make constants from maxfd values (#1300)

its good practice to use constants instead of (random) values.

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

1 files changed, 6 insertions, 4 deletions

diff --git a/lib/utils_cmd.c b/lib/utils_cmd.c
index e41a9821..7eb9a3a0 100644
--- a/lib/utils_cmd.c
+++ b/lib/utils_cmd.c
@@ -79,12 +79,14 @@ static pid_t *_cmd_pids = NULL;
  * If that fails and the macro isn't defined, we fall back to an educated
  * guess. There's no guarantee that our guess is adequate and the program
  * will die with SIGSEGV if it isn't and the upper boundary is breached. */
+#define DEFAULT_MAXFD  256   /* fallback value if no max open files value is set */
+#define MAXFD_LIMIT   8192   /* upper limit of open files */
 #ifdef _SC_OPEN_MAX
 static long maxfd = 0;
 #elif defined(OPEN_MAX)
 # define maxfd OPEN_MAX
 #else   /* sysconf macro unavailable, so guess (may be wildly inaccurate) */
-# define maxfd 256
+# define maxfd DEFAULT_MAXFD
 #endif
 
 
@@ -112,7 +114,7 @@ cmd_init (void)
         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;
+                maxfd = DEFAULT_MAXFD;
         }
 #endif
 
@@ -120,8 +122,8 @@ cmd_init (void)
          * ( e.g. on SunOS, when ulimit is set to unlimited: 2147483647 this would cause
          * a segfault when following calloc is called ...  ) */
 
-        if ( maxfd > 2048 ) {
-                maxfd = 2048;
+        if ( maxfd > MAXFD_LIMIT ) {
+                maxfd = MAXFD_LIMIT;
         }
 
         if (!_cmd_pids)