mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-27 17:58:13 +00:00
115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
/* $OpenBSD: pwcache.c,v 1.9 2005/08/08 08:05:34 espie Exp $ */
|
|
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/* OPENBSD ORIGINAL: lib/libc/gen/pwcache.c */
|
|
|
|
#include "includes.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define NCACHE 64 /* power of 2 */
|
|
#define MASK (NCACHE - 1) /* bits to store with */
|
|
|
|
#ifndef HAVE_USER_FROM_UID
|
|
char *
|
|
user_from_uid(uid_t uid, int nouser)
|
|
{
|
|
static struct ncache {
|
|
uid_t uid;
|
|
char *name;
|
|
} c_uid[NCACHE];
|
|
static int pwopen;
|
|
static char nbuf[15]; /* 32 bits == 10 digits */
|
|
struct passwd *pw;
|
|
struct ncache *cp;
|
|
|
|
cp = c_uid + (uid & MASK);
|
|
if (cp->uid != uid || cp->name == NULL) {
|
|
if (pwopen == 0) {
|
|
#ifdef HAVE_SETPASSENT
|
|
setpassent(1);
|
|
#endif
|
|
pwopen = 1;
|
|
}
|
|
if ((pw = getpwuid(uid)) == NULL) {
|
|
if (nouser)
|
|
return (NULL);
|
|
(void)snprintf(nbuf, sizeof(nbuf), "%u", uid);
|
|
}
|
|
cp->uid = uid;
|
|
if (cp->name != NULL)
|
|
free(cp->name);
|
|
cp->name = strdup(pw ? pw->pw_name : nbuf);
|
|
}
|
|
return (cp->name);
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_GROUP_FROM_GID
|
|
char *
|
|
group_from_gid(gid_t gid, int nogroup)
|
|
{
|
|
static struct ncache {
|
|
gid_t gid;
|
|
char *name;
|
|
} c_gid[NCACHE];
|
|
static int gropen;
|
|
static char nbuf[15]; /* 32 bits == 10 digits */
|
|
struct group *gr;
|
|
struct ncache *cp;
|
|
|
|
cp = c_gid + (gid & MASK);
|
|
if (cp->gid != gid || cp->name == NULL) {
|
|
if (gropen == 0) {
|
|
#ifdef HAVE_SETGROUPENT
|
|
setgroupent(1);
|
|
#endif
|
|
gropen = 1;
|
|
}
|
|
if ((gr = getgrgid(gid)) == NULL) {
|
|
if (nogroup)
|
|
return (NULL);
|
|
(void)snprintf(nbuf, sizeof(nbuf), "%u", gid);
|
|
}
|
|
cp->gid = gid;
|
|
if (cp->name != NULL)
|
|
free(cp->name);
|
|
cp->name = strdup(gr ? gr->gr_name : nbuf);
|
|
}
|
|
return (cp->name);
|
|
}
|
|
#endif
|