[libc] 优化system 支持gcc

Author: mysterywolf

components/finsh/msh.c

@@ -257,21 +257,6 @@ int msh_exec_module(const char *cmd_line, int size)
     rt_free(pg_name);
     return ret;
 }
-
-int system(const char *command)
-{
-    int ret = -RT_ENOMEM;
-    char *cmd = rt_strdup(command);
-
-    if (cmd)
-    {
-        ret = msh_exec(cmd, rt_strlen(cmd));
-        rt_free(cmd);
-    }
-
-    return ret;
-}
-RTM_EXPORT(system);
 #endif /* defined(RT_USING_MODULE) && defined(RT_USING_DFS) */
 
 static int _msh_exec_cmd(char *cmd, rt_size_t length, int *retp)

components/libc/compilers/armlibc/syscalls.c

@@ -319,16 +319,6 @@ int remove(const char *filename)
 #endif
 }
 
-#if defined(RT_USING_FINSH) && defined(RT_USING_MODULE) && defined(RT_USING_DFS)
-/* use system(const char *string) implementation in the msh */
-#else
-int system(const char *string)
-{
-    extern int __rt_libc_system(const char *string);
-    return __rt_libc_system(string);
-}
-#endif
-
 #ifdef __MICROLIB
 #include <stdio.h>
 

components/libc/compilers/common/stdlib.c

@@ -25,11 +25,21 @@ void __rt_libc_exit(int status)
     }
 }
 
-int __rt_libc_system(const char *string)
-{
 #ifdef RT_USING_MSH
+int system(const char *command)
+{
     extern int msh_exec(char *cmd, rt_size_t length);
-    msh_exec((char*)string, rt_strlen(string));
-#endif
-    return 0;
+
+    int ret = -RT_ENOMEM;
+    char *cmd = rt_strdup(command);
+
+    if (cmd)
+    {
+        ret = msh_exec(cmd, rt_strlen(cmd));
+        rt_free(cmd);
+    }
+
+    return ret;
 }
+RTM_EXPORT(system);
+#endif

components/libc/compilers/dlib/syscalls.c

@@ -6,7 +6,6 @@
  * Change Logs:
  * Date           Author       Notes
  * 2021-02-13     Meco Man     implement exit() and abort()
- * 2021-02-20     Meco Man     add system()
  */
 #include <rtthread.h>
 
@@ -17,9 +16,3 @@ void __exit (int status)
     __rt_libc_exit(status);
     while(1);
 }
-
-int system(const char * string)
-{
-    extern int __rt_libc_system(const char *string);
-    return __rt_libc_system(string);
-}

components/libc/compilers/gcc/newlib/syscalls.c

@@ -308,12 +308,6 @@ _ssize_t _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 #endif
 }
 
-void _system(const char *s)
-{
-    extern int __rt_libc_system(const char *string);
-    __rt_libc_system(s);
-}
-
 /* for exit() and abort() */
 __attribute__ ((noreturn)) void _exit (int status)
 {