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core: rework unit name validation and manipulation logic

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A variety of changes:

- Make sure all our calls distuingish OOM from other errors if OOM is
  not the only error possible.

- Be much stricter when parsing escaped paths, do not accept trailing or
  leading escaped slashes.

- Change unit validation to take a bit mask for allowing plain names,
  instance names or template names or an combination thereof.

- Refuse manipulating invalid unit name
This commit is contained in:
Lennart Poettering
2015-05-05 15:06:42 -07:00
parent 6442185ab6
commit 7410616cd9
34 changed files with 1066 additions and 867 deletions
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src/shared/dropin.c
+8 -7
View File
@@ -164,7 +164,7 @@ static int iterate_dir(
}
int unit_file_process_dir(
Set * unit_path_cache,
Set *unit_path_cache,
const char *unit_path,
const char *name,
const char *suffix,
@@ -174,6 +174,7 @@ int unit_file_process_dir(
char ***strv) {
_cleanup_free_ char *path = NULL;
int r;
assert(unit_path);
assert(name);
@@ -184,22 +185,22 @@ int unit_file_process_dir(
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, path))
iterate_dir(path, dependency, consumer, arg, strv);
(void) iterate_dir(path, dependency, consumer, arg, strv);
if (unit_name_is_instance(name)) {
if (unit_name_is_valid(name, UNIT_NAME_INSTANCE)) {
_cleanup_free_ char *template = NULL, *p = NULL;
/* Also try the template dir */
template = unit_name_template(name);
if (!template)
return log_oom();
r = unit_name_template(name, &template);
if (r < 0)
return log_error_errno(r, "Failed to generate template from unit name: %m");
p = strjoin(unit_path, "/", template, suffix, NULL);
if (!p)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, p))
iterate_dir(p, dependency, consumer, arg, strv);
(void) iterate_dir(p, dependency, consumer, arg, strv);
}
return 0;