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conf: recurse into arrays before matching

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When the value looks like an array, recurse into it and do the matching
on the array items instead of the whole value.
This commit is contained in:
Wim Taymans 2026-05-26 09:42:49 +02:00
parent 784a9dd00f
commit f195140702
2 changed files with 33 additions and 9 deletions
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14
doc/dox/config/pipewire.conf.5.md
View file

@ -527,6 +527,7 @@ The general rules object follows the following pattern:
{
# <key> = <value>
# all keys must match the value. ! negates. ~ starts regex.
# if <value> is an array, matching is done on its elements.
#application.process.binary = "teams"
#application.name = "~speech-dispatcher.*"
@ -644,6 +645,19 @@ matches = [
]
```
When the value is an array, the match is performed on the array elements until
one succeeds. For example:
```css
matches = [
{
pipewire.sec.gids = 42
}
]
```
Matches `pipewire.sec.gids = [ 10, 20, 42, 1000 ]`.
# CONTEXT PROPERTIES RULES @IDX@ pipewire.conf context.properties.rules

28
src/pipewire/conf.c
View file

@ -640,12 +640,12 @@ static int load_module(struct pw_context *context, const char *key, const char *
SPA_EXPORT
bool pw_conf_find_match(struct spa_json *arr, const struct spa_dict *props, bool condition)
{
struct spa_json it[1];
struct spa_json it[2];
const char *as = arr->cur;
int az = (int)(arr->end - arr->cur), r, count = 0;
while ((r = spa_json_enter_object(arr, &it[0])) > 0) {
char key[256], val[1024];
char key[256], val[1024], v[1024];
const char *str, *value;
int match = 0, fail = 0;
int len;
@ -691,6 +691,7 @@ bool pw_conf_find_match(struct spa_json *arr, const struct spa_dict *props, bool
if (is_null && str == NULL)
success = !success;
} else {
regex_t preg;
/* only unescape string once or again after modifier */
if (!parse_string) {
memmove(val, value+skip, len-skip);
@ -702,21 +703,30 @@ bool pw_conf_find_match(struct spa_json *arr, const struct spa_dict *props, bool
}
if (reg) {
regex_t preg;
int res;
if ((res = regcomp(&preg, val, REG_EXTENDED | REG_NOSUB)) != 0) {
char errbuf[1024];
regerror(res, &preg, errbuf, sizeof(errbuf));
pw_log_warn("invalid regex %s: %s in '%.*s'",
val, errbuf, az, as);
} else {
if (regexec(&preg, str, 0, NULL, 0) == 0)
success = !success;
regfree(&preg);
reg = false;
}
} else if (strcmp(str, val) == 0) {
success = !success;
}
if (spa_json_begin_array_relax(&it[1], str, strlen(str)) > 0) {
while (spa_json_get_string(&it[1], v, sizeof(v)) > 0) {
if ((reg && regexec(&preg, v, 0, NULL, 0) == 0) ||
spa_streq(v, val)) {
success = !success;
break;
}
}
}
else if ((reg && regexec(&preg, str, 0, NULL, 0) == 0) ||
spa_streq(str, val))
success = !success;
if (reg)
regfree(&preg);
}
if (success) {
match++;