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-rw-r--r--src/basic/cgroup-util.c3
-rw-r--r--src/basic/copy.c2
-rw-r--r--src/basic/path-util.c25
-rw-r--r--src/basic/path-util.h2
-rw-r--r--src/basic/rm-rf.c2
-rw-r--r--src/basic/socket-util.c2
-rw-r--r--src/gpt-auto-generator/gpt-auto-generator.c2
-rw-r--r--src/nspawn/nspawn-patch-uid.c2
-rw-r--r--src/resolve/resolved-manager.c2
-rw-r--r--src/shared/clean-ipc.c4
-rw-r--r--src/test/test-fs-util.c11
-rw-r--r--src/tmpfiles/tmpfiles.c6
12 files changed, 43 insertions, 20 deletions
diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index d2d18f13f0..6948ed3931 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -182,8 +182,7 @@ int cg_read_subgroup(DIR *d, char **fn) {
if (de->d_type != DT_DIR)
continue;
- if (streq(de->d_name, ".") ||
- streq(de->d_name, ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
b = strdup(de->d_name);
diff --git a/src/basic/copy.c b/src/basic/copy.c
index 9883f5fa31..e9a7efd232 100644
--- a/src/basic/copy.c
+++ b/src/basic/copy.c
@@ -331,7 +331,7 @@ static int fd_copy_directory(
struct stat buf;
int q;
- if (STR_IN_SET(de->d_name, ".", ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (fstatat(dirfd(d), de->d_name, &buf, AT_SYMLINK_NOFOLLOW) < 0) {
diff --git a/src/basic/path-util.c b/src/basic/path-util.c
index 9a51e0d8bc..1313a52c9c 100644
--- a/src/basic/path-util.c
+++ b/src/basic/path-util.c
@@ -699,10 +699,7 @@ bool filename_is_valid(const char *p) {
if (isempty(p))
return false;
- if (streq(p, "."))
- return false;
-
- if (streq(p, ".."))
+ if (dot_or_dot_dot(p))
return false;
e = strchrnul(p, '/');
@@ -720,14 +717,17 @@ bool path_is_safe(const char *p) {
if (isempty(p))
return false;
- if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
+ if (dot_or_dot_dot(p))
+ return false;
+
+ if (startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
return false;
if (strlen(p)+1 > PATH_MAX)
return false;
/* The following two checks are not really dangerous, but hey, they still are confusing */
- if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./"))
+ if (startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./"))
return false;
if (strstr(p, "//"))
@@ -892,3 +892,16 @@ int systemd_installation_has_version(const char *root, unsigned minimal_version)
return false;
}
+
+bool dot_or_dot_dot(const char *path) {
+ if (!path)
+ return false;
+ if (path[0] != '.')
+ return false;
+ if (path[1] == 0)
+ return true;
+ if (path[1] != '.')
+ return false;
+
+ return path[2] == 0;
+}
diff --git a/src/basic/path-util.h b/src/basic/path-util.h
index 349cdac7d6..35aef3adc8 100644
--- a/src/basic/path-util.h
+++ b/src/basic/path-util.h
@@ -141,3 +141,5 @@ bool is_device_path(const char *path);
bool is_deviceallow_pattern(const char *path);
int systemd_installation_has_version(const char *root, unsigned minimal_version);
+
+bool dot_or_dot_dot(const char *path);
diff --git a/src/basic/rm-rf.c b/src/basic/rm-rf.c
index 07d42f78dd..08497af729 100644
--- a/src/basic/rm-rf.c
+++ b/src/basic/rm-rf.c
@@ -83,7 +83,7 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
bool is_dir;
struct stat st;
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (de->d_type == DT_UNKNOWN ||
diff --git a/src/basic/socket-util.c b/src/basic/socket-util.c
index 77f81a60ba..17e90a8994 100644
--- a/src/basic/socket-util.c
+++ b/src/basic/socket-util.c
@@ -877,7 +877,7 @@ bool ifname_valid(const char *p) {
if (strlen(p) >= IFNAMSIZ)
return false;
- if (STR_IN_SET(p, ".", ".."))
+ if (dot_or_dot_dot(p))
return false;
while (*p) {
diff --git a/src/gpt-auto-generator/gpt-auto-generator.c b/src/gpt-auto-generator/gpt-auto-generator.c
index e61ef8f249..b958070c90 100644
--- a/src/gpt-auto-generator/gpt-auto-generator.c
+++ b/src/gpt-auto-generator/gpt-auto-generator.c
@@ -658,7 +658,7 @@ static int get_block_device_harder(const char *path, dev_t *dev) {
FOREACH_DIRENT_ALL(de, d, return -errno) {
- if (STR_IN_SET(de->d_name, ".", ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (!IN_SET(de->d_type, DT_LNK, DT_UNKNOWN))
diff --git a/src/nspawn/nspawn-patch-uid.c b/src/nspawn/nspawn-patch-uid.c
index ded5866d05..1a3f129db0 100644
--- a/src/nspawn/nspawn-patch-uid.c
+++ b/src/nspawn/nspawn-patch-uid.c
@@ -375,7 +375,7 @@ static int recurse_fd(int fd, bool donate_fd, const struct stat *st, uid_t shift
FOREACH_DIRENT_ALL(de, d, r = -errno; goto finish) {
struct stat fst;
- if (STR_IN_SET(de->d_name, ".", ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (fstatat(dirfd(d), de->d_name, &fst, AT_SYMLINK_NOFOLLOW) < 0) {
diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index 0954641c20..667774b906 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -1349,7 +1349,7 @@ void manager_cleanup_saved_user(Manager *m) {
if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG))
continue;
- if (STR_IN_SET(de->d_name, ".", ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
r = parse_ifindex(de->d_name, &ifindex);
diff --git a/src/shared/clean-ipc.c b/src/shared/clean-ipc.c
index f2d1555c13..f59f6f23ae 100644
--- a/src/shared/clean-ipc.c
+++ b/src/shared/clean-ipc.c
@@ -225,7 +225,7 @@ static int clean_posix_shm_internal(DIR *dir, uid_t uid, gid_t gid) {
FOREACH_DIRENT_ALL(de, dir, goto fail) {
struct stat st;
- if (STR_IN_SET(de->d_name, "..", "."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (fstatat(dirfd(dir), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
@@ -310,7 +310,7 @@ static int clean_posix_mq(uid_t uid, gid_t gid) {
struct stat st;
char fn[1+strlen(de->d_name)+1];
- if (STR_IN_SET(de->d_name, "..", "."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (fstatat(dirfd(dir), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
diff --git a/src/test/test-fs-util.c b/src/test/test-fs-util.c
index 4cb465d0d2..e774f567e0 100644
--- a/src/test/test-fs-util.c
+++ b/src/test/test-fs-util.c
@@ -305,12 +305,23 @@ static void test_var_tmp(void) {
}
}
+static void test_dot_or_dot_dot(void) {
+ assert_se(!dot_or_dot_dot(NULL));
+ assert_se(!dot_or_dot_dot(""));
+ assert_se(!dot_or_dot_dot("xxx"));
+ assert_se(dot_or_dot_dot("."));
+ assert_se(dot_or_dot_dot(".."));
+ assert_se(!dot_or_dot_dot(".foo"));
+ assert_se(!dot_or_dot_dot("..foo"));
+}
+
int main(int argc, char *argv[]) {
test_unlink_noerrno();
test_readlink_and_make_absolute();
test_get_files_in_directory();
test_var_tmp();
test_chase_symlinks();
+ test_dot_or_dot_dot();
return 0;
}
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index f4ce9791fb..c4f4d46ca1 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -385,7 +385,7 @@ static int dir_cleanup(
usec_t age;
_cleanup_free_ char *sub_path = NULL;
- if (STR_IN_SET(dent->d_name, ".", ".."))
+ if (dot_or_dot_dot(dent->d_name))
continue;
if (fstatat(dirfd(d), dent->d_name, &s, AT_SYMLINK_NOFOLLOW) < 0) {
@@ -1070,9 +1070,7 @@ static int item_do_children(Item *i, const char *path, action_t action) {
_cleanup_free_ char *p = NULL;
int q;
- errno = 0;
-
- if (STR_IN_SET(de->d_name, ".", ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
p = strjoin(path, "/", de->d_name);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-12 00:44:25 +0000