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authorLennart Poettering <lennart@poettering.net>2015-10-04 17:36:19 +0200
committerLennart Poettering <lennart@poettering.net>2015-10-06 11:52:48 +0200
commit8dd4c05b5495c7ffe0f12ace87e71abe17bd0a0e (patch)
tree30a788ca911facca15b4f1fa8641e78753caa574 /src/libsystemd
parent79c7626d1f239e02152ad698298a1b5d0e9fbacf (diff)
core: add support for naming file descriptors passed using socket activation
This adds support for naming file descriptors passed using socket activation. The names are passed in a new $LISTEN_FDNAMES= environment variable, that matches the existign $LISTEN_FDS= one and contains a colon-separated list of names. This also adds support for naming fds submitted to the per-service fd store using FDNAME= in the sd_notify() message. This also adds a new FileDescriptorName= setting for socket unit files to set the name for fds created by socket units. This also adds a new call sd_listen_fds_with_names(), that is similar to sd_listen_fds(), but also returns the names of the fds. systemd-activate gained the new --fdname= switch to specify a name for testing socket activation. This is based on #1247 by Maciej Wereski. Fixes #1247.
Diffstat (limited to 'src/libsystemd')
-rw-r--r--src/libsystemd/sd-daemon/sd-daemon.c79
1 files changed, 64 insertions, 15 deletions
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
index 5fb0b73d02..437518119b 100644
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ b/src/libsystemd/sd-daemon/sd-daemon.c
@@ -19,25 +19,37 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <netinet/in.h>
-#include <stdlib.h>
#include <errno.h>
-#include <unistd.h>
-#include <string.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stddef.h>
#include <limits.h>
#include <mqueue.h>
+#include <netinet/in.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/un.h>
+#include <unistd.h>
-#include "util.h"
#include "path-util.h"
#include "socket-util.h"
+#include "strv.h"
+#include "util.h"
+
#include "sd-daemon.h"
+static void unsetenv_all(bool unset_environment) {
+
+ if (!unset_environment)
+ return;
+
+ unsetenv("LISTEN_PID");
+ unsetenv("LISTEN_FDS");
+ unsetenv("LISTEN_FDNAMES");
+}
+
_public_ int sd_listen_fds(int unset_environment) {
const char *e;
unsigned n;
@@ -79,12 +91,49 @@ _public_ int sd_listen_fds(int unset_environment) {
r = (int) n;
finish:
- if (unset_environment) {
- unsetenv("LISTEN_PID");
- unsetenv("LISTEN_FDS");
+ unsetenv_all(unset_environment);
+ return r;
+}
+
+_public_ int sd_listen_fds_with_names(int unset_environment, char ***names) {
+ _cleanup_strv_free_ char **l = NULL;
+ bool have_names;
+ int n_names = 0, n_fds;
+ const char *e;
+ int r;
+
+ if (!names)
+ return sd_listen_fds(unset_environment);
+
+ e = getenv("LISTEN_FDNAMES");
+ if (e) {
+ n_names = strv_split_extract(&l, e, ":", EXTRACT_DONT_COALESCE_SEPARATORS);
+ if (n_names < 0) {
+ unsetenv_all(unset_environment);
+ return n_names;
+ }
+
+ have_names = true;
+ } else
+ have_names = false;
+
+ n_fds = sd_listen_fds(unset_environment);
+ if (n_fds <= 0)
+ return n_fds;
+
+ if (have_names) {
+ if (n_names != n_fds)
+ return -EINVAL;
+ } else {
+ r = strv_extend_n(&l, "unknown", n_fds);
+ if (r < 0)
+ return r;
}
- return r;
+ *names = l;
+ l = NULL;
+
+ return n_fds;
}
_public_ int sd_is_fifo(int fd, const char *path) {