fix maxfd being zero

If _SC_OPEN_MAX is available then maxfd was zero initialized and never set to the value from sysconf.
This leads to segfaults with free(): invalid size introduced by commit 7cafb0e84550035fe671662c293122be975065ca.

Signed-off-by: Sven Nierlein <sven@nierlein.de>

1 files changed, 2 insertions, 8 deletions

diff --git a/plugins/runcmd.c b/plugins/runcmd.c
index c3828678..a7155d27 100644
--- a/plugins/runcmd.c
+++ b/plugins/runcmd.c
@@ -86,14 +86,8 @@ extern void die (int, const char *, ...)
  * through this api and thus achieve async-safeness throughout the api */
 void np_runcmd_init(void)
 {
-#ifndef maxfd
-        if(!maxfd && (maxfd = sysconf(_SC_OPEN_MAX)) < 0) {
-                /* possibly log or emit a warning here, since there's no
-                 * guarantee that our guess at maxfd will be adequate */
-                maxfd = 256;
-        }
-#endif
-
+        if(maxfd == 0)
+                maxfd = open_max();
         if(!np_pids) np_pids = calloc(maxfd, sizeof(pid_t));
 }