fish: New command: 'supported'

This checks all available optional groups and prints out which
ones are supported by the daemon.  Note you must launch the appliance
first.

Example:

><fs> supported
      augeas yes
     inotify yes
 linuxfsuuid yes
linuxmodules yes
 linuxxattrs yes
        lvm2 yes
       mknod yes
      ntfs3g yes
   ntfsprogs yes
    realpath yes
       scrub yes
     selinux yes
          xz yes
    zerofree yes

1 files changed, 81 insertions, 0 deletions

diff --git a/fish/supported.c b/fish/supported.c
new file mode 100644
index 00000000..c97af143
--- /dev/null
+++ b/fish/supported.c
@@ -0,0 +1,81 @@
+/* guestfish - the filesystem interactive shell
+ * Copyright (C) 2010 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "fish.h"
+
+int
+do_supported (const char *cmd, int argc, char *argv[])
+{
+  char **groups;
+
+  /* As a side-effect this also checks that we've called 'launch'. */
+  groups = guestfs_available_all_groups (g);
+  if (groups == NULL)
+    return -1;
+
+  /* Temporarily replace the error handler so that messages don't get
+   * printed to stderr while we are issuing commands.
+   */
+  guestfs_error_handler_cb old_error_cb;
+  void *old_error_cb_data;
+  old_error_cb = guestfs_get_error_handler (g, &old_error_cb_data);
+  guestfs_set_error_handler (g, NULL, NULL);
+
+  /* Work out the max string length of any group name. */
+  size_t i;
+  size_t len = 0;
+  for (i = 0; groups[i] != NULL; ++i) {
+    size_t l = strlen (groups[i]);
+    if (l > len)
+      len = l;
+  }
+
+  for (i = 0; groups[i] != NULL; ++i) {
+    size_t l = strlen (groups[i]);
+    size_t j;
+    for (j = 0; j < len-l; ++j)
+      putchar (' ');
+    printf ("%s", groups[i]);
+    putchar (' ');
+
+    char *gg[] = { groups[i], NULL };
+    int r = guestfs_available (g, gg);
+    if (r == 0)
+      printf ("%s", _("yes"));
+    else
+      printf ("%s", _("no"));
+    putchar ('\n');
+  }
+
+  /* Free groups list. */
+  for (i = 0; groups[i] != NULL; ++i)
+    free (groups[i]);
+  free (groups);
+
+  /* Restore error handler. */
+  guestfs_set_error_handler (g, old_error_cb, old_error_cb_data);
+
+  return 0;
+}