fix --join

1 files changed, 10 insertions, 2 deletions

diff --git a/src/firejail/util.c b/src/firejail/util.c
index 14e9f6440..3437d495f 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -37,7 +37,6 @@ static void clean_supplementary_groups(gid_t gid) {
         assert(cfg.username);
         gid_t groups[MAX_GROUPS];
         int ngroups = MAX_GROUPS;
-
         int rv = getgrouplist(cfg.username, gid, groups, &ngroups);
         if (rv == -1)
                 goto clean_all;
@@ -74,6 +73,13 @@ static void clean_supplementary_groups(gid_t gid) {
                 rv = setgroups(new_ngroups, new_groups);
                 if (rv)
                         goto clean_all;
+
+                if (arg_debug) {
+                        printf("Supplementary groups: ");
+                        for (i = 0; i < new_ngroups; i++)
+                                printf("%d ", new_groups[i]);
+                        printf("\n");
+                }
         }
         else
                 goto clean_all;
@@ -92,13 +98,15 @@ clean_all:
 void drop_privs(int nogroups) {
         EUID_ROOT();
         gid_t gid = getgid();
+        if (arg_debug)
+                printf("Drop privileges: pid %d, uid %d, gid %d, nogroups %d\n",  getpid(), getuid(), gid, nogroups);
 
         // configure supplementary groups
         if (gid == 0 || nogroups) {
                 if (setgroups(0, NULL) < 0)
                         errExit("setgroups");
                 if (arg_debug)
-                        printf("Username %s, no supplementary groups\n", cfg.username);
+                        printf("No supplementary groups\n");
         }
         else if (arg_noroot)
                 clean_supplementary_groups(gid);