Fix: Remove dependency on glibc 2.12 caused by pthread_setname_np

prctl() can be used to set the same attribute set by
pthread_setname_np, but doesn't introduce a dependency on a newer
glibc. Using prctl(PR_SET_NAME) introduces a soft dependency on
Linux 2.6.9. However, the worker won't fail to launch if the call
fails as it is set out of convenience (debugger output).

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/src/common/runas.c b/src/common/runas.c
index 3826c61755ff29997beaac08310021a781abec1d..bc7356b6a6641b9d28a83d1171081a1d0b2ab7d9 100644 (file)
--- a/src/common/runas.c
+++ b/src/common/runas.c
@@ -31,6 +31,7 @@
 #include <sched.h>
 #include <sys/signal.h>
 #include <assert.h>
+#include <sys/prctl.h>
 
 #include <common/common.h>
 #include <common/utils.h>
@@ -322,12 +323,11 @@ int run_as_worker(struct run_as_worker *worker)
        memset(worker->procname, 0, proc_orig_len);
        strncpy(worker->procname, DEFAULT_RUN_AS_WORKER_NAME, proc_orig_len);
 
-       ret = pthread_setname_np(pthread_self(), DEFAULT_RUN_AS_WORKER_NAME);
+       ret = prctl(PR_SET_NAME, DEFAULT_RUN_AS_WORKER_NAME, 0, 0, 0);
        if (ret) {
-               errno = ret;
-               ret = -1;
-               PERROR("pthread_setname_np");
-               return EXIT_FAILURE;
+               /* Don't fail as this is not essential. */
+               PERROR("prctl PR_SET_NAME");
+               ret = 0;
        }
 
        sendret.ret = 0;