X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=mount-setup.c;fp=mount-setup.c;h=4a5e2cc760abcc363bc78f0c1c4761c294869f66;hp=0000000000000000000000000000000000000000;hb=8e27452380193a5f81bfd08a59aab8b07008ba0b;hpb=c9dae904f3a07ae563bd58fb2b39529c1f108915
diff --git a/mount-setup.c b/mount-setup.c
new file mode 100644
index 000000000..4a5e2cc76
--- /dev/null
+++ b/mount-setup.c
@@ -0,0 +1,112 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see .
+***/
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include "mount-setup.h"
+#include "log.h"
+
+enum {
+ MOUNT_WHAT,
+ MOUNT_WHERE,
+ MOUNT_TYPE,
+ MOUNT_OPTIONS,
+ MOUNT_SKIP
+};
+
+static const char *table[] = {
+ "/proc", "/proc", "proc", "rw",
+ "/sys", "/sys", "sysfs", "rw",
+ "cgroup", "/cgroup/debug", "cgroup", "debug",
+ NULL
+};
+
+static int is_mount_point(const char *t) {
+ struct stat a, b;
+ char *copy;
+
+ if (lstat(t, &a) < 0) {
+
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ if (!(copy = strdup(t)))
+ return -ENOMEM;
+
+ if (lstat(dirname(copy), &b) < 0) {
+ free(copy);
+ return -errno;
+ }
+
+ free(copy);
+
+ return a.st_dev != b.st_dev;
+
+}
+
+static int mount_one(const char *t[]) {
+ int r;
+
+ assert(t);
+
+ if ((r = is_mount_point(t[MOUNT_WHERE])) < 0)
+ return r;
+
+ if (r > 0)
+ return 0;
+
+ log_debug("Mounting %s to %s of type %s with options %s.",
+ t[MOUNT_WHAT],
+ t[MOUNT_WHERE],
+ t[MOUNT_TYPE],
+ t[MOUNT_OPTIONS]);
+
+ if (mount(t[MOUNT_WHAT],
+ t[MOUNT_WHERE],
+ t[MOUNT_TYPE],
+ 0,
+ t[MOUNT_OPTIONS]) < 0) {
+ log_error("Failed to mount %s: %s", t[MOUNT_WHERE], strerror(errno));
+ return -errno;
+ }
+
+ return 0;
+}
+
+int mount_setup(void) {
+ int r;
+ const char **t;
+
+ for (t = table; *t; t += MOUNT_SKIP)
+ if ((r = mount_one(t)) < 0)
+ return r;
+
+ return 0;
+}