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path: fix watching the root directory

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If you have a path unit with:
  DirectoryNotEmpty=/foo
and "/foo" does not exist, creating it later escapes the attention of systemd.

When adding watches for parent directories, systemd never adds one for the root
directory. It attempts to add a watch for an empty string instead, which fails.

If the path is "/", we must not trim the slash.
This commit is contained in:
Michal Schmidt 2010-12-01 15:39:52 +01:00 committed by Kay Sievers
parent 550c4dcc41
commit 67575eef76
1 changed files with 5 additions and 5 deletions
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10
src/path.c
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@ -189,7 +189,7 @@ static int path_watch_one(Path *p, PathSpec *s) {
};
bool exists = false;
char *k;
char *k, *slash;
int r;
assert(p);
@ -213,15 +213,15 @@ static int path_watch_one(Path *p, PathSpec *s) {
if ((s->primary_wd = inotify_add_watch(s->inotify_fd, k, flags_table[s->type])) >= 0)
exists = true;
for (;;) {
do {
int flags;
char *slash;
/* This assumes the path was passed through path_kill_slashes()! */
if (!(slash = strrchr(k, '/')))
break;
*slash = 0;
/* Trim the path at the last slash. Keep the slash if it's the root dir. */
slash[slash == k] = 0;
flags = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB;
if (!exists)
@ -229,7 +229,7 @@ static int path_watch_one(Path *p, PathSpec *s) {
if (inotify_add_watch(s->inotify_fd, k, flags) >= 0)
exists = true;
}
} while (slash != k);
return 0;