Npfcall*
diod_symlink(Npfid *fid, Npstr *name, Npstr *symtgt, u32 gid)
{
Fid *f = fid->aux;
Npfcall *ret = NULL;
char *target = NULL, *npath = NULL;
Npqid qid;
struct stat sb;
mode_t saved_umask;
int created = 0;
if ((f->xflags & XFLAGS_RO)) {
np_uerror (EROFS);
goto error_quiet;
}
if (!(npath = _mkpath(f->path, name))) {
np_uerror (ENOMEM);
goto error;
}
if (!(target = np_strdup (symtgt))) {
np_uerror (ENOMEM);
goto error;
}
saved_umask = umask(0);
if (symlink (target, npath) < 0) {
np_uerror (errno);
goto error_quiet;
}
created = 1;
umask(saved_umask);
if (lstat (npath, &sb) < 0) {
np_uerror (errno);
goto error; /* shouldn't happen? */
}
_ustat2qid (&sb, &qid);
if (!((ret = np_create_rsymlink (&qid)))) {
np_uerror (ENOMEM);
goto error;
}
free (npath);
free (target);
return ret;
error:
errn (np_rerror (), "diod_symlink %s@%s:%s/%.*s",
fid->user->uname, np_conn_get_client_id (fid->conn), f->path,
name->len, name->str);
error_quiet:
if (created && npath)
(void)unlink (npath);
if (npath)
free (npath);
if (target)
free (target);
if (ret)
free (ret);
return NULL;
}
Npfcall*
diod_symlink(Npfid *fid, Npstr *name, Npstr *symtgt, u32 gid)
{
Npsrv *srv = fid->conn->srv;
Fid *f = fid->aux;
Npfcall *ret;
char *target = NULL;
Path npath = NULL;
Npqid qid;
struct stat sb;
if ((f->flags & DIOD_FID_FLAGS_ROFS)) {
np_uerror (EROFS);
goto error_quiet;
}
if (!(npath = path_append (srv, f->path, name))) {
np_uerror (ENOMEM);
goto error;
}
if (!(target = np_strdup (symtgt))) {
np_uerror (ENOMEM);
goto error;
}
if (symlink (target, path_s (npath)) < 0 || lstat (path_s (npath),
&sb) < 0) {
np_uerror (errno);
goto error_quiet;
}
diod_ustat2qid (&sb, &qid);
if (!((ret = np_create_rsymlink (&qid)))) {
(void)unlink (path_s (npath));
np_uerror (ENOMEM);
goto error;
}
path_decref (srv, npath);
free (target);
return ret;
error:
errn (np_rerror (), "diod_symlink %s@%s:%s/%.*s",
fid->user->uname, np_conn_get_client_id (fid->conn),
path_s (f->path), name->len, name->str);
error_quiet:
if (npath)
path_decref (srv, npath);
if (target)
free (target);
return NULL;
}
static void
test_rsymlink (void)
{
Npfcall *fc, *fc2;
struct p9_qid qid = { 1, 2, 3 };
if (!(fc = np_create_rsymlink (&qid)))
msg_exit ("out of memory");
fc2 = _rcv_buf (fc, P9_RSYMLINK, __FUNCTION__);
assert (fc->u.rsymlink.qid.type == fc2->u.rsymlink.qid.type);
assert (fc->u.rsymlink.qid.version == fc2->u.rsymlink.qid.version);
assert (fc->u.rsymlink.qid.path == fc2->u.rsymlink.qid.path);
free (fc);
free (fc2);
}
