combine-diff: optimize combine_diff_path sets intersection

diff --git a/shell.c b/shell.c
index 84b237fef352e2f94f853897dbb5f2364d50962d..5c0d47a5cc1ae85a03e40321e97ddfa859ff7e1a 100644 (file)
--- a/shell.c
+++ b/shell.c
@@ -6,6 +6,7 @@
 
 #define COMMAND_DIR "git-shell-commands"
 #define HELP_COMMAND COMMAND_DIR "/help"
+#define NOLOGIN_COMMAND COMMAND_DIR "/no-interactive-login"
 
 static int do_generic_cmd(const char *me, char *arg)
 {
@@ -14,7 +15,7 @@ static int do_generic_cmd(const char *me, char *arg)
        setup_path();
        if (!arg || !(arg = sq_dequote(arg)))
                die("bad argument");
-       if (prefixcmp(me, "git-"))
+       if (!starts_with(me, "git-"))
                die("bad command");
 
        my_argv[0] = me + 4;
@@ -65,6 +66,18 @@ static void run_shell(void)
 {
        int done = 0;
        static const char *help_argv[] = { HELP_COMMAND, NULL };
+
+       if (!access(NOLOGIN_COMMAND, F_OK)) {
+               /* Interactive login disabled. */
+               const char *argv[] = { NOLOGIN_COMMAND, NULL };
+               int status;
+
+               status = run_command_v_opt(argv, 0);
+               if (status < 0)
+                       exit(127);
+               exit(status);
+       }
+
        /* Print help if enabled */
        run_command_v_opt(help_argv, RUN_SILENT_EXEC_FAILURE);
 
@@ -134,7 +147,6 @@ int main(int argc, char **argv)
        char *prog;
        const char **user_argv;
        struct commands *cmd;
-       int devnull_fd;
        int count;
 
        git_setup_gettext();
@@ -143,15 +155,10 @@ int main(int argc, char **argv)
 
        /*
         * Always open file descriptors 0/1/2 to avoid clobbering files
-        * in die().  It also avoids not messing up when the pipes are
-        * dup'ed onto stdin/stdout/stderr in the child processes we spawn.
+        * in die().  It also avoids messing up when the pipes are dup'ed
+        * onto stdin/stdout/stderr in the child processes we spawn.
         */
-       devnull_fd = open("/dev/null", O_RDWR);
-       while (devnull_fd >= 0 && devnull_fd <= 2)
-               devnull_fd = dup(devnull_fd);
-       if (devnull_fd == -1)
-               die_errno("opening /dev/null failed");
-       close (devnull_fd);
+       sanitize_stdfds();
 
        /*
         * Special hack to pretend to be a CVS server