diff options
Diffstat (limited to 'src/basic/user-util.c')
| -rw-r--r-- | src/basic/user-util.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/basic/user-util.c b/src/basic/user-util.c index 3b253bc264..957285c091 100644 --- a/src/basic/user-util.c +++ b/src/basic/user-util.c @@ -410,9 +410,8 @@ char* gid_to_name(gid_t gid) { } int in_gid(gid_t gid) { - long ngroups_max; gid_t *gids; - int r, i; + int ngroups, r, i; if (getgid() == gid) return 1; @@ -423,12 +422,15 @@ int in_gid(gid_t gid) { if (!gid_is_valid(gid)) return -EINVAL; - ngroups_max = sysconf(_SC_NGROUPS_MAX); - assert(ngroups_max > 0); + ngroups = getgroups(0, NULL); + if (ngroups < 0) + return -errno; + if (ngroups == 0) + return 0; - gids = newa(gid_t, ngroups_max); + gids = newa(gid_t, ngroups); - r = getgroups(ngroups_max, gids); + r = getgroups(ngroups, gids); if (r < 0) return -errno; |