.
+
+.PP
+The following text commands are recognized by the composition
+window:
+
+.TP
+.B Post
+Sends the message currently being composed.
+
+.SS Format strings
+The formatting of messages in the list view is controlled by the
+format string defined through the
+.I -f
+flag.
+The format string is composed of multiple directives: plain 
+characters, which are displayed unchanged; indentation directives,
+which allows spacing based on thread depth; and messages directives, 
+which display message fields.
+.PP
+Directives have the following format:
+.IP
+.B "% [flags] [width] verb
+.PP
+.IR width
+limits the number of characters displayed.
+If width is negative, text is aligned right instead of left.
+.PP
+The supported flags are:
+.PD 0
+.TP
+.B >
+Insert indentation into the start of the field. This
+does not increase the width of the field.
+
+.PP
+Messages directives are:
+.PD 0
+.TP
+.B s
+Subject
+.PD 0
+.TP
+.B f
+From field
+.PD 0
+.TP
+.B F
+From field including sender's name
+.PD 0
+.TP
+.B t
+To field
+.PD 0
+.TP
+.B c
+Cc field
+.PD 0
+.TP
+.B r
+Reply-to field
+
+.PP
+Indentation directives are:
+.PD 0
+.TP
+.B i
+Adds spacing depending on message depth in thread but limited to a single level.
+If
+.IR width
+is not specified, adds a tabulation otherwise
+.IR width
+specifies the number of spaces to display.
+.PD 0
+.TP
+.B I
+Similar to
+.IR i
+but not limited to a single level.
+
+.PP
+Two special directives are also available:
+.PD 0
+.TP
+.B "[...]
+Text within the brackets is displayed if the message is not the toplevel message of a thread.
+.PD 0
+.TP
+.B "{...}
+Text within the braces is used as the format string for tmfmt(2).
+
+.PP
+The default format string is "%>48s\\t<%f>"
+
+.SH FILES
+
+.SH "SEE ALSO"
+.IR mail (1),
+.IR aliasmail (8),
+.IR filter (1),
+.IR marshal (1),
+.IR mlmgr (1),
+.IR nedmail (1),
+.IR upasfs (4),
+.IR smtp (8),
+.IR faces (1),
+.IR rewrite (6)
+
+.SH BUGS
+Probably.
--- /dev/null
+++ b/sys/src/cmd/upas/Mail/comp.c
@@ -1,0 +1,290 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <thread.h>
+#include <regexp.h>
+
+#include "mail.h"
+
+typedef struct Fn	Fn;
+
+struct Fn {
+	char *name;
+	void (*fn)(Comp *, char **, int);
+};
+
+void
+execmarshal(void *p)
+{
+	Comp *c;
+	char *av[8];
+	int na;
+
+	c = p;
+	rfork(RFFDG);
+	dup(c->fd[0], 0);
+	close(c->fd[0]);
+	close(c->fd[1]);
+
+	na = 0;
+	av[na++] = "marshal";
+	av[na++] = "-8";
+	if(savebox != nil){
+		av[na++] = "-S";
+		av[na++] = savebox;
+	}
+	if(c->rpath != nil){
+		av[na++] = "-R";
+		av[na++] = c->rpath;
+	}
+	av[na] = nil;
+	assert(na < nelem(av));
+	procexec(c->sync, "/bin/upas/marshal", av);
+}
+
+static void
+postmesg(Comp *c, char **, int nf)
+{
+	char *buf, wpath[64], *path;
+	int n, fd;
+	Mesg *m;
+
+	snprint(wpath, sizeof(wpath), "/mnt/acme/%d/body", c->id);
+	if(nf != 0){
+		fprint(2, "Post: too many args\n");
+		return;
+	}
+	if((fd = open(wpath, OREAD)) == -1){
+		fprint(2, "open body: %r\n");
+		return;
+	}
+	if(pipe(c->fd) == -1)
+		sysfatal("pipe: %r\n");
+
+	c->sync = chancreate(sizeof(ulong), 0);
+	procrfork(execmarshal, c, Stack, RFNOTEG);
+	recvul(c->sync);
+	chanfree(c->sync);
+	close(c->fd[0]);
+
+	/* needed because mail is by default Latin-1 */
+	fprint(c->fd[1], "Content-Type: text/plain; charset=\"UTF-8\"\n");
+	fprint(c->fd[1], "Content-Transfer-Encoding: 8bit\n");
+	buf = emalloc(Bufsz);
+	while((n = read(fd, buf, Bufsz)) > 0)
+		if(write(c->fd[1], buf, n) != n)
+			break;
+	write(c->fd[1], "\n", 1);
+	close(c->fd[1]);
+	close(fd);
+	if(n == -1)
+		return;
+
+	if(fprint(c->ctl, "name %s:Sent\n", c->path) == -1)
+		sysfatal("write ctl: %r");
+	if(c->replyto != nil){
+		if((m = mesglookup(c->rname, c->rdigest)) == nil)
+			return;
+		m->flags |= Fresp;
+		path = estrjoin(mbox.path, "/", m->name, "/flags", nil);
+		if((fd = open(path, OWRITE)) != -1){
+			fprint(fd, "+a");
+			close(fd);
+		}
+		mbredraw(m, 0, 0);
+		free(path);
+	}
+	fprint(c->ctl, "clean\n");
+}
+
+static void
+compquit(Comp *c, char **, int)
+{
+	c->quitting = 1;
+}
+
+static Fn compfn[] = {
+	{"Post", postmesg},
+	{"Del", compquit},
+	{nil},
+};
+
+static void
+compmain(void *cp)
+{
+	char *f[32];
+	int nf;
+	Event ev;
+	Comp *c, **pc;
+	Fn *p;
+
+	c = cp;
+	c->quitting = 0;
+	c->qnext = mbox.opencomp;
+	mbox.opencomp = c;
+	fprint(c->ctl, "clean\n");
+	mbox.nopen++;
+	while(!c->quitting){
+		if(winevent(c, &ev) != 'M')
+			continue;
+		if(strcmp(ev.text, "Del") == 0)
+			break;
+		switch(ev.type){
+		case 'l':
+		case 'L':
+			if(matchmesg(&mbox, ev.text))
+				mesgopen(ev.text, nil);
+			else
+				winreturn(c, &ev);
+			break;
+		case 'x':
+		case 'X':
+			if((nf = tokenize(ev.text, f, nelem(f))) == 0)
+				continue;
+			for(p = compfn; p->fn != nil; p++)
+				if(strcmp(p->name, f[0]) == 0){
+					p->fn(c, &f[1], nf - 1);
+					break;
+				}
+			if(p->fn == nil)
+				winreturn(c, &ev);
+			break;
+		break;
+		}
+	}
+	for(pc = &mbox.opencomp; *pc != nil; pc = &(*pc)->qnext)
+		if(*pc == c){
+			*pc = c->qnext;
+			break;
+		}
+	mbox.nopen--;
+	c->qnext = nil;
+	winclose(c);
+	free(c->replyto);
+	free(c->rname);
+	free(c->rdigest);
+	free(c->rpath);
+	threadexits(nil);
+}
+
+static Biobuf*
+openbody(Mesg *r)
+{
+	Biobuf *f;
+	int q0, q1;
+	char *s;
+
+	assert(r->state & Sopen);
+
+	wingetsel(r, &q0, &q1);
+	if(q1 - q0 != 0){
+		s = smprint("/mnt/acme/%d/xdata", r->id);
+		f = Bopen(s, OREAD);
+		free(s);
+	}else
+		f = mesgopenbody(r);
+	return f;
+}
+
+int
+strpcmp(void *a, void *b)
+{
+	return strcmp(*(char**)a, *(char**)b);
+}
+
+void
+show(Biobuf *fd, char *type, char **addrs, int naddrs)
+{
+	char *sep;
+	int i, w;
+
+	w = 0;
+	sep = "";
+	if(naddrs == 0)
+		return;
+	qsort(addrs, naddrs, sizeof(char*), strpcmp);
+	Bprint(fd, "%s: ", type);
+	for(i = 0; i < naddrs; i++){
+		if(i > 0 && strcmp(addrs[i-1], addrs[i]) == 0)
+			continue;
+		w += Bprint(fd, "%s%s", sep, addrs[i]);
+		sep = ", ";
+		if(w > 50){
+			w = 0;
+			sep = "";
+			Bprint(fd, "\n%s: ", type);
+		}
+	}
+	Bprint(fd, "\n");
+}
+
+void
+respondto(Biobuf *fd, char *to, Mesg *r, int all)
+{
+	char *rpto, **addrs;
+	int n;
+
+	rpto = to;
+	if(r != nil)
+		rpto = (strlen(r->replyto) > 0) ? r->replyto : r->from;
+	if(r == nil || !all){
+		Bprint(fd, "To: %s\n", rpto);
+		return;
+	}
+
+	n = 0;
+	addrs = emalloc(64*sizeof(char*));
+	n += tokenize(to, addrs+n, 64-n);
+	n += tokenize(rpto, addrs+n, 64-n);
+	n += tokenize(r->to, addrs+n, 64-n);
+	show(fd, "To", addrs, n);
+	n = tokenize(r->cc, addrs+n, 64-n);
+	show(fd, "CC", addrs, n);
+	free(addrs);
+}
+
+void
+compose(char *to, Mesg *r, int all)
+{
+	static int ncompose;
+	Biobuf *rfd, *wfd;
+	Comp *c;
+	char *ln;
+
+	c = emalloc(sizeof(Comp));
+	if(r != nil)
+		c->path = esmprint("%s%s%s.%d", mbox.path, r->name, "Reply", ncompose++);
+	else
+		c->path = esmprint("%sCompose.%d", mbox.path, ncompose++);
+	wininit(c, c->path);
+
+	wintagwrite(c, "Post |fmt ");
+	wfd = bwinopen(c, "body", OWRITE);
+	respondto(wfd, to, r, all);
+	if(r == nil)
+		Bprint(wfd, "Subject: ");
+	else{
+		if(r->messageid != nil)
+			c->replyto = estrdup(r->messageid);
+		c->rpath = estrjoin(mbox.path, r->name, nil);
+		c->rname = estrdup(r->name);
+		c->rdigest = estrdup(r->digest);
+		Bprint(wfd, "Subject: ");
+		if(r->subject != nil && cistrncmp(r->subject, "Re", 2) != 0)
+			Bprint(wfd, "Re: ");
+		Bprint(wfd, "%s\n\n", r->subject);
+		Bprint(wfd, "Quoth %s:\n", r->fromcolon);
+		rfd = openbody(r);
+		if(rfd != nil){
+			while((ln = Brdstr(rfd, '\n', 0)) != nil)
+				if(Bprint(wfd, "> %s", ln) == -1)
+					break;
+			Bterm(rfd);
+		}
+		Bterm(wfd);
+	}
+	Bterm(wfd);
+	fprint(c->addr, "$");
+	fprint(c->ctl, "dot=addr");
+	threadcreate(compmain, c, Stack);
+}
--- a/sys/src/cmd/upas/Mail/dat.h
+++ /dev/null
@@ -1,171 +1,0 @@
-typedef struct Event Event;
-typedef struct Exec Exec;
-typedef struct Message Message;
-typedef struct Window Window;
-
-enum
-{
-	STACK		= 8192,
-	EVENTSIZE	= 256,
-	NEVENT		= 5,
-};
-
-struct Event
-{
-	int	c1;
-	int	c2;
-	int	q0;
-	int	q1;
-	int	flag;
-	int	nb;
-	int	nr;
-	char	b[EVENTSIZE*UTFmax+1];
-	Rune	r[EVENTSIZE+1];
-};
-
-struct Window
-{
-	/* file descriptors */
-	int		ctl;
-	int		event;
-	int		addr;
-	int		data;
-	Biobuf	*body;
-
-	/* event input */
-	char		buf[512];
-	char		*bufp;
-	int		nbuf;
-	Event	e[NEVENT];
-
-	int		id;
-	int		open;
-	Channel	*cevent;
-};
-
-struct Message
-{
-	Window	*w;
-	int		ctlfd;
-	char		*name;
-	char		*replyname;
-	char		*replydigest;
-	uchar	opened;
-	uchar	dirty;
-	uchar	isreply;
-	uchar	deleted;
-	uchar	writebackdel;
-	uchar	tagposted;
-	uchar	recursed;
-	uchar	level;
-
-	/* header info */
-	char		*fromcolon;	/* from header file; all rest are from info file */
-	char		*from;
-	char		*to;
-	char		*cc;
-	char		*replyto;
-	char		*date;
-	char		*subject;
-	char		*type;
-	char		*disposition;
-	char		*filename;
-	char		*digest;
-	char		*flags;
-
-	Message	*next;	/* next in this mailbox */
-	Message	*prev;	/* prev in this mailbox */
-	Message	*head;	/* first subpart */
-	Message	*tail;	/* last subpart */
-};
-
-enum
-{
-	NARGS		= 100,
-	NARGCHAR	= 8*1024,
-	EXECSTACK 	= STACK+(NARGS+1)*sizeof(char*)+NARGCHAR
-};
-
-struct Exec
-{
-	char		*prog;
-	char		**argv;
-	int		p[2];	/* p[1] is write to program; p[0] set to prog fd 0*/
-	int		q[2];	/* q[0] is read from program; q[1] set to prog fd 1 */
-	Channel	*sync;
-};
-
-extern	Window*	newwindow(void);
-extern	int		winopenfile(Window*, char*);
-extern	void		winopenbody(Window*, int);
-extern	void		winclosebody(Window*);
-extern	void		wintagwrite(Window*, char*, int);
-extern	void		winname(Window*, char*);
-extern	void		winwriteevent(Window*, Event*);
-extern	void		winread(Window*, uint, uint, char*);
-extern	int		windel(Window*, int);
-extern	void		wingetevent(Window*, Event*);
-extern	void		wineventproc(void*);
-extern	void		winwritebody(Window*, char*, int);
-extern	void		winclean(Window*);
-extern	int		winselect(Window*, char*, int);
-extern	char*	winselection(Window*);
-extern	int		winsetaddr(Window*, char*, int);
-extern	char*	winreadbody(Window*, int*);
-extern	void		windormant(Window*);
-extern	void		winsetdump(Window*, char*, char*);
-
-extern	void		readmbox(Message*, char*, char*);
-extern	void		rewritembox(Window*, Message*);
-
-extern	void		mkreply(Message*, char*, char*, Plumbattr*, char*);
-extern	void		delreply(Message*);
-extern	int		write2(int, int, char*, int, int);
-
-extern	int		mesgadd(Message*, char*, Dir*, char*);
-extern	void		mesgmenu(Window*, Message*);
-extern	void		mesgmenuselect(Window*, Message*);
-extern	void		mesgmenunew(Window*, Message*);
-extern	void		mesgmenureflag(Window*, Message*);
-extern	int		mesgopen(Message*, char*, char*, Message*, int, char*);
-extern	void		mesgctl(void*);
-extern	void		mesgsend(Message*);
-extern	void		mesgdel(Message*, Message*);
-extern	void		mesgmenudel(Window*, Message*, Message*);
-extern	void		mesgmenumark(Window*, char*, char*);
-extern	void		mesgmenumarkdel(Window*, Message*, Message*, int);
-extern	Message*	mesglookup(Message*, char*, char*);
-extern	Message*	mesglookupfile(Message*, char*, char*);
-extern	void		mesgfreeparts(Message*);
-
-extern	char*	readfile(char*, char*, int*);
-extern	char*	readbody(char*, char*, int*);
-extern	void		ctlprint(int, char*, ...);
-extern	void*	emalloc(uint);
-extern	void*	erealloc(void*, uint);
-extern	char*	estrdup(char*);
-extern	char*	estrstrdup(char*, char*);
-extern	char*	egrow(char*, char*, char*);
-extern	char*	eappend(char*, char*, char*);
-extern	void		error(char*, ...);
-extern	int		tokenizec(char*, char**, int, char*);
-extern	void		execproc(void*);
-extern	void		setflags(Message*, char *);
-
-#pragma	varargck	argpos	error	1
-#pragma	varargck	argpos	ctlprint	2
-
-extern	Window	*wbox;
-extern	Message	mbox;
-extern	Message	replies;
-extern	char		*fsname;
-extern	int		plumbsendfd;
-extern	int		plumbseemailfd;
-extern	char		*home;
-extern	char		*outgoing;
-extern	char		*mailboxdir;
-extern	char		*user;
-extern	char		deleted[];
-extern	int		wctlfd;
-extern	int		shortmenu;
-extern	int		altmenu;
--- a/sys/src/cmd/upas/Mail/html.c
+++ /dev/null
@@ -1,74 +1,0 @@
-#include <u.h>
-#include <libc.h>
-#include <bio.h>
-#include <thread.h>
-#include <ctype.h>
-#include <plumb.h>
-#include "dat.h"
-
-
-char*
-formathtml(char *body, int *np)
-{
-	int i, j, p[2], q[2];
-	Exec *e;
-	char buf[1024];
-
-	e = emalloc(sizeof(Exec));
-	if(pipe(p) < 0 || pipe(q) < 0)
-		error("can't create pipe: %r");
-
-	e->p[0] = p[0];
-	e->p[1] = p[1];
-	e->q[0] = q[0];
-	e->q[1] = q[1];
-	e->argv = emalloc(4*sizeof(char*));
-	e->argv[0] = estrdup("htmlfmt");
-	e->argv[1] = estrdup("-a");
-	e->argv[2] = estrdup("-cutf-8");
-	e->argv[3] = nil;
-	e->prog = "/bin/htmlfmt";
-	e->sync = chancreate(sizeof(int), 0);
-	proccreate(execproc, e, EXECSTACK);
-	recvul(e->sync);
-	close(p[0]);
-	close(q[1]);
-
-	if((i=write(p[1], body, *np)) != *np){
-		fprint(2, "Mail: warning: htmlfmt failed: wrote %d of %d: %r\n", i, *np);
-		close(p[1]);
-		close(q[0]);
-		return body;
-	}
-	close(p[1]);
-
-	free(body);
-	body = nil;
-	i = 0;
-	for(;;){
-		j = read(q[0], buf, sizeof buf);
-		if(j <= 0)
-			break;
-		body = realloc(body, i+j+1);
-		if(body == nil)
-			error("realloc failed: %r");
-		memmove(body+i, buf, j);
-		i += j;
-		body[i] = '\0';
-	}
-	close(q[0]);
-
-	*np = i;
-	return body;
-}
-
-char*
-readbody(char *type, char *dir, int *np)
-{
-	char *body;
-	
-	body = readfile(dir, "body", np);
-	if(body != nil && strcmp(type, "text/html") == 0)
-		return formathtml(body, np);
-	return body;
-}
--- a/sys/src/cmd/upas/Mail/mail.c
+++ /dev/null
@@ -1,644 +1,0 @@
-#include <u.h>
-#include <libc.h>
-#include <bio.h>
-#include <thread.h>
-#include <plumb.h>
-#include <ctype.h>
-#include "dat.h"
-
-char	*maildir = "/mail/fs/";			/* mountpoint of mail file system */
-char	*mailtermdir = "/mnt/term/mail/fs/";	/* alternate mountpoint */
-char *mboxname = "mbox";			/* mailboxdir/mboxname is mail spool file */
-char	*mailboxdir = nil;				/* nil == /mail/box/$user */
-char *fsname;						/* filesystem for mailboxdir/mboxname is at maildir/fsname */
-char	*user;
-char	*outgoing;
-
-Window	*wbox;
-Message	mbox;
-Message	replies;
-char		*home;
-int		plumbsendfd;
-int		plumbseemailfd;
-int		plumbshowmailfd;
-int		plumbsendmailfd;
-Channel	*cplumb;
-Channel	*cplumbshow;
-Channel	*cplumbsend;
-int		wctlfd;
-void		mainctl(void*);
-void		plumbproc(void*);
-void		plumbshowproc(void*);
-void		plumbsendproc(void*);
-void		plumbthread(void);
-void		plumbshowthread(void*);
-void		plumbsendthread(void*);
-
-int		shortmenu;
-int		altmenu;
-
-void
-usage(void)
-{
-	fprint(2, "usage: Mail [-sS] [-o outgoing] [mailboxname [directoryname]]\n");
-	threadexitsall("usage");
-}
-
-void
-removeupasfs(void)
-{
-	char buf[256];
-
-	if(strcmp(mboxname, "mbox") == 0)
-		return;
-	snprint(buf, sizeof buf, "close %s", mboxname);
-	write(mbox.ctlfd, buf, strlen(buf));
-}
-
-int
-ismaildir(char *s)
-{
-	char *path;
-	Dir *d;
-	int ret;
-
-	path = smprint("%s%s", maildir, s);
-	d = dirstat(path);
-	free(path);
-	if(d == nil)
-		return 0;
-	ret = d->qid.type & QTDIR;
-	free(d);
-	return ret;
-}
-
-void
-threadmain(int argc, char *argv[])
-{
-	char *s, *name;
-	char err[ERRMAX], *cmd;
-	int i, newdir;
-	Fmt fmt;
-
-	doquote = needsrcquote;
-	quotefmtinstall();
-	tmfmtinstall();
-
-	/* open these early so we won't miss notification of new mail messages while we read mbox */
-	plumbsendfd = plumbopen("send", OWRITE|OCEXEC);
-	plumbseemailfd = plumbopen("seemail", OREAD|OCEXEC);
-	plumbshowmailfd = plumbopen("showmail", OREAD|OCEXEC);
-
-	shortmenu = 0;
-	altmenu = 0;
-	ARGBEGIN{
-	case 's':
-		shortmenu = 1;
-		break;
-	case 'S':
-		shortmenu = 2;
-		break;
-	case 'A':
-		altmenu = 1;
-		break;
-	case 'o':
-		outgoing = EARGF(usage());
-		break;
-	case 'm':
-		smprint(maildir, "%s/", EARGF(usage()));
-		break;
-	default:
-		usage();
-	}ARGEND
-
-	name = "mbox";
-
-	/* bind the terminal /mail/fs directory over the local one */
-	if(access(maildir, 0)<0 && access(mailtermdir, 0)==0)
-		bind(mailtermdir, maildir, MAFTER);
-
-	newdir = 1;
-	if(argc > 0){
-		i = strlen(argv[0]);
-		if(argc>2 || i==0)
-			usage();
-		/* see if the name is that of an existing /mail/fs directory */
-		if(argc==1 && strchr(argv[0], '/')==0 && ismaildir(argv[0])){
-			name = argv[0];
-			mboxname = eappend(estrdup(maildir), "", name);
-			newdir = 0;
-		}else{
-			if(argv[0][i-1] == '/')
-				argv[0][i-1] = '\0';
-			s = strrchr(argv[0], '/');
-			if(s == nil)
-				mboxname = estrdup(argv[0]);
-			else{
-				*s++ = '\0';
-				if(*s == '\0')
-					usage();
-				mailboxdir = argv[0];
-				mboxname = estrdup(s);
-			}
-			if(argc > 1)
-				name = argv[1];
-			else
-				name = mboxname;
-		}
-	}
-
-	user = getenv("user");
-	if(user == nil)
-		user = "none";
-	if(mailboxdir == nil)
-		mailboxdir = estrstrdup("/mail/box/", user);
-	if(outgoing == nil)
-		outgoing = estrstrdup(mailboxdir, "/outgoing");
-
-	s = estrstrdup(maildir, "ctl");
-	mbox.ctlfd = open(s, ORDWR|OCEXEC);
-	if(mbox.ctlfd < 0)
-		error("can't open %s: %r", s);
-
-	fsname = estrdup(name);
-	if(newdir && argc > 0){
-		s = emalloc(5+strlen(mailboxdir)+strlen(mboxname)+strlen(name)+10+1);
-		for(i=0; i<10; i++){
-			sprint(s, "open %s/%s %s", mailboxdir, mboxname, fsname);
-			if(write(mbox.ctlfd, s, strlen(s)) >= 0)
-				break;
-			err[0] = '\0';
-			errstr(err, sizeof err);
-			if(strstr(err, "mbox name in use") == nil)
-				error("can't create directory %s for mail: %s", name, err);
-			free(fsname);
-			fsname = emalloc(strlen(name)+10);
-			sprint(fsname, "%s-%d", name, i);
-		}
-		if(i == 10)
-			error("can't open %s/%s: %r", mailboxdir, mboxname);
-		free(s);
-	}
-
-	s = estrstrdup(fsname, "/");
-	mbox.name = estrstrdup(maildir, s);
-	mbox.level= 0;
-	readmbox(&mbox, maildir, s);
-	home = getenv("home");
-	if(home == nil)
-		home = "/";
-
-	wbox = newwindow();
-	winname(wbox, mbox.name);
-	wintagwrite(wbox, "Put Mail Delmesg Save Next ", 3+1+4+1+7+1+4+1+4+1);
-	threadcreate(mainctl, wbox, STACK);
-
-	fmtstrinit(&fmt);
-	fmtprint(&fmt, "Mail");
-	if(shortmenu)
-		fmtprint(&fmt, " -%c", "sS"[shortmenu-1]);
-	if(altmenu)
-		fmtprint(&fmt, " -A");
-	if(outgoing)
-		fmtprint(&fmt, " -o %s", outgoing);
-	fmtprint(&fmt, " %s", name);
-	cmd = fmtstrflush(&fmt);
-	if(cmd == nil)
-		sysfatal("out of memory");
-	winsetdump(wbox, "/acme/mail", cmd);
-	mbox.w = wbox;
-
-	mesgmenu(wbox, &mbox);
-	winclean(wbox);
-
-	wctlfd = open("/dev/wctl", OWRITE|OCEXEC);	/* for acme window */
-	cplumb = chancreate(sizeof(Plumbmsg*), 0);
-	cplumbshow = chancreate(sizeof(Plumbmsg*), 0);
-	if(strcmp(name, "mbox") == 0){
-		/*
-		 * Avoid creating multiple windows to send mail by only accepting
-		 * sendmail plumb messages if we're reading the main mailbox.
-		 */
-		plumbsendmailfd = plumbopen("sendmail", OREAD|OCEXEC);
-		cplumbsend = chancreate(sizeof(Plumbmsg*), 0);
-		proccreate(plumbsendproc, nil, STACK);
-		threadcreate(plumbsendthread, nil, STACK);
-	}
-	/* start plumb reader as separate proc ... */
-	proccreate(plumbproc, nil, STACK);
-	proccreate(plumbshowproc, nil, STACK);
-	threadcreate(plumbshowthread, nil, STACK);
-	/* ... and use this thread to read the messages */
-	plumbthread();
-}
-
-void
-plumbproc(void*)
-{
-	Plumbmsg *m;
-
-	threadsetname("plumbproc");
-	for(;;){
-		m = plumbrecv(plumbseemailfd);
-		sendp(cplumb, m);
-		if(m == nil)
-			threadexits(nil);
-	}
-}
-
-void
-plumbshowproc(void*)
-{
-	Plumbmsg *m;
-
-	threadsetname("plumbshowproc");
-	for(;;){
-		m = plumbrecv(plumbshowmailfd);
-		sendp(cplumbshow, m);
-		if(m == nil)
-			threadexits(nil);
-	}
-}
-
-void
-plumbsendproc(void*)
-{
-	Plumbmsg *m;
-
-	threadsetname("plumbsendproc");
-	for(;;){
-		m = plumbrecv(plumbsendmailfd);
-		sendp(cplumbsend, m);
-		if(m == nil)
-			threadexits(nil);
-	}
-}
-
-void
-newmesg(char *name, char *digest)
-{
-	Dir *d;
-
-	if(strncmp(name, mbox.name, strlen(mbox.name)) != 0)
-		return;	/* message is about another mailbox */
-	if(mesglookupfile(&mbox, name, digest) != nil)
-		return;
-	d = dirstat(name);
-	if(d == nil)
-		return;
-	if(mesgadd(&mbox, mbox.name, d, digest))
-		mesgmenunew(wbox, &mbox);
-	free(d);
-}
-
-void
-showmesg(char *name, char *digest)
-{
-	char *n;
-
-	if(strncmp(name, mbox.name, strlen(mbox.name)) != 0)
-		return;	/* message is about another mailbox */
-	n = estrdup(name+strlen(mbox.name));
-	if(n[strlen(n)-1] != '/')
-		n = egrow(n, "/", nil);
-	mesgopen(&mbox, mbox.name, name+strlen(mbox.name), nil, 1, digest);
-	free(n);
-}
-
-void
-delmesg(char *name, char *digest, int dodel)
-{
-	Message *m;
-
-	m = mesglookupfile(&mbox, name, digest);
-	if(m != nil){
-		mesgmenumarkdel(wbox, &mbox, m, 0);
-		if(dodel)
-			m->writebackdel = 1;
-	}
-}
-
-void
-modmesg(char *name, char *digest)
-{
-	Message *m;
-	char *flags;
-
-	if((m = mesglookupfile(&mbox, name, digest)) == nil)
-		return;
-	if((flags = readfile(name, "/flags", nil)) == nil)
-		return;
-	free(m->flags);
-	m->flags = flags;
-	mesgmenureflag(mbox.w, m);
-}
-	
-
-extern int mesgsave(Message*, char*);
-void
-savemesg(char *box, char *name, char *digest)
-{
-	char *s;
-	int ok;
-	Message *m;
-
-	m = mesglookupfile(&mbox, name, digest);
-	if(!m || m->isreply)
-		return;
-	s = estrdup("\t[saved");
-	if(!box[0])
-		ok = mesgsave(m, "stored");
-	else{
-		ok = mesgsave(m, box);
-		s = eappend(s, " ", box);
-	}
-	if(ok){
-		s = egrow(s, "]", nil);
-		mesgmenumark(mbox.w, m->name, s);
-	}
-	free(s);
-	
-}
-
-void
-plumbthread(void)
-{
-	Plumbmsg *m;
-	Plumbattr *a;
-	char *type, *digest;
-
-	threadsetname("plumbthread");
-	while((m = recvp(cplumb)) != nil){
-		a = m->attr;
-		digest = plumblookup(a, "digest");
-		type = plumblookup(a, "mailtype");
-		if(type == nil)
-			fprint(2, "Mail: plumb message with no mailtype attribute\n");
-		else if(strcmp(type, "new") == 0)
-			newmesg(m->data, digest);
-		else if(strcmp(type, "delete") == 0)
-			delmesg(m->data, digest, 0);
-		else if(strcmp(type, "modify") == 0)
-			modmesg(m->data, digest);
-		else
-			fprint(2, "Mail: unknown plumb attribute %s\n", type);
-		plumbfree(m);
-	}
-	threadexits(nil);
-}
-
-void
-plumbshowthread(void*)
-{
-	Plumbmsg *m;
-
-	threadsetname("plumbshowthread");
-	while((m = recvp(cplumbshow)) != nil){
-		showmesg(m->data, plumblookup(m->attr, "digest"));
-		plumbfree(m);
-	}
-	threadexits(nil);
-}
-
-void
-plumbsendthread(void*)
-{
-	Plumbmsg *m;
-
-	threadsetname("plumbsendthread");
-	while((m = recvp(cplumbsend)) != nil){
-		mkreply(nil, "Mail", m->data, m->attr, nil);
-		plumbfree(m);
-	}
-	threadexits(nil);
-}
-
-int
-mboxcommand(Window *w, char *s)
-{
-	char *args[10], **targs, *r, *box;
-	Message *m, *next;
-	int ok, nargs, i, j;
-	char buf[128];
-
-	nargs = tokenize(s, args, nelem(args));
-	if(nargs == 0)
-		return 0;
-	if(strcmp(args[0], "Mail") == 0){
-		if(nargs == 1)
-			mkreply(nil, "Mail", "", nil, nil);
-		else
-			mkreply(nil, "Mail", args[1], nil, nil);
-		return 1;
-	}
-	if(strcmp(s, "Del") == 0){
-		if(mbox.dirty){
-			mbox.dirty = 0;
-			fprint(2, "mail: mailbox not written\n");
-			return 1;
-		}
-		ok = 1;
-		for(m=mbox.head; m!=nil; m=next){
-			next = m->next;
-			if(m->w){
-				if(windel(m->w, 0))
-					m->w = nil;
-				else
-					ok = 0;
-			}
-		}
-		for(m=replies.head; m!=nil; m=next){
-			next = m->next;
-			if(m->w){
-				if(windel(m->w, 0))
-					m->w = nil;
-				else
-					ok = 0;
-			}
-		}
-		if(ok){
-			windel(w, 1);
-			removeupasfs();
-			threadexitsall(nil);
-		}
-		return 1;
-	}
-	if(strcmp(s, "Put") == 0){
-		rewritembox(wbox, &mbox);
-		return 1;
-	}
-	if(strcmp(s, "Delmesg") == 0){
-		if(nargs > 1){
-			for(i=1; i<nargs; i++){
-				snprint(buf, sizeof buf, "%s%s", mbox.name, args[i]);
-				delmesg(buf, nil, 1);
-			}
-		}
-		s = winselection(w);
-		if(s == nil)
-			return 1;
-		nargs = 1;
-		for(i=0; s[i]; i++)
-			if(s[i] == '\n')
-				nargs++;
-		targs = emalloc(nargs*sizeof(char*));	/* could be too many for a local array */
-		nargs = getfields(s, targs, nargs, 1, "\n");
-		for(i=0; i<nargs; i++){
-			if(!isdigit(targs[i][0]))
-				continue;
-			j = atoi(targs[i]);	/* easy way to parse the number! */
-			if(j == 0)
-				continue;
-			snprint(buf, sizeof buf, "%s%d", mbox.name, j);
-			delmesg(buf, nil, 1);
-		}
-		free(s);
-		free(targs);
-		return 1;
-	}
-	if(strncmp(args[0], "Save", 4) == 0){
-		box = "";
-		i = 1;
-		if(nargs > 1 && !mesglookupfile(&mbox, args[1], nil)){
-			box = args[1];
-			i++;
-			nargs--;
-		}
-		if(nargs > 1){
-			for(; i<nargs; i++){
-				snprint(buf, sizeof buf, "%s%s", mbox.name, args[i]);
-				savemesg(box, buf, nil);
-			}
-		}
-		s = winselection(w);
-		if(s == nil)
-			return 1;
-		nargs = 1;
-		for(i=0; s[i]; i++)
-			if(s[i] == '\n')
-				nargs++;
-		targs = emalloc(nargs*sizeof(char*));	/* could be too many for a local array */
-		nargs = getfields(s, targs, nargs, 1, "\n");
-		for(i=0; i<nargs; i++){
-			if(!isdigit(targs[i][0]))
-				continue;
-			j = strtoul(targs[i], &r, 10);
-			if(j == 0 || *r != '/')
-				continue;
-			snprint(buf, sizeof buf, "%s%d", mbox.name, j);
-			savemesg(box, buf, nil);
-		}
-		free(s);
-		free(targs);
-		return 1;
-	}
-	if(strcmp(args[0], "Next") == 0){
-		ctlprint(w->ctl, "addr=dot\n");
-		winselect(w, "/^[0-9]*\\/ \\[\\*.*(\\n(\t.*)*)/", 1);
-		ctlprint(w->ctl, "show\n");
-	}
-	return 0;
-}
-
-void
-mainctl(void *v)
-{
-	Window *w;
-	Event *e, *e2, *eq, *ea;
-	int na, nopen;
-	char *s, *t, *buf;
-
-	w = v;
-	proccreate(wineventproc, w, STACK);
-
-	for(;;){
-		e = recvp(w->cevent);
-		switch(e->c1){
-		default:
-		Unknown:
-			print("unknown message %c%c\n", e->c1, e->c2);
-			break;
-	
-		case 'E':	/* write to body; can't affect us */
-			break;
-	
-		case 'F':	/* generated by our actions; ignore */
-			break;
-	
-		case 'K':	/* type away; we don't care */
-			break;
-	
-		case 'M':
-			switch(e->c2){
-			case 'x':
-			case 'X':
-				ea = nil;
-				e2 = nil;
-				if(e->flag & 2)
-					e2 = recvp(w->cevent);
-				if(e->flag & 8){
-					ea = recvp(w->cevent);
-					na = ea->nb;
-					recvp(w->cevent);
-				}else
-					na = 0;
-				s = e->b;
-				/* if it's a known command, do it */
-				if((e->flag&2) && e->nb==0)
-					s = e2->b;
-				if(na){
-					t = emalloc(strlen(s)+1+na+1);
-					sprint(t, "%s %s", s, ea->b);
-					s = t;
-				}
-				/* if it's a long message, it can't be for us anyway */
-				if(!mboxcommand(w, s))	/* send it back */
-					winwriteevent(w, e);
-				if(na)
-					free(s);
-				break;
-	
-			case 'l':
-			case 'L':
-				buf = nil;
-				eq = e;
-				if(e->flag & 2){
-					e2 = recvp(w->cevent);
-					eq = e2;
-				}
-				s = eq->b;
-				if(eq->q1>eq->q0 && eq->nb==0){
-					buf = emalloc((eq->q1-eq->q0)*UTFmax+1);
-					winread(w, eq->q0, eq->q1, buf);
-					s = buf;
-				}
-				nopen = 0;
-				do{
-					/* skip 'deleted' string if present' */
-					if(strncmp(s, deleted, strlen(deleted)) == 0)
-						s += strlen(deleted);
-					/* skip mail box name if present */
-					if(strncmp(s, mbox.name, strlen(mbox.name)) == 0)
-						s += strlen(mbox.name);
-					nopen += mesgopen(&mbox, mbox.name, s, nil, 0, nil);
-					while(*s!='\0' && *s++!='\n')
-						;
-				}while(*s);
-				if(nopen == 0)	/* send it back */
-					winwriteevent(w, e);
-				free(buf);
-				break;
-	
-			case 'I':	/* modify away; we don't care */
-			case 'D':
-			case 'd':
-			case 'i':
-				break;
-	
-			default:
-				goto Unknown;
-			}
-		}
-	}
-}
-
--- /dev/null
+++ b/sys/src/cmd/upas/Mail/mail.h
@@ -1,0 +1,195 @@
+typedef struct Event	Event;
+typedef struct Win	Win;
+typedef struct Mesg	Mesg;
+typedef struct Mbox	Mbox;
+typedef struct Comp	Comp;
+
+enum {
+	Stack	= 64*1024,
+	Bufsz	= 8192,
+	Eventsz	= 256*UTFmax,
+	Subjlen	= 56,
+};
+
+enum {
+	Sdummy	= 1<<0,	/* message placeholder */
+	Stoplev	= 1<<1,	/* not a response to anything */
+	Sopen	= 1<<2,	/* opened for viewing */
+};
+
+enum {
+	Fresp	= 1<<0,	/* has been responded to */
+	Fseen	= 1<<1,	/* has been viewed */
+	Fdel	= 1<<2, /* was deleted */
+	Ftodel	= 1<<3,	/* pending deletion */
+};
+
+enum {
+	Vflat,
+	Vgroup,
+};
+
+struct Event {
+	char	action;
+	char	type;
+	int	p0;	/* click point */
+	int	q0;	/* expand lo */
+	int	q1;	/* expand hi */
+	int	flags;
+	int	ntext;
+	char	text[Eventsz + 1];
+};
+
+struct Win {
+	int	id;
+	Ioproc	*io;
+	Biobuf	*event;
+	int	revent;
+	int	ctl;
+	int	addr;
+	int	data;
+	int	open;
+};
+
+/*
+ * In progress compositon
+ */
+struct Comp {
+	Win;
+
+	/* exec setup */
+	Channel *sync;
+	int	fd[2];
+
+	/* to relate back the message */
+	char	*replyto;
+	char	*rname;
+	char	*rpath;
+	char	*rdigest;
+	char	*path;
+
+	int	quitting;
+	Comp	*qnext;
+};
+
+/*
+ * Message in mailbox
+ */
+struct Mesg {
+	Win;
+
+	/* bookkeeping */
+	char	*name;
+	int	state;
+	int	flags;
+	u32int	hash;
+	char	quitting;
+	Mesg	*qnext;
+
+	/* exec setup */
+	Channel *sync;
+	char	*path;
+	int	fd[2];
+
+	Mesg	*parent;
+	Mesg	**child;
+	int	nchild;
+	int	nsub;	/* transitive children */
+	
+	Mesg	*body;	/* best attachment to use, or nil */
+	Mesg	**parts;
+	int	nparts;
+	int xparts;
+
+	/* info fields */
+	char	*from;
+	char	*to;
+	char	*cc;
+	char	*replyto;
+	char	*date;
+	char	*subject;
+	char	*type;
+	char	*disposition;
+	char	*messageid;
+	char	*filename;
+	char	*digest;
+	char	*mflags;
+	char	*fromcolon;
+	char	*inreplyto;
+
+	vlong	time;
+};
+
+/*
+ *The mailbox we're showing.
+ */
+struct Mbox {
+	Win;
+
+	Mesg	**mesg;
+	Mesg	**hash;
+	int	mesgsz;
+	int	hashsz;
+	int	nmesg;
+	int	ndead;
+
+	Mesg	*openmesg;
+	Comp	*opencomp;
+	int	canquit;
+
+	Channel	*see;
+	Channel	*show;
+	Channel	*event;
+	Channel	*send;
+
+	int	view;
+	int	nopen;
+	char	*path;
+};
+
+extern Mbox	mbox;
+extern Reprog	*mesgpat;
+extern char	*savebox;
+
+/* window management */
+void	wininit(Win*, char*);
+int	winopen(Win*, char*, int);
+Biobuf	*bwinopen(Win*, char*, int);
+Biobuf	*bwindata(Win*, int);
+void	winclose(Win*);
+void	wintagwrite(Win*, char*);
+int	winevent(Win*, Event*);
+void	winreturn(Win*, Event*);
+int	winread(Win*, int, int, char*, int);
+int	matchmesg(Win*, char*);
+char	*winreadsel(Win*);
+void	wingetsel(Win*, int*, int*);
+void	winsetsel(Win*, int, int);
+
+/* messages */
+Mesg	*mesglookup(char*, char*);
+Mesg	*mesgload(char*);
+Mesg	*mesgopen(char*, char*);
+int	mesgmatch(Mesg*, char*, char*);
+void	mesgclear(Mesg*);
+void	mesgfree(Mesg*);
+void	mesgpath2name(char*, int, char*);
+int	mesgflagparse(char*, int*);
+Biobuf*	mesgopenbody(Mesg*);
+
+/* mailbox */
+void	mbredraw(Mesg*, int, int);
+
+/* composition */
+void	compose(char*, Mesg*, int);
+
+/* utils */
+void	*emalloc(ulong);
+void	*erealloc(void*, ulong);
+char	*estrdup(char*);
+char	*estrjoin(char*, ...);
+char	*esmprint(char*, ...);
+char	*rslurp(Mesg*, char*, int*);
+char	*fslurp(int, int*);
+u32int	strhash(char*);
+
--- /dev/null
+++ b/sys/src/cmd/upas/Mail/mbox.c
@@ -1,0 +1,1056 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <thread.h>
+#include <plumb.h>
+#include <ctype.h>
+#include <regexp.h>
+
+#include "mail.h"
+
+typedef struct Fn	Fn;
+
+struct Fn {
+	char *name;
+	void (*fn)(char **, int);
+};
+
+enum {
+	Cevent,
+	Cseemail,
+	Cshowmail,
+	Csendmail,
+	Nchan,
+};
+
+
+char	*maildir	= "/mail/fs";
+char	*mailbox	= "mbox";
+char	*savebox	= "outgoing";
+char	*listfmt	= "%>48s\t<%f>";
+Mesg	dead = {.messageid="", .hash=42};
+
+Reprog	*mesgpat;
+
+int	threadsort = 1;
+int	sender;
+
+int	plumbsendfd;
+int	plumbseemailfd;
+int	plumbshowmailfd;
+int	plumbsendmailfd;
+Channel *cwait;
+
+Mbox	mbox;
+
+static void	showmesg(Biobuf*, Mesg*, int, int);
+
+static void
+plumbloop(Channel *ch, int fd)
+{
+	Plumbmsg *m;
+
+	while(1){
+		if((m = plumbrecv(fd)) == nil)
+			threadexitsall("plumber gone");
+		sendp(ch, m);
+	}
+}
+
+static void
+plumbshowmail(void*)
+{
+	threadsetname("plumbshow %s", mbox.path);
+	plumbloop(mbox.show, plumbshowmailfd);
+}
+
+static void
+plumbseemail(void*)
+{
+	threadsetname("plumbsee %s", mbox.path);
+	plumbloop(mbox.see, plumbseemailfd);
+}
+
+static void
+plumbsendmail(void*)
+{
+	threadsetname("plumbsend %s", mbox.path);
+	plumbloop(mbox.send, plumbsendmailfd);
+}
+
+static void
+eventread(void*)
+{
+	Event *ev;
+
+	threadsetname("mbevent %s", mbox.path);
+	while(1){
+		ev = emalloc(sizeof(Event));
+		if(winevent(&mbox, ev) == -1)
+			break;
+		sendp(mbox.event, ev);
+	}
+	sendp(mbox.event, nil);
+	threadexits(nil);
+}
+
+static int
+ideq(char *a, char *b)
+{
+	if(a == nil || b == nil)
+		return 0;
+	return strcmp(a, b) == 0;
+}
+
+static int
+cmpmesg(void *pa, void *pb)
+{
+	Mesg *a, *b;
+
+	a = *(Mesg**)pa;
+	b = *(Mesg**)pb;
+
+	return b->time - a->time;
+}
+
+static int
+rcmpmesg(void *pa, void *pb)
+{
+	Mesg *a, *b;
+
+	a = *(Mesg**)pa;
+	b = *(Mesg**)pb;
+
+	return a->time - b->time;
+}
+
+static int
+mesglineno(Mesg *msg, int *depth)
+{
+	Mesg *p, *m;
+	int i, o, n, d;
+
+	o = 0;
+	d = 0;
+	n = 1;
+
+	/* Walk up to root, counting depth in the thread */
+	p = msg;
+	while(p->parent != nil){
+		m = p;
+		p = p->parent;
+		for(i = 0; i < p->nchild; i++){
+			if(p->child[i] == m)
+				break;
+			o += p->child[i]->nsub + 1;
+		}
+		if(!(p->state & Sdummy)){
+			o++;
+			d++;
+		}
+	}
+
+	/* Find the thread in the thread list */
+	for(i = 0; i < mbox.nmesg; i++){
+		m = mbox.mesg[i];
+		if(m == p)
+			break;
+		if(m->state & Stoplev){
+			n += mbox.mesg[i]->nsub;
+			if(!(m->state & Sdummy))
+				n++;
+		}
+
+	}
+	if(depth != nil)
+		*depth = d;
+	assert(n + o <= mbox.nmesg);
+	return n + o;
+}
+
+static int
+addchild(Mesg *p, Mesg *m, int d)
+{
+	Mesg *q;
+
+	assert(m->parent == nil);
+	for(q = p; q != nil; q = q->parent){
+		if(ideq(m->messageid, q->messageid)){
+			fprint(2, "wonky message replies to self\n");
+			return 0;
+		}
+		if(m->time > q->time)
+			q->time = m->time;
+	}
+	for(q = p; q != nil; q = q->parent)
+		q->nsub += d;
+	p->child = erealloc(p->child, ++p->nchild*sizeof(Mesg*));
+	p->child[p->nchild - 1] = m;
+	qsort(p->child, p->nchild, sizeof(Mesg*), rcmpmesg);
+	m->parent = p;
+	return 1;
+}
+
+static int
+slotfor(Mesg *m)
+{
+	int i;
+
+	for(i = 0; i < mbox.nmesg; i++)
+		if(cmpmesg(&mbox.mesg[i], &m) >= 0)
+			break;
+	return i;
+}
+
+static void
+removeid(Mesg *m)
+{
+	Mesg *e;
+	int i;
+
+	/* Dummies don't go in the table */
+	if(m->state & Sdummy)
+		return;
+	i = m->hash % mbox.hashsz;
+	while(1){
+		e = mbox.hash[i];
+		if(e == nil)
+			return;
+		if(e != &dead && e->hash == m->hash && strcmp(e->messageid, m->messageid) == 0){
+			mbox.hash[i] = &dead;
+			mbox.ndead++;
+		}
+		i = (i + 1) % mbox.hashsz;
+	}
+}
+
+Mesg*
+lookupid(char *msgid)
+{
+	u32int h, i;
+	Mesg *e;
+
+	if(msgid == nil || strlen(msgid) == 0)
+		return nil;
+	h = strhash(msgid);
+	i = h % mbox.hashsz;
+	while(1){
+		e = mbox.hash[i];
+		if(e == nil)
+			return nil;
+		if(e != &dead && e->hash == h && strcmp(e->messageid, msgid) == 0)
+			return e;
+		i = (i + 1) % mbox.hashsz;
+	}
+}
+
+static void
+addmesg(Mesg *m, int ins)
+{
+	Mesg *o, *e, **oldh;
+	int i, oldsz, idx;
+
+	/* 
+	 * on initial load, it's faster to append everything then sort,
+	 * but on subsequent messages it's better to just put it in the
+	 * right place; we don't want to shuffle the already-sorted
+	 * messages.
+	 */
+	if(mbox.nmesg == mbox.mesgsz){
+		mbox.mesgsz *= 2;
+		mbox.mesg = erealloc(mbox.mesg, mbox.mesgsz*sizeof(Mesg*));
+	}
+	if(ins)
+		idx = slotfor(m);
+	else
+		idx = mbox.nmesg;
+	memmove(&mbox.mesg[idx + 1], &mbox.mesg[idx], (mbox.nmesg - idx)*sizeof(Mesg*));
+	mbox.mesg[idx] = m;
+	mbox.nmesg++;
+	if(m->messageid == nil)
+		return;
+
+	/* grow hash table, or squeeze out deadwood */
+	if(mbox.hashsz <= 2*(mbox.nmesg + mbox.ndead)){
+		oldsz = mbox.hashsz;
+		oldh = mbox.hash;
+		if(mbox.hashsz <= 2*mbox.nmesg)
+			mbox.hashsz *= 2;
+		mbox.ndead = 0;
+		mbox.hash = emalloc(mbox.hashsz*sizeof(Mesg*));
+		for(i = 0; i < oldsz; i++){
+			if((o = oldh[i]) == nil)
+				continue;
+			mbox.hash[o->hash % mbox.hashsz] = o;
+		}
+		free(oldh);
+	}
+	i = m->hash % mbox.hashsz;
+	while(1){
+		e = mbox.hash[i % mbox.hashsz];
+		if(e == nil || e == &dead)
+			break;
+		i = (i + 1) % mbox.hashsz;
+	}
+	mbox.hash[i] = m;
+}
+
+static Mesg *
+placeholder(char *msgid, vlong time, int ins)
+{
+	Mesg *m;
+
+	m = emalloc(sizeof(Mesg));
+	m->state |= Sdummy|Stoplev;
+	m->messageid = estrdup(msgid);
+	m->hash = strhash(msgid);
+	m->time = time;
+	addmesg(m, ins);
+	return m;
+}
+
+static Mesg*
+change(char *name, char *digest)
+{
+	Mesg *m;
+	char *f;
+
+	if((m = mesglookup(name, digest)) == nil)
+		return nil;
+	if((f = rslurp(m, "flags", nil)) == nil)
+		return nil;
+	free(m->mflags);
+	m->mflags = f;
+	m->flags = 0;
+	if(strchr(m->mflags, 'd')) m->flags |= Fdel;
+	if(strchr(m->mflags, 's')) m->flags |= Fseen;
+	if(strchr(m->mflags, 'a')) m->flags |= Fresp;
+	return m;
+}
+
+static Mesg*
+delete(char *name, char *digest)
+{
+	Mesg *m;
+
+	if((m = mesglookup(name, digest)) == nil)
+		return nil;
+	m->flags |= Fdel;
+	return m;
+}
+
+static Mesg*
+load(char *name, char *digest, int ins)
+{
+	Mesg *m, *p;
+	int d;
+
+	if(strncmp(name, mbox.path, strlen(mbox.path)) == 0)
+		name += strlen(mbox.path);
+	if((m = mesgload(name)) == nil)
+		goto error;
+
+	if(digest != nil && strcmp(digest, m->digest) != 0)
+		goto error;
+	/* if we already have a dummy, populate it */
+	d = 1;
+	p = lookupid(m->messageid);
+	if(p != nil && (p->state & Sdummy)){
+		d = p->nsub + 1;
+		m->child = p->child;
+		m->nchild = p->nchild;
+		m->nsub = p->nsub;
+		mesgclear(p);
+		memcpy(p, m, sizeof(*p));
+		free(m);
+		m = p;
+
+	}else{
+		/*
+		 * if we raced a notify and a mailbox load, we
+		 * can get duplicate load requests for the same
+		 * name in the mailbox.
+		 */
+		if(p != nil && strcmp(p->name, m->name) == 0)
+			goto error;
+		addmesg(m, ins);
+	}
+
+	if(!threadsort || m->inreplyto == nil || ideq(m->messageid, m->inreplyto)){
+		m->state |= Stoplev;
+		return m;
+	}
+	p = lookupid(m->inreplyto);
+	if(p == nil)
+		p = placeholder(m->inreplyto, m->time, ins);
+	if(!addchild(p, m, d))
+		m->state |= Stoplev;
+	return m;
+error:
+	mesgfree(m);
+	return nil;
+}
+
+void
+mbredraw(Mesg *m, int add, int rec)
+{
+	Biobuf *bfd;
+	int ln, depth;
+
+	ln = mesglineno(m, &depth);
+	fprint(mbox.addr, "%d%s", ln, add?"-#0":"");
+	bfd = bwindata(&mbox, OWRITE);
+	showmesg(bfd, m, depth, rec);
+	Bterm(bfd);
+
+	/* highlight the redrawn message */
+	fprint(mbox.addr, "%d%s", ln, add ? "-#0" : "");
+	fprint(mbox.ctl, "dot=addr\n");
+}
+
+static void
+mbload(void)
+{
+	int i, n, fd;
+	Dir *d;
+
+	mbox.mesgsz = 128;
+	mbox.hashsz = 128;
+	mbox.mesg = emalloc(mbox.mesgsz*sizeof(Mesg*));
+	mbox.hash = emalloc(mbox.hashsz*sizeof(Mesg*));
+	mbox.path = esmprint("%s/%s/", maildir, mailbox);
+	cleanname(mbox.path);
+	n = strlen(mbox.path);
+	if(mbox.path[n - 1] != '/')
+		mbox.path[n] = '/';
+	if((fd = open(mbox.path, OREAD)) == -1)
+		sysfatal("%s: open: %r", mbox.path);
+	while(1){
+		n = dirread(fd, &d);
+		if(n == -1)
+			sysfatal("%s read: %r", mbox.path);
+		if(n == 0)
+			break;
+		for(i = 0; i < n; i++)
+			if(strcmp(d[i].name, "ctl") != 0)
+				load(d[i].name, nil, 0);
+		free(d);
+	}
+	qsort(mbox.mesg, mbox.nmesg, sizeof(Mesg*), cmpmesg);	
+}
+
+static char*
+getflag(Mesg *m)
+{
+	char* flag;
+
+	flag = "★";
+	if(m->flags & Fseen)	flag = " ";
+	if(m->flags & Fresp)	flag = "←";
+	if(m->flags & Fdel)	flag = "∉";
+	if(m->flags & Ftodel)	flag = "∉";
+	return flag;
+}
+
+static void
+printw(Biobuf *bp, char *s, int width)
+{
+	char *dots;
+
+	if(width <= 0)
+		Bprint(bp, "%s", s);
+	else{
+		dots = "";
+		if(utflen(s) > width){
+			width -= 3;
+			dots = "...";
+		}
+		Bprint(bp, "%*.*s%s", -width, width, s, dots);
+	}
+}
+
+/*
+ * Message format string:
+ * ======================
+  * %s: subject
+ * %f: from address
+ * %F: name + from address
+ * %t: to address
+ * %c: CC address
+ * %r: replyto address
+ * %[...]: string to display for child messages
+ * %{...}: date format string
+ */
+static void
+fmtmesg(Biobuf *bp, char *fmt, Mesg *m, int depth)
+{
+	char *p, *e, buf[64];
+	int width, i, indent;
+	Tm tm;
+
+	Bprint(bp, "%-6s\t%s ", m->name, getflag(m));
+	for(p = fmt; *p; p++){
+		if(*p != '%'){
+			Bputc(bp, *p);
+			continue;
+		}
+		p++;
+		width = 0;
+		indent = 0;
+		while(*p == '>'){
+			p++;
+			indent++;
+		}
+		while('0'<=*p && *p<='9')
+			width = width * 10 + *p++ - '0';
+		for(i = 0; indent && i < depth; i++){
+			Bputc(bp, '\t');
+			width -= 4;
+			if(indent == 1)
+				break;
+		}
+		switch(*p){
+		case '%':
+			Bprint(bp, "%%");
+			break;
+		case 'i':
+			if(depth > 0)
+				depth = 1;
+		case 'I':
+			for(i = 0; i < depth; i++){
+				if(width>0)
+					Bprint(bp, "%*s", width, "");
+				else
+					Bprint(bp, "\t");
+			}
+			break;
+		case 's':
+			printw(bp, m->subject, width);
+			break;
+		case 'f':
+			printw(bp, m->from, width);
+			break;
+		case 'F':
+			printw(bp, m->fromcolon, width);
+			break;
+		case 't':
+			printw(bp, m->to, width);
+			break;
+		case 'c':
+			printw(bp, m->cc, width);
+			break;
+		case 'r':
+			printw(bp, m->replyto, width);
+			break;
+		case '[':
+			p++;
+			if((e = strchr(p, ']')) == nil)
+				sysfatal("missing closing '}' in %%{");
+			if(e - p >= sizeof(buf) - 1)
+				sysfatal("%%{} contents too long");
+			snprint(buf, sizeof(buf), "%.*s", (int)(e - p), p);
+			if(depth > 0)
+				Bprint(bp, "%s", buf);
+			p = e;
+			break;
+		case '{':
+			p++;
+			if((e = strchr(p, '}')) == nil)
+				sysfatal("missing closing '}' in %%{");
+			if(e - p >= sizeof(buf) - 1)
+				sysfatal("%%{} contents too long");
+			snprint(buf, sizeof(buf), "%.*s", (int)(e - p), p);
+			tmtime(&tm, m->time, nil);
+			Bprint(bp, "%τ", tmfmt(&tm, buf));
+			p = e;
+			break;
+		default:
+			sysfatal("invalid directive '%%%c' in format string", *p);
+			break;
+		}
+	}
+	Bputc(bp, '\n');
+}
+
+
+static void
+showmesg(Biobuf *bfd, Mesg *m, int depth, int recurse)
+{
+	int i;
+
+	if(!(m->state & Sdummy)){
+		fmtmesg(bfd, listfmt, m, depth);
+		depth++;
+	}
+	if(recurse && mbox.view != Vflat)
+		for(i = 0; i < m->nchild; i++)
+			showmesg(bfd, m->child[i], depth, recurse);
+}
+
+static void
+mark(char **f, int nf, char *fstr, int flags, int add)
+{
+	char *sel, *p, *q, *e, *path;
+	int i, q0, q1, fd;
+	Mesg *m;
+
+	if(flags == 0)
+		return;
+	wingetsel(&mbox, &q0, &q1);
+	if(nf == 0){
+		sel = winreadsel(&mbox);
+		for(p = sel; p != nil; p = e){
+			if((e = strchr(p, '\n')) != nil)
+				*e++ = 0;
+			if(!matchmesg(&mbox, p))
+				continue;
+			if((q = strchr(p, '/')) != nil)
+				q[1] = 0;
+			if((m = mesglookup(p, nil)) != nil){
+				if(add)
+					m->flags |= flags;
+				else
+					m->flags &= ~flags;
+				if(fstr != nil && strlen(fstr) != 0){
+					path = estrjoin(mbox.path, "/", m->name, "/flags", nil);
+					if((fd = open(path, OWRITE)) != -1){
+						fprint(fd, fstr);
+						close(fd);
+					}
+					free(path);
+				}
+				mbredraw(m, 0, 0);
+			}
+		}
+		free(sel);
+	}else for(i = 0; i < nf; i++){
+		if((m = mesglookup(f[i], nil)) != nil){
+			m->flags |= flags;
+			mbredraw(m, 0, 0);
+		}
+	}
+	winsetsel(&mbox, q0, q1);
+}
+
+static void
+mbmark(char **f, int nf)
+{
+	int add, flg;
+
+	if(nf == 0){
+		fprint(2, "missing fstr");
+		return;
+	}
+	if((flg = mesgflagparse(f[0], &add)) == -1){
+		fprint(2, "Mark: invalid flags %s\n", f[0]);
+		return;
+	}
+	mark(f+1, nf-1, f[0], flg, add);
+}
+
+static void
+relinkmsg(Mesg *p, Mesg *m)
+{
+	Mesg *c, *pp;
+	int i, j;
+
+	/* remove child, preserving order */
+	j = 0;
+	for(i = 0; p && i < p->nchild; i++){
+		if(p->child[i] != m)
+			p->child[j++] = p->child[i];
+	}
+	p->nchild = j;
+	for(pp = p; pp != nil; pp = pp->parent)
+		pp->nsub -= m->nsub + 1;
+
+	/* reparent children */
+	for(i = 0; i < m->nchild; i++){
+		c = m->child[i];
+		c->parent = nil;
+		addchild(p, c, c->nsub + 1);
+	}
+}
+
+static void
+mbflush(char **, int)
+{
+	int i, j, ln, fd;
+	char *path;
+	Mesg *m, *p;
+
+	i = 0;
+	path = estrjoin(maildir, "/ctl", nil);
+	fd = open(path, OWRITE);
+	free(path);
+	if(fd == -1)
+		sysfatal("open mbox: %r");
+	while(i < mbox.nmesg){
+		m = mbox.mesg[i];
+		if((m->state & Sopen) || !(m->flags & (Fdel|Ftodel))){
+			i++;
+			continue;
+		}
+		ln = mesglineno(m, nil);
+		fprint(mbox.addr, "%d,%d", ln, ln+m->nsub);
+		write(mbox.data, "", 0);
+		if(m->flags & Ftodel)
+			fprint(fd, "delete %s %d", mailbox, atoi(m->name));
+
+		p = m->parent;
+		removeid(m);
+		if(p == nil && m->nsub != 0){
+			p = placeholder(m->messageid, m->time, 1);
+			p->nsub = m->nsub + 1;
+			mbox.mesg[i] = p;
+		}
+		if(p != nil)
+			relinkmsg(p, m);
+		for(j = 0; j < m->nchild; j++)
+			mbredraw(m->child[j], 1, 1);
+		memmove(&mbox.mesg[i], &mbox.mesg[i+1], (mbox.nmesg - i)*sizeof(Mesg*));
+		mbox.nmesg--;
+ 	}
+	close(fd);
+	fprint(mbox.ctl, "clean\n");
+}
+
+static void
+mbcompose(char **, int)
+{
+	compose("", nil, 0);
+}
+
+static void
+delmesg(char **f, int nf)
+{
+	mark(f, nf, nil, Ftodel, 1);
+}
+
+static void
+undelmesg(char **f, int nf)
+{
+	mark(f, nf, nil, Ftodel, 0);
+}
+
+static void
+showlist(void)
+{
+	Biobuf *bfd;
+	Mesg *m;
+	int i;
+
+	bfd = bwinopen(&mbox, "data", OWRITE);
+	for(i = 0; i < mbox.nmesg; i++){
+		m = mbox.mesg[i];
+		if(mbox.view == Vflat || m->state & (Sdummy|Stoplev))
+			showmesg(bfd, m, 0, 1);
+	}
+	Bterm(bfd);
+	fprint(mbox.addr, "0");
+	fprint(mbox.ctl, "dot=addr\n");
+	fprint(mbox.ctl, "show\n");
+}
+
+static void
+quitall(char **, int)
+{
+	Mesg *m;
+	Comp *c;
+
+	if(mbox.nopen > 0 && !mbox.canquit){
+		fprint(2, "Del: %d open messages\n", mbox.nopen);
+		mbox.canquit = 1;
+		return;
+	}
+	for(m = mbox.openmesg; m != nil; m = m->qnext)
+		fprint(m->ctl, "del\n");
+	for(c = mbox.opencomp; c != nil; c = c->qnext)
+		fprint(c->ctl, "del\n");
+	fprint(mbox.ctl, "del\n");
+	threadexitsall(nil);
+}
+
+/*
+ * shuffle a message to the right location
+ * in the list without doing a full sort.
+ */
+static void
+reinsert(Mesg *m)
+{
+	int i, idx;
+
+	idx = slotfor(m);
+	for(i = idx; i < mbox.nmesg; i++)
+		if(mbox.mesg[i] == m)
+			break;
+	memmove(&mbox.mesg[idx + 1], &mbox.mesg[idx], (i - idx)*sizeof(Mesg*));
+	mbox.mesg[idx] = m;
+}
+
+static void
+changemesg(Plumbmsg *pm)
+{
+	char *digest, *action;
+	Mesg *m, *r;
+	int ln, nr;
+
+	digest = plumblookup(pm->attr, "digest");
+	action = plumblookup(pm->attr, "mailtype");
+//	fprint(2, "changing message %s, %s %s\n", action, pm->data, digest);
+	if(strcmp(action, "new") == 0){
+		if((m = load(pm->data, digest, 1)) == nil)
+			return;
+		for(r = m; r->parent != nil; r = r->parent)
+			/* nothing */;
+		/* Bump whole thread up in list */
+		if(r->nsub > 0){
+			ln = mesglineno(r, nil);
+			nr = r->nsub-1;
+			if(!(r->state & Sdummy))
+				nr++;
+			/*
+			 * We can end up with an empty container
+			 * in an edge case.
+			 *
+			 * Imagine we have a dummy message with
+			 * a child, and that child gets deleted,
+			 * then a new message comes in replying
+			 * to that dummy.
+			 *
+			 * In this case, r->nsub == 1 due to the
+			 * newly added message, so nr=0.
+			 * in that case, skip the redraw, and
+			 * reinsert the dummy in the right place.
+			 */
+			if(nr > 0){
+				fprint(mbox.addr, "%d,%d", ln, ln+nr-1);
+				write(mbox.data, "", 0);
+			}
+			reinsert(r);
+		}
+		mbredraw(r, 1, 1);
+	}else if(strcmp(action, "delete") == 0){
+		if((m = delete(pm->data, digest)) != nil)
+			mbredraw(m, 0, 0);
+	}else if(strcmp(action, "modify") == 0){
+		if((m = change(pm->data, digest)) != nil)
+			mbredraw(m, 0, 0);
+	}
+}
+
+static void
+viewmesg(Plumbmsg *pm)
+{
+	Mesg *m;
+	m = mesgopen(pm->data, plumblookup(pm->attr, "digest"));
+	if(m != nil){
+		fprint(mbox.addr, "%d", mesglineno(m, nil));
+		fprint(mbox.ctl, "dot=addr\n");
+		fprint(mbox.ctl, "show\n");
+	}
+}
+
+static void
+redraw(char **, int)
+{
+	fprint(mbox.addr, ",");
+	showlist();
+}
+
+static void
+nextunread(char **, int)
+{
+	fprint(mbox.ctl, "addr=dot\n");
+	fprint(mbox.addr, "/^[0-9]+\\/ *\t★.*");
+	fprint(mbox.ctl, "dot=addr\n");
+	fprint(mbox.ctl, "show\n");
+}
+
+Fn mboxfn[] = {
+	{"Put",	mbflush},
+	{"Mail", mbcompose},
+	{"Delmesg", delmesg},
+	{"Undelmesg", undelmesg},
+	{"Del", quitall},
+	{"Redraw", redraw},
+	{"Next", nextunread},
+	{"Mark", mbmark},
+#ifdef NOTYET
+	{"Filter", filter},
+	{"Get", mbrefresh},
+#endif
+	{nil}
+};
+
+static void
+doevent(Event *ev)
+{
+	char *f[32];
+	int nf;
+	Fn *p;
+
+	if(ev->action != 'M')
+		return;
+	switch(ev->type){
+	case 'l':
+	case 'L':
+		if(matchmesg(&mbox, ev->text))
+			if(mesgopen(ev->text, nil) != nil)
+				break;
+		winreturn(&mbox, ev);
+		break;
+	case 'x':
+	case 'X':
+		if((nf = tokenize(ev->text, f, nelem(f))) == 0)
+			return;
+		for(p = mboxfn; p->fn != nil; p++)
+			if(strcmp(p->name, f[0]) == 0 && p->fn != nil){
+				p->fn(&f[1], nf - 1);
+				break;
+			}
+		if(p->fn == nil)
+			winreturn(&mbox, ev);
+		else if(p->fn != quitall)
+			mbox.canquit = 0;
+		break;
+	}
+}
+
+static void
+execlog(void*)
+{
+	Waitmsg *w;
+
+	while(1){
+		w = recvp(cwait);
+		if(w->msg[0] != 0)
+			fprint(2, "%d: %s\n", w->pid, w->msg);
+		free(w);
+	}
+} 
+
+static void
+mbmain(void *cmd)
+{
+	Event *ev;
+	Plumbmsg *psee, *pshow, *psend;
+
+	Alt a[] = {
+	[Cevent]	= {mbox.event, &ev, CHANRCV},
+	[Cseemail]	= {mbox.see, &psee, CHANRCV},
+	[Cshowmail]	= {mbox.show, &pshow, CHANRCV},
+	[Csendmail]	= {mbox.send, &psend, CHANRCV},
+	[Nchan]		= {nil,	nil, CHANEND},
+	};
+
+	threadsetname("mbox %s", mbox.path);
+	wininit(&mbox, mbox.path);
+	wintagwrite(&mbox, "Put Mail Delmesg Undelmesg Next ");
+	showlist();
+	fprint(mbox.ctl, "dump %s\n", cmd);
+	fprint(mbox.ctl, "clean\n");
+	procrfork(eventread, nil, Stack, RFNOTEG);
+	while(1){
+		switch(alt(a)){
+		case Cevent:
+			doevent(ev);
+			free(ev);
+			break;
+		case Cseemail:
+			changemesg(psee);
+			plumbfree(psee);
+			break;
+		case Cshowmail:
+			viewmesg(pshow);
+			plumbfree(pshow);
+			break;
+		case Csendmail:
+			compose(psend->data, nil, 0);
+			plumbfree(psend);
+			break;
+		}
+	}
+}
+
+static void
+usage(void)
+{
+	fprint(2, "usage: %s [-T] [-m mailfs] [-s] [-f format] [mbox]\n", argv0);
+	exits("usage");
+}
+
+void
+threadmain(int argc, char **argv)
+{
+	Fmt fmt;
+	char *cmd;
+	int i;
+
+	mbox.view = Vgroup;
+	doquote = needsrcquote;
+	quotefmtinstall();
+	tmfmtinstall();
+
+	fmtstrinit(&fmt);
+	for(i = 0; i < argc; i++)
+		fmtprint(&fmt, "%q ", argv[i]);
+	cmd = fmtstrflush(&fmt);
+	if(cmd == nil)
+		sysfatal("out of memory");
+
+	ARGBEGIN{
+	case 'm':
+		maildir = EARGF(usage());
+		break;
+	case 'T':
+		mbox.view = Vflat;
+		break;
+	case 's':
+		sender++;
+		break;
+	case 'f':
+		listfmt = EARGF(usage());
+		break;
+	case 'O':
+		savebox = nil;
+		break;
+	case 'o':
+		savebox = EARGF(usage());
+		break;
+	default:
+		usage();
+		break;
+	}ARGEND;
+
+	if(argc > 1)
+		usage();
+	if(argc == 1)
+		mailbox = argv[0];
+
+	mesgpat = regcomp("([0-9]+)(/.*)?");
+	cwait = threadwaitchan();
+
+	/* open these early so we won't miss messages while loading */
+	mbox.event = chancreate(sizeof(Event*), 0);
+	mbox.see = chancreate(sizeof(Plumbmsg*), 0);
+	mbox.show = chancreate(sizeof(Plumbmsg*), 0);
+	mbox.send = chancreate(sizeof(Plumbmsg*), 0);
+
+	plumbsendfd = plumbopen("send", OWRITE|OCEXEC);
+	plumbseemailfd = plumbopen("seemail", OREAD|OCEXEC);
+	plumbshowmailfd = plumbopen("showmail", OREAD|OCEXEC);
+
+	mbload();
+	procrfork(plumbseemail, nil, Stack, RFNOTEG);
+	procrfork(plumbshowmail, nil, Stack, RFNOTEG);
+
+	/* avoid duplicate sends when multiple mailboxes are open */
+	if(sender || strcmp(mailbox, "mbox") == 0){
+		plumbsendmailfd = plumbopen("sendmail", OREAD|OCEXEC);
+		procrfork(plumbsendmail, nil, Stack, RFNOTEG);
+	}
+	threadcreate(execlog, nil, Stack);
+	threadcreate(mbmain, cmd, Stack);
+	threadexits(nil);
+}
--- a/sys/src/cmd/upas/Mail/mesg.c
+++ b/sys/src/cmd/upas/Mail/mesg.c
@@ -2,80 +2,53 @@
 #include <libc.h>
 #include <bio.h>
 #include <thread.h>
-#include <ctype.h>
-#include <plumb.h>
-#include "dat.h"
+#include <regexp.h>
 
-enum
-{
-	DIRCHUNK = 32*sizeof(Dir)
-};
+#include "mail.h"
 
-char	regexchars[] = "\\/[].+?()*^$";
-char	deleted[] = "(deleted)-";
-char	deletedrx[] = "\\(deleted\\)-";
-char	deletedrx01[] = "(\\(deleted\\)-)?";
-char	deletedaddr[] = "-#0;/^\\(deleted\\)-/";
+#define Datefmt		"?WWW, ?MMM ?DD hh:mm:ss ?Z YYYY"
 
-struct{
-	char	*type;
-	char	*port;
-	char *suffix;
-} ports[] = {
-	"text/",				"edit",	".txt", /* must be first for plumbport() */
-	/* text must be first for plumbport() */
-	"image/gif",			"image",	".gif",
-	"image/jpeg",			"image",	".jpg",
-	"image/jpeg",			"image",	".jpeg",
-	"image/png",			"image",	".png",
-	"image/tiff",			"image",	".tif",
-	"application/postscript",	"postscript",	".ps",
-	"application/pdf",	"postscript",	".pdf",
-	"application/msword",	"msword",	".doc",
-	"application/rtf",	"msword",	".rtf",
-	"audio/x-wav",			"wav",		".wav",
-	nil,	nil
-};
+typedef struct Fn	Fn;
 
-char *goodtypes[] = {
-	"text",
-	"text/plain",
-	"message/rfc822",
-	"text/richtext",
-	"text/tab-separated-values",
-	"application/octet-stream",
-	nil,
+struct Fn {
+	char *name;
+	void (*fn)(Mesg *, char **, int);
 };
 
-struct{
-	char *type;
-	char	*ext;
-} exts[] = {
-	"image/gif",	".gif",
-	"image/jpeg",	".jpg",
-	nil, nil
-};
-
-char *okheaders[] =
+void
+mesgclear(Mesg *m)
 {
-	"From:",
-	"Date:",
-	"To:",
-	"CC:",
-	"Subject:",
-	nil
-};
+	int i;
 
-char *extraheaders[] =
+	for(i = 0; i < m->nparts; i++)
+		mesgclear(m->parts[i]);
+	free(m->name);
+	free(m->from);
+	free(m->to);
+	free(m->cc);
+	free(m->replyto);
+	free(m->date);
+	free(m->subject);
+	free(m->type);
+	free(m->disposition);
+	free(m->messageid);
+	free(m->filename);
+	free(m->digest);
+	free(m->mflags);
+	free(m->fromcolon);
+}
+
+void
+mesgfree(Mesg *m)
 {
-	"Resent-From:",
-	"Resent-To:",
-	"Sort:",
-	nil,
-};
+	if(m == nil)
+		return;
+	mesgclear(m);
+	free(m);
+}
 
-char*
-line(char *data, char **pp)
+static char*
+line(char *data, char **pp, int z)
 {
 	char *p, *q;
 
@@ -85,1347 +58,488 @@
 		*pp = p+1;
 	else
 		*pp = p;
+	if(z && p == data)
+		return nil;
 	q = emalloc(p-data + 1);
 	memmove(q, data, p-data);
 	return q;
 }
 
-char*
-fc(Message *m, char *s)
+static char*
+fc(Mesg *m, char *s)
 {
 	char *r;
 
-	if(*s && *m->from){
+	if(s != nil && strlen(m->from) != 0){
 		r = smprint("%s <%s>", s, m->from);
 		free(s);
 		return r;
-	}else if(*s)
-		return s;
-	else if(*m->from)
+	}
+	if(m->from != nil)
 		return estrdup(m->from);
+	if(s != nil)
+		return s;
 	return estrdup("??");
 }
 
-int
-loadinfo(Message *m, char *dir)
+Mesg*
+mesgload(char *name)
 {
-	int n;
-	char *data, *p;
+	char *info, *p;
+	int ninfo;
+	Mesg *m;
+	Tm tm;
 
-	data = readfile(dir, "info", &n);
-	if(data == nil)
-		return 0;
-	m->from = line(data, &p);
-	m->to = line(p, &p);
-	m->cc = line(p, &p);
-	m->replyto = line(p, &p);
-	m->date = line(p, &p);
-	m->subject = line(p, &p);
-	m->type = line(p, &p);
-	m->disposition = line(p, &p);
-	m->filename = line(p, &p);
-	m->digest = line(p, &p);
-	/* m->bcc = */ free(line(p, &p));
-	/* m->inreplyto = */ free(line(p, &p));
-	/* m->date = */ free(line(p, &p));
-	/* m->sender = */ free(line(p, &p));
-	/* m->messageid = */ free(line(p, &p));
-	/* m->lines = */ free(line(p, &p));
-	/* m->size = */ free(line(p, &p));
-	m->flags = line(p, &p);
-	/* m->fileid = */ free(line(p, &p));
-	m->fromcolon = fc(m, line(p, &p));
-
-	free(data);
-	return 1;
-}
-
-int
-isnumeric(char *s)
-{
-	while(*s){
-		if(!isdigit(*s))
-			return 0;
-		s++;
+	m = emalloc(sizeof(Mesg));
+	m->name = estrjoin(name, "/", nil);
+	if((info = rslurp(m, "info", &ninfo)) == nil){
+		free(m->name);
+		free(m);
+		return nil;
 	}
-	return 1;
-}
 
-Dir*
-loaddir(char *name, int *np)
-{
-	int fd;
-	Dir *dp;
+	p = info;
+	m->from = line(p, &p, 0);
+	m->to = line(p, &p, 0);
+	m->cc = line(p, &p, 0);
+	m->replyto = line(p, &p, 1);
+	m->date = line(p, &p, 0);
+	m->subject = line(p, &p, 0);
+	m->type = line(p, &p, 1);
+	m->disposition = line(p, &p, 1);
+	m->filename = line(p, &p, 1);
+	m->digest = line(p, &p, 1);
+	/* m->bcc = */ free(line(p, &p, 1));
+	m->inreplyto = line(p, &p, 1);
+	/* m->date = */ free(line(p, &p, 1));
+	/* m->sender = */ free(line(p, &p, 1));
+	m->messageid = line(p, &p, 0);
+	/* m->lines = */ free(line(p, &p, 1));
+	/* m->size = */ free(line(p, &p, 1));
+	m->mflags = line(p, &p, 0);
+	/* m->fileid = */ free(line(p, &p, 1));
+	m->fromcolon = fc(m, line(p, &p, 1));
+	free(info);
 
-	fd = open(name, OREAD);
-	if(fd < 0)
-		return nil;
-	*np = dirreadall(fd, &dp);
-	close(fd);
-	return dp;
-}
+	m->flags = 0;
+	if(strchr(m->mflags, 'd')) m->flags |= Fdel;
+	if(strchr(m->mflags, 's')) m->flags |= Fseen;
+	if(strchr(m->mflags, 'a')) m->flags |= Fresp;
 
-void
-readmbox(Message *mbox, char *dir, char *subdir)
-{
-	char *name;
-	Dir *d, *dirp;
-	int i, n;
-
-	name = estrstrdup(dir, subdir);
-	dirp = loaddir(name, &n);
-	mbox->recursed = 1;
-	if(dirp)
-		for(i=0; i<n; i++){
-			d = &dirp[i];
-			if(isnumeric(d->name))
-				mesgadd(mbox, name, d, nil);
-		}
-	free(dirp);
-	free(name);
+	m->time = time(nil);
+	if(tmparse(&tm, Datefmt, m->date, nil, nil) != nil)
+		m->time = tmnorm(&tm);
+	m->hash = 0;
+	if(m->messageid != nil)
+		m->hash = strhash(m->messageid);
+	return m;
 }
 
-/* add message to box, in increasing numerical order */
-int
-mesgadd(Message *mbox, char *dir, Dir *d, char *digest)
+static Mesg*
+readparts(Mesg *m)
 {
-	Message *m;
-	char *name;
-	int loaded;
+	char *dpath, *apath;
+	int n, i, dfd;
+	Mesg *a, *sub;
+	Dir *d;
 
-	m = emalloc(sizeof(Message));
-	m->name = estrstrdup(d->name, "/");
-	m->next = nil;
-	m->prev = mbox->tail;
-	m->level= mbox->level+1;
-	m->recursed = 0;
-	name = estrstrdup(dir, m->name);
-	loaded = loadinfo(m, name);
-	free(name);
-	/* if two upas/fs are running, we can get misled, so check digest before accepting message */
-	if(loaded==0 || (digest!=nil && m->digest!=nil && strcmp(digest, m->digest)!=0)){
-		mesgfreeparts(m);
-		free(m);
-		return 0;
-	}
-	if(mbox->tail != nil)
-		mbox->tail->next = m;
-	mbox->tail = m;
-	if(mbox->head == nil)
-		mbox->head = m;
+	if(m->body != nil)
+		return m->body;
 
-	if (m->level != 1){
-		m->recursed = 1;
-		readmbox(m, dir, m->name); 
-	}
-	return 1;
-}
+	dpath = estrjoin(mbox.path, m->name, nil);
+	dfd = open(dpath, OREAD);
+	free(dpath);
+	if(dfd == -1)
+		return m;
 
-int
-thisyear(char *year)
-{
-	Tzone *tz;
-	Tm tm;
+	n = dirreadall(dfd, &d);
+	close(dfd);
+	if(n == -1)
+		sysfatal("%s read: %r", mbox.path);
 
-	/* ignore errors: screwed means utc */
-	tz = tzload("local");
-	tmnow(&tm, tz);
-	return atoi(year) == (tm.year + 1900);
-}
+	m->body = nil;
+	for(i = 0; i < n; i++){
+		if(d[i].qid.type != QTDIR)
+			continue;
 
-char*
-stripdate(char *as)
-{
-	int n;
-	char *s, *fld[10];
-
-	as = estrdup(as);
-	s = estrdup(as);
-	n = tokenize(s, fld, 10);
-	if(n > 5){
-		sprint(as, "%.3s ", fld[0]);	/* day */
-		/* some dates have 19 Apr, some Apr 19 */
-		if(strlen(fld[1])<4 && isnumeric(fld[1]))
-			sprint(as+strlen(as), "%.3s %.3s ", fld[1], fld[2]);	/* date, month */
-		else
-			sprint(as+strlen(as), "%.3s %.3s ", fld[2], fld[1]);	/* date, month */
-		/* do we use time or year?  depends on whether year matches this one */
-		if(thisyear(fld[5])){
-			if(strchr(fld[3], ':') != nil)
-				sprint(as+strlen(as), "%.5s ", fld[3]);	/* time */
-			else if(strchr(fld[4], ':') != nil)
-				sprint(as+strlen(as), "%.5s ", fld[4]);	/* time */
-		}else
-			sprint(as+strlen(as), "%.4s ", fld[5]);	/* year */
+		apath = estrjoin(m->name, d[i].name, nil);
+		a = mesgload(apath);
+		free(apath);
+		if(a == nil)
+			continue;
+		if(strncmp(a->type, "multipart/", strlen("multipart/")) == 0){
+			sub = readparts(a);
+			if(sub != a)
+				m->body = sub;
+			continue;
+		} 
+		if(m->nparts >= m->xparts)
+			m->parts = erealloc(m->parts, (2 + m->nparts*2)*sizeof(Mesg*));
+		m->parts[m->nparts++] = a;
+		if(m->body == nil && strcmp(a->type, "text/plain") == 0)
+			m->body = a;
+		else if(m->body == nil && strcmp(a->type, "text/html") == 0)
+			m->body = a;
 	}
-	free(s);
-	return as;
+	free(d);
+	if(m->body == nil)
+		m->body = m;
+	return m->body;
 }
 
-char*
-readfile(char *dir, char *name, int *np)
+static void
+execfmt(void *pm)
 {
-	char *file, *data;
-	int fd, len;
-	Dir *d;
+	Mesg *m;
 
-	if(np != nil)
-		*np = 0;
-	file = estrstrdup(dir, name);
-	fd = open(file, OREAD);
-	if(fd < 0)
-		return nil;
-	d = dirfstat(fd);
-	free(file);
-	len = 0;
-	if(d != nil)
-		len = d->length;
-	free(d);
-	data = emalloc(len+1);
-	read(fd, data, len);
-	close(fd);
-	if(np != nil)
-		*np = len;
-	return data;
+	m = pm;
+	rfork(RFFDG);
+	dup(m->fd[1], 1);
+	close(m->fd[0]);
+	close(m->fd[1]);
+	procexecl(m->sync, "/bin/htmlfmt", "htmlfmt", "-a", "-cutf-8", m->path, nil);
 }
 
-int
-writefile(char *dir, char *name, char *s)
+static int
+htmlfmt(Mesg *m, char *path)
 {
-	char *e, *file;
-	int fd, n;
-
-	file = estrstrdup(dir, name);
-//	fprint(2, "writefile %s [%s]\n", file, s);
-	fd = open(file, OWRITE);
-	if(fd < 0)
-		return -1;
-	for(e = s + strlen(s); e - s > 0; s += n)
-		if((n = write(fd, s, e - s)) <= 0)
-			break;
-	close(fd);
-	return s == e? 0: -1;
+	if(pipe(m->fd) == -1)
+		sysfatal("pipe: %r");
+	m->sync = chancreate(sizeof(ulong), 0);
+	m->path = path;
+	procrfork(execfmt, m, Stack, RFNOTEG);
+	recvul(m->sync);
+	chanfree(m->sync);
+	close(m->fd[1]);
+	return m->fd[0];
 }
 
-
-void
-setflags(Message *m, char *f)
+static void
+copy(Biobuf *wfd, Biobuf *rfd)
 {
-	char *flgchar = "aDdfrsS";
-	char *t, *p;
-	int rm;
+	char *buf;
+	int n;
 
-	t = smprint("%s/%s", mbox.name, m->name);
-	writefile(t, "flags", f);
-	free(t);
-	for(; *f; f++){
-		rm = 0;
-		if(*f == '-'){
-			rm = 1;
-			f++;
-		}
-		if((p = strchr(flgchar, *f)) != nil)
-			m->flags[p - flgchar] = rm ? '-' : *f;
-	}		
+	buf = emalloc(Bufsz);
+	while(1){
+		n = Bread(rfd, buf, Bufsz);
+		if(n <= 0)
+			break;
+		if(Bwrite(wfd, buf, n) != n)
+			break;
+	}
+	free(buf);
 }
 
-void
-fmtflags(char *b, char *flg)
+static int
+mesgshow(Mesg *m)
 {
-	*b++ = '[';
-	*b++ = (strchr(flg, 's') == nil) ? '*' : ' ';	/* unread */
-	*b++ = (strchr(flg, 'a') == nil) ? ' ' : 'R';	/* answered */
-	*b++ = ']';
-	*b = '\0';
-}
+	char *path, *home, *name, *suff;
+	Biobuf *rfd, *wfd;
+	Mesg *a;
+	int i;
 
-char*
-info(Message *m, int ind, int ogf)
-{
-	char *i;
-	int j, len, lens;
-	char *p;
-	char fmt[80], s[80], flg[16];
+	if((wfd = bwinopen(m, "body", OWRITE)) == nil)
+		return -1;
+	if(m->parent != nil || m->nchild != 0) {
+		Bprint(wfd, "Thread:");
+		if(m->parent && !(m->parent->state & Sdummy))
+			Bprint(wfd, " ↑ %s", m->parent->name);
+		for(i = 0; i < m->nchild; i++)
+			Bprint(wfd, " ↓ %s", m->child[i]->name);
+		Bprint(wfd, "\n");
+	}
+	Bprint(wfd, "From: %s\n", m->fromcolon);
+	Bprint(wfd, "To:   %s\n", m->to);
+	Bprint(wfd, "Date: %s\n", m->date);
+	Bprint(wfd, "Subject: %s\n\n", m->subject);
 
-	if (ogf)
-		p=m->to;
-	else
-		p=m->fromcolon;
-
-	fmtflags(flg, m->flags);
-	if(ind==0 && altmenu){
-		len = 12;
-		lens = 20;
-
-		if(ind==0 && m->subject[0]=='\0'){
-			snprint(fmt, sizeof fmt,
-				"\t%%-%d.%ds\t%%-12.12s\t", len, len);
-			snprint(s, sizeof s, fmt, p, stripdate(m->date) + 4);
-		}else{
-			snprint(fmt, sizeof fmt,
-				"\t%%-%d.%ds\t%%-12.12s\t%%-%d.%ds", len, len, lens, lens);
-			snprint(s, sizeof s, fmt, p, stripdate(m->date) + 4, m->subject);
-		}
-		i = estrdup(s);
-
-		return i;
+	rfd = mesgopenbody(m);
+	if(rfd != nil){
+		copy(wfd, rfd);
+		Bterm(rfd);
 	}
 
-	if(ind==0 && shortmenu){
-		len = 30;
-		lens = 30;
-		if(shortmenu > 1){
-			len = 10;
-			lens = 25;
+	home = getenv("home");
+	if(m->nparts != 0)
+		Bprint(wfd, "\n");
+	for(i = 0; i < m->nparts; i++){
+		a = m->parts[i];
+		name = a->name;
+		if(strncmp(a->name, m->name, strlen(m->name)) == 0)
+			name += strlen(m->name);
+		if(a->disposition != nil
+		&& strcmp(a->disposition, "inline") == 0
+		&& strcmp(a->type, "text/plain") == 0){
+			if(a == m || a == m->body)
+				continue;
+			Bprint(wfd, "\n===> %s (%s)\n", name, a->type);
+			path = estrjoin(mbox.path, a->name, "body", nil);
+			if((rfd = Bopen(path, OREAD)) != nil){
+				copy(wfd, rfd);
+				Bterm(rfd);
+			}
+			free(path);
+			continue;
 		}
-		if(ind==0 && m->subject[0]=='\0'){
-			snprint(fmt, sizeof fmt, " %%-%d.%ds", len, len);
-			snprint(s, sizeof s, fmt, p);
-		}else{
-			snprint(fmt, sizeof fmt, " %%-%d.%ds  %%-%d.%ds", len, len, lens, lens);
-			snprint(s, sizeof s, fmt, p, m->subject);
-		}
-		i = estrdup(s);
-
-		return i;
-	} 
-
-	i = estrdup("");
-	i = eappend(i, " ", flg);
-	i = eappend(i, "\t", p);
-	i = egrow(i, "\t", stripdate(m->date));
-	if(ind == 0){
-		if(strcmp(m->type, "text")!=0 && strncmp(m->type, "text/", 5)!=0 && 
-		   strncmp(m->type, "multipart/", 10)!=0)
-			i = egrow(i, "\t(", estrstrdup(m->type, ")"));
-	}else if(strncmp(m->type, "multipart/", 10) != 0)
-		i = egrow(i, "\t(", estrstrdup(m->type, ")"));
-	if(m->subject[0] != '\0'){
-		i = eappend(i, "\n", nil);
-		for(j=0; j<ind; j++)
-			i = eappend(i, "\t", nil);
-		i = eappend(i, "\t", m->subject);
+		Bprint(wfd, "\n===> %s (%s)\n", name, a->type);
+		name = a->filename;
+		if(name == nil)
+			name = "body";
+		if((suff = strchr(name, '.')) == nil)
+			suff = "";
+		Bprint(wfd, "\tcp %s%sbody%s %s/%s\n", mbox.path, a->name, suff, home, name);
+		continue;
 	}
-	return i;
+	Bterm(wfd);
+	free(home);
+	fprint(m->ctl, "clean\n");
+	return 0;
 }
 
-void
-mesgmenu0(Window *w, Message *mbox, char *realdir, char *dir, int ind, Biobuf *fd, int onlyone, int dotail)
+static void
+reply(Mesg *m, char **f, int nf)
 {
-	int i;
-	Message *m;
-	char *name, *tmp;
-	int ogf=0;
-
-	if(strstr(realdir, "outgoing") != nil)
-		ogf=1;
-
-	/* show mail box in reverse order, pieces in forward order */
-	if(ind > 0)
-		m = mbox->head;
+	if(nf >= 1 &&  strcmp(f[0], "all") != 0)
+		compose(m->replyto, m, 1);
 	else
-		m = mbox->tail;
-	while(m != nil){
-		for(i=0; i<ind; i++)
-			Bprint(fd, "\t");
-		if(ind != 0)
-			Bprint(fd, "  ");
-		name = estrstrdup(dir, m->name);
-		tmp = info(m, ind, ogf);
-		Bprint(fd, "%s%s\n", name, tmp);
-		free(tmp);
-		if(dotail && m->tail)
-			mesgmenu0(w, m, realdir, name, ind+1, fd, 0, dotail);
-		free(name);
-		if(ind)
-			m = m->next;
-		else
-			m = m->prev;
-		if(onlyone)
-			m = nil;
-	}
+		compose(m->replyto, m, 0);
 }
 
-void
-mesgmenu(Window *w, Message *mbox)
+static void
+delmesg(Mesg *m, char **, int nf)
 {
-	winopenbody(w, OWRITE);
-	mesgmenu0(w, mbox, mbox->name, "", 0, w->body, 0, !shortmenu);
-	winclosebody(w);
-}
-
-/* one new message has arrived, as mbox->tail */
-void
-mesgmenunew(Window *w, Message *mbox)
-{
-	Biobuf *b;
-
-	winselect(w, "0", 0);
-	w->data = winopenfile(w, "data");
-	b = emalloc(sizeof(Biobuf));
-	Binit(b, w->data, OWRITE);
-	mesgmenu0(w, mbox, mbox->name, "", 0, b, 1, !shortmenu);
-	Bterm(b);
-	free(b);
-	if(!mbox->dirty)
-		winclean(w);
-	/* select tag line plus following indented lines, but not final newline (it's distinctive) */
-	winselect(w, "0/.*\\n((\t.*\\n)*\t.*)?/", 1);
-	close(w->addr);
-	close(w->data);
-	w->addr = -1;
-	w->data = -1;
-}
-
-char*
-name2regexp(char *prefix, char *s)
-{
-	char *buf, *p, *q;
-
-	buf = emalloc(strlen(prefix)+2*strlen(s)+50);	/* leave room to append more */
-	p = buf;
-	*p++ = '0';
-	*p++ = '/';
-	*p++ = '^';
-	strcpy(p, prefix);
-	p += strlen(prefix);
-	for(q=s; *q!='\0'; q++){
-		if(strchr(regexchars, *q) != nil)
-			*p++ = '\\';
-		*p++ = *q;
+	if(nf != 0){
+		fprint(2, "Delmesg: too many args\n");
+		return;
 	}
-	*p++ = '/';
-	*p = '\0';
-	return buf;
+	m->flags |= Ftodel;
+	m->quitting = 1;
+	mbredraw(m, 0, 0);
 }
 
-void
-mesgmenumarkdel(Window *w, Message *mbox, Message *m, int writeback)
+static void
+markone(Mesg *m, char **f, int nf)
 {
-	char *buf;
+	int add, flg, fd;
+	char *path;
 
-
-	if(m->deleted)
+	if(nf != 1){
+		fprint(2, "Mark: invalid arguments");
 		return;
-	m->writebackdel = writeback;
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
-	buf = name2regexp("", m->name);
-	strcat(buf, "-#0");
-	if(winselect(w, buf, 1))
-		write(w->data, deleted, 10);
-	free(buf);
-	close(w->data);
-	close(w->addr);
-	w->addr = w->data = -1;
-	mbox->dirty = 1;
-	m->deleted = 1;
-}
+	}
 
-void
-mesgmenumarkundel(Window *w, Message*, Message *m)
-{
-	char *buf;
-
-	if(m->deleted == 0)
+	if((flg = mesgflagparse(f[0], &add)) == -1){
+		fprint(2, "Mark: invalid flags %s\n", f[0]);
 		return;
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
-	buf = name2regexp(deletedrx, m->name);
-	if(winselect(w, buf, 1))
-		if(winsetaddr(w, deletedaddr, 1))
-			write(w->data, "", 0);
-	free(buf);
-	close(w->data);
-	close(w->addr);
-	w->addr = w->data = -1;
-	m->deleted = 0;
-}
-
-void
-mesgmenudel(Window *w, Message *mbox, Message *m)
-{
-	char *buf;
-
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
-	buf = name2regexp(deletedrx, m->name);
-	if(winsetaddr(w, buf, 1) && winsetaddr(w, ".,./.*\\n(\t.*\\n)*/", 1))
-		write(w->data, "", 0);
-	free(buf);
-	close(w->data);
-	close(w->addr);
-	w->addr = w->data = -1;
-	mbox->dirty = 1;
-	m->deleted = 1;
-}
-
-void
-mesgmenureflag(Window *w, Message *m)
-{
-	char *buf, flg[16];
-
-	fmtflags(flg, m->flags);
-	buf = name2regexp(deletedrx01, m->name);
-	strcat(buf, "+/\\[[^\\]]*\\]/");
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
-	if(winselect(w, buf, 1))
-		write(w->data, flg, strlen(flg));
-	free(buf);
-
-	close(w->data);
-	w->data = -1;
-}
-
-void
-mesgmenumark(Window *w, char *which, char *mark)
-{
-	char *buf;
-
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
-	buf = name2regexp(deletedrx01, which);
-	if(winsetaddr(w, buf, 1) && winsetaddr(w, "+0-#1", 1))	/* go to end of line */
-		write(w->data, mark, strlen(mark));
-	free(buf);
-	close(w->data);
-	close(w->addr);
-	w->addr = w->data = -1;
-	if(!mbox.dirty)
-		winclean(w);
-}
-
-void
-mesgfreeparts(Message *m)
-{
-	free(m->name);
-	free(m->replyname);
-	free(m->fromcolon);
-	free(m->from);
-	free(m->to);
-	free(m->cc);
-	free(m->replyto);
-	free(m->date);
-	free(m->subject);
-	free(m->type);
-	free(m->disposition);
-	free(m->filename);
-	free(m->flags);
-	free(m->digest);
-}
-
-void
-mesgdel(Message *mbox, Message *m)
-{
-	Message *n, *next;
-
-	if(m->opened)
-		error("internal error: deleted message still open in mesgdel");
-	/* delete subparts */
-	for(n=m->head; n!=nil; n=next){
-		next = n->next;
-		mesgdel(m, n);
 	}
-	/* remove this message from list */
-	if(m->next)
-		m->next->prev = m->prev;
+	if(add)
+		m->flags |= flg;
 	else
-		mbox->tail = m->prev;
-	if(m->prev)
-		m->prev->next = m->next;
-	else
-		mbox->head = m->next;
-
-	mesgfreeparts(m);
-}
-
-int
-deliver(char *folder, char *file)
-{
-	char *av[4];
-	int pid, wpid, nz;
-	Waitmsg *w;
-
-	pid = fork();
-	switch(pid){
-	case -1:
-		return -1;
-	case 0:
-		av[0] = "mbappend";
-		av[1] = folder;
-		av[2] = file;
-		av[3] = 0;
-		exec("/bin/upas/mbappend", av);
-		_exits("b0rked");
-		return -1;
-	default:
-		while(w = wait()){
-			nz = !w->msg || !w->msg[0];
-			if(!nz)
-				werrstr("%s", w->msg);
-			wpid = w->pid;
-			free(w);
-			if(wpid == pid)
-				return nz? 0: -1;
+		m->flags &= ~flg;
+	if(strlen(f[0]) != 0){
+		path = estrjoin(mbox.path, "/", m->name, "/flags", nil);
+		if((fd = open(path, OWRITE)) != -1){
+			fprint(fd, f[0]);
+			close(fd);
 		}
-		return -1;
+		free(path);
 	}
+	mbredraw(m, 0, 0);
 }
 
-int
-mesgsave(Message *m, char *s)
-{
-	char *t;
-	int ret;
 
-	t = smprint("%s/%s/rawunix", mbox.name, m->name);
-	if(s[0] != '/')
-		s = estrdup(s);
-	else
-		s = smprint("%s/%s", mailboxdir, s);
-	ret = 1;
-	if(deliver(s, t) == -1){
-		fprint(2, "Mail: save failed: can't write %s: %r\n", s);
-		ret = 0;
-	}
-	setflags(m, "S");
-	free(s);
-	free(t);
-	return ret;
-}
-
-int
-mesgcommand(Message *m, char *cmd)
+static void
+mesgquit(Mesg *m, char **, int)
 {
-	char *s;
-	char *args[10];
-	int ok, ret, nargs;
-
-	s = cmd;
-	ret = 1;
-	nargs = tokenize(s, args, nelem(args));
-	if(nargs == 0)
-		return 0;
-	if(strcmp(args[0], "Post") == 0){
-		mesgsend(m);
-		goto Return;
-	}
-	if(strncmp(args[0], "Save", 4) == 0){
-		if(m->isreply)
-			goto Return;
-		s = estrdup("\t[saved");
-		if(nargs==1 || strcmp(args[1], "")==0){
-			ok = mesgsave(m, "stored");
-		}else{
-			ok = mesgsave(m, args[1]);
-			s = eappend(s, " ", args[1]);
-		}
-		if(ok){
-			s = egrow(s, "]", nil);
-			mesgmenumark(mbox.w, m->name, s);
-		}
-		free(s);
-		setflags(m, "S");
-		goto Return;
-	}
-	if(strcmp(args[0], "Reply")==0){
-		if(nargs>=2 && strcmp(args[1], "all")==0)
-			mkreply(m, "Replyall", nil, nil, nil);
-		else
-			mkreply(m, "Reply", nil, nil, nil);
-		goto Return;
-	}
-	if(strcmp(args[0], "Q") == 0){
-		s = winselection(m->w);	/* will be freed by mkreply */
-		if(nargs>=3 && strcmp(args[1], "Reply")==0 && strcmp(args[2], "all")==0)
-			mkreply(m, "QReplyall", nil, nil, s);
-		else
-			mkreply(m, "QReply", nil, nil, s);
-		goto Return;
-	}
-	if(strcmp(args[0], "Del") == 0){
-		if(windel(m->w, 0)){
-			chanfree(m->w->cevent);
-			free(m->w);
-			m->w = nil;
-			if(m->isreply)
-				delreply(m);
-			else{
-				m->opened = 0;
-				m->tagposted = 0;
-			}
-			free(cmd);
-			threadexits(nil);
-		}
-		goto Return;
-	}
-	if(strcmp(args[0], "Delmesg") == 0){
-		if(!m->isreply){
-			mesgmenumarkdel(wbox, &mbox, m, 1);
-			free(cmd);	/* mesgcommand might not return */
-			mesgcommand(m, estrdup("Del"));
-			return 1;
-		}
-//		setflags(m, "d");
-		goto Return;
-	}
-	if(strcmp(args[0], "UnDelmesg") == 0){
-		if(!m->isreply && m->deleted)
-			mesgmenumarkundel(wbox, &mbox, m);
-//		setflags(m, "-d");
-		goto Return;
-	}
-//	if(strcmp(args[0], "Headers") == 0){
-//		m->showheaders();
-//		return True;
-//	}
-
-	ret = 0;
-
-    Return:
-	free(cmd);
-	return ret;
-}
-
-void
-mesgtagpost(Message *m)
-{
-	if(m->tagposted)
+	if(fprint(m->ctl, "del\n") == -1)
 		return;
-	wintagwrite(m->w, " Post", 5);
-	m->tagposted = 1;
+	m->quitting = 1;
+	m->open = 0;
 }
 
-/* need to expand selection more than default word */
-#pragma varargck argpos eval 2
+static Fn mesgfn[] = {
+	{"Reply",	reply},
+	{"Delmesg",	delmesg},
+	{"Del", 	mesgquit},
+	{"Mark",	markone},
+#ifdef NOTYET
+	{"Save",	nil},
+#endif
+	{nil}
+};
 
-long
-eval(Window *w, char *s, ...)
+static void
+mesgmain(void *mp)
 {
-	char buf[64];
-	va_list arg;
+	char *path, *f[32];
+	Event ev;
+	Mesg *m, **pm;
+	Fn *p;
+	int nf;
 
-	va_start(arg, s);
-	vsnprint(buf, sizeof buf, s, arg);
-	va_end(arg);
+	m = mp;
+	m->quitting = 0;
+	m->qnext = mbox.openmesg;
+	mbox.openmesg = m;
 
-	if(winsetaddr(w, buf, 1)==0)
-		return -1;
+	path = estrjoin(mbox.path, m->name, nil);
+	wininit(m, path);
+	free(path);
 
-	if(pread(w->addr, buf, 24, 0) != 24)
-		return -1;
-	return strtol(buf, 0, 10);
-}
-
-int
-isemail(char *s)
-{
-	int nat;
-
-	nat = 0;
-	for(; *s; s++)
-		if(*s == '@')
-			nat++;
-		else if(!isalpha(*s) && !isdigit(*s) && !strchr("_.-+/", *s))
-			return 0;
-	return nat==1;
-}
-
-char addrdelim[] =  "/[ \t\\n<>()\\[\\]]/";
-char*
-expandaddr(Window *w, Event *e)
-{
-	char *s;
-	long q0, q1;
-
-	if(e->q0 != e->q1)	/* cannot happen */
-		return nil;
-
-	q0 = eval(w, "#%d-%s", e->q0, addrdelim);
-	if(q0 == -1)	/* bad char not found */
-		q0 = 0;
-	else			/* increment past bad char */
-		q0++;
-
-	q1 = eval(w, "#%d+%s", e->q0, addrdelim);
-	if(q1 < 0){
-		q1 = eval(w, "$");
-		if(q1 < 0)
-			return nil;
-	}
-	if(q0 >= q1)
-		return nil;
-	s = emalloc((q1-q0)*UTFmax+1);
-	winread(w, q0, q1, s);
-	return s;
-}
-
-int
-replytoaddr(Window *w, Message *m, Event *e, char *s)
-{
-	int did;
-	char *buf;
-	Plumbmsg *pm;
-
-	buf = nil;
-	did = 0;
-	if(e->flag & 2){
-		/* autoexpanded; use our own bigger expansion */
-		buf = expandaddr(w, e);
-		if(buf == nil)
-			return 0;
-		s = buf;
-	}
-	if(isemail(s)){
-		did = 1;
-		pm = emalloc(sizeof(Plumbmsg));
-		pm->src = estrdup("Mail");
-		pm->dst = estrdup("sendmail");
-		pm->data = estrdup(s);
-		pm->ndata = -1;
-		if(m->subject && m->subject[0]){
-			pm->attr = emalloc(sizeof(Plumbattr));
-			pm->attr->name = estrdup("Subject");
-			if(tolower(m->subject[0]) != 'r' || tolower(m->subject[1]) != 'e' || m->subject[2] != ':')
-				pm->attr->value = estrstrdup("Re: ", m->subject);
+	wintagwrite(m, "Reply all Delmesg Save  ");
+	mesgshow(m);
+	fprint(m->ctl, "clean\n");
+	mbox.nopen++;
+	while(!m->quitting){
+		if(winevent(m, &ev) != 'M')
+			continue;
+		if(strcmp(ev.text, "Del") == 0)
+			break;
+		switch(ev.type){
+		case 'l':
+		case 'L':
+			if(matchmesg(m, ev.text))
+				mesgopen(ev.text, nil);
 			else
-				pm->attr->value = estrdup(m->subject);
-			pm->attr->next = nil;
-		}
-		if(plumbsend(plumbsendfd, pm) < 0)
-			fprint(2, "error writing plumb message: %r\n");
-		plumbfree(pm);
-	}
-	free(buf);
-	return did;
-}
-
-
-void
-mesgctl(void *v)
-{
-	Message *m;
-	Window *w;
-	Event *e, *eq, *e2, *ea;
-	int na, nopen, i, j;
-	char *os, *s, *t, *buf;
-
-	m = v;
-	w = m->w;
-	threadsetname("mesgctl");
-	proccreate(wineventproc, w, STACK);
-	for(;;){
-		e = recvp(w->cevent);
-		switch(e->c1){
-		default:
-		Unk:
-			print("unknown message %c%c\n", e->c1, e->c2);
+				winreturn(m, &ev);
 			break;
-
-		case 'E':	/* write to body; can't affect us */
-			break;
-
-		case 'F':	/* generated by our actions; ignore */
-			break;
-
-		case 'K':	/* type away; we don't care */
-		case 'M':
-			switch(e->c2){
-			case 'x':	/* mouse only */
-			case 'X':
-				ea = nil;
-				eq = e;
-				if(e->flag & 2){
-					e2 = recvp(w->cevent);
-					eq = e2;
+		case 'x':
+		case 'X':
+			if((nf = tokenize(ev.text, f, nelem(f))) == 0)
+				continue;
+			for(p = mesgfn; p->fn != nil; p++){
+				if(strcmp(p->name, f[0]) == 0 && p->fn != nil){
+					p->fn(m, &f[1], nf - 1);
+					break;
 				}
-				if(e->flag & 8){
-					ea = recvp(w->cevent);
-					recvp(w->cevent);
-					na = ea->nb;
-				}else
-					na = 0;
-				if(eq->q1>eq->q0 && eq->nb==0){
-					s = emalloc((eq->q1-eq->q0)*UTFmax+1);
-					winread(w, eq->q0, eq->q1, s);
-				}else
-					s = estrdup(eq->b);
-				if(na){
-					t = emalloc(strlen(s)+1+na+1);
-					sprint(t, "%s %s", s, ea->b);
-					free(s);
-					s = t;
-				}
-				if(!mesgcommand(m, s))	/* send it back */
-					winwriteevent(w, e);
-				break;
-
-			case 'l':	/* mouse only */
-			case 'L':
-				buf = nil;
-				eq = e;
-				if(e->flag & 2){
-					e2 = recvp(w->cevent);
-					eq = e2;
-				}
-				s = eq->b;
-				if(eq->q1>eq->q0 && eq->nb==0){
-					buf = emalloc((eq->q1-eq->q0)*UTFmax+1);
-					winread(w, eq->q0, eq->q1, buf);
-					s = buf;
-				}
-				os = s;
-				nopen = 0;
-				do{
-					/* skip mail box name if present */
-					if(strncmp(s, mbox.name, strlen(mbox.name)) == 0)
-						s += strlen(mbox.name);
-					if(strstr(s, "body") != nil){
-						/* strip any known extensions */
-						for(i=0; exts[i].ext!=nil; i++){
-							j = strlen(exts[i].ext);
-							if(strlen(s)>j && strcmp(s+strlen(s)-j, exts[i].ext)==0){
-								s[strlen(s)-j] = '\0';
-								break;
-							}
-						}
-						if(strlen(s)>5 && strcmp(s+strlen(s)-5, "/body")==0)
-							s[strlen(s)-4] = '\0';	/* leave / in place */
-					}
-					nopen += mesgopen(&mbox, mbox.name, s, m, 0, nil);
-					while(*s!=0 && *s++!='\n')
-						;
-				}while(*s);
-				if(nopen == 0 && e->c1 == 'L')
-					nopen += replytoaddr(w, m, e, os);
-				if(nopen == 0)
-					winwriteevent(w, e);
-				free(buf);
-				break;
-
-			case 'I':	/* modify away; we don't care */
-			case 'D':
-				mesgtagpost(m);
-				/* fall through */
-			case 'd':
-			case 'i':
-				break;
-
-			default:
-				goto Unk;
 			}
+			if(p->fn == nil)
+				winreturn(m, &ev);
+			break;
 		}
 	}
-}
-
-void
-mesgline(Message *m, char *header, char *value)
-{
-	if(strlen(value) > 0)
-		Bprint(m->w->body, "%s: %s\n", header, value);
-}
-
-int
-isprintable(char *type)
-{
-	int i;
-
-	for(i=0; goodtypes[i]!=nil; i++)
-		if(strcmp(type, goodtypes[i])==0)
-			return 1;
-	return 0;
-}
-
-char*
-ext(char *type)
-{
-	int i;
-
-	for(i=0; exts[i].type!=nil; i++)
-		if(strcmp(type, exts[i].type)==0)
-			return exts[i].ext;
-	return "";
-}
-
-void
-mimedisplay(Message *m, char *name, char *rootdir, Window *w, int fileonly)
-{
-	char *dest, *maildest;
-
-	if(strcmp(m->disposition, "file")==0 || strlen(m->filename)!=0){
-		if(strlen(m->filename) == 0){
-			dest = estrdup(m->name);
-			dest[strlen(dest)-1] = '\0';
-		}else
-			dest = estrdup(m->filename);
-		if(maildest = getenv("maildest")){
-			maildest = eappend(maildest, "/", dest);
-			Bprint(w->body, "\tcp %s%sbody%s %q\n", rootdir, name, ext(m->type), maildest);
-			free(maildest);
+	for(pm = &mbox.openmesg; *pm != nil; pm = &(*pm)->qnext)
+		if(*pm == m){
+			*pm = m->qnext;
+			break;
 		}
-		if(m->filename[0] != '/')
-			dest = egrow(estrdup(home), "/", dest);
-		Bprint(w->body, "\tcp %s%sbody%s %q\n", rootdir, name, ext(m->type), dest);
-		free(dest);
-	}else if(!fileonly)
-		Bprint(w->body, "\tfile is %s%sbody%s\n", rootdir, name, ext(m->type));
+	mbox.nopen--;
+	m->qnext = nil;
+	m->state &= ~Sopen;
+	winclose(m);
+	threadexits(nil);
 }
 
-void
-printheader(char *dir, Biobuf *b, char **okheaders)
-{
-	char *s;
-	char *lines[100];
-	int i, j, n;
-
-	s = readfile(dir, "header", nil);
-	if(s == nil)
-		return;
-	n = getfields(s, lines, nelem(lines), 0, "\n");
-	for(i=0; i<n; i++)
-		for(j=0; okheaders[j]; j++)
-			if(cistrncmp(lines[i], okheaders[j], strlen(okheaders[j])) == 0)
-				Bprint(b, "%s\n", lines[i]);
-	free(s);
-}
-
-void
-mesgload(Message *m, char *rootdir, char *file, Window *w)
-{
-	char *s, *subdir, *name, *dir;
-	Message *mp, *thisone;
-	int n;
-
-	dir = estrstrdup(rootdir, file);
-
-	if(strcmp(m->type, "message/rfc822") != 0){	/* suppress headers of envelopes */
-		if(strlen(m->from) > 0){
-			Bprint(w->body, "From: %s\n", m->from);
-			mesgline(m, "Date", m->date);
-			mesgline(m, "To", m->to);
-			mesgline(m, "CC", m->cc);
-			mesgline(m, "Subject", m->subject);
-			printheader(dir, w->body, extraheaders);
-		}else{
-			printheader(dir, w->body, okheaders);
-			printheader(dir, w->body, extraheaders);
-		}
-		Bprint(w->body, "\n");
-	}
-
-	if(m->level == 1 && m->recursed == 0){
-		m->recursed = 1;
-		readmbox(m, rootdir, m->name);
-	}
-	if(m->head == nil){	/* single part message */
-		if(strcmp(m->type, "text")==0 || strncmp(m->type, "text/", 5)==0){
-			mimedisplay(m, m->name, rootdir, w, 1);
-			s = readbody(m->type, dir, &n);
-			winwritebody(w, s, n);
-			free(s);
-		}else
-			mimedisplay(m, m->name, rootdir, w, 0);
-	}else{
-		/* multi-part message, either multipart/* or message/rfc822 */
-		thisone = nil;
-		if(strcmp(m->type, "multipart/alternative") == 0){
-			thisone = m->head;	/* in case we can't find a good one */
-			for(mp=m->head; mp!=nil; mp=mp->next)
-				if(isprintable(mp->type)){
-					thisone = mp;
-					break;
-				}
-		}
-		for(mp=m->head; mp!=nil; mp=mp->next){
-			if(thisone!=nil && mp!=thisone)
-				continue;
-			subdir = estrstrdup(dir, mp->name);
-			name = estrstrdup(file, mp->name);
-			/* skip first element in name because it's already in window name */
-			if(mp != m->head)
-				Bprint(w->body, "\n===> %s (%s) [%s]\n", strchr(name, '/')+1, mp->type, mp->disposition);
-			if(strcmp(mp->type, "text")==0 || strncmp(mp->type, "text/", 5)==0){
-				mimedisplay(mp, name, rootdir, w, 1);
-				printheader(subdir, w->body, okheaders);
-				printheader(subdir, w->body, extraheaders);
-				winwritebody(w, "\n", 1);
-				s = readbody(mp->type, subdir, &n);
-				winwritebody(w, s, n);
-				free(s);
-			}else{
-				if(strncmp(mp->type, "multipart/", 10)==0 || strcmp(mp->type, "message/rfc822")==0){
-					mp->w = w;
-					mesgload(mp, rootdir, name, w);
-					mp->w = nil;
-				}else
-					mimedisplay(mp, name, rootdir, w, 0);
-			}
-			free(name);
-			free(subdir);
-		}
-	}
-	free(dir);
-}
-
 int
-tokenizec(char *str, char **args, int max, char *splitc)
+mesgflagparse(char *fstr, int *add)
 {
-	int na;
-	int intok = 0;
+	int flg;
 
-	if(max <= 0)
-		return 0;	
-	for(na=0; *str != '\0';str++){
-		if(strchr(splitc, *str) == nil){
-			if(intok)
-				continue;
-			args[na++] = str;
-			intok = 1;
-		}else{
-			/* it's a separator/skip character */
-			*str = '\0';
-			if(intok){
-				intok = 0;
-				if(na >= max)
-					break;
-			}
+	flg = 0;
+	*add = (*fstr == '+');
+	if(*fstr == '-' || *fstr == '+')
+		fstr++;
+	for(; *fstr; fstr++){
+		switch(*fstr){
+		case 'a':
+			flg |= Fresp;
+			break;
+		case 's':
+			flg |= Fseen;
+			break;
+		case 'D':
+			flg |= Ftodel;
+			memcpy(fstr, fstr +1, strlen(fstr));
+			break;
+		default:
+			fprint(2, "unknown flag %c", *fstr);
+			return -1;
 		}
 	}
-	return na;
+	return flg;
 }
 
-Message*
-mesglookup(Message *mbox, char *name, char *digest)
+void
+mesgpath2name(char *buf, int nbuf, char *name)
 {
+	char *p, *e;
 	int n;
-	Message *m;
-	char *t;
 
-	if(digest){
-		/* can find exactly */
-		for(m=mbox->head; m!=nil; m=m->next)
-			if(strcmp(digest, m->digest) == 0)
-				break;
-		return m;
-	}
-
-	n = strlen(name);
-	if(n == 0)
-		return nil;
-	if(name[n-1] == '/')
-		t = estrdup(name);
+	n = strlen(mbox.path);
+	if(strncmp(name, mbox.path, n) == 0)
+		e = strecpy(buf, buf+nbuf-2, name + n);
 	else
-		t = estrstrdup(name, "/");
-	for(m=mbox->head; m!=nil; m=m->next)
-		if(strcmp(t, m->name) == 0)
-			break;
-	free(t);
-	return m;
+		e = strecpy(buf, buf+nbuf-2, name);
+	if((p = strchr(buf, '/')) == nil)
+		p = e;
+	p[0] = '/';
+	p[1] = 0;
 }
 
-/*
- * Find plumb port, knowing type is text, given file name (by extension)
- */
 int
-plumbportbysuffix(char *file)
+mesgmatch(Mesg *m, char *name, char *digest)
 {
-	char *suf;
-	int i, nsuf, nfile;
-
-	nfile = strlen(file);
-	for(i=0; ports[i].type!=nil; i++){
-		suf = ports[i].suffix;
-		nsuf = strlen(suf);
-		if(nfile > nsuf)
-			if(cistrncmp(file+nfile-nsuf, suf, nsuf) == 0)
-				return i;
-	}
+	if(!(m->state & Sdummy) && strcmp(m->name, name) == 0)
+		return digest == nil || strcmp(m->digest, digest) == 0;
 	return 0;
 }
 
-/*
- * Find plumb port using type and file name (by extension)
- */
-int
-plumbport(char *type, char *file)
+Mesg*
+mesglookup(char *name, char *digest)
 {
+	char buf[32];
 	int i;
 
-	for(i=0; ports[i].type!=nil; i++)
-		if(strncmp(type, ports[i].type, strlen(ports[i].type)) == 0)
-			return i;
-	/* see if it's a text type */
-	for(i=0; goodtypes[i]!=nil; i++)
-		if(strncmp(type, goodtypes[i], strlen(goodtypes[i])) == 0)
-			return plumbportbysuffix(file);
-	return -1;
+	mesgpath2name(buf, sizeof(buf), name);
+	for(i = 0; i < mbox.nmesg; i++)
+		if(mesgmatch(mbox.mesg[i], buf, digest))
+			return mbox.mesg[i];
+	return nil;
 }
 
-void
-plumb(Message *m, char *dir)
+Mesg*
+mesgopen(char *name, char *digest)
 {
-	int i;
-	char *port;
-	Plumbmsg *pm;
+	Mesg *m;
+	char *path;
+	int fd;
 
-	if(strlen(m->type) == 0)
-		return;
-	i = plumbport(m->type, m->filename);
-	if(i < 0)
-		fprint(2, "can't find destination for message subpart\n");
-	else{
-		port = ports[i].port;
-		pm = emalloc(sizeof(Plumbmsg));
-		pm->src = estrdup("Mail");
-		if(port)
-			pm->dst = estrdup(port);
-		else
-			pm->dst = nil;
-		pm->wdir = nil;
-		pm->type = estrdup("text");
-		pm->ndata = -1;
-		pm->data = estrstrdup(dir, "body");
-		pm->data = eappend(pm->data, "", ports[i].suffix);
-		if(plumbsend(plumbsendfd, pm) < 0)
-			fprint(2, "error writing plumb message: %r\n");
-		plumbfree(pm);
-	}
-}
+	m = mesglookup(name, digest);
+	if(m == nil || (m->state & Sopen))
+		return nil;
 
-int
-mesgopen(Message *mbox, char *dir, char *s, Message *mesg, int plumbed, char *digest)
-{
-	char *t, *u, *v;
-	Message *m;
-	char *direlem[10];
-	int i, ndirelem, reuse;
-
-	/* find white-space-delimited first word */
-	for(t=s; *t!='\0' && !isspace(*t); t++)
-		;
-	u = emalloc(t-s+1);
-	memmove(u, s, t-s);
-	/* separate it on slashes */
-	ndirelem = tokenizec(u, direlem, nelem(direlem), "/");
-	if(ndirelem <= 0){
-    Error:
-		free(u);
-		return 0;
-	}
-	if(plumbed){
-		write(wctlfd, "top", 3);
-		write(wctlfd, "current", 7);
-	}
-	/* open window for message */
-	m = mesglookup(mbox, direlem[0], digest);
-	if(m == nil)
-		goto Error;
-	if(mesg!=nil && m!=mesg)	/* string looked like subpart but isn't part of this message */
-		goto Error;
-	if(m->opened == 0){
-		if(m->w == nil){
-			reuse = 0;
-			m->w = newwindow();
-		}else{
-			reuse = 1;
-			/* re-use existing window */
-			if(winsetaddr(m->w, "0,$", 1)){
-				if(m->w->data < 0)
-					m->w->data = winopenfile(m->w, "data");
-				write(m->w->data, "", 0);
-			}
+	assert(!(m->state & Sdummy));
+	m->state |= Sopen;
+	if(!(m->flags & Fseen)){
+		m->flags |= Fseen;
+		path = estrjoin(mbox.path, "/", m->name, "/flags", nil);
+		if((fd = open(path, OWRITE)) != -1){
+			fprint(fd, "+s");
+			close(fd);
 		}
-		v = estrstrdup(mbox->name, m->name);
-		winname(m->w, v);
-		free(v);
-		if(!reuse){
-			if(m->deleted)
-				wintagwrite(m->w, "Q Reply all UnDelmesg Save ", 2+6+4+10+5);
-			else
-				wintagwrite(m->w, "Q Reply all Delmesg Save ", 2+6+4+8+5);
-		}
-		threadcreate(mesgctl, m, STACK);
-		winopenbody(m->w, OWRITE);
-		mesgload(m, dir, m->name, m->w);
-		winclosebody(m->w);
-		winclean(m->w);
-		m->opened = 1;
-		setflags(m, "s");
-		mesgmenureflag(mbox->w, m);
-		if(ndirelem == 1){
-			free(u);
-			return 1;
-		}
+		mbredraw(m, 0, 0);
+		free(path);
 	}
-	if(ndirelem == 1 && plumbport(m->type, m->filename) <= 0){
-		/* make sure dot is visible */
-		ctlprint(m->w->ctl, "show\n");
-		return 0;
-	}
-	/* walk to subpart */
-	dir = estrstrdup(dir, m->name);
-	for(i=1; i<ndirelem; i++){
-		m = mesglookup(m, direlem[i], digest);
-		if(m == nil)
-			break;
-		dir = egrow(dir, m->name, nil);
-	}
-	if(m != nil && plumbport(m->type, m->filename) > 0)
-		plumb(m, dir);
-	free(dir);
-	free(u);
-	return 1;
+	threadcreate(mesgmain, m, Stack);
+	return m;
 }
 
-void
-rewritembox(Window *w, Message *mbox)
+Biobuf*
+mesgopenbody(Mesg *m)
 {
-	Message *m, *next;
-	char *deletestr, *t;
-	int nopen;
+	char *path;
+	int rfd;
+	Mesg *b;
 
-	deletestr = estrstrdup("delete ", fsname);
-
-	nopen = 0;
-	for(m=mbox->head; m!=nil; m=next){
-		next = m->next;
-		if(m->deleted == 0)
-			continue;
-		if(m->opened){
-			nopen++;
-			continue;
-		}
-		if(m->writebackdel){
-			/* messages deleted by plumb message are not removed again */
-			t = estrdup(m->name);
-			if(strlen(t) > 0)
-				t[strlen(t)-1] = '\0';
-			deletestr = egrow(deletestr, " ", t);
-		}
-		mesgmenudel(w, mbox, m);
-		mesgdel(mbox, m);
-	}
-	if(write(mbox->ctlfd, deletestr, strlen(deletestr)) < 0)
-		fprint(2, "Mail: warning: error removing mail message files: %r\n");
-	free(deletestr);
-	winselect(w, "0", 0);
-	if(nopen == 0)
-		winclean(w);
-	mbox->dirty = 0;
-}
-
-/* name is a full file name, but it might not belong to us */
-Message*
-mesglookupfile(Message *mbox, char *name, char *digest)
-{
-	int k, n;
-
-	k = strlen(name);
-	n = strlen(mbox->name);
-	if(k==0 || strncmp(name, mbox->name, n) != 0){
-//		fprint(2, "Mail: message %s not in this mailbox\n", name);
+	b = readparts(m);
+	path = estrjoin(mbox.path, b->name, "body", nil);
+	if(strcmp(b->type, "text/html") == 0)
+		rfd = htmlfmt(m, path);
+	else
+		rfd = open(path, OREAD);
+	free(path);
+	if(rfd == -1)
 		return nil;
-	}
-	return mesglookup(mbox, name+n, digest);
+	return Bfdopen(rfd, OREAD);
 }
--- a/sys/src/cmd/upas/Mail/mkfile
+++ b/sys/src/cmd/upas/Mail/mkfile
@@ -1,25 +1,14 @@
 </$objtype/mkfile
 
+BIN=/acme/bin/$objtype
 TARG=Mail
 OFILES=\
-	html.$O\
-	mail.$O\
+	mbox.$O\
 	mesg.$O\
-	reply.$O\
+	comp.$O\
 	util.$O\
-	win.$O\
+	win.$O
 
-HFILES=dat.h
+HFILES=mail.h
 
-# BIN=/acme/bin/$objtype
-BIN=$ABIN
-
 </sys/src/cmd/mkone
-<../mkupas
-
-$O.out: $OFILES
-	$LD -o $target  $LDFLAGS $OFILES
-
-syms:V:
-	$CC -a mail.c	>syms
-	$CC -aa mesg.c reply.c util.c win.c 	>>syms
--- a/sys/src/cmd/upas/Mail/reply.c
+++ /dev/null
@@ -1,578 +1,0 @@
-#include <u.h>
-#include <libc.h>
-#include <bio.h>
-#include <thread.h>
-#include <ctype.h>
-#include <plumb.h>
-#include "dat.h"
-
-static int	replyid;
-
-int
-quote(Message *m, Biobuf *b, char *dir, char *quotetext)
-{
-	char *body, *type;
-	int i, n, nlines;
-	char **lines;
-
-	if(quotetext){
-		body = quotetext;
-		n = strlen(body);
-		type = nil;
-	}else{
-		/* look for first textual component to quote */
-		type = readfile(dir, "type", &n);
-		if(type == nil){
-			print("no type in %s\n", dir);
-			return 0;
-		}
-		if(strncmp(type, "multipart/", 10)==0 || strncmp(type, "message/", 8)==0){
-			dir = estrstrdup(dir, "1/");
-			if(quote(m, b, dir, nil)){
-				free(type);
-				free(dir);
-				return 1;
-			}
-			free(dir);
-		}
-		if(strncmp(type, "text", 4) != 0){
-			free(type);
-			return 0;
-		}
-		body = readbody(m->type, dir, &n);
-		if(body == nil)
-			return 0;
-	}
-	nlines = 0;
-	for(i=0; i<n; i++)
-		if(body[i] == '\n')
-			nlines++;
-	nlines++;
-	lines = emalloc(nlines*sizeof(char*));
-	nlines = getfields(body, lines, nlines, 0, "\n");
-	/* delete leading and trailing blank lines */
-	i = 0;
-	while(i<nlines && lines[i][0]=='\0')
-		i++;
-	while(i<nlines && lines[nlines-1][0]=='\0')
-		nlines--;
-	while(i < nlines){
-		Bprint(b, ">%s%s\n", lines[i][0]=='>'? "" : " ", lines[i]);
-		i++;
-	}
-	free(lines);
-	free(body);	/* will free quotetext if non-nil */
-	free(type);
-	return 1;
-}
-
-void
-mkreply(Message *m, char *label, char *to, Plumbattr *attr, char *quotetext)
-{
-	Message *r;
-	char *dir, *t;
-	int quotereply;
-	Plumbattr *a;
-
-	quotereply = (label[0] == 'Q');
-	r = emalloc(sizeof(Message));
-	r->isreply = 1;
-	if(m != nil){
-		r->replyname = estrdup(m->name);
-		r->replydigest = estrdup(m->digest);
-	}
-	r->next = replies.head;
-	r->prev = nil;
-	if(replies.head != nil)
-		replies.head->prev = r;
-	replies.head = r;
-	if(replies.tail == nil)
-		replies.tail = r;
-	r->name = emalloc(strlen(mbox.name)+strlen(label)+10);
-	sprint(r->name, "%s%s%d", mbox.name, label, ++replyid);
-	r->w = newwindow();
-	winname(r->w, r->name);
-	ctlprint(r->w->ctl, "cleartag");
-	wintagwrite(r->w, "fmt Look Post Undo", 4+5+5+4);
-	r->tagposted = 1;
-	threadcreate(mesgctl, r, STACK);
-	winopenbody(r->w, OWRITE);
-	if(to!=nil && to[0]!='\0')
-		Bprint(r->w->body, "%s\n", to);
-	for(a=attr; a; a=a->next)
-		Bprint(r->w->body, "%s: %s\n", a->name, a->value);
-	dir = nil;
-	if(m != nil){
-		dir = estrstrdup(mbox.name, m->name);
-		if(to == nil && attr == nil){
-			/* Reply goes to replyto; Reply all goes to From and To and CC */
-			if(strstr(label, "all") == nil)
-				Bprint(r->w->body, "To: %s\n", m->replyto);
-			else{	/* Replyall */
-				if(strlen(m->from) > 0)
-					Bprint(r->w->body, "To: %s\n", m->from);
-				if(strlen(m->to) > 0)
-					Bprint(r->w->body, "To: %s\n", m->to);
-				if(strlen(m->cc) > 0)
-					Bprint(r->w->body, "CC: %s\n", m->cc);
-			}
-		}
-		if(strlen(m->subject) > 0){
-			t = "Subject: Re: ";
-			if(strlen(m->subject) >= 3)
-				if(tolower(m->subject[0])=='r' && tolower(m->subject[1])=='e' && m->subject[2]==':')
-					t = "Subject: ";
-			Bprint(r->w->body, "%s%s\n", t, m->subject);
-		}
-		if(!quotereply){
-			Bprint(r->w->body, "Include: %sraw\n", dir);
-			free(dir);
-		}
-	}
-	Bprint(r->w->body, "\n");
-	if(m == nil)
-		Bprint(r->w->body, "\n");
-	else if(quotereply){
-		quote(m, r->w->body, dir, quotetext);
-		free(dir);
-	}
-	winclosebody(r->w);
-	if(m==nil && (to==nil || to[0]=='\0'))
-		winselect(r->w, "0", 0);
-	else
-		winselect(r->w, "$", 0);
-	winclean(r->w);
-	windormant(r->w);
-}
-
-void
-delreply(Message *m)
-{
-	if(m->next == nil)
-		replies.tail = m->prev;
-	else
-		m->next->prev = m->prev;
-	if(m->prev == nil)
-		replies.head = m->next;
-	else
-		m->prev->next = m->next;
-	mesgfreeparts(m);
-	free(m);
-}
-
-/* copy argv to stack and free the incoming strings, so we don't leak argument vectors */
-void
-buildargv(char **inargv, char *argv[NARGS+1], char args[NARGCHAR])
-{
-	int i, n;
-	char *s, *a;
-
-	s = args;
-	for(i=0; i<NARGS; i++){
-		a = inargv[i];
-		if(a == nil)
-			break;
-		n = strlen(a)+1;
-		if((s-args)+n >= NARGCHAR)	/* too many characters */
-			break;
-		argv[i] = s;
-		memmove(s, a, n);
-		s += n;
-		free(a);
-	}
-	argv[i] = nil;
-}
-
-void
-execproc(void *v)
-{
-	Exec *e;
-	int p[2], q[2];
-	char *prog;
-	char *argv[NARGS+1], args[NARGCHAR];
-
-	e = v;
-	p[0] = e->p[0];
-	p[1] = e->p[1];
-	q[0] = e->q[0];
-	q[1] = e->q[1];
-	prog = e->prog;	/* known not to be malloc'ed */
-	rfork(RFFDG);
-	sendul(e->sync, 1);
-	buildargv(e->argv, argv, args);
-	free(e->argv);
-	chanfree(e->sync);
-	free(e);
-	dup(p[0], 0);
-	close(p[0]);
-	close(p[1]);
-	if(q[0]){
-		dup(q[1], 1);
-		close(q[0]);
-		close(q[1]);
-	}
-	procexec(nil, prog, argv);
-//fprint(2, "exec: %s", e->prog);
-//{int i;
-//for(i=0; argv[i]; i++) print(" '%s'", argv[i]);
-//print("\n");
-//}
-//argv[0] = "cat";
-//argv[1] = nil;
-//procexec(nil, "/bin/cat", argv);
-	fprint(2, "Mail: can't exec %s: %r\n", prog);
-	threadexits("can't exec");
-}
-
-enum{
-	ATTACH,
-	BCC,
-	CC,
-	FROM,
-	INCLUDE,
-	TO,
-};
-
-char *headers[] = {
-	"attach:",
-	"bcc:",
-	"cc:",
-	"from:",
-	"include:",
-	"to:",
-	nil,
-};
-
-int
-whichheader(char *h)
-{
-	int i;
-
-	for(i=0; headers[i]!=nil; i++)
-		if(cistrcmp(h, headers[i]) == 0)
-			return i;
-	return -1;
-}
-
-char *tolist[200];
-char	*cclist[200];
-char	*bcclist[200];
-int ncc, nbcc, nto;
-char	*attlist[200];
-char	included[200];
-
-int
-addressed(char *name)
-{
-	int i;
-
-	for(i=0; i<nto; i++)
-		if(strcmp(name, tolist[i]) == 0)
-			return 1;
-	for(i=0; i<ncc; i++)
-		if(strcmp(name, cclist[i]) == 0)
-			return 1;
-	for(i=0; i<nbcc; i++)
-		if(strcmp(name, bcclist[i]) == 0)
-			return 1;
-	return 0;
-}
-
-char*
-skipbl(char *s, char *e)
-{
-	while(s < e){
-		if(*s!=' ' && *s!='\t' && *s!=',')
-			break;
-		s++;
-	}
-	return s;
-}
-
-char*
-findbl(char *s, char *e)
-{
-	while(s < e){
-		if(*s==' ' || *s=='\t' || *s==',')
-			break;
-		s++;
-	}
-	return s;
-}
-
-/*
- * comma-separate possibly blank-separated strings in line; e points before newline
- */
-void
-commas(char *s, char *e)
-{
-	char *t;
-
-	/* may have initial blanks */
-	s = skipbl(s, e);
-	while(s < e){
-		s = findbl(s, e);
-		if(s == e)
-			break;
-		t = skipbl(s, e);
-		if(t == e)	/* no more words */
-			break;
-		/* patch comma */
-		*s++ = ',';
-		while(s < t)
-			*s++ = ' ';
-	}
-}
-
-int
-print2(int fd, int ofd, char *fmt, ...)
-{
-	int m, n;
-	char *s;
-	va_list arg;
-
-	va_start(arg, fmt);
-	s = vsmprint(fmt, arg);
-	va_end(arg);
-	if(s == nil)
-		return -1;
-	m = strlen(s);
-	n = write(fd, s, m);
-	if(ofd >= 0)
-		write(ofd, s, m);
-	return n;
-}
-
-int
-write2(int fd, int ofd, char *buf, int n, int nofrom)
-{
-	char *from, *p;
-	int m = 0;
-
-	if(fd >= 0)
-		m = write(fd, buf, n);
-
-	if(ofd < 0)
-		return m;
-
-	if(nofrom == 0)
-		return write(ofd, buf, n);
-
-	/* need to escape leading From lines to avoid corrupting 'outgoing' mailbox */
-	for(p=buf; *p; p+=m){
-		from = cistrstr(p, "from");
-		if(from == nil)
-			m = n;
-		else
-			m = from - p;
-		if(m > 0)
-			write(ofd, p, m);
-		if(from){
-			/* escape with space if From is at start of line */
-			if(p==buf || from[-1]=='\n')
-				write(ofd, " ", 1);
-			write(ofd, from, 4);
-			m += 4;
-		}
-		n -= m;
-	}
-	return p - buf;
-}
-
-void
-mesgsend(Message *m)
-{
-	char *s, *body, *to;
-	int i, j, h, n, natt, p[2];
-	Exec *e;
-	Channel *sync;
-	Message *r;
-	int first, nfld, delit, ofd;
-	char *copy, *fld[100];
-	Tzone *tz;
-	Tm now;
-
-	body = winreadbody(m->w, &n);
-	/* assemble to: list from first line, to: line, and cc: line */
-	nto = 0;
-	natt = 0;
-	ncc = 0;
-	nbcc = 0;
-	first = 1;
-	to = body;
-	for(;;){
-		for(s=to; *s!='\n'; s++)
-			if(*s == '\0'){
-				free(body);
-				return;
-			}
-		if(s++ == to)	/* blank line */
-			break;
-		/* make copy of line to tokenize */
-		copy = emalloc(s-to);
-		memmove(copy, to, s-to);
-		copy[s-to-1] = '\0';
-		nfld = tokenizec(copy, fld, nelem(fld), ", \t");
-		if(nfld == 0){
-			free(copy);
-			break;
-		}
-		n -= s-to;
-		switch(h = whichheader(fld[0])){
-		case TO:
-		case FROM:
-			delit = 1;
-			commas(to+strlen(fld[0]), s-1);
-			for(i=1; i<nfld && nto<nelem(tolist); i++)
-				if(!addressed(fld[i]))
-					tolist[nto++] = estrdup(fld[i]);
-			break;
-		case BCC:
-			delit = 1;
-			commas(to+strlen(fld[0]), s-1);
-			for(i=1; i<nfld && nbcc<nelem(bcclist); i++)
-				if(!addressed(fld[i]))
-					bcclist[nbcc++] = estrdup(fld[i]);
-			break;
-		case CC:
-			delit = 1;
-			commas(to+strlen(fld[0]), s-1);
-			for(i=1; i<nfld && ncc<nelem(cclist); i++)
-				if(!addressed(fld[i]))
-					cclist[ncc++] = estrdup(fld[i]);
-			break;
-		case ATTACH:
-		case INCLUDE:
-			delit = 1;
-			for(i=1; i<nfld && natt<nelem(attlist); i++){
-				attlist[natt] = estrdup(fld[i]);
-				included[natt++] = (h == INCLUDE);
-			}
-			break;
-		default:
-			if(first){
-				delit = 1;
-				for(i=0; i<nfld && nto<nelem(tolist); i++)
-					tolist[nto++] = estrdup(fld[i]);
-			}else	/* ignore it */
-				delit = 0;
-			break;
-		}
-		if(delit){
-			/* delete line from body */
-			memmove(to, s, n+1);
-		}else
-			to = s;
-		free(copy);
-		first = 0;
-	}
-
-	ofd = open(outgoing, OWRITE|OCEXEC);	/* no error check necessary */
-	if(ofd >= 0){
-		/* From dhog Fri Aug 24 22:13:00 +0500 2001 */
-		tz = tzload("local");
-		tmnow(&now, tz);
-		fprint(ofd, "From %s %τ", user, tmfmt(&now, "WW MMM _D hh:mm:ss Z YYYY"));
-		fprint(ofd, "From: %s\n", user);
-		fprint(ofd, "Date: %τ", tmfmt(&now, "WW MMM _D hh:mm:ss Z YYYY"));
-		for(i=0; i<natt; i++)
-			if(included[i])
-				fprint(ofd, "Include: %s\n", attlist[i]);
-			else
-				fprint(ofd, "Attach: %s\n", attlist[i]);
-		/* needed because mail is by default Latin-1 */
-		fprint(ofd, "Content-Type: text/plain; charset=\"UTF-8\"\n");
-		fprint(ofd, "Content-Transfer-Encoding: 8bit\n");
-	}
-
-	e = emalloc(sizeof(Exec));
-	if(pipe(p) < 0)
-		error("can't create pipe: %r");
-	e->p[0] = p[0];
-	e->p[1] = p[1];
-	e->prog = "/bin/upas/marshal";
-	e->argv = emalloc((1+1+2+4*natt+1)*sizeof(char*));
-	e->argv[0] = estrdup("marshal");
-	e->argv[1] = estrdup("-8");
-	j = 2;
-	if(m->replyname){
-		e->argv[j++] = estrdup("-R");
-		e->argv[j++] = estrstrdup(mbox.name, m->replyname);
-	}
-	for(i=0; i<natt; i++){
-		if(included[i])
-			e->argv[j++] = estrdup("-A");
-		else
-			e->argv[j++] = estrdup("-a");
-		e->argv[j++] = estrdup(attlist[i]);
-	}
-	sync = chancreate(sizeof(int), 0);
-	e->sync = sync;
-	proccreate(execproc, e, EXECSTACK);
-	recvul(sync);
-	close(p[0]);
-
-	/* using marshal -8, so generate rfc822 headers */
-	if(nto > 0){
-		print2(p[1], ofd, "To: ");
-		for(i=0; i<nto-1; i++)
-			print2(p[1], ofd, "%s, ", tolist[i]);
-		print2(p[1], ofd, "%s\n", tolist[i]);
-	}
-	if(ncc > 0){
-		print2(p[1], ofd, "CC: ");
-		for(i=0; i<ncc-1; i++)
-			print2(p[1], ofd, "%s, ", cclist[i]);
-		print2(p[1], ofd, "%s\n", cclist[i]);
-	}
-	if(nbcc > 0){
-		print2(p[1], ofd, "BCC: ");
-		for(i=0; i<nbcc-1; i++)
-			print2(p[1], ofd, "%s, ", bcclist[i]);
-		print2(p[1], ofd, "%s\n", bcclist[i]);
-	}
-
-	i = strlen(body);
-	if(i > 0)
-		write2(p[1], ofd, body, i, 1);
-
-	/* guarantee a blank line, to ensure attachments are separated from body */
-	if(i==0 || body[i-1]!='\n')
-		write2(p[1], ofd, "\n\n", 2, 0);
-	else if(i>1 && body[i-2]!='\n')
-		write2(p[1], ofd, "\n", 1, 0);
-
-	/* these look like pseudo-attachments in the "outgoing" box */
-	if(ofd>=0 && natt>0){
-		for(i=0; i<natt; i++)
-			if(included[i])
-				fprint(ofd, "=====> Include: %s\n", attlist[i]);
-			else
-				fprint(ofd, "=====> Attach: %s\n", attlist[i]);
-	}
-	if(ofd >= 0)
-		write(ofd, "\n", 1);
-
-	for(i=0; i<natt; i++)
-		free(attlist[i]);
-	close(ofd);
-	close(p[1]);
-	free(body);
-
-	if(m->replyname){
-		if((r = mesglookup(&mbox, m->replyname, m->replydigest)) != nil){
-			setflags(r, "a");
-			mesgmenureflag(mbox.w, r);
-		}
-	}
-	if(m->name[0] == '/')
-		s = estrdup(m->name);
-	else
-		s = estrstrdup(mbox.name, m->name);
-	s = egrow(s, "-R", nil);
-	winname(m->w, s);
-	free(s);
-	winclean(m->w);
-	/* mark message unopened because it's no longer the original message */
-	m->opened = 0;
-}
--- a/sys/src/cmd/upas/Mail/util.c
+++ b/sys/src/cmd/upas/Mail/util.c
@@ -2,104 +2,139 @@
 #include <libc.h>
 #include <bio.h>
 #include <thread.h>
-#include <plumb.h>
-#include "dat.h"
+#include <regexp.h>
 
-void*
-emalloc(uint n)
-{
-	void *p;
+#include "mail.h"
 
-	p = malloc(n);
-	if(p == nil)
-		error("can't malloc: %r");
-	memset(p, 0, n);
-	setmalloctag(p, getcallerpc(&n));
-	return p;
+void *
+emalloc(ulong n)
+{
+	void *v;
+	
+	v = mallocz(n, 1);
+	if(v == nil)
+		sysfatal("malloc: %r");
+	setmalloctag(v, getcallerpc(&n));
+	return v;
 }
 
-void*
-erealloc(void *p, uint n)
+void *
+erealloc(void *p, ulong n)
 {
-	p = realloc(p, n);
-	if(p == nil)
-		error("can't realloc: %r");
-	setmalloctag(p, getcallerpc(&n));
-	return p;
+	void *v;
+	
+	v = realloc(p, n);
+	if(v == nil)
+		sysfatal("realloc: %r");
+	setmalloctag(v, getcallerpc(&p));
+	return v;
 }
 
 char*
 estrdup(char *s)
 {
-	char *t;
-
-	t = emalloc(strlen(s)+1);
-	strcpy(t, s);
-	return t;
+	s = strdup(s);
+	if(s == nil)
+		sysfatal("strdup: %r");
+	setmalloctag(s, getcallerpc(&s));
+	return s;
 }
 
 char*
-estrstrdup(char *s, char *t)
+estrjoin(char *s, ...)
 {
-	char *u;
+	va_list ap;
+	char *r, *t, *p, *e;
+	int n;
 
-	u = emalloc(strlen(s)+strlen(t)+1);
-	strcpy(u, s);
-	strcat(u, t);
-	return u;
+	va_start(ap, s);
+	n = strlen(s) + 1;
+	while((p = va_arg(ap, char*)) != nil)
+		n += strlen(p);
+	va_end(ap);
+
+	r = emalloc(n);
+	e = r + n;
+	va_start(ap, s);
+	t = strecpy(r, e, s);
+	while((p = va_arg(ap, char*)) != nil)
+		t = strecpy(t, e, p);
+	va_end(ap);
+	return r;
 }
 
 char*
-eappend(char *s, char *sep, char *t)
+esmprint(char *fmt, ...)
 {
-	char *u;
+	char *s;
+	va_list ap;
 
-	if(t == nil)
-		u = estrstrdup(s, sep);
-	else{
-		u = emalloc(strlen(s)+strlen(sep)+strlen(t)+1);
-		strcpy(u, s);
-		strcat(u, sep);
-		strcat(u, t);
-	}
-	free(s);
-	return u;
+	va_start(ap, fmt);
+	s = vsmprint(fmt, ap);
+	va_end(ap);
+	if(s == nil)
+		sysfatal("smprint: %r");
+	setmalloctag(s, getcallerpc(&fmt));
+	return s;
 }
 
 char*
-egrow(char *s, char *sep, char *t)
+fslurp(int fd, int *nbuf)
 {
-	s = eappend(s, sep, t);
-	free(t);
-	return s;
+	int n, sz, r;
+	char *buf;
+
+	n = 0;
+	sz = 128;
+	buf = emalloc(sz);
+	while(1){
+		r = read(fd, buf + n, sz - n);
+		if(r == 0)
+			break;
+		if(r == -1)
+			goto error;
+		n += r;
+		if(n == sz){
+			sz += sz/2;
+			buf = erealloc(buf, sz);
+		}
+	}
+	buf[n] = 0;
+	if(nbuf)
+		*nbuf = n;
+	return buf;
+error:
+	free(buf);
+	return nil;
 }
 
-void
-error(char *fmt, ...)
+char *
+rslurp(Mesg *m, char *f, int *nbuf)
 {
-	Fmt f;
-	char buf[64];
-	va_list arg;
+	char *path;
+	int fd;
+	char *r;
 
-	fmtfdinit(&f, 2, buf, sizeof buf);
-	fmtprint(&f, "Mail: ");
-	va_start(arg, fmt);
-	fmtvprint(&f, fmt, arg);
-	va_end(arg);
-	fmtprint(&f, "\n");
-	fmtfdflush(&f);
-	threadexitsall(fmt);
+	if(m == nil)
+		path = estrjoin(mbox.path, "/", f, nil);
+	else
+		path = estrjoin(mbox.path, "/", m->name, "/", f, nil);
+	fd = open(path, OREAD);
+	free(path);
+	if(fd == -1)
+		return nil;
+	r = fslurp(fd, nbuf);
+	close(fd);
+	return r;
 }
 
-void
-ctlprint(int fd, char *fmt, ...)
+u32int
+strhash(char *s)
 {
-	int n;
-	va_list arg;
+	u32int h, c;
 
-	va_start(arg, fmt);
-	n = vfprint(fd, fmt, arg);
-	va_end(arg);
-	if(n <= 0)
-		error("control file write error: %r");
+	h = 5381;
+	while(c = *s++ & 0xff)
+		h = ((h << 5) + h) + c;
+	return h;
 }
--- a/sys/src/cmd/upas/Mail/win.c
+++ b/sys/src/cmd/upas/Mail/win.c
@@ -2,340 +2,280 @@
 #include <libc.h>
 #include <bio.h>
 #include <thread.h>
-#include <plumb.h>
-#include "dat.h"
+#include <regexp.h>
 
-Window*
-newwindow(void)
-{
-	char buf[12];
-	Window *w;
+#include "mail.h"
 
-	w = emalloc(sizeof(Window));
-	w->ctl = open("/mnt/wsys/new/ctl", ORDWR|OCEXEC);
-	if(w->ctl<0 || read(w->ctl, buf, 12)!=12)
-		error("can't open window ctl file: %r");
-	ctlprint(w->ctl, "noscroll\n");
-	w->id = atoi(buf);
-	w->event = winopenfile(w, "event");
-	w->addr = -1;	/* will be opened when needed */
-	w->body = nil;
-	w->data = -1;
-	w->cevent = chancreate(sizeof(Event*), 0);
-	return w;
+static int
+procrd(Biobufhdr *f, void *buf, long len)
+{
+	return ioread(f->aux, f->fid, buf, len);
 }
 
-void
-winsetdump(Window *w, char *dir, char *cmd)
+static int
+procwr(Biobufhdr *f, void *buf, long len)
 {
-	if(dir != nil)
-		ctlprint(w->ctl, "dumpdir %s\n", dir);
-	if(cmd != nil)
-		ctlprint(w->ctl, "dump %s\n", cmd);
+	return iowrite(f->aux, f->fid, buf, len);
 }
 
-void
-wineventproc(void *v)
+/*
+ * NB: this function consumes integers with
+ * a trailing space, as generated by acme;
+ * it's not a general purpose number parsing
+ * function.
+ */
+static int
+evgetnum(Biobuf *f)
 {
-	Window *w;
-	int i;
+	int c, n;
 
-	w = v;
-	for(i=0; ; i++){
-		if(i >= NEVENT)
-			i = 0;
-		wingetevent(w, &w->e[i]);
-		sendp(w->cevent, &w->e[i]);
+	n = 0;
+	while('0'<=(c=Bgetc(f)) && c<='9')
+		n = n*10+(c-'0');
+	if(c != ' '){
+		werrstr("event number syntax: %c", c);
+		return -1;
 	}
+	return n;
 }
 
 static int
-winopenfile1(Window *w, char *f, int m)
+evgetdata(Biobuf *f, Event *e)
 {
-	char buf[64];
-	int fd;
+	int i, n, o;
+	Rune r;
 
-	sprint(buf, "/mnt/wsys/%d/%s", w->id, f);
-	fd = open(buf, m|OCEXEC);
-	if(fd < 0)
-		error("can't open window file %s: %r", f);
-	return fd;
+	o = 0;
+	n = evgetnum(f);
+	for(i = 0; i < n; i++){
+		if((r = Bgetrune(f)) == -1)
+			break;
+		o += runetochar(e->text + o, &r);
+	}
+	e->text[o] = 0;
+	return o;
 }
 
 int
-winopenfile(Window *w, char *f)
+winevent(Win *w, Event *e)
 {
-	return winopenfile1(w, f, ORDWR);
-}
+	int flags;
 
-void
-wintagwrite(Window *w, char *s, int n)
-{
-	int fd;
-
-	fd = winopenfile(w, "tag");
-	if(write(fd, s, n) != n)
-		error("tag write: %r");
-	close(fd);
+	flags = 0;
+Again:
+	e->action = Bgetc(w->event);
+	e->type = Bgetc(w->event);
+	e->q0 = evgetnum(w->event);
+	e->q1 = evgetnum(w->event);
+	e->flags = evgetnum(w->event);
+	e->ntext = evgetdata(w->event, e);
+	if(Bgetc(w->event) != '\n'){
+		werrstr("unterminated message");
+		return -1;
+	}
+//fprint(2, "event: %c%c %d %d %x %.*s\n", e->action, e->type, e->q0, e->q1, e->flags, e->ntext, e->text);
+	if(e->flags & 0x2){
+		e->p0 = e->q0;
+		flags = e->flags;
+		goto Again;
+	}
+	e->flags |= flags;
+	return e->action;
 }
 
 void
-winname(Window *w, char *s)
+winreturn(Win *w, Event *e)
 {
-	ctlprint(w->ctl, "name %s\n", s);
+	if(e->flags & 0x2)
+		fprint(w->revent, "%c%c%d %d\n", e->action, e->type, e->p0, e->p0);
+	else
+		fprint(w->revent, "%c%c%d %d\n", e->action, e->type, e->q0, e->q1);
 }
 
-void
-winopenbody(Window *w, int mode)
+int
+winopen(Win *w, char *f, int mode)
 {
-	char buf[256];
+	char buf[128];
+	int fd;
 
-	sprint(buf, "/mnt/wsys/%d/body", w->id);
-	w->body = Bopen(buf, mode|OCEXEC);
-	if(w->body == nil)
-		error("can't open window body file: %r");
+	snprint(buf, sizeof(buf), "/mnt/wsys/%d/%s", w->id, f);
+	if((fd = open(buf, mode|OCEXEC)) == -1)
+		sysfatal("open %s: %r", buf);
+	return fd;
 }
 
-void
-winclosebody(Window *w)
+Biobuf*
+bwinopen(Win *w, char *f, int mode)
 {
-	if(w->body != nil){
-		Bterm(w->body);
-		w->body = nil;
-	}
-}
+	char buf[128];
+	Biobuf *bfd;
 
-void
-winwritebody(Window *w, char *s, int n)
-{
-	if(w->body == nil)
-		winopenbody(w, OWRITE);
-	if(Bwrite(w->body, s, n) != n)
-		error("write error to window: %r");
+	snprint(buf, sizeof(buf), "/mnt/wsys/%d/%s", w->id, f);
+	if((bfd = Bopen(buf, mode|OCEXEC)) == nil)
+		sysfatal("open %s: %r", buf);
+	bfd->aux = w->io;
+	Biofn(bfd, (mode == OREAD)?procrd:procwr);
+	return bfd;
 }
 
-int
-wingetec(Window *w)
+Biobuf*
+bwindata(Win *w, int mode)
 {
-	if(w->nbuf == 0){
-		w->nbuf = read(w->event, w->buf, sizeof w->buf);
-		if(w->nbuf <= 0){
-			/* probably because window has exited, and only called by wineventproc, so just shut down */
-			threadexits(nil);
-		}
-		w->bufp = w->buf;
-	}
-	w->nbuf--;
-	return *w->bufp++;
-}
+	int fd;
 
-int
-wingeten(Window *w)
-{
-	int n, c;
-
-	n = 0;
-	while('0'<=(c=wingetec(w)) && c<='9')
-		n = n*10+(c-'0');
-	if(c != ' ')
-		error("event number syntax");
-	return n;
+	if((fd = dup(w->data, -1)) == -1)
+		sysfatal("dup: %r");
+	return Bfdopen(fd, mode);
 }
 
-int
-wingeter(Window *w, char *buf, int *nb)
+void
+wininit(Win *w, char *name)
 {
-	Rune r;
-	int n;
+	char buf[12];
 
-	r = wingetec(w);
-	buf[0] = r;
-	n = 1;
-	if(r >= Runeself) {
-		while(!fullrune(buf, n))
-			buf[n++] = wingetec(w);
-		chartorune(&r, buf);
-	} 
-	*nb = n;
-	return r;
+	w->ctl = open("/mnt/wsys/new/ctl", ORDWR|OCEXEC);
+	if(w->ctl < 0)
+		sysfatal("winopen: %r");
+	if(read(w->ctl, buf, 12)!=12)
+		sysfatal("read ctl: %r");
+	if(fprint(w->ctl, "name %s\n", name) == -1)
+		sysfatal("write ctl: %r");
+	if(fprint(w->ctl, "noscroll\n") == -1)
+		sysfatal("write ctl: %r");
+	w->io = ioproc();
+	w->id = atoi(buf);
+	w->event = bwinopen(w, "event", OREAD);
+	w->revent = winopen(w, "event", OWRITE);
+	w->addr = winopen(w, "addr", ORDWR);
+	w->data = winopen(w, "data", ORDWR);
+	w->open = 1;
 }
 
 void
-wingetevent(Window *w, Event *e)
+winclose(Win *w)
 {
-	int i, nb;
-
-	e->c1 = wingetec(w);
-	e->c2 = wingetec(w);
-	e->q0 = wingeten(w);
-	e->q1 = wingeten(w);
-	e->flag = wingeten(w);
-	e->nr = wingeten(w);
-	if(e->nr > EVENTSIZE)
-		error("event string too long");
-	e->nb = 0;
-	for(i=0; i<e->nr; i++){
-		e->r[i] = wingeter(w, e->b+e->nb, &nb);
-		e->nb += nb;
-	}
-	e->r[e->nr] = 0;
-	e->b[e->nb] = 0;
-	if(wingetec(w) != '\n')
-		error("event syntax error");
+	if(w->open)
+		fprint(w->ctl, "delete\n");
+	if(w->data != -1)
+		close(w->data);
+	if(w->addr != -1)
+		close(w->addr);
+	if(w->event != nil)
+		Bterm(w->event);
+	if(w->revent != -1)
+		close(w->revent);
+	if(w->io)
+		closeioproc(w->io);
+	if(w->ctl != -1)
+		close(w->ctl);
+	w->ctl = -1;
+	w->data = -1;
+	w->addr = -1;
+	w->event = nil;
+	w->revent = -1;
+	w->io = nil;
 }
 
 void
-winwriteevent(Window *w, Event *e)
+wintagwrite(Win *w, char *s)
 {
-	fprint(w->event, "%c%c%d %d\n", e->c1, e->c2, e->q0, e->q1);
+	int fd, n;
+
+	n = strlen(s);
+	fd = winopen(w, "tag", OWRITE);
+	if(write(fd, s, n) != n)
+		sysfatal("tag write: %r");
+	close(fd);
 }
 
-void
-winread(Window *w, uint q0, uint q1, char *data)
+int
+winread(Win *w, int q0, int q1, char *data, int ndata)
 {
 	int m, n, nr;
-	char buf[256];
+	char *buf;
 
-	if(w->addr < 0)
-		w->addr = winopenfile(w, "addr");
-	if(w->data < 0)
-		w->data = winopenfile(w, "data");
 	m = q0;
+	buf = emalloc(Bufsz);
 	while(m < q1){
 		n = sprint(buf, "#%d", m);
-		if(write(w->addr, buf, n) != n)
-			error("error writing addr: %r");
-		n = read(w->data, buf, sizeof buf);
-		if(n <= 0)
-			error("reading data: %r");
+		if(write(w->addr, buf, n) != n){
+			fprint(2, "error writing addr: %r");
+			goto err;
+		}
+		n = read(w->data, buf, Bufsz);
+		if(n <= 0){
+			fprint(2, "reading data: %r");
+			goto err;
+		}
 		nr = utfnlen(buf, n);
 		while(m+nr >q1){
 			do; while(n>0 && (buf[--n]&0xC0)==0x80);
 			--nr;
 		}
-		if(n == 0)
+		if(n == 0 || n > ndata)
 			break;
 		memmove(data, buf, n);
+		ndata -= n;
 		data += n;
 		*data = 0;
 		m += nr;
 	}
+	free(buf);
+	return 0;
+err:
+	free(buf);
+	return -1;
 }
 
-void
-windormant(Window *w)
+char*
+winreadsel(Win *w)
 {
-	if(w->addr >= 0){
-		close(w->addr);
-		w->addr = -1;
+	int n, q0, q1;
+	char *r;
+
+	wingetsel(w, &q0, &q1);
+	n = UTFmax*(q1-q0);
+	r = emalloc(n + 1);
+	if(winread(w, q0, q1, r, n) == -1){
+		free(r);
+		return nil;
 	}
-	if(w->body != nil){
-		Bterm(w->body);
-		w->body = nil;
-	}
-	if(w->data >= 0){
-		close(w->data);
-		w->data = -1;
-	}
+	return r;
 }
 
-
-int
-windel(Window *w, int sure)
+void
+wingetsel(Win *w, int *q0, int *q1)
 {
-	if(sure)
-		write(w->ctl, "delete\n", 7);
-	else if(write(w->ctl, "del\n", 4) != 4)
-		return 0;
-	/* event proc will die due to read error from event file */
-	windormant(w);
-	close(w->ctl);
-	w->ctl = -1;
-	close(w->event);
-	w->event = -1;
-	return 1;
+	char *e, buf[25];
+
+	fprint(w->ctl, "addr=dot");
+	if(pread(w->addr, buf, 24, 0) != 24)
+		sysfatal("read addr: %r");
+	buf[24] = 0;
+	*q0 = strtol(buf, &e, 10);
+	*q1 = strtol(e, nil, 10);
 }
 
 void
-winclean(Window *w)
+winsetsel(Win *w, int q0, int q1)
 {
-	if(w->body)
-		Bflush(w->body);
-	ctlprint(w->ctl, "clean\n");
+	fprint(w->addr, "#%d,#%d", q0, q1);
+	fprint(w->ctl, "dot=addr");
 }
 
 int
-winsetaddr(Window *w, char *addr, int errok)
+matchmesg(Win *, char *text)
 {
-	if(w->addr < 0)
-		w->addr = winopenfile(w, "addr");
-	if(write(w->addr, addr, strlen(addr)) < 0){
-		if(!errok)
-			error("error writing addr(%s): %r", addr);
-		return 0;
-	}
-	return 1;
-}
+	Resub m[3];
 
-int
-winselect(Window *w, char *addr, int errok)
-{
-	if(winsetaddr(w, addr, errok)){
-		ctlprint(w->ctl, "dot=addr\n");
-		return 1;
-	}
-	return 0;
-}
-
-char*
-winreadbody(Window *w, int *np)	/* can't use readfile because acme doesn't report the length */
-{
-	char *s;
-	int m, na, n;
-
-	if(w->body != nil)
-		winclosebody(w);
-	winopenbody(w, OREAD);
-	s = nil;
-	na = 0;
-	n = 0;
-	for(;;){
-		if(na < n+512){
-			na += 1024;
-			s = realloc(s, na+1);
+	memset(m, 0, sizeof(m));
+	if(strncmp(text, mbox.path, strlen(mbox.path)) == 0)
+		return strstr(text + strlen(mbox.path), "/body") == nil;
+	else if(regexec(mesgpat, text, m, nelem(m))){
+		if(*m[1].ep == 0 || *m[1].ep == '/'){
+			*m[1].ep = 0;
+			return 1;
 		}
-		m = Bread(w->body, s+n, na-n);
-		if(m <= 0)
-			break;
-		n += m;
 	}
-	s[n] = 0;
-	winclosebody(w);
-	*np = n;
-	return s;
-}
-
-char*
-winselection(Window *w)
-{
-	int fd, m, n;
-	char *buf;
-	char tmp[256];
-
-	fd = winopenfile1(w, "rdsel", OREAD);
-	if(fd < 0)
-		error("can't open rdsel: %r");
-	n = 0;
-	buf = nil;
-	for(;;){
-		m = read(fd, tmp, sizeof tmp);
-		if(m <= 0)
-			break;
-		buf = erealloc(buf, n+m+1);
-		memmove(buf+n, tmp, m);
-		n += m;
-		buf[n] = '\0';
-	}
-	close(fd);
-	return buf;
+	return 0;
 }