gpgconf: Enhance --list-dirs.

* tools/gpgconf.c (main) <aListDir>: Factor code out to ...
(list_dirs): new.  Rewrite to use a table.  Allow selection of a
items.  Add "agent-ssh-socket".
--

This change makes the use of gpgconf in scripts easier.  For example,
to set the envvar with the name of the socket used by ssh, it is now
possible to do this:

  SSH_AUTH_SOCK="$(gpgconf --list-dirs agent-ssh-socket)"

which guarantees that the right name is used.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 59 insertions, 37 deletions

diff --git a/tools/gpgconf.c b/tools/gpgconf.c
index 2b177e233..ad61511d3 100644
--- a/tools/gpgconf.c
+++ b/tools/gpgconf.c
@@ -147,6 +147,64 @@ get_outfp (estream_t *fp)
 }
 
 
+static void
+list_dirs (estream_t fp, char **names)
+{
+  static struct {
+    const char *name;
+    const char *(*fnc)(void);
+    const char *extra;
+    int special;
+  } list[] = {
+    { "sysconfdir",         gnupg_sysconfdir, NULL },
+    { "bindir",             gnupg_bindir,     NULL },
+    { "libexecdir",         gnupg_libexecdir, NULL },
+    { "libdir",             gnupg_libdir,     NULL },
+    { "datadir",            gnupg_datadir,    NULL },
+    { "localedir",          gnupg_localedir,  NULL },
+    { "dirmngr-socket",     dirmngr_user_socket_name, NULL, 1 },
+    { "dirmngr-socket",     dirmngr_sys_socket_name,  NULL, 2 },
+    { "dirmngr-sys-socket", dirmngr_sys_socket_name,  NULL, 1 },
+    { "agent-ssh-socket",   gnupg_socketdir,  GPG_AGENT_SSH_SOCK_NAME },
+    { "agent-socket",       gnupg_socketdir,  GPG_AGENT_SOCK_NAME },
+    { "homedir",            gnupg_homedir,    NULL }
+  };
+  int idx, j;
+  char *tmp;
+  const char *s;
+
+
+  for (idx = 0; idx < DIM (list); idx++)
+    {
+      if (list[idx].special == 1 && dirmngr_user_socket_name ())
+        ;
+      else if (list[idx].special == 2 && !dirmngr_user_socket_name ())
+        ;
+      else if (list[idx].special == 1 || list[idx].special == 2)
+        continue;
+
+      s = list[idx].fnc ();
+      if (list[idx].extra)
+        {
+          tmp = make_filename (s, list[idx].extra, NULL);
+          s = tmp;
+        }
+      else
+        tmp = NULL;
+      if (!names)
+        es_fprintf (fp, "%s:%s\n", list[idx].name, gc_percent_escape (s));
+      else
+        {
+          for (j=0; names[j]; j++)
+            if (!strcmp (names[j], list[idx].name))
+              es_fprintf (fp, "%s\n", s);
+        }
+
+      xfree (tmp);
+    }
+}
+
+
 /* gpgconf main. */
 int
 main (int argc, char **argv)
@@ -357,43 +415,7 @@ main (int argc, char **argv)
     case aListDirs:
       /* Show the system configuration directories for gpgconf.  */
       get_outfp (&outfp);
-      es_fprintf (outfp, "sysconfdir:%s\n",
-                  gc_percent_escape (gnupg_sysconfdir ()));
-      es_fprintf (outfp, "bindir:%s\n",
-                  gc_percent_escape (gnupg_bindir ()));
-      es_fprintf (outfp, "libexecdir:%s\n",
-                  gc_percent_escape (gnupg_libexecdir ()));
-      es_fprintf (outfp, "libdir:%s\n",
-                  gc_percent_escape (gnupg_libdir ()));
-      es_fprintf (outfp, "datadir:%s\n",
-                  gc_percent_escape (gnupg_datadir ()));
-      es_fprintf (outfp, "localedir:%s\n",
-                  gc_percent_escape (gnupg_localedir ()));
-
-      if (dirmngr_user_socket_name ())
-        {
-          es_fprintf (outfp, "dirmngr-socket:%s\n",
-                      gc_percent_escape (dirmngr_user_socket_name ()));
-          es_fprintf (outfp, "dirmngr-sys-socket:%s\n",
-                      gc_percent_escape (dirmngr_sys_socket_name ()));
-        }
-      else
-        {
-          es_fprintf (outfp, "dirmngr-socket:%s\n",
-                      gc_percent_escape (dirmngr_sys_socket_name ()));
-        }
-
-      {
-        char *tmp = make_filename (gnupg_socketdir (),
-                                   GPG_AGENT_SOCK_NAME, NULL);
-        es_fprintf (outfp, "agent-socket:%s\n", gc_percent_escape (tmp));
-        xfree (tmp);
-      }
-      {
-        char *tmp = xstrdup (gnupg_homedir ());
-        es_fprintf (outfp, "homedir:%s\n", gc_percent_escape (tmp));
-        xfree (tmp);
-      }
+      list_dirs (outfp, argc? argv : NULL);
       break;
 
     case aCreateSocketDir: