t9001: style modernisation phase #4

diff --git a/credential-cache--daemon.c b/credential-cache--daemon.c
index 3b370ca5e529c74e17e0f39da5c689ebc4ccfc25..c2f00498f6a171ecde3dd91a5cbdb30d88827495 100644 (file)
--- a/credential-cache--daemon.c
+++ b/credential-cache--daemon.c
@@ -2,6 +2,7 @@
 #include "credential.h"
 #include "unix-socket.h"
 #include "sigchain.h"
+#include "parse-options.h"
 
 static const char *socket_path;
 
@@ -201,7 +202,7 @@ static int serve_cache_loop(int fd)
        return 1;
 }
 
-static void serve_cache(const char *socket_path)
+static void serve_cache(const char *socket_path, int debug)
 {
        int fd;
 
@@ -211,6 +212,10 @@ static void serve_cache(const char *socket_path)
 
        printf("ok\n");
        fclose(stdout);
+       if (!debug) {
+               if (!freopen("/dev/null", "w", stderr))
+                       die_errno("unable to point stderr to /dev/null");
+       }
 
        while (serve_cache_loop(fd))
                ; /* nothing */
@@ -252,16 +257,28 @@ static void check_socket_directory(const char *path)
 
 int main(int argc, const char **argv)
 {
-       socket_path = argv[1];
+       static const char *usage[] = {
+               "git-credential-cache--daemon [opts] <socket_path>",
+               NULL
+       };
+       int debug = 0;
+       const struct option options[] = {
+               OPT_BOOL(0, "debug", &debug,
+                        N_("print debugging messages to stderr")),
+               OPT_END()
+       };
+
+       argc = parse_options(argc, argv, NULL, options, usage, 0);
+       socket_path = argv[0];
 
        if (!socket_path)
-               die("usage: git-credential-cache--daemon <socket_path>");
+               usage_with_options(usage, options);
        check_socket_directory(socket_path);
 
        atexit(cleanup_socket);
        sigchain_push_common(cleanup_socket_on_signal);
 
-       serve_cache(socket_path);
+       serve_cache(socket_path, debug);
 
        return 0;
 }