[beast: 16/18] LAUNCHERS: abort if seteuid/setreuid failed to drop priviledges

[Tim Janik <timj src gnome org>]

commit 90a498e67a8fab2c265edc6c6e630d9cf5ae5ae3
Author: Tim Janik <timj gnu org>
Date:   Thu Sep 24 22:02:22 2015 +0200

    LAUNCHERS: abort if seteuid/setreuid failed to drop priviledges

 launchers/suidmain.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/launchers/suidmain.c b/launchers/suidmain.c
index 8a0d43d..c56f8c1 100644
--- a/launchers/suidmain.c
+++ b/launchers/suidmain.c
@@ -54,9 +54,17 @@ main (int    argc,
   if (euid != uid)
     {
 #if     HAVE_SETEUID
-      seteuid (uid);
+      if (seteuid (uid) < 0)
+        {
+          perror ("seteuid()");
+          _exit (127);
+        }
 #elif   HAVE_SETREUID
-      setreuid (-1, uid);
+      if (setreuid (-1, uid) < 0)
+        {
+          perror ("setreuid()");
+          _exit (127);
+        }
 #else
 #error platform misses facility to drop privileges
 #endif