libbb: simplify parameter passing in is_in_supplementary_groups()

function                                             old     new   delta
is_in_supplementary_groups                            54      52      -2
nexpr                                                721     718      -3
test_exec                                            125     119      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-11)             Total: -11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/libbb/bb_getgroups.c b/libbb/bb_getgroups.c
index f030d5eac..d9bbe95c3 100644
--- a/libbb/bb_getgroups.c
+++ b/libbb/bb_getgroups.c
@@ -47,16 +47,16 @@ gid_t* FAST_FUNC bb_getgroups(int *ngroups, gid_t *group_array)
 }
 
 /* Return non-zero if GID is in our supplementary group list. */
-int FAST_FUNC is_in_supplementary_groups(int *pngroups, gid_t **pgroup_array, gid_t gid)
+int FAST_FUNC is_in_supplementary_groups(struct cached_groupinfo *groupinfo, gid_t gid)
 {
         int i;
         int ngroups;
         gid_t *group_array;
 
-        if (*pngroups == 0)
-                *pgroup_array = bb_getgroups(pngroups, NULL);
-        ngroups = *pngroups;
-        group_array = *pgroup_array;
+        if (groupinfo->ngroups == 0)
+                groupinfo->supplementary_array = bb_getgroups(&groupinfo->ngroups, NULL);
+        ngroups = groupinfo->ngroups;
+        group_array = groupinfo->supplementary_array;
 
         /* Search through the list looking for GID. */
         for (i = 0; i < ngroups; i++)