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-rw-r--r--lib/lib.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/lib.c b/lib/lib.c
index 98597b24..66814a45 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1102,3 +1102,31 @@ struct passwd *bufgetpwuid(uid_t uid)
return &list->pw;
}
+
+// Return cached passwd entries.
+struct group *bufgetgrgid(gid_t gid)
+{
+ struct grgidbuf_list {
+ struct grgidbuf_list *next;
+ struct group gr;
+ } *list;
+ struct group *temp;
+ static struct grgidbuf_list *grgidbuf;
+
+ for (list = grgidbuf; list; list = list->next)
+ if (list->gr.gr_gid == gid) return &(list->gr);
+
+ list = xmalloc(512);
+ list->next = grgidbuf;
+
+ errno = getgrgid_r(gid, &list->gr, sizeof(*list)+(char *)list,
+ 512-sizeof(*list), &temp);
+ if (!temp) {
+ free(list);
+
+ return 0;
+ }
+ grgidbuf = list;
+
+ return &list->gr;
+}