X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Fpath-util.c;h=cdc61b1a7925d531ee9e62e7133d7c05a905e468;hb=88a60da054759f763e2be7bb88c7f88919c6d46f;hp=8c43d060fb2ed93f1eb008f4c56cb63cfe3352a9;hpb=6feeeab0bc40b5a7f208adf79909fb85e2208e8e;p=elogind.git
diff --git a/src/shared/path-util.c b/src/shared/path-util.c
index 8c43d060f..cdc61b1a7 100644
--- a/src/shared/path-util.c
+++ b/src/shared/path-util.c
@@ -19,15 +19,12 @@
along with systemd; If not, see .
***/
-#include
#include
#include
#include
#include
-#include
#include
#include
-#include
#include
#include "macro.h"
@@ -436,6 +433,10 @@ bool path_equal(const char *a, const char *b) {
}
}
+bool path_equal_or_files_same(const char *a, const char *b) {
+ return path_equal(a, b) || files_same(a, b) > 0;
+}
+
char* path_join(const char *root, const char *path, const char *rest) {
assert(path);
@@ -454,14 +455,11 @@ char* path_join(const char *root, const char *path, const char *rest) {
int path_is_mount_point(const char *t, bool allow_symlink) {
- union file_handle_union h = {
- .handle.handle_bytes = MAX_HANDLE_SZ
- };
-
- int mount_id, mount_id_parent;
- _cleanup_free_ char *parent = NULL;
+ union file_handle_union h = FILE_HANDLE_INIT;
+ int mount_id = -1, mount_id_parent = -1;
struct stat a, b;
int r;
+ _cleanup_close_ int fd = -1;
bool nosupp = false;
/* We are not actually interested in the file handles, but
@@ -471,9 +469,21 @@ int path_is_mount_point(const char *t, bool allow_symlink) {
if (path_equal(t, "/"))
return 1;
- r = name_to_handle_at(AT_FDCWD, t, &h.handle, &mount_id, allow_symlink ? AT_SYMLINK_FOLLOW : 0);
+ fd = openat(AT_FDCWD, t, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|(allow_symlink ? 0 : O_PATH));
+ if (fd < 0) {
+ if (errno == ENOENT)
+ return 0;
+
+ return -errno;
+ }
+
+ r = name_to_handle_at(fd, "", &h.handle, &mount_id, AT_EMPTY_PATH);
if (r < 0) {
- if (IN_SET(errno, ENOSYS, EOPNOTSUPP))
+ if (errno == ENOSYS)
+ /* This kernel does not support name_to_handle_at()
+ * fall back to the traditional stat() logic. */
+ goto fallback;
+ else if (errno == EOPNOTSUPP)
/* This kernel or file system does not support
* name_to_handle_at(), hence fallback to the
* traditional stat() logic */
@@ -484,12 +494,9 @@ int path_is_mount_point(const char *t, bool allow_symlink) {
return -errno;
}
- r = path_get_parent(t, &parent);
- if (r < 0)
- return r;
h.handle.handle_bytes = MAX_HANDLE_SZ;
- r = name_to_handle_at(AT_FDCWD, parent, &h.handle, &mount_id_parent, AT_SYMLINK_FOLLOW);
+ r = name_to_handle_at(fd, "..", &h.handle, &mount_id_parent, 0);
if (r < 0)
if (errno == EOPNOTSUPP)
if (nosupp)
@@ -508,10 +515,7 @@ int path_is_mount_point(const char *t, bool allow_symlink) {
return mount_id != mount_id_parent;
fallback:
- if (allow_symlink)
- r = stat(t, &a);
- else
- r = lstat(t, &a);
+ r = fstatat(fd, "", &a, AT_EMPTY_PATH);
if (r < 0) {
if (errno == ENOENT)
@@ -520,11 +524,8 @@ fallback:
return -errno;
}
- r = path_get_parent(t, &parent);
- if (r < 0)
- return r;
- r = stat(parent, &b);
+ r = fstatat(fd, "..", &b, 0);
if (r < 0)
return -errno;
@@ -556,14 +557,14 @@ int path_is_os_tree(const char *path) {
int r;
/* We use /usr/lib/os-release as flag file if something is an OS */
- p = strappenda(path, "/usr/lib/os-release");
+ p = strjoina(path, "/usr/lib/os-release");
r = access(p, F_OK);
if (r >= 0)
return 1;
/* Also check for the old location in /etc, just in case. */
- p = strappenda(path, "/etc/os-release");
+ p = strjoina(path, "/etc/os-release");
r = access(p, F_OK);
return r >= 0;
@@ -661,7 +662,7 @@ int fsck_exists(const char *fstype) {
const char *checker;
int r;
- checker = strappenda("fsck.", fstype);
+ checker = strjoina("fsck.", fstype);
r = find_binary(checker, true, &p);
if (r < 0)