Add bufgetpwuid. (Repeated calls to getpwuid() are really expensive.)
diff --git a/lib/lib.c b/lib/lib.c
index 0df45bf..98597b2 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -1074,3 +1074,31 @@
{
return (minor&0xff)|((major&0xfff)<<8)|((minor&0xfff00)<<12);
}
+
+// Return cached passwd entries.
+struct passwd *bufgetpwuid(uid_t uid)
+{
+ struct pwuidbuf_list {
+ struct pwuidbuf_list *next;
+ struct passwd pw;
+ } *list;
+ struct passwd *temp;
+ static struct pwuidbuf_list *pwuidbuf;
+
+ for (list = pwuidbuf; list; list = list->next)
+ if (list->pw.pw_uid == uid) return &(list->pw);
+
+ list = xmalloc(512);
+ list->next = pwuidbuf;
+
+ errno = getpwuid_r(uid, &list->pw, sizeof(*list)+(char *)list,
+ 512-sizeof(*list), &temp);
+ if (!temp) {
+ free(list);
+
+ return 0;
+ }
+ pwuidbuf = list;
+
+ return &list->pw;
+}
