chiark
/
gitweb
/
~ianmdlvl
/
elogind.git
/ commitdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
| commitdiff |
tree
raw
|
patch
|
inline
| side by side (parent:
014a9c7
)
path-util: in path_is_mount_point() fall back to the classic stat() test if fs does...
author
Lennart Poettering
<lennart@poettering.net>
Tue, 4 Sep 2012 23:37:57 +0000
(16:37 -0700)
committer
Lennart Poettering
<lennart@poettering.net>
Tue, 4 Sep 2012 23:37:57 +0000
(16:37 -0700)
src/shared/path-util.c
patch
|
blob
|
history
diff --git
a/src/shared/path-util.c
b/src/shared/path-util.c
index 4cb0b03c5a55c8d0af3b36c078788cfb89d14286..2dddc8f2f689001e4b5dbd8dab206a9c01d5b508 100644
(file)
--- a/
src/shared/path-util.c
+++ b/
src/shared/path-util.c
@@
-335,6
+335,7
@@
int path_is_mount_point(const char *t, bool allow_symlink) {
int r;
struct file_handle *h;
int mount_id, mount_id_parent;
int r;
struct file_handle *h;
int mount_id, mount_id_parent;
+ struct stat a, b;
/* We are not actually interested in the file handles, but
* name_to_handle_at() also passes us the mount ID, hence use
/* We are not actually interested in the file handles, but
* name_to_handle_at() also passes us the mount ID, hence use
@@
-348,6
+349,12
@@
int path_is_mount_point(const char *t, bool allow_symlink) {
r = name_to_handle_at(AT_FDCWD, t, h, &mount_id, allow_symlink ? AT_SYMLINK_FOLLOW : 0);
if (r < 0) {
r = name_to_handle_at(AT_FDCWD, t, h, &mount_id, allow_symlink ? AT_SYMLINK_FOLLOW : 0);
if (r < 0) {
+ if (errno == ENOTSUP)
+ /* This file system does not support
+ * name_to_handle_at(), hence fallback to the
+ * traditional stat() logic */
+ goto fallback;
+
if (errno == ENOENT)
return 0;
if (errno == ENOENT)
return 0;
@@
-362,11
+369,38
@@
int path_is_mount_point(const char *t, bool allow_symlink) {
r = name_to_handle_at(AT_FDCWD, parent, h, &mount_id_parent, 0);
free(parent);
r = name_to_handle_at(AT_FDCWD, parent, h, &mount_id_parent, 0);
free(parent);
+ if (r < 0) {
+ /* The parent can't do name_to_handle_at() but the
+ * directory we are interested in can? If so, it must
+ * be a mount point */
+ if (errno == ENOTSUP)
+ return 1;
+
+ return -errno;
+ }
+
+ return mount_id != mount_id_parent;
+
+fallback:
+ if (allow_symlink)
+ r = stat(t, &a);
+ else
+ r = lstat(t, &b);
+
if (r < 0)
return -errno;
if (r < 0)
return -errno;
+ r = path_get_parent(t, &parent);
+ if (r < 0)
+ return r;
- return mount_id != mount_id_parent;
+ r = lstat(parent, &b);
+ free(parent);
+
+ if (r < 0)
+ return -errno;
+
+ return a.st_dev != b.st_dev;
}
int path_is_read_only_fs(const char *path) {
}
int path_is_read_only_fs(const char *path) {