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