[glib/wip/oholy/gio-info-prevent-criticals] gio-tool-info: Prevent criticals if mount options are not available

[Ondrej Holy <oholy src gnome org>]

commit 363ea679e58b98fb98829a20c5d0fb6ed50a0296
Author: Ondrej Holy <oholy redhat com>
Date:   Thu Dec 10 13:22:45 2020 +0100

    gio-tool-info: Prevent criticals if mount options are not available
    
    NULL is valid return value for the g_unix_mount_get_options function
    because mount options are currently provided only by libmount implementation.
    However, the gio tool passes the returned value to the g_strescape function
    without checking, which produces the following critical warning:
    GLib-CRITICAL **: 13:47:15.294: g_strescape: assertion 'source != NULL' failed
    
    Let's add the missing check to prevent the critical warnings.

 gio/gio-tool-info.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/gio/gio-tool-info.c b/gio/gio-tool-info.c
index 7cf568370..a06263545 100644
--- a/gio/gio-tool-info.c
+++ b/gio/gio-tool-info.c
@@ -182,7 +182,8 @@ show_info (GFile *file, GFileInfo *info)
           gchar *root_string = NULL;
           gchar *mount;
           gchar *fs;
-          gchar *options;
+          const gchar *options;
+          gchar *options_string = NULL;
 
           device = g_strescape (g_unix_mount_get_device_path (entry), NULL);
           root = g_unix_mount_get_root_path (entry);
@@ -194,16 +195,22 @@ show_info (GFile *file, GFileInfo *info)
             }
           mount = g_strescape (g_unix_mount_get_mount_path (entry), NULL);
           fs = g_strescape (g_unix_mount_get_fs_type (entry), NULL);
-          options = g_strescape (g_unix_mount_get_options (entry), NULL);
+
+          options = g_unix_mount_get_options (entry);
+          if (options != NULL)
+            {
+              options_string = g_strescape (options, NULL);
+            }
 
           g_print (_("unix mount: %s%s %s %s %s\n"), device,
-                   root_string ? root_string : "", mount, fs, options);
+                   root_string ? root_string : "", mount, fs,
+                   options_string ? options_string : "");
 
           g_free (device);
           g_free (root_string);
           g_free (mount);
           g_free (fs);
-          g_free (options);
+          g_free (options_string);
 
           g_unix_mount_free (entry);
         }