X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fbasic%2Frm-rf.c;h=156366c7d1487f419697d7ae3808829ccfd1b578;hp=d35d172958fb6ea3f3cc154f72e5d3f3cfff9a76;hb=d93247127eb2e073a6d3b5bcc67bcc4048d674fe;hpb=1cfc78c91965df340cdde100ad6cb3ed50b28927
diff --git a/src/basic/rm-rf.c b/src/basic/rm-rf.c
index d35d17295..156366c7d 100644
--- a/src/basic/rm-rf.c
+++ b/src/basic/rm-rf.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
/***
This file is part of systemd.
@@ -19,14 +17,35 @@
along with systemd; If not, see .
***/
-#include "util.h"
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+//#include "btrfs-util.h"
+#include "cgroup-util.h"
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "log.h"
+#include "macro.h"
+#include "mount-util.h"
#include "path-util.h"
-// #include "btrfs-util.h"
#include "rm-rf.h"
+#include "stat-util.h"
+#include "string-util.h"
+
+static bool is_physical_fs(const struct statfs *sfs) {
+ return !is_temporary_fs(sfs) && !is_cgroup_fs(sfs);
+}
int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
_cleanup_closedir_ DIR *d = NULL;
+ struct dirent *de;
int ret = 0, r;
+ struct statfs sfs;
assert(fd >= 0);
@@ -35,13 +54,13 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
if (!(flags & REMOVE_PHYSICAL)) {
- r = fd_is_temporary_fs(fd);
+ r = fstatfs(fd, &sfs);
if (r < 0) {
safe_close(fd);
- return r;
+ return -errno;
}
- if (!r) {
+ if (is_physical_fs(&sfs)) {
/* We refuse to clean physical file systems
* with this call, unless explicitly
* requested. This is extra paranoia just to
@@ -60,20 +79,11 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
return errno == ENOENT ? 0 : -errno;
}
- for (;;) {
- struct dirent *de;
+ FOREACH_DIRENT_ALL(de, d, return -errno) {
bool is_dir;
struct stat st;
- errno = 0;
- de = readdir(d);
- if (!de) {
- if (errno != 0 && ret == 0)
- ret = -errno;
- return ret;
- }
-
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
+ if (dot_or_dot_dot(de->d_name))
continue;
if (de->d_type == DT_UNKNOWN ||
@@ -116,13 +126,14 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
continue;
}
-#if 0
+#if 0 /// elogind does not support BTRFS this directly
if ((flags & REMOVE_SUBVOLUME) && st.st_ino == 256) {
/* This could be a subvolume, try to remove it */
- r = btrfs_subvol_remove_fd(fd, de->d_name, true);
+
+ r = btrfs_subvol_remove_fd(fd, de->d_name, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
if (r < 0) {
- if (r != -ENOTTY && r != -EINVAL) {
+ if (r != -ENOTTY && r != -EINVAL) {
if (ret == 0)
ret = r;
@@ -138,7 +149,7 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
safe_close(subdir_fd);
continue;
}
- }
+ }
#endif // 0
/* We pass REMOVE_PHYSICAL here, to avoid
@@ -161,6 +172,7 @@ int rm_rf_children(int fd, RemoveFlags flags, struct stat *root_dev) {
}
}
}
+ return ret;
}
int rm_rf(const char *path, RemoveFlags flags) {
@@ -172,23 +184,24 @@ 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(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;
}
+#if 0 /// elogind does not support BTRFS this directly
if ((flags & (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) == (REMOVE_SUBVOLUME|REMOVE_ROOT|REMOVE_PHYSICAL)) {
/* Try to remove as subvolume first */
-#if 0
- r = btrfs_subvol_remove(path, true);
+ r = btrfs_subvol_remove(path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA);
if (r >= 0)
return r;
if (r != -ENOTTY && r != -EINVAL && r != -ENOTDIR)
return r;
-#endif // 0
+
/* Not btrfs or not a subvolume */
}
+#endif // 0
fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
if (fd < 0) {
@@ -200,7 +213,7 @@ int rm_rf(const char *path, RemoveFlags flags) {
if (statfs(path, &s) < 0)
return -errno;
- if (!is_temporary_fs(&s)) {
+ if (is_physical_fs(&s)) {
log_error("Attempted to remove disk file system, and we can't allow that.");
return -EPERM;
}