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load-fragment: a few modernizations

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This commit is contained in:
Lennart Poettering 2012-07-03 16:09:36 +02:00
parent f6c13ce47e
commit 9946996cda
6 changed files with 52 additions and 25 deletions
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3
TODO
View File

@ -22,6 +22,9 @@ Bugfixes:
Features:
* load-fragment: when loading a unit file via a chain of symlinks
verify that it isn't masked via any of the names traversed.
* journald: _BOOT_ID triggers too many collisions.
* journald: we currently rotate only after MaxUse+MaxFilesize has been reached.

51
src/core/load-fragment.c
View File

@ -2047,21 +2047,24 @@ static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
}
/* Try to open the file name, but don't if its a symlink */
if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
if (fd >= 0)
break;
if (errno != ELOOP)
return -errno;
/* Hmm, so this is a symlink. Let's read the name, and follow it manually */
if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
r = readlink_and_make_absolute(*filename, &target);
if (r < 0)
return r;
free(*filename);
*filename = target;
}
if (!(f = fdopen(fd, "re"))) {
f = fdopen(fd, "re");
if (!f) {
r = -errno;
close_nointr_nofail(fd);
return r;
@ -2085,7 +2088,8 @@ static int merge_by_names(Unit **u, Set *names, const char *id) {
/* First try to merge in the other name into our
* unit */
if ((r = unit_merge_by_name(*u, k)) < 0) {
r = unit_merge_by_name(*u, k);
if (r < 0) {
Unit *other;
/* Hmm, we couldn't merge the other unit into
@ -2095,11 +2099,13 @@ static int merge_by_names(Unit **u, Set *names, const char *id) {
other = manager_get_unit((*u)->manager, k);
free(k);
if (other)
if ((r = unit_merge(other, *u)) >= 0) {
if (other) {
r = unit_merge(other, *u);
if (r >= 0) {
*u = other;
return merge_by_names(u, names, NULL);
}
}
return r;
}
@ -2130,12 +2136,14 @@ static int load_from_path(Unit *u, const char *path) {
if (path_is_absolute(path)) {
if (!(filename = strdup(path))) {
filename = strdup(path);
if (!filename) {
r = -ENOMEM;
goto finish;
}
if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
r = open_follow(&filename, &f, symlink_names, &id);
if (r < 0) {
free(filename);
filename = NULL;
@ -2151,7 +2159,8 @@ static int load_from_path(Unit *u, const char *path) {
/* Instead of opening the path right away, we manually
* follow all symlinks and add their name to our unit
* name set while doing so */
if (!(filename = path_make_absolute(path, *p))) {
filename = path_make_absolute(path, *p);
if (!filename) {
r = -ENOMEM;
goto finish;
}
@ -2163,8 +2172,6 @@ static int load_from_path(Unit *u, const char *path) {
r = open_follow(&filename, &f, symlink_names, &id);
if (r < 0) {
char *sn;
free(filename);
filename = NULL;
@ -2172,9 +2179,7 @@ static int load_from_path(Unit *u, const char *path) {
goto finish;
/* Empty the symlink names for the next run */
while ((sn = set_steal_first(symlink_names)))
free(sn);
set_clear_free(symlink_names);
continue;
}
@ -2189,7 +2194,8 @@ static int load_from_path(Unit *u, const char *path) {
}
merged = u;
if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
r = merge_by_names(&merged, symlink_names, id);
if (r < 0)
goto finish;
if (merged != u) {
@ -2252,7 +2258,8 @@ int unit_load_fragment(Unit *u) {
/* First, try to find the unit under its id. We always look
* for unit files in the default directories, to make it easy
* to override things by placing things in /etc/systemd/system */
if ((r = load_from_path(u, u->id)) < 0)
r = load_from_path(u, u->id);
if (r < 0)
return r;
/* Try to find an alias we can load this with */
@ -2262,7 +2269,8 @@ int unit_load_fragment(Unit *u) {
if (t == u->id)
continue;
if ((r = load_from_path(u, t)) < 0)
r = load_from_path(u, t);
if (r < 0)
return r;
if (u->load_state != UNIT_STUB)
@ -2272,7 +2280,8 @@ int unit_load_fragment(Unit *u) {
/* And now, try looking for it under the suggested (originally linked) path */
if (u->load_state == UNIT_STUB && u->fragment_path) {
if ((r = load_from_path(u, u->fragment_path)) < 0)
r = load_from_path(u, u->fragment_path);
if (r < 0)
return r;
if (u->load_state == UNIT_STUB) {
@ -2288,7 +2297,8 @@ int unit_load_fragment(Unit *u) {
if (u->load_state == UNIT_STUB && u->instance) {
char *k;
if (!(k = unit_name_template(u->id)))
k = unit_name_template(u->id);
if (!k)
return -ENOMEM;
r = load_from_path(u, k);
@ -2303,7 +2313,8 @@ int unit_load_fragment(Unit *u) {
if (t == u->id)
continue;
if (!(k = unit_name_template(t)))
k = unit_name_template(t);
if (!k)
return -ENOMEM;
r = load_from_path(u, k);

15
src/shared/hashmap.c
View File

@ -277,11 +277,7 @@ void hashmap_free(Hashmap*h) {
}
void hashmap_free_free(Hashmap *h) {
void *p;
while ((p = hashmap_steal_first(h)))
free(p);
hashmap_clear_free(h);
hashmap_free(h);
}
@ -293,6 +289,15 @@ void hashmap_clear(Hashmap *h) {
remove_entry(h, h->iterate_list_head);
}
void hashmap_clear_free(Hashmap *h) {
void *p;
assert(h);
while ((p = hashmap_steal_first(h)))
free(p);
}
static struct hashmap_entry *hash_scan(Hashmap *h, unsigned hash, const void *key) {
struct hashmap_entry *e;
assert(h);

2
src/shared/hashmap.h
View File

@ -71,6 +71,8 @@ void *hashmap_iterate_backwards(Hashmap *h, Iterator *i, const void **key);
void *hashmap_iterate_skip(Hashmap *h, const void *key, Iterator *i);
void hashmap_clear(Hashmap *h);
void hashmap_clear_free(Hashmap *h);
void *hashmap_steal_first(Hashmap *h);
void *hashmap_steal_first_key(Hashmap *h);
void* hashmap_first(Hashmap *h);

4
src/shared/set.c
View File

@ -116,3 +116,7 @@ Set* set_copy(Set *s) {
void set_clear(Set *s) {
hashmap_clear(MAKE_HASHMAP(s));
}
void set_clear_free(Set *s) {
hashmap_clear_free(MAKE_HASHMAP(s));
}

2
src/shared/set.h
View File

@ -56,6 +56,8 @@ void *set_iterate_backwards(Set *s, Iterator *i);
void *set_iterate_skip(Set *s, void *value, Iterator *i);
void set_clear(Set *s);
void set_clear_free(Set *s);
void *set_steal_first(Set *s);
void* set_first(Set *s);
void* set_last(Set *s);