Add a non-interactive mode to tinc commands.

Some tinc commands, such as "tinc generate-keys", use the terminal to
ask the user for information. This can be bypassed by making sure
there is no terminal, which is trivial on *nix but might require
jumping through some hoops on Windows depending on how the command is
invoked.

This commit adds a --batch option that ensures tinc will never ask the
user for input, even if it is attached to a terminal.

diff --git a/src/tincctl.c b/src/tincctl.c
index 799da0a..c0c8a25 100644 (file)
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -75,6 +75,7 @@ char *scriptextension = "";
 static char *prompt;
 
 static struct option const long_options[] = {
+       {"batch", no_argument, NULL, 'b'},
        {"config", required_argument, NULL, 'c'},
        {"net", required_argument, NULL, 'n'},
        {"help", no_argument, NULL, 1},
@@ -100,6 +101,7 @@ static void usage(bool status) {
        } else {
                printf("Usage: %s [options] command\n\n", program_name);
                printf("Valid options are:\n"
+                               "  -b, --batch             Don't ask for anything (non-interactive mode).\n"
                                "  -c, --config=DIR        Read configuration options from DIR.\n"
                                "  -n, --net=NETNAME       Connect to net NETNAME.\n"
                                "      --pidfile=FILENAME  Read control cookie from FILENAME.\n"
@@ -158,6 +160,10 @@ static bool parse_options(int argc, char **argv) {
                        case 0:   /* long option */
                                break;
 
+                       case 'b':
+                               tty = false;
+                               break;
+
                        case 'c': /* config file */
                                confbase = xstrdup(optarg);
                                confbasegiven = true;
@@ -2439,6 +2445,7 @@ int main(int argc, char *argv[]) {
        program_name = argv[0];
        orig_argv = argv;
        orig_argc = argc;
+       tty = isatty(0) && isatty(1);
 
        if(!parse_options(argc, argv))
                return 1;
@@ -2469,8 +2476,6 @@ int main(int argc, char *argv[]) {
        srand(time(NULL));
        crypto_init();
 
-       tty = isatty(0) && isatty(1);
-
        if(optind >= argc)
                return cmd_shell(argc, argv);