Add a --list-modules command

Closes ticket 30452.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/app/config/config.c b/src/app/config/config.c
index 2a504d3065..7ccd76e7f0 100644
--- a/src/app/config/config.c
+++ b/src/app/config/config.c
@@ -2474,6 +2474,7 @@ static const struct {
   { "--quiet",                TAKES_NO_ARGUMENT },
   { "--hush",                 TAKES_NO_ARGUMENT },
   { "--version",              TAKES_NO_ARGUMENT },
+  { "--list-modules",         TAKES_NO_ARGUMENT },
   { "--library-versions",     TAKES_NO_ARGUMENT },
   { "-h",                     TAKES_NO_ARGUMENT },
   { "--help",                 TAKES_NO_ARGUMENT },
@@ -2695,6 +2696,13 @@ list_deprecated_options(void)
   }
 }
 
+/** Print all compile-time modules and their enabled/disabled status. */
+static void
+list_enabled_modules(void)
+{
+  printf("%s: %s\n", "dirauth", have_module_dirauth() ? "yes" : "no");
+}
+
 /** Last value actually set by resolve_my_address. */
 static uint32_t last_resolved_addr = 0;
 
@@ -5198,6 +5206,11 @@ options_init_from_torrc(int argc, char **argv)
     return 1;
   }
 
+  if (config_line_find(cmdline_only_options, "--list-modules")) {
+    list_enabled_modules();
+    return 1;
+  }
+
   if (config_line_find(cmdline_only_options, "--library-versions")) {
     printf("Tor version %s. \n", get_version());
     printf("Library versions\tCompiled\t\tRuntime\n");