Improve error reporting while mounting

Move error message after debug logging and add cause message.

Signed-off-by: Tomi Leppänen <tomi.leppanen@jolla.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/firejail/fs_etc.c b/src/firejail/fs_etc.c
index b9ed81db3..d093d5637 100644
--- a/src/firejail/fs_etc.c
+++ b/src/firejail/fs_etc.c
@@ -18,6 +18,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 #include "firejail.h"
+#include <errno.h>
 #include <sys/mount.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -147,7 +148,7 @@ void fs_private_dir_copy(const char *private_dir, const char *private_run_dir, c
         struct stat s;
         if (stat(private_dir, &s) == -1) {
                 if (arg_debug)
-                        printf("Cannot find %s\n", private_dir);
+                        printf("Cannot find %s: %s\n", private_dir, strerror(errno));
                 return;
         }
 
@@ -191,16 +192,17 @@ void fs_private_dir_mount(const char *private_dir, const char *private_run_dir)
         assert(private_dir);
         assert(private_run_dir);
 
+        if (arg_debug)
+                printf("Mount-bind %s on top of %s\n", private_run_dir, private_dir);
+
         // nothing to do if directory does not exist
         struct stat s;
         if (stat(private_dir, &s) == -1) {
                 if (arg_debug)
-                        printf("Cannot find %s\n", private_dir);
+                        printf("Cannot find %s: %s\n", private_dir, strerror(errno));
                 return;
         }
 
-        if (arg_debug)
-                printf("Mount-bind %s on top of %s\n", private_run_dir, private_dir);
         if (mount(private_run_dir, private_dir, NULL, MS_BIND|MS_REC, NULL) < 0)
                 errExit("mount bind");
         fs_logger2("mount", private_dir);