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authorLennart Poettering <lennart@poettering.net>2011-07-29 03:08:49 +0200
committerLennart Poettering <lennart@poettering.net>2011-07-29 03:14:06 +0200
commitd60ef5265063914ca1502e56f77fd7d70e975da3 (patch)
tree8e3308de4f3edbfcd2636f786cf5314a8504a021 /src/sd-login.h
parentaa95e21c2c0850d16fe90de8bc660afb2cf911c3 (diff)
sd-login: return size of arrays as return value in functions that generate an array
Diffstat (limited to 'src/sd-login.h')
-rw-r--r--src/sd-login.h24
1 files changed, 16 insertions, 8 deletions
diff --git a/src/sd-login.h b/src/sd-login.h
index 1623a7dbf6..7102eb88e0 100644
--- a/src/sd-login.h
+++ b/src/sd-login.h
@@ -32,7 +32,8 @@
*
* Free the data we return with libc free().
*
- * We return error codes as negative errno, kernel-style.
+ * We return error codes as negative errno, kernel-style. 0 or
+ * positive on success.
*
* These functions access data in /proc, /sys/fs/cgroup and /run. All
* of these are virtual file systems, hence the accesses are
@@ -59,12 +60,14 @@ int sd_uid_get_state(uid_t uid, char**state);
* look for active sessions only. */
int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat);
-/* Return sessions of user. If require_active is true will look
- * for active sessions only. */
+/* Return sessions of user. If require_active is true will look for
+ * active sessions only. Returns number of sessions as return
+ * value. If sessions is NULL will just return number of sessions. */
int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions);
/* Return seats of user is on. If require_active is true will look for
- * active seats only. */
+ * active seats only. Returns number of seats. If seats is NULL will
+ * just return number of seats.*/
int sd_uid_get_seats(uid_t uid, int require_active, char ***seats);
/* Return 1 if the session is a active */
@@ -79,19 +82,24 @@ int sd_session_get_seat(const char *session, char **seat);
/* Return active session and user of seat */
int sd_seat_get_active(const char *seat, char **session, uid_t *uid);
-/* Return sessions and users on seat */
+/* Return sessions and users on seat. Returns number of sessions as
+ * return value. If sessions is NULL returs only the number of
+ * sessions. */
int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uid, unsigned *n_uids);
/* Return whether the seat is multi-session capable */
int sd_seat_can_multi_session(const char *seat);
-/* Get all seats */
+/* Get all seats, store in *seats. Returns the number of seats. If
+ * seats is NULL only returns number of seats. */
int sd_get_seats(char ***seats);
-/* Get all sessions */
+/* Get all sessions, store in *seessions. Returns the number of
+ * sessions. If sessions is NULL only returns number of sessions. */
int sd_get_sessions(char ***sessions);
-/* Get all logged in users */
+/* Get all logged in users, store in *users. Returns the number of
+ * users. If users is NULL only returns the number of users. */
int sd_get_uids(uid_t **users);
/* Monitor object */