libbb: password/group function helpers rewritten by Tito:

function                                             old     new   delta
xgetpwuid                                              -      27     +27
uid2uname_utoa                                         -      22     +22
gid2group_utoa                                         -      22     +22
uid2uname                                              -      18     +18
gid2group                                              -      18     +18
buffer_fill_and_print                                179     196     +17
print_user                                            12      24     +12
print_group                                           12      24     +12
get_cached                                            89      99     +10
...
print_common                                         134     120     -14
vlock_main                                           415     396     -19
logger_main                                          410     387     -23
crontab_main                                         642     609     -33
bb_getpwuid                                           42       -     -42
bb_getgrgid                                           42       -     -42
bb_getug                                              80       -     -80
------------------------------------------------------------------------------
(add/remove: 6/3 grow/shrink: 9/11 up/down: 187/-296)        Total: -109 bytes

1 files changed, 6 insertions, 6 deletions

diff --git a/libbb/procps.c b/libbb/procps.c
index 4d9a95b4f..c5e40bf88 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -13,7 +13,7 @@
 
 
 typedef struct unsigned_to_name_map_t {
-	unsigned id;
+	long id;
 	char name[USERNAME_MAX_SIZE];
 } unsigned_to_name_map_t;
 
@@ -52,8 +52,8 @@ static int get_cached(cache_t *cp, unsigned id)
 }
 #endif
 
-typedef char* FAST_FUNC ug_func(char *name, int bufsize, long uid);
-static char* get_cached(cache_t *cp, unsigned id, ug_func* fp)
+static char* get_cached(cache_t *cp, long id,
+			char* FAST_FUNC x2x_utoa(long id))
 {
 	int i;
 	for (i = 0; i < cp->size; i++)
@@ -63,16 +63,16 @@ static char* get_cached(cache_t *cp, unsigned id, ug_func* fp)
 	cp->cache = xrealloc_vector(cp->cache, 2, i);
 	cp->cache[i].id = id;
 	/* Never fails. Generates numeric string if name isn't found */
-	fp(cp->cache[i].name, sizeof(cp->cache[i].name), id);
+	safe_strncpy(cp->cache[i].name, x2x_utoa(id), sizeof(cp->cache[i].name));
 	return cp->cache[i].name;
 }
 const char* FAST_FUNC get_cached_username(uid_t uid)
 {
-	return get_cached(&username, uid, bb_getpwuid);
+	return get_cached(&username, uid, uid2uname_utoa);
 }
 const char* FAST_FUNC get_cached_groupname(gid_t gid)
 {
-	return get_cached(&groupname, gid, bb_getgrgid);
+	return get_cached(&groupname, gid, gid2group_utoa);
 }