ref: 5c1feb0ef0b795e5de71e956f9ccddcd5c4b7f21
dir: /sys/src/cmd/ratfs/main.c/
#include "ratfs.h"
#define SRVFILE "/srv/ratify"
#define MOUNTPOINT "/mail/ratify"
#define CTLFILE "/mail/lib/blocked"
#define CONFFILE "/mail/lib/smtpd.conf.ext"
typedef struct Filetree Filetree;
/* prototype file tree */
struct Filetree
{
int level;
char *name;
ushort type;
int mode;
ulong qid;
};
/* names of first-level directories - must be in order of level*/
Filetree filetree[] =
{
0, "/", Directory, 0555|DMDIR, Qroot,
1, "allow", Addrdir, 0555|DMDIR, Qallow,
1, "delay", Addrdir, 0555|DMDIR, Qdelay,
1, "block", Addrdir, 0555|DMDIR, Qblock,
1, "dial", Addrdir, 0555|DMDIR, Qdial,
1, "deny", Addrdir, 0555|DMDIR, Qdeny,
1, "trusted", Trusted, 0777|DMDIR, Qtrusted, /* creation allowed */
1, "ctl", Ctlfile, 0222, Qctl,
2, "ip", IPaddr, 0555|DMDIR, Qaddr,
2, "account", Acctaddr, 0555|DMDIR, Qaddr,
0, 0, 0, 0, 0,
};
int debugfd = -1;
int trustedqid = Qtrustedfile;
char *ctlfile = CTLFILE;
char *conffile = CONFFILE;
#pragma varargck type "I" Cidraddr*
static int ipconv(Fmt*);
static void post(int, char*);
static void setroot(void);
void
usage(void)
{
fprint(2, "ratfs [-d] [-c conffile] [-f ctlfile] [-m mountpoint]\n");
exits("usage");
}
void
main(int argc, char *argv[])
{
char *mountpoint = MOUNTPOINT;
int p[2];
ARGBEGIN {
case 'c':
conffile = ARGF();
break;
case 'd':
debugfd = 2; /* stderr*/
break;
case 'f':
ctlfile = ARGF();
break;
case 'm':
mountpoint = ARGF();
break;
} ARGEND
if(argc != 0)
usage();
fmtinstall('I', ipconv);
setroot();
getconf();
reload();
/* get a pipe and mount it in /srv */
if(pipe(p) < 0)
fatal("pipe failed: %r");
srvfd = p[0];
post(p[1], mountpoint);
/* start the 9fs protocol */
switch(rfork(RFPROC|RFNAMEG|RFENVG|RFFDG|RFNOTEG|RFREND)){
case -1:
fatal("fork: %r");
case 0:
/* seal off standard input/output */
close(0);
open("/dev/null", OREAD);
close(1);
open("/dev/null", OWRITE);
close(p[1]);
fmtinstall('F', fcallfmt); /* debugging */
io();
fprint(2, "ratfs dying\n");
break;
default:
close(p[0]);
if(mount(p[1], -1, mountpoint, MREPL|MCREATE, "") < 0)
fatal("mount failed: %r");
}
exits(0);
}
static void
setroot(void)
{
Filetree *fp;
Node *np;
int qid;
root = 0;
qid = Qaddr;
for(fp = filetree; fp->name; fp++) {
switch(fp->level) {
case 0: /* root */
case 1: /* second level directory */
newnode(root, fp->name, fp->type, fp->mode, fp->qid);
break;
case 2: /* lay down the Ipaddr and Acctaddr subdirectories */
for (np = root->children; np; np = np->sibs){
if(np->d.type == Addrdir)
newnode(np, fp->name, fp->type, fp->mode, qid++);
}
break;
default:
fatal("bad filetree");
}
}
dummy.d.type = Dummynode;
dummy.d.mode = 0444;
dummy.d.uid = "upas";
dummy.d.gid = "upas";
dummy.d.atime = dummy.d.mtime = time(0);
dummy.d.qid.path = Qdummy; /* for now */
}
static void
post(int fd, char *mountpoint)
{
int f;
char buf[128];
if(access(SRVFILE,0) >= 0){
/*
* If we can open and mount the /srv node,
* another server is already running, so just exit.
*/
f = open(SRVFILE, ORDWR);
if(f >= 0 && mount(f, -1, mountpoint, MREPL|MCREATE, "") >= 0){
unmount(0, mountpoint);
close(f);
exits(0);
}
remove(SRVFILE);
}
/*
* create the server node and post our pipe to it
*/
f = create(SRVFILE, OWRITE, 0666);
if(f < 0)
fatal("can't create %s", SRVFILE);
sprint(buf, "%d", fd);
if(write(f, buf, strlen(buf)) != strlen(buf))
fatal("can't write %s", SRVFILE);
close(f);
}
/*
* print message and die
*/
void
fatal(char *fmt, ...)
{
va_list arg;
char buf[8*1024];
va_start(arg, fmt);
vseprint(buf, buf + (sizeof(buf)-1) / sizeof(*buf), fmt, arg);
va_end(arg);
fprint(2, "%s: %s\n", argv0, buf);
exits(buf);
}
/*
* create a new directory node
*/
Node*
newnode(Node *parent, char *name, ushort type, int mode, ulong qid)
{
Node *np;
np = mallocz(sizeof(Node), 1);
if(np == 0)
fatal("out of memory");
np->d.name = atom(name);
np->d.type = type;
np->d.mode = mode;
np->d.mtime = np->d.atime = time(0);
np->d.uid = atom("upas");
np->d.gid = atom("upas");
np->d.muid = atom("upas");
if(np->d.mode&DMDIR)
np->d.qid.type = QTDIR;
np->d.qid.path = qid;
np->d.qid.vers = 0;
if(parent){
np->parent = parent;
np->sibs = parent->children;
parent->children = np;
parent->count++;
} else {
/* the root node */
root = np;
np->parent = np;
np->children = 0;
np->sibs = 0;
}
return np;
}
void
printnode(Node *np)
{
fprint(debugfd, "Node at %p: %s (%s %s)", np, np->d.name, np->d.uid, np->d.gid);
if(np->d.qid.type&QTDIR)
fprint(debugfd, " QTDIR");
fprint(debugfd, "\n");
fprint(debugfd,"\tQID: %llud.%lud Mode: %lo Type: %d\n", np->d.qid.path,
np->d.qid.vers, np->d.mode, np->d.type);
fprint(debugfd, "\tMod: %.15s Acc: %.15s Count: %d\n", ctime(np->d.mtime)+4,
ctime(np->d.atime)+4, np->count);
switch(np->d.type)
{
case Directory:
fprint(debugfd, "\tDirectory Child: %p", np->children);
break;
case Addrdir:
fprint(debugfd, "\tAddrdir Child: %p", np->children);
break;
case IPaddr:
fprint(debugfd, "\tIPaddr Base: %p Alloc: %d BaseQid %lud", np->addrs,
np->allocated, np->baseqid);
break;
case Acctaddr:
fprint(debugfd, "\tAcctaddr Base: %p Alloc: %d BaseQid %lud", np->addrs,
np->allocated, np->baseqid);
break;
case Trusted:
fprint(debugfd, "\tTrusted Child: %p", np->children);
break;
case Trustedperm:
fprint(debugfd, "\tPerm Trustedfile: %I", &np->ip);
break;
case Trustedtemp:
fprint(debugfd, "\tTemp Trustedfile: %I", &np->ip);
break;
case Ctlfile:
fprint(debugfd, "\tCtlfile");
break;
case Dummynode:
fprint(debugfd, "\tDummynode");
break;
default:
fprint(debugfd, "\tUnknown Node Type\n\n");
return;
}
fprint(debugfd, " Parent %p Sib: %p\n\n", np->parent, np->sibs);
}
void
printfid(Fid *fp)
{
fprint(debugfd, "FID: %d (%s %s) Busy: %d Open: %d\n", fp->fid, fp->name,
fp->uid, fp->busy, fp->open);
printnode(fp->node);
}
void
printtree(Node *np)
{
printnode(np);
if(np->d.type == IPaddr
|| np->d.type == Acctaddr
|| np->d.type == Trustedperm
|| np->d.type == Trustedtemp)
return;
for (np = np->children; np; np = np->sibs)
printtree(np);
}
static int
ipconv(Fmt *f)
{
Cidraddr *ip;
int i, j;
char *p;
ip = va_arg(f->args, Cidraddr*);
p = (char*)&ip->ipaddr;
i = 0;
for (j = ip->mask; j; j <<= 1)
i++;
return fmtprint(f, "%d.%d.%d.%d/%d", p[3]&0xff, p[2]&0xff, p[1]&0xff, p[0]&0xff, i);
}