app_dahdiras: Use waitpid instead of wait4.

Several places in the code were using wait4 while other places were using
waitpid.  This change makes all places use waitpid in order to make things
more consistent and since the 'rusage' object passed in/out of wait4 was
never used.

(closes issue ASTERISK-22557)
Reported by: YvesGael
Patches:
     asterisk-11.5.1-wait4.patch uploaded by hurdman (license 6537)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@402546 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_dahdiras.c

@@ -150,7 +150,7 @@ static void run_ras(struct ast_channel *chan, char *args)
 		ast_log(LOG_WARNING, "Failed to spawn RAS\n");
 	} else {
 		for (;;) {
-			res = wait4(pid, &status, WNOHANG, NULL);
+			res = waitpid(pid, &status, WNOHANG);
 			if (!res) {
 				/* Check for hangup */
 				if (ast_check_hangup(chan) && !signalled) {
@@ -163,7 +163,7 @@ static void run_ras(struct ast_channel *chan, char *args)
 				continue;
 			}
 			if (res < 0) {
-				ast_log(LOG_WARNING, "wait4 returned %d: %s\n", res, strerror(errno));
+				ast_log(LOG_WARNING, "waitpid returned %d: %s\n", res, strerror(errno));
 			}
 			if (WIFEXITED(status)) {
 				ast_verb(3, "RAS on %s terminated with status %d\n", ast_channel_name(chan), WEXITSTATUS(status));

main/asterisk.c

@@ -1233,7 +1233,6 @@ int ast_safe_system(const char *s)
 {
 	pid_t pid;
 	int res;
-	struct rusage rusage;
 	int status;
 
 #if defined(HAVE_WORKING_FORK) || defined(HAVE_WORKING_VFORK)
@@ -1265,7 +1264,7 @@ int ast_safe_system(const char *s)
 		_exit(1);
 	} else if (pid > 0) {
 		for (;;) {
-			res = wait4(pid, &status, 0, &rusage);
+			res = waitpid(pid, &status, 0);
 			if (res > -1) {
 				res = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
 				break;
@@ -1751,7 +1750,7 @@ static void _child_handler(int sig)
 	/*
 	 * Reap all dead children -- not just one
 	 */
-	for (n = 0; wait4(-1, &status, WNOHANG, NULL) > 0; n++)
+	for (n = 0; waitpid(-1, &status, WNOHANG) > 0; n++)
 		;
 	if (n == 0 && option_debug)
 		printf("Huh?  Child handler, but nobody there?\n");

utils/extconf.c

@@ -1330,7 +1330,6 @@ int ast_safe_system(const char *s)
 	int x;
 #endif
 	int res;
-	struct rusage rusage;
 	int status;
 
 #if defined(HAVE_WORKING_FORK) || defined(HAVE_WORKING_VFORK)
@@ -1352,7 +1351,7 @@ int ast_safe_system(const char *s)
 		_exit(1);
 	} else if (pid > 0) {
 		for(;;) {
-			res = wait4(pid, &status, 0, &rusage);
+			res = waitpid(pid, &status, 0);
 			if (res > -1) {
 				res = WIFEXITED(status) ? WEXITSTATUS(status) : -1;
 				break;