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remove unused kern/x file

--- a/kern/x

+++ /dev/null

@@ -1,601 +1,0 @@

-#include	<sys/types.h>

-#include	<sys/stat.h>

-#include	<dirent.h>

-#include	<fcntl.h>

-#include	<errno.h>

-#include	<stdio.h> /* for remove, rename */

-#include	<limits.h>

-

-#ifndef NAME_MAX

-#	define NAME_MAX 256

-#endif

-#include	"u.h"

-#include	"lib.h"

-#include	"dat.h"

-#include	"fns.h"

-#include	"error.h"

-

-

-typedef	struct Ufsinfo	Ufsinfo;

-

-enum

-{

-	NUID	= 256,

-	NGID	= 256,

-	MAXPATH	= 1024,

-	MAXCOMP	= 128

-};

-

-struct Ufsinfo

-{

-	int	mode;

-	int	fd;

-	DIR*	dir;

-	ulong	offset;

-	QLock	oq;

-	char nextname[NAME_MAX];

-};

-

-char	*base = "/";

-

-static	Qid	fsqid(char*, struct stat *);

-static	void	fspath(Chan*, char*, char*);

-static	ulong	fsdirread(Chan*, uchar*, int, ulong);

-static	int	fsomode(int);

-

-static char*

-lastelem(Chan *c)

-{

-	char *s, *t;

-

-	s = c2name(c);

-	if((t = strrchr(s, '/')) == nil)

-		return s;

-	if(t[1] == 0)

-		return t;

-	return t+1;

-}

-	

-static Chan*

-fsattach(char *spec)

-{

-	Chan *c;

-	struct stat stbuf;

-	static int devno;

-	Ufsinfo *uif;

-

-	if(stat(base, &stbuf) < 0)

-		error(strerror(errno));

-

-	c = devattach('U', spec);

-

-	uif = mallocz(sizeof(Ufsinfo), 1);

-	uif->mode = stbuf.st_mode;

-

-	c->aux = uif;

-	c->dev = devno++;

-

-	return c;

-}

-

-static Chan*

-fsclone(Chan *c, Chan *nc)

-{

-	Ufsinfo *uif;

-

-	uif = mallocz(sizeof(Ufsinfo), 1);

-	*uif = *(Ufsinfo*)c->aux;

-	nc->aux = uif;

-

-	return nc;

-}

-

-static int

-fswalk1(Chan *c, char *name)

-{

-	struct stat stbuf;

-	char path[MAXPATH];

-	Ufsinfo *uif;

-

-	fspath(c, name, path);

-

-/*	print("** fs walk '%s' -> %s\n", path, name); */

-

-	if(stat(path, &stbuf) < 0)

-		return 0;

-

-	uif = c->aux;

-

-	uif->mode = stbuf.st_mode;

-

-	c->qid = fsqid(path, &stbuf);

-

-	return 1;

-}

-

-static Walkqid*

-fswalk(Chan *c, Chan *nc, char **name, int nname)

-{

-	int i;

-	Walkqid *wq;

-

-	if(nc != nil)

-		panic("fswalk: nc != nil");

-	wq = smalloc(sizeof(Walkqid)+(nname-1)*sizeof(Qid));

-	nc = devclone(c);

-	fsclone(c, nc);

-	wq->clone = nc;

-	for(i=0; i<nname; i++){

-		if(fswalk1(nc, name[i]) == 0)

-			break;

-		wq->qid[i] = nc->qid;

-	}

-	if(i != nname){

-		cclose(nc);

-		wq->clone = nil;

-	}

-	wq->nqid = i;

-	return wq;

-}

-	

-static int

-fsstat(Chan *c, uchar *buf, int n)

-{

-	Dir d;

-	struct stat stbuf;

-	char path[MAXPATH];

-

-	if(n < BIT16SZ)

-		error(Eshortstat);

-

-	fspath(c, 0, path);

-	if(stat(path, &stbuf) < 0)

-		error(strerror(errno));

-

-	d.name = lastelem(c);

-	d.uid = "unknown";

-	d.gid = "unknown";

-	d.qid = c->qid;

-	d.mode = (c->qid.type<<24)|(stbuf.st_mode&0777);

-	d.atime = stbuf.st_atime;

-	d.mtime = stbuf.st_mtime;

-	d.length = stbuf.st_size;

-	d.type = 'U';

-	d.dev = c->dev;

-	return convD2M(&d, buf, n);

-}

-

-static Chan*

-fsopen(Chan *c, int mode)

-{

-	char path[MAXPATH];

-	int m, isdir;

-	Ufsinfo *uif;

-

-	m = mode & (OTRUNC|3);

-	switch(m) {

-	case 0:

-		break;

-	case 1:

-	case 1|16:

-		break;

-	case 2:	

-	case 0|16:

-	case 2|16:

-		break;

-	case 3:

-		break;

-	default:

-		error(Ebadarg);

-	}

-

-	isdir = c->qid.type & QTDIR;

-

-	if(isdir && mode != OREAD)

-		error(Eperm);

-

-	m = fsomode(m & 3);

-	c->mode = openmode(mode);

-

-	uif = c->aux;

-

-	fspath(c, 0, path);

-	if(isdir) {

-		uif->dir = opendir(path);

-		if(uif->dir == 0)

-			error(strerror(errno));

-	}	

-	else {

-		if(mode & OTRUNC)

-			m |= O_TRUNC;

-		uif->fd = open(path, m, 0666);

-

-		if(uif->fd < 0)

-			error(strerror(errno));

-	}

-	uif->offset = 0;

-

-	c->offset = 0;

-	c->flag |= COPEN;

-	return c;

-}

-

-static void

-fscreate(Chan *c, char *name, int mode, ulong perm)

-{

-	int fd, m;

-	char path[MAXPATH];

-	struct stat stbuf;

-	Ufsinfo *uif;

-

-	m = fsomode(mode&3);

-

-	fspath(c, name, path);

-

-	uif = c->aux;

-

-	if(perm & DMDIR) {

-		if(m)

-			error(Eperm);

-

-		if(mkdir(path, perm & 0777) < 0)

-			error(strerror(errno));

-

-		fd = open(path, 0);

-		if(fd >= 0) {

-			chmod(path, perm & 0777);

-			chown(path, uif->uid, uif->uid);

-		}

-		close(fd);

-

-		uif->dir = opendir(path);

-		if(uif->dir == 0)

-			error(strerror(errno));

-	}

-	else {

-		fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0666);

-		if(fd >= 0) {

-			if(m != 1) {

-				close(fd);

-				fd = open(path, m);

-			}

-			chmod(path, perm & 0777);

-			chown(path, uif->uid, uif->gid);

-		}

-		if(fd < 0)

-			error(strerror(errno));

-		uif->fd = fd;

-	}

-

-	if(stat(path, &stbuf) < 0)

-		error(strerror(errno));

-	c->qid = fsqid(path, &stbuf);

-	c->offset = 0;

-	c->flag |= COPEN;

-	c->mode = openmode(mode);

-}

-

-static void

-fsclose(Chan *c)

-{

-	Ufsinfo *uif;

-

-	uif = c->aux;

-

-	if(c->flag & COPEN) {

-		if(c->qid.type & QTDIR)

-			closedir(uif->dir);

-		else

-			close(uif->fd);

-	}

-

-	free(uif);

-}

-

-static long

-fsread(Chan *c, void *va, long n, vlong offset)

-{

-	int fd, r;

-	Ufsinfo *uif;

-

-	if(c->qid.type & QTDIR)

-		return fsdirread(c, va, n, offset);

-

-	uif = c->aux;

-	qlock(&uif->oq);

-	if(waserror()) {

-		qunlock(&uif->oq);

-		nexterror();

-	}

-	fd = uif->fd;

-	if(uif->offset != offset) {

-		r = lseek(fd, offset, 0);

-		if(r < 0)

-			error(strerror(errno));

-		uif->offset = offset;

-	}

-

-	n = read(fd, va, n);

-	if(n < 0)

-		error(strerror(errno));

-

-	uif->offset += n;

-	qunlock(&uif->oq);

-	poperror();

-

-	return n;

-}

-

-static long

-fswrite(Chan *c, void *va, long n, vlong offset)

-{

-	int fd, r;

-	Ufsinfo *uif;

-

-	uif = c->aux;

-

-	qlock(&uif->oq);

-	if(waserror()) {

-		qunlock(&uif->oq);

-		nexterror();

-	}

-	fd = uif->fd;

-	if(uif->offset != offset) {

-		r = lseek(fd, offset, 0);

-		if(r < 0)

-			error(strerror(errno));

-		uif->offset = offset;

-	}

-

-	n = write(fd, va, n);

-	if(n < 0)

-		error(strerror(errno));

-

-	uif->offset += n;

-	qunlock(&uif->oq);

-	poperror();

-

-	return n;

-}

-

-static void

-fsremove(Chan *c)

-{

-	int n;

-	char path[MAXPATH];

-

-	fspath(c, 0, path);

-	if(c->qid.type & QTDIR)

-		n = rmdir(path);

-	else

-		n = remove(path);

-	if(n < 0)

-		error(strerror(errno));

-}

-

-void

-fswstat(Chan *c, uchar *buf, int n)

-{

-	Dir d;

-	struct stat stbuf;

-	char old[MAXPATH], new[MAXPATH], dir[MAXPATH];

-	char strs[MAXPATH*3];

-	Ufsinfo *uif;

-

-	if(convM2D(buf, n, &d, strs) != n)

-		error(Ebadstat);

-	

-	fspath(c, 0, old);

-	if(stat(old, &stbuf) < 0)

-		error(strerror(errno));

-

-	uif = c->aux;

-

-	if(d.name[0] && strcmp(d.name, lastelem(c)) != 0) {

-		fspath(c->parent, 0, dir);

-		fspath(c, 0, old);

-		strcpy(new, old);

-		p = strrchr(new, '/');

-		strcpy(p+1, d.name);

-		if(rename(old, new) < 0)

-			error(strerror(errno));

-	}

-

-	fspath(c, 0, old);

-	if(~d.mode != 0 && (int)(d.mode&0777) != (int)(stbuf.st_mode&0777)) {

-		if(chmod(old, d.mode&0777) < 0)

-			error(strerror(errno));

-		uif->mode &= ~0777;

-		uif->mode |= d.mode&0777;

-	}

-/*

-	p = name2pass(gid, d.gid);

-	if(p == 0)

-		error(Eunknown);

-

-	if(p->id != stbuf.st_gid) {

-		if(chown(old, stbuf.st_uid, p->id) < 0)

-			error(strerror(errno));

-

-		uif->gid = p->id;

-	}

-*/

-}

-

-static Qid

-fsqid(char *p, struct stat *st)

-{

-	Qid q;

-	int dev;

-	ulong h;

-	static int nqdev;

-	static uchar *qdev;

-

-	if(qdev == 0)

-		qdev = mallocz(65536U, 1);

-

-	q.type = 0;

-	if((st->st_mode&S_IFMT) ==  S_IFDIR)

-		q.type = QTDIR;

-

-	dev = st->st_dev & 0xFFFFUL;

-	if(qdev[dev] == 0)

-		qdev[dev] = ++nqdev;

-

-	h = 0;

-	while(*p != '\0')

-		h += *p++ * 13;

-	

-	q.path = (vlong)qdev[dev]<<32;

-	q.path |= h;

-	q.vers = st->st_mtime;

-

-	return q;

-}

-

-static void

-fspath(Chan *c, char *ext, char *path)

-{

-	int i, n;

-	char *comp[MAXCOMP];

-

-	strcpy(path, base);

-	strcat(path, "/");

-	strcat(path, c2name(c));

-	if(ext){

-		strcat(path, "/");

-		strcat(path, ext);

-	}

-	cleanname(path);

-}

-

-static int

-isdots(char *name)

-{

-	if(name[0] != '.')

-		return 0;

-	if(name[1] == '\0')

-		return 1;

-	if(name[1] != '.')

-		return 0;

-	if(name[2] == '\0')

-		return 1;

-	return 0;

-}

-

-static int

-p9readdir(char *name, Ufsinfo *uif)

-{

-	struct dirent *de;

-	

-	if(uif->nextname[0]){

-		strcpy(name, uif->nextname);

-		uif->nextname[0] = 0;

-		return 1;

-	}

-

-	de = readdir(uif->dir);

-	if(de == NULL)

-		return 0;

-		

-	strcpy(name, de->d_name);

-	return 1;

-}

-

-static ulong

-fsdirread(Chan *c, uchar *va, int count, ulong offset)

-{

-	int i;

-	Dir d;

-	long n;

-	char de[NAME_MAX];

-	struct stat stbuf;

-	char path[MAXPATH], dirpath[MAXPATH];

-	Ufsinfo *uif;

-	int n;

-

-	i = 0;

-	uif = c->aux;

-

-	errno = 0;

-	if(uif->offset != offset) {

-		if(offset != 0)

-			error("bad offset in fsdirread");

-		uif->offset = offset;  /* sync offset */

-		uif->nextname[0] = 0;

-		rewinddir(uif->dir);

-	}

-

-	fspath(c, 0, dirpath);

-

-	while(i+BIT16SZ < count) {

-		if(!p9readdir(de, uif))

-			break;

-

-		if(de[0]==0 || isdots(de))

-			continue;

-

-		d.name = de;

-		sprint(path, "%s/%s", dirpath, de);

-		memset(&stbuf, 0, sizeof stbuf);

-

-		if(stat(path, &stbuf) < 0) {

-			fprint(2, "dir: bad path %s\n", path);

-			/* but continue... probably a bad symlink */

-		}

-

-		d.uid = "unknown";

-		d.gid = "unknown";

-		d.qid = fsqid(path, &stbuf);

-		d.mode = (d.qid.type<<24)|(stbuf.st_mode&0777);

-		d.atime = stbuf.st_atime;

-		d.mtime = stbuf.st_mtime;

-		d.length = stbuf.st_size;

-		d.type = 'U';

-		d.dev = c->dev;

-		n = convD2M(&d, (char*)va+i, count-i);

-		if(n == BIT16SZ){

-			strcpy(uif->nextname, de);

-			break;

-		}

-		i += n;

-	}

-	return i;

-}

-

-static int

-fsomode(int m)

-{

-	switch(m) {

-	case 0:			/* OREAD */

-	case 3:			/* OEXEC */

-		return 0;

-	case 1:			/* OWRITE */

-		return 1;

-	case 2:			/* ORDWR */

-		return 2;

-	}

-	error(Ebadarg);

-	return 0;

-}

-

-Dev fsdevtab = {

-	'U',

-	"fs",

-

-	devreset,

-	devinit,

-	devshutdown,

-	fsattach,

-	fswalk,

-	fsstat,

-	fsopen,

-	fscreate,

-	fsclose,

-	fsread,

-	devbread,

-	fswrite,

-	devbwrite,

-	fsremove,

-	fswstat,

-};