dev-setup.c revision b5efdb8af40ea759a1ea584c1bc44ecc81dd00ce
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010-2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include "alloc-util.h"
#include "dev-setup.h"
#include "label.h"
#include "path-util.h"
#include "user-util.h"
#include "util.h"
int dev_setup(const char *prefix, uid_t uid, gid_t gid) {
static const char symlinks[] =
"-/proc/kcore\0" "/dev/core\0"
"/proc/self/fd\0" "/dev/fd\0"
"/proc/self/fd/0\0" "/dev/stdin\0"
"/proc/self/fd/1\0" "/dev/stdout\0"
"/proc/self/fd/2\0" "/dev/stderr\0";
const char *j, *k;
int r;
NULSTR_FOREACH_PAIR(j, k, symlinks) {
_cleanup_free_ char *link_name = NULL;
const char *n;
if (j[0] == '-') {
j++;
if (access(j, F_OK) < 0)
continue;
}
if (prefix) {
link_name = prefix_root(prefix, k);
if (!link_name)
return -ENOMEM;
n = link_name;
} else
n = k;
r = symlink_label(j, n);
if (r < 0)
log_debug_errno(r, "Failed to symlink %s to %s: %m", j, n);
if (uid != UID_INVALID || gid != GID_INVALID)
if (lchown(n, uid, gid) < 0)
log_debug_errno(errno, "Failed to chown %s: %m", n);
}
return 0;
}