bugfix: 解决shell在exec的时候传递的argv不正确的bug (#437)

kernel/src/syscall/mod.rs

@@ -1175,15 +1175,14 @@ impl Syscall {
                 Self::get_rusage(who, rusage)
             }
 
-            SYS_READLINK =>{
+            SYS_READLINK => {
                 let path = args[0] as *const u8;
                 let buf = args[1] as *mut u8;
                 let bufsiz = args[2] as usize;
                 Self::readlink(path, buf, bufsiz)
-
             }
 
-            SYS_READLINK_AT =>{
+            SYS_READLINK_AT => {
                 let dirfd = args[0] as i32;
                 let pathname = args[1] as *const u8;
                 let buf = args[2] as *mut u8;

user/apps/shell/cmd.c

@@ -522,9 +522,9 @@ int shell_cmd_exec(int argc, char **argv)
         // printf("before execv, path=%s, argc=%d\n", file_path, argc);
 
         char **real_argv;
-        if (argc > 2)
+        if (argc > 1)
         {
-            real_argv = &argv[2];
+            real_argv = &argv[1];
         }
         execv(file_path, real_argv);
         // printf("after execv, path=%s, argc=%d\n", file_path, argc);