static int
fsdirstat(char *path, int dev, Dir *d)
{
int fd;
struct stat st;
if(stat(path, &st) < 0 && lstat(path, &st) < 0)
return -1;
d->name = lastelem(path);
d->uid = uidtoname(st.st_uid);
d->gid = gidtoname(st.st_gid);
d->muid = "";
d->qid = fsqid(&st);
d->mode = (d->qid.type<<24) | (st.st_mode&0777);
d->atime = st.st_atime;
d->mtime = st.st_mtime;
d->length = st.st_size;
if(S_ISBLK(st.st_mode) && (fd = open(path, O_RDONLY)) >= 0){
d->length = disksize(fd, &st);
close(fd);
}
// devmnt leaves 1-9 unused so that we can steal them.
// it is easier for all involved if #Z shows M as the file type instead of Z.
// dev is c->dev, either 1 (#Z) or 2 (#Zplan9).
d->type = 'M';
d->dev = dev;
return 0;
}
static Chan*
fsattach(char *spec)
{
struct stat st;
Chan *c;
UnixFd *ufd;
int dev;
dev = 1;
if(spec && spec[0]){
snprint(up->genbuf, sizeof up->genbuf, "no file system #%C%s", FsChar, spec);
error(up->genbuf);
}
if(stat("/", &st) < 0)
oserror();
c = devattach(FsChar, 0);
ufd = mallocz(sizeof(UnixFd), 1);
ufd->path = newpath("/");
ufd->fd = -1;
c->aux = ufd;
c->dev = dev;
c->qid = fsqid(&st);
if(Trace)
print("fsattach /\n");
return c;
}
static int
fswalk1(Chan *c, char *name)
{
struct stat st;
char *path;
UnixFd *ufd;
ufd = c->aux;
if(strcmp(name, "..") == 0 && strcmp(ufd->path->s, "/") == 0)
return 0;
path = fspath(c, name);
if(stat(path, &st) < 0){
if(Trace)
print("fswalk1 %s (%s)\n", path, strerror(errno));
free(path);
return -1;
}
if(Trace)
print("fswalk1 %s\n", path);
free(path);
c->qid = fsqid(&st);
return 0;
}
static Chan*
fsattach(char *spec)
{
struct stat st;
Chan *c;
UnixFd *ufd;
int plan9, dev;
dev = 1;
plan9 = 0;
if(spec && spec[0]){
if(strcmp(spec, "plan9") == 0) {
plan9 = 1;
dev = 2;
} else{
snprint(up->genbuf, sizeof up->genbuf, "no file system #%C%s", FsChar, spec);
error(up->genbuf);
}
}
if(plan9){
if(localroot == nil)
error("no #Zplan9 root without -r");
if(stat(localroot, &st) < 0)
oserror();
}else{
if(stat("/", &st) < 0)
oserror();
}
c = devattach(FsChar, spec);
ufd = mallocz(sizeof(UnixFd), 1);
ufd->path = newpath("/");
ufd->plan9 = plan9;
ufd->fd = -1;
c->aux = ufd;
c->dev = dev;
c->qid = fsqid(&st);
if(Trace)
print("fsattach /\n");
return c;
}
static void
fscreate(Chan *c, char *name, int mode, ulong perm)
{
char *path, *path0;
int fd, mm;
UnixFd *ufd;
struct stat st;
ufd = c->aux;
if(Trace)
print("fscreate %s %#x %#o\n", ufd->path->s, mode, perm);
if(!(c->qid.type & QTDIR))
error(Enotdir);
if(mode & ~(OTRUNC|ORCLOSE|3))
error(Ebadarg);
if(perm & ~(DMDIR|0777))
error(Ebadarg);
path0 = fspath(c, nil);
path = fspath(c, name);
if(waserror()){
free(path);
free(path0);
nexterror();
}
if(stat(path0, &st) < 0)
oserror();
if(perm & DMDIR){
if(mode != OREAD)
error(Eperm);
/* have to do the minimum 0400 so we can open it */
if(mkdir(path, (0400 | perm) & 0777) < 0)
oserror();
if((fd = open(path, 0)) < 0)
oserror();
fchown(fd, -1, st.st_gid);
if(fstat(fd, &st) < 0){
close(fd);
oserror();
}
if((ufd->dir = opendir(path)) == nil) {
/* arguably we should set the mode here too
* but it's hard to see that this case
* will ever happen
*/
close(fd);
oserror();
}
// Be like Plan 9 file servers: inherit mode bits
// and group from parent.
fchmod(fd, perm & st.st_mode & 0777);
close(fd);
ufd->diroffset = 0;
ufd->nextde = nil;
}else{
mm = mode & 3;
if(mode & OTRUNC)
mm |= O_TRUNC;
if((fd = open(path, mm|O_CREAT|O_EXCL, 0666)) < 0)
oserror();
// Be like Plan 9 file servers: inherit mode bits
// and group from parent.
fchmod(fd, perm & st.st_mode & 0777);
fchown(fd, -1, st.st_gid);
if(fstat(fd, &st) < 0){
close(fd);
oserror();
}
ufd->fd = fd;
}
free(path);
free(path0);
poperror();
ufd->path = addelem(ufd->path, name, nil);
c->qid = fsqid(&st);
c->offset = 0;
c->flag |= COPEN;
c->mode = openmode(mode);
}