shaba/systemd
1
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2025-01-28 21:47:38 +03:00
Code

Merge pull request #6140 from keszybz/rm-rf-symlink

Browse Source 
Allow symlinks to root to be removed
This commit is contained in:
Lennart Poettering 2017-06-18 11:15:13 +02:00 committed by GitHub
commit 99a812ad3b
14 changed files with 41 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/basic/path-util.c
View File

@ -442,8 +442,8 @@ bool path_equal(const char *a, const char *b) {
return path_compare(a, b) == 0;
}
bool path_equal_or_files_same(const char *a, const char *b) {
return path_equal(a, b) || files_same(a, b) > 0;
bool path_equal_or_files_same(const char *a, const char *b, int flags) {
return path_equal(a, b) || files_same(a, b, flags) > 0;
}
char* path_join(const char *root, const char *path, const char *rest) {

2
src/basic/path-util.h
View File

@ -46,7 +46,7 @@ char* path_kill_slashes(char *path);
char* path_startswith(const char *path, const char *prefix) _pure_;
int path_compare(const char *a, const char *b) _pure_;
bool path_equal(const char *a, const char *b) _pure_;
bool path_equal_or_files_same(const char *a, const char *b);
bool path_equal_or_files_same(const char *a, const char *b, int flags);
char* path_join(const char *root, const char *path, const char *rest);
static inline bool path_equal_ptr(const char *a, const char *b) {

2
src/basic/process-util.c
View File

@ -807,7 +807,7 @@ int pid_from_same_root_fs(pid_t pid) {
root = procfs_file_alloca(pid, "root");
return files_same(root, "/proc/1/root");
return files_same(root, "/proc/1/root", 0);
}
bool is_main_thread(void) {

2
src/basic/rm-rf.c
View File

@ -182,7 +182,7 @@ int rm_rf(const char *path, RemoveFlags flags) {
/* We refuse to clean the root file system with this
* call. This is extra paranoia to never cause a really
* seriously broken system. */
if (path_equal_or_files_same(path, "/")) {
if (path_equal_or_files_same(path, "/", AT_SYMLINK_NOFOLLOW)) {
log_error("Attempted to remove entire root file system, and we can't allow that.");
return -EPERM;
}

2
src/basic/socket-util.c
View File

@ -412,7 +412,7 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
return false;
if (a->sockaddr.un.sun_path[0]) {
if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path))
if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, 0))
return false;
} else {
if (a->size != b->size)

6
src/basic/stat-util.c
View File

@ -169,16 +169,16 @@ int path_is_os_tree(const char *path) {
return 1;
}
int files_same(const char *filea, const char *fileb) {
int files_same(const char *filea, const char *fileb, int flags) {
struct stat a, b;
assert(filea);
assert(fileb);
if (stat(filea, &a) < 0)
if (fstatat(AT_FDCWD, filea, &a, flags) < 0)
return -errno;
if (stat(fileb, &b) < 0)
if (fstatat(AT_FDCWD, fileb, &b, flags) < 0)
return -errno;
return a.st_dev == b.st_dev &&

2
src/basic/stat-util.h
View File

@ -49,7 +49,7 @@ int null_or_empty_fd(int fd);
int path_is_read_only_fs(const char *path);
int path_is_os_tree(const char *path);
int files_same(const char *filea, const char *fileb);
int files_same(const char *filea, const char *fileb, int flags);
/* The .f_type field of struct statfs is really weird defined on
* different archs. Let's give its type a name. */

2
src/basic/util.c
View File

@ -541,7 +541,7 @@ int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int
if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
return -ENOMEM;
r = files_same(userns_fd_path, "/proc/self/ns/user");
r = files_same(userns_fd_path, "/proc/self/ns/user", 0);
if (r < 0)
return r;
if (r)

2
src/basic/virt.c
View File

@ -574,7 +574,7 @@ int running_in_chroot(void) {
if (getenv_bool("SYSTEMD_IGNORE_CHROOT") > 0)
return 0;
ret = files_same("/proc/1/root", "/");
ret = files_same("/proc/1/root", "/", 0);
if (ret < 0)
return ret;

6
src/core/socket.c
View File

@ -2528,7 +2528,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value,
else
LIST_FOREACH(port, p, s->ports)
if (p->type == SOCKET_FIFO &&
path_equal_or_files_same(p->path, value+skip)) {
path_equal_or_files_same(p->path, value+skip, 0)) {
socket_port_take_fd(p, fds, fd);
break;
}
@ -2542,7 +2542,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value,
else
LIST_FOREACH(port, p, s->ports)
if (p->type == SOCKET_SPECIAL &&
path_equal_or_files_same(p->path, value+skip)) {
path_equal_or_files_same(p->path, value+skip, 0)) {
socket_port_take_fd(p, fds, fd);
break;
}
@ -2596,7 +2596,7 @@ static int socket_deserialize_item(Unit *u, const char *key, const char *value,
else
LIST_FOREACH(port, p, s->ports)
if (p->type == SOCKET_USB_FUNCTION &&
path_equal_or_files_same(p->path, value+skip)) {
path_equal_or_files_same(p->path, value+skip, 0)) {
socket_port_take_fd(p, fds, fd);
break;
}

2
src/shared/install.c
View File

@ -422,7 +422,7 @@ static bool chroot_symlinks_same(const char *root, const char *wd, const char *a
a = strjoina(path_is_absolute(a) ? root : wd, "/", a);
b = strjoina(path_is_absolute(b) ? root : wd, "/", b);
return path_equal_or_files_same(a, b);
return path_equal_or_files_same(a, b, 0);
}
static int create_symlink(

2
src/systemctl/systemctl.c
View File

@ -5654,7 +5654,7 @@ static int switch_root(int argc, char *argv[], void *userdata) {
/* If the passed init is actually the same as the
* systemd binary, then let's suppress it. */
if (files_same(root_init_path, root_systemd_path) > 0)
if (files_same(root_init_path, root_systemd_path, 0) > 0)
init = NULL;
}

30
src/test/test-path-util.c
View File

@ -118,23 +118,33 @@ static void test_path_equal_root(void) {
/* Make sure that files_same works as expected. */
assert_se(files_same("/", "/") > 0);
assert_se(files_same("/", "//") > 0);
assert_se(files_same("/", "/", 0) > 0);
assert_se(files_same("/", "/", AT_SYMLINK_NOFOLLOW) > 0);
assert_se(files_same("/", "//", 0) > 0);
assert_se(files_same("/", "//", AT_SYMLINK_NOFOLLOW) > 0);
assert_se(files_same("/", "/./") > 0);
assert_se(files_same("/", "/../") > 0);
assert_se(files_same("/", "/./", 0) > 0);
assert_se(files_same("/", "/./", AT_SYMLINK_NOFOLLOW) > 0);
assert_se(files_same("/", "/../", 0) > 0);
assert_se(files_same("/", "/../", AT_SYMLINK_NOFOLLOW) > 0);
assert_se(files_same("/", "/.../") == -ENOENT);
assert_se(files_same("/", "/.../", 0) == -ENOENT);
assert_se(files_same("/", "/.../", AT_SYMLINK_NOFOLLOW) == -ENOENT);
/* The same for path_equal_or_files_same. */
assert_se(path_equal_or_files_same("/", "/"));
assert_se(path_equal_or_files_same("/", "//"));
assert_se(path_equal_or_files_same("/", "/", 0));
assert_se(path_equal_or_files_same("/", "/", AT_SYMLINK_NOFOLLOW));
assert_se(path_equal_or_files_same("/", "//", 0));
assert_se(path_equal_or_files_same("/", "//", AT_SYMLINK_NOFOLLOW));
assert_se(path_equal_or_files_same("/", "/./"));
assert_se(path_equal_or_files_same("/", "/../"));
assert_se(path_equal_or_files_same("/", "/./", 0));
assert_se(path_equal_or_files_same("/", "/./", AT_SYMLINK_NOFOLLOW));
assert_se(path_equal_or_files_same("/", "/../", 0));
assert_se(path_equal_or_files_same("/", "/../", AT_SYMLINK_NOFOLLOW));
assert_se(!path_equal_or_files_same("/", "/.../"));
assert_se(!path_equal_or_files_same("/", "/.../", 0));
assert_se(!path_equal_or_files_same("/", "/.../", AT_SYMLINK_NOFOLLOW));
}
static void test_find_binary(const char *self) {

6
src/test/test-stat-util.c
View File

@ -38,8 +38,10 @@ static void test_files_same(void) {
assert_se(fd >= 0);
assert_se(symlink(name, name_alias) >= 0);
assert_se(files_same(name, name));
assert_se(files_same(name, name_alias));
assert_se(files_same(name, name, 0));
assert_se(files_same(name, name, AT_SYMLINK_NOFOLLOW));
assert_se(files_same(name, name_alias, 0));
assert_se(!files_same(name, name_alias, AT_SYMLINK_NOFOLLOW));
unlink(name);
unlink(name_alias);