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-rw-r--r--src/shared/dev-setup.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/shared/dev-setup.c b/src/shared/dev-setup.c
new file mode 100644
index 0000000000..1a565d5470
--- /dev/null
+++ b/src/shared/dev-setup.c
@@ -0,0 +1,84 @@
+/*-*- 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;
+}