From eb922ab3b0cd126478c934273f6d109b32e9b374 Mon Sep 17 00:00:00 2001
From: Ali Gholami Rudi <ali@rudi.ir>
Date: Thu, 25 Jul 2013 17:53:29 +0430
Subject: [PATCH] stdlib: add system()

---
 stdlib.c | 19 +++++++++++++++++++
 stdlib.h |  1 +
 2 files changed, 20 insertions(+)

diff --git a/stdlib.c b/stdlib.c
index 535c415..1413bd4 100644
--- a/stdlib.c
+++ b/stdlib.c
@@ -1,5 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 
 char **environ;
 
@@ -27,3 +29,20 @@ char *getenv(char *name)
 			return *p + len + 1;
 	return NULL;
 }
+
+int system(char *cmd)
+{
+	char *argv[] = {"/bin/sh", "-c", cmd, NULL};
+	pid_t pid;
+	int ret;
+	pid = fork();
+	if (pid < 0)
+		return -1;
+	if (!pid) {
+		execv(argv[0], argv);
+		exit(1);
+	}
+	if (waitpid(pid, &ret, 0) != pid)
+		return -1;
+	return ret;
+}
diff --git a/stdlib.h b/stdlib.h
index 7ec8d5c..cb88d05 100644
--- a/stdlib.h
+++ b/stdlib.h
@@ -15,6 +15,7 @@ void abort(void);
 char *getenv(char *name);
 void qsort(void *a, int n, int sz, int (*cmp)(void *, void *));
 int mkstemp(char *t);
+int system(char *cmd);
 
 void srand(unsigned int seed);
 int rand(void);
-- 
2.11.4.GIT