diff options
| -rw-r--r-- | lib/utils_cmd.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/utils_cmd.c b/lib/utils_cmd.c index 9e214bd4..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 @@ -112,10 +114,18 @@ 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 + /* if maxfd is unnaturally high, we force it to a lower value + * ( e.g. on SunOS, when ulimit is set to unlimited: 2147483647 this would cause + * a segfault when following calloc is called ... ) */ + + if ( maxfd > MAXFD_LIMIT ) { + maxfd = MAXFD_LIMIT; + } + if (!_cmd_pids) _cmd_pids = calloc (maxfd, sizeof (pid_t)); } |