tmpfiles: add new 'e' action which cleans up a dir without creating it
I wanted to add a config line that would empty a directory
without creating it if doesn't exist. Existing actions don't allow
this.
v2: properly add 'e' to needs_glob() and takes_ownership()
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index d868cb5..2053d35 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -94,6 +94,7 @@
/* These ones take globs */
WRITE_FILE = 'w',
+ EMPTY_DIRECTORY = 'e',
SET_XATTR = 't',
RECURSIVE_SET_XATTR = 'T',
SET_ACL = 'a',
@@ -179,6 +180,7 @@
IGNORE_DIRECTORY_PATH,
REMOVE_PATH,
RECURSIVE_REMOVE_PATH,
+ EMPTY_DIRECTORY,
ADJUST_MODE,
RELABEL_PATH,
RECURSIVE_RELABEL_PATH,
@@ -195,6 +197,7 @@
CREATE_FILE,
TRUNCATE_FILE,
CREATE_DIRECTORY,
+ EMPTY_DIRECTORY,
TRUNCATE_DIRECTORY,
CREATE_SUBVOLUME,
CREATE_SUBVOLUME_INHERIT_QUOTA,
@@ -1217,7 +1220,6 @@
case CREATE_SUBVOLUME:
case CREATE_SUBVOLUME_INHERIT_QUOTA:
case CREATE_SUBVOLUME_NEW_QUOTA:
-
RUN_WITH_UMASK(0000)
mkdir_parents_label(i->path, 0755);
@@ -1289,6 +1291,9 @@
log_debug("Quota for subvolume \"%s\" already in place, no change made.", i->path);
}
+ /* fall through */
+
+ case EMPTY_DIRECTORY:
r = path_set_perms(i, i->path);
if (q < 0)
return q;
@@ -1298,7 +1303,6 @@
break;
case CREATE_FIFO:
-
RUN_WITH_UMASK(0000) {
mac_selinux_create_file_prepare(i->path, S_IFIFO);
r = mkfifo(i->path, i->mode);
@@ -1535,47 +1539,20 @@
}
static int remove_item(Item *i) {
- int r = 0;
-
assert(i);
log_debug("Running remove action for entry %c %s", (char) i->type, i->path);
switch (i->type) {
- case CREATE_FILE:
- case TRUNCATE_FILE:
- case CREATE_DIRECTORY:
- case CREATE_SUBVOLUME:
- case CREATE_SUBVOLUME_INHERIT_QUOTA:
- case CREATE_SUBVOLUME_NEW_QUOTA:
- case CREATE_FIFO:
- case CREATE_SYMLINK:
- case CREATE_CHAR_DEVICE:
- case CREATE_BLOCK_DEVICE:
- case IGNORE_PATH:
- case IGNORE_DIRECTORY_PATH:
- case ADJUST_MODE:
- case RELABEL_PATH:
- case RECURSIVE_RELABEL_PATH:
- case WRITE_FILE:
- case COPY_FILES:
- case SET_XATTR:
- case RECURSIVE_SET_XATTR:
- case SET_ACL:
- case RECURSIVE_SET_ACL:
- case SET_ATTRIBUTE:
- case RECURSIVE_SET_ATTRIBUTE:
- break;
-
case REMOVE_PATH:
case TRUNCATE_DIRECTORY:
case RECURSIVE_REMOVE_PATH:
- r = glob_item(i, remove_item_instance, false);
- break;
- }
+ return glob_item(i, remove_item_instance, false);
- return r;
+ default:
+ return 0;
+ }
}
static int clean_item_instance(Item *i, const char* instance) {
@@ -1630,8 +1607,6 @@
}
static int clean_item(Item *i) {
- int r = 0;
-
assert(i);
log_debug("Running clean action for entry %c %s", (char) i->type, i->path);
@@ -1641,19 +1616,17 @@
case CREATE_SUBVOLUME:
case CREATE_SUBVOLUME_INHERIT_QUOTA:
case CREATE_SUBVOLUME_NEW_QUOTA:
+ case EMPTY_DIRECTORY:
case TRUNCATE_DIRECTORY:
case IGNORE_PATH:
case COPY_FILES:
clean_item_instance(i, i->path);
- break;
+ return 0;
case IGNORE_DIRECTORY_PATH:
- r = glob_item(i, clean_item_instance, false);
- break;
+ return glob_item(i, clean_item_instance, false);
default:
- break;
+ return 0;
}
-
- return r;
}
static int process_item_array(ItemArray *array);
@@ -1879,6 +1852,7 @@
case CREATE_SUBVOLUME:
case CREATE_SUBVOLUME_INHERIT_QUOTA:
case CREATE_SUBVOLUME_NEW_QUOTA:
+ case EMPTY_DIRECTORY:
case TRUNCATE_DIRECTORY:
case CREATE_FIFO:
case IGNORE_PATH: