run_hook(): check the executability of the hook before filling argv

[thirdparty/git.git] / run-command.c

diff --git a/run-command.c b/run-command.c
index c90cdc50e3165bcdb798c85b2dc7b929a9b0a144..fc54c07a932dbefe39ea98e4cfbb4a15d158b70d 100644 (file)
--- a/run-command.c
+++ b/run-command.c
@@ -342,3 +342,48 @@ int finish_async(struct async *async)
 #endif
        return ret;
 }
+
+int run_hook(const char *index_file, const char *name, ...)
+{
+       struct child_process hook;
+       const char *argv[10], *env[2];
+       char index[PATH_MAX];
+       va_list args;
+       int ret;
+       int i;
+
+       if (access(git_path("hooks/%s", name), X_OK) < 0)
+               return 0;
+
+       va_start(args, name);
+       argv[0] = git_path("hooks/%s", name);
+       i = 0;
+       do {
+               if (++i >= ARRAY_SIZE(argv))
+                       die("run_hook(): too many arguments");
+               argv[i] = va_arg(args, const char *);
+       } while (argv[i]);
+       va_end(args);
+
+       memset(&hook, 0, sizeof(hook));
+       hook.argv = argv;
+       hook.no_stdin = 1;
+       hook.stdout_to_stderr = 1;
+       if (index_file) {
+               snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file);
+               env[0] = index;
+               env[1] = NULL;
+               hook.env = env;
+       }
+
+       ret = start_command(&hook);
+       if (ret) {
+               warning("Could not spawn %s", argv[0]);
+               return ret;
+       }
+       ret = finish_command(&hook);
+       if (ret == -ERR_RUN_COMMAND_WAITPID_SIGNAL)
+               warning("%s exited due to uncaught signal", argv[0]);
+
+       return ret;
+}