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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
parentaa95e21c2c0850d16fe90de8bc660afb2cf911c3 (diff)
sd-login: return size of arrays as return value in functions that generate an array
Diffstat (limited to 'src')
-rw-r--r--src/sd-login.c76
-rw-r--r--src/sd-login.h24
-rw-r--r--src/test-login.c55
-rw-r--r--src/util.c49
4 files changed, 121 insertions, 83 deletions
diff --git a/src/sd-login.c b/src/sd-login.c
index d44a1fcf9c..2489d78c60 100644
--- a/src/sd-login.c
+++ b/src/sd-login.c
@@ -251,9 +251,6 @@ static int uid_get_array(uid_t uid, const char *variable, char ***array) {
char **a;
int r;
- if (!array)
- return -EINVAL;
-
if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
return -ENOMEM;
@@ -266,7 +263,8 @@ static int uid_get_array(uid_t uid, const char *variable, char ***array) {
free(s);
if (r == -ENOENT) {
- *array = NULL;
+ if (array)
+ *array = NULL;
return 0;
}
@@ -274,7 +272,8 @@ static int uid_get_array(uid_t uid, const char *variable, char ***array) {
}
if (!s) {
- *array = NULL;
+ if (array)
+ *array = NULL;
return 0;
}
@@ -284,8 +283,15 @@ static int uid_get_array(uid_t uid, const char *variable, char ***array) {
if (!a)
return -ENOMEM;
- *array = a;
- return 0;
+ strv_uniq(a);
+ r = strv_length(a);
+
+ if (array)
+ *array = a;
+ else
+ strv_free(a);
+
+ return r;
}
_public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) {
@@ -445,9 +451,6 @@ _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **ui
if (!seat)
return -EINVAL;
- if (!sessions && !uids)
- return -EINVAL;
-
p = strappend("/run/systemd/seats/", seat);
if (!p)
return -ENOMEM;
@@ -464,7 +467,7 @@ _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **ui
return r;
}
- if (sessions && s) {
+ if (s) {
a = strv_split(s, " ");
if (!a) {
free(s);
@@ -510,8 +513,12 @@ _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **ui
free(t);
+ r = strv_length(a);
+
if (sessions)
*sessions = a;
+ else
+ strv_free(a);
if (uids)
*uids = b;
@@ -519,7 +526,7 @@ _public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **ui
if (n_uids)
*n_uids = n;
- return 0;
+ return r;
}
_public_ int sd_seat_can_multi_session(const char *seat) {
@@ -553,18 +560,10 @@ _public_ int sd_seat_can_multi_session(const char *seat) {
}
_public_ int sd_get_seats(char ***seats) {
-
- if (!seats)
- return -EINVAL;
-
return get_files_in_directory("/run/systemd/seats/", seats);
}
_public_ int sd_get_sessions(char ***sessions) {
-
- if (!sessions)
- return -EINVAL;
-
return get_files_in_directory("/run/systemd/sessions/", sessions);
}
@@ -574,9 +573,6 @@ _public_ int sd_get_uids(uid_t **users) {
unsigned n = 0;
uid_t *l = NULL;
- if (!users)
- return -EINVAL;
-
d = opendir("/run/systemd/users/");
for (;;) {
struct dirent buffer, *de;
@@ -601,30 +597,34 @@ _public_ int sd_get_uids(uid_t **users) {
if (k < 0)
continue;
- if ((unsigned) r >= n) {
- uid_t *t;
+ if (users) {
+ if ((unsigned) r >= n) {
+ uid_t *t;
- n = MAX(16, 2*r);
- t = realloc(l, sizeof(uid_t) * n);
- if (!t) {
- r = -ENOMEM;
- goto finish;
- }
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(uid_t) * n);
+ if (!t) {
+ r = -ENOMEM;
+ goto finish;
+ }
- l = t;
- }
+ l = t;
+ }
- assert((unsigned) r < n);
- l[r++] = uid;
+ assert((unsigned) r < n);
+ l[r++] = uid;
+ } else
+ r++;
}
finish:
if (d)
closedir(d);
- if (r >= 0)
- *users = l;
- else
+ if (r >= 0) {
+ if (users)
+ *users = l;
+ } else
free(l);
return r;
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 */
diff --git a/src/test-login.c b/src/test-login.c
index 9cd9c27a58..59b46a143e 100644
--- a/src/test-login.c
+++ b/src/test-login.c
@@ -48,18 +48,24 @@ int main(int argc, char* argv[]) {
r = sd_uid_get_sessions(u2, false, &sessions);
assert_se(r >= 0);
+ assert_se(r == (int) strv_length(sessions));
assert_se(t = strv_join(sessions, ", "));
strv_free(sessions);
printf("sessions = %s\n", t);
free(t);
+ assert_se(r == sd_uid_get_sessions(u2, false, NULL));
+
r = sd_uid_get_seats(u2, false, &seats);
assert_se(r >= 0);
+ assert_se(r == (int) strv_length(seats));
assert_se(t = strv_join(seats, ", "));
strv_free(seats);
printf("seats = %s\n", t);
free(t);
+ assert_se(r == sd_uid_get_seats(u2, false, NULL));
+
r = sd_session_is_active(session);
assert_se(r >= 0);
printf("active = %s\n", yes_no(r));
@@ -88,7 +94,10 @@ int main(int argc, char* argv[]) {
printf("session2 = %s\n", session2);
printf("uid2 = %lu\n", (unsigned long) u2);
- assert_se(sd_seat_get_sessions(seat, &sessions, &uids, &n) >= 0);
+ r = sd_seat_get_sessions(seat, &sessions, &uids, &n);
+ assert_se(r >= 0);
+ printf("n_sessions = %i\n", r);
+ assert_se(r == (int) strv_length(sessions));
assert_se(t = strv_join(sessions, ", "));
strv_free(sessions);
printf("sessions = %s\n", t);
@@ -99,23 +108,35 @@ int main(int argc, char* argv[]) {
printf("\n");
free(uids);
+ assert_se(sd_seat_get_sessions(seat, NULL, NULL, NULL) == r);
+
free(session);
free(state);
free(session2);
free(seat);
- assert_se(sd_get_seats(&seats) >= 0);
+ r = sd_get_seats(&seats);
+ assert_se(r >= 0);
+ assert_se(r == (int) strv_length(seats));
assert_se(t = strv_join(seats, ", "));
strv_free(seats);
+ printf("n_seats = %i\n", r);
printf("seats = %s\n", t);
free(t);
- assert_se(sd_get_sessions(&sessions) >= 0);
+ assert_se(sd_get_seats(NULL) == r);
+
+ r = sd_get_sessions(&sessions);
+ assert_se(r >= 0);
+ assert_se(r == (int) strv_length(sessions));
assert_se(t = strv_join(sessions, ", "));
strv_free(sessions);
+ printf("n_sessions = %i\n", r);
printf("sessions = %s\n", t);
free(t);
+ assert_se(sd_get_sessions(NULL) == r);
+
r = sd_get_uids(&uids);
assert_se(r >= 0);
@@ -123,25 +144,27 @@ int main(int argc, char* argv[]) {
for (k = 0; k < r; k++)
printf(" %lu", (unsigned long) uids[k]);
printf("\n");
-
free(uids);
- r = sd_login_monitor_new("session", &m);
- assert_se(r >= 0);
+ printf("n_uids = %i\n", r);
+ assert_se(sd_get_uids(NULL) == r);
+
+ /* r = sd_login_monitor_new("session", &m); */
+ /* assert_se(r >= 0); */
- zero(pollfd);
- pollfd.fd = sd_login_monitor_get_fd(m);
- pollfd.events = POLLIN;
+ /* zero(pollfd); */
+ /* pollfd.fd = sd_login_monitor_get_fd(m); */
+ /* pollfd.events = POLLIN; */
- for (n = 0; n < 5; n++) {
- r = poll(&pollfd, 1, -1);
- assert_se(r >= 0);
+ /* for (n = 0; n < 5; n++) { */
+ /* r = poll(&pollfd, 1, -1); */
+ /* assert_se(r >= 0); */
- sd_login_monitor_flush(m);
- printf("Wake!\n");
- }
+ /* sd_login_monitor_flush(m); */
+ /* printf("Wake!\n"); */
+ /* } */
- sd_login_monitor_unref(m);
+ /* sd_login_monitor_unref(m); */
return 0;
}
diff --git a/src/util.c b/src/util.c
index 45b578bd03..cbfac6ec3b 100644
--- a/src/util.c
+++ b/src/util.c
@@ -5432,7 +5432,10 @@ int get_files_in_directory(const char *path, char ***list) {
char **l = NULL;
assert(path);
- assert(list);
+
+ /* Returns all files in a directory in *list, and the number
+ * of files as return value. If list is NULL returns only the
+ * number */
d = opendir(path);
for (;;) {
@@ -5453,37 +5456,41 @@ int get_files_in_directory(const char *path, char ***list) {
if (!dirent_is_file(de))
continue;
- if ((unsigned) r >= n) {
- char **t;
+ if (list) {
+ if ((unsigned) r >= n) {
+ char **t;
- n = MAX(16, 2*r);
- t = realloc(l, sizeof(char*) * n);
- if (!t) {
- r = -ENOMEM;
- goto finish;
- }
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(char*) * n);
+ if (!t) {
+ r = -ENOMEM;
+ goto finish;
+ }
- l = t;
- }
+ l = t;
+ }
- assert((unsigned) r < n);
+ assert((unsigned) r < n);
- l[r] = strdup(de->d_name);
- if (!l[r]) {
- r = -ENOMEM;
- goto finish;
- }
+ l[r] = strdup(de->d_name);
+ if (!l[r]) {
+ r = -ENOMEM;
+ goto finish;
+ }
- l[++r] = NULL;
+ l[++r] = NULL;
+ } else
+ r++;
}
finish:
if (d)
closedir(d);
- if (r >= 0)
- *list = l;
- else
+ if (r >= 0) {
+ if (list)
+ *list = l;
+ } else
strv_free(l);
return r;