/*-*- 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 <sys/stat.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include <unistd.h> #include "dev-setup.h" #include "log.h" #include "macro.h" #include "util.h" #include "label.h" static int symlink_and_label(const char *old_path, const char *new_path) { int r; assert(old_path); assert(new_path); r = label_context_set(new_path, S_IFLNK); if (r < 0) return r; if (symlink(old_path, new_path) < 0) r = -errno; label_context_clear(); return r; } int dev_setup(const char *prefix) { const char *j, *k; 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"; NULSTR_FOREACH_PAIR(j, k, symlinks) { if (j[0] == '-') { j++; if (access(j, F_OK) < 0) continue; } if (prefix) { _cleanup_free_ char *link_name = NULL; link_name = strjoin(prefix, "/", k, NULL); if (!link_name) return -ENOMEM; symlink_and_label(j, link_name); } else symlink_and_label(j, k); } return 0; }