c35e4870f2
that we try to link in objects from libc.a where we also provide our own replacements here, leading to multiple definitions during linking. OK'ed by christos@
290 lines
6.6 KiB
C
290 lines
6.6 KiB
C
/* $NetBSD: getpwent.c,v 1.11 2009/01/16 14:48:04 he Exp $ */
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/*
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* Copyright (c) 1987, 1988, 1989, 1993, 1994, 1995
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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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/*
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* Copied from: lib/libc/gen/getpwent.c
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* NetBSD: getpwent.c,v 1.48 2000/10/03 03:22:26 enami Exp
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* and then gutted, leaving only /etc/master.passwd support.
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*/
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#include <sys/cdefs.h>
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#ifdef __weak_alias
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#define endpwent _endpwent
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#define getpwent _getpwent
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#define getpwent_r _getpwent_r
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#define getpwuid _getpwuid
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#define getpwnam _getpwnam
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#define setpwent _setpwent
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#define setpassent _setpassent
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#define getpwuid_r _getpwuid_r
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#define getpwnam_r _getpwnam_r
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__weak_alias(endpwent,_endpwent)
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__weak_alias(getpwent,_getpwent)
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__weak_alias(getpwent_r,_getpwent_r)
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__weak_alias(getpwuid,_getpwuid)
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__weak_alias(getpwnam,_getpwnam)
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__weak_alias(setpwent,_setpwent)
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__weak_alias(setpassent,_setpassent)
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__weak_alias(getpwuid_r,_getpwuid_r)
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__weak_alias(getpwnam_r,_getpwnam_r)
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__weak_alias(__getpwent50,_getpwent)
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__weak_alias(__getpwent_r50,_getpwent_r)
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__weak_alias(__getpwuid50,_getpwuid)
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__weak_alias(__getpwnam50,_getpwnam)
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__weak_alias(__getpwuid_r50,_getpwuid_r)
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__weak_alias(__getpwnam_r50,_getpwnam_r)
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#endif
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#include <sys/param.h>
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#include <limits.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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static int pwstart(void);
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static int pwscan(int, uid_t, const char *, struct passwd *,
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char *, size_t);
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static int pwmatchline(int, uid_t, const char *, struct passwd *,
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char *);
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static FILE *_pw_fp;
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static struct passwd _pw_passwd; /* password structure */
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static int _pw_stayopen; /* keep fd's open */
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static int _pw_filesdone;
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#define MAXLINELENGTH 1024
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static char pwline[MAXLINELENGTH];
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struct passwd *
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getpwent(void)
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{
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if ((!_pw_fp && !pwstart()) ||
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!pwscan(0, 0, NULL, &_pw_passwd, pwline, sizeof(pwline)))
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return (NULL);
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return (&_pw_passwd);
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}
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int
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getpwent_r(struct passwd *pwres, char *buf, size_t bufsiz,
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struct passwd **pwd)
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{
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int rval;
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if (!_pw_fp && !pwstart())
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return 1;
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rval = !pwscan(0, 0, NULL, pwres, buf, bufsiz);
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if (rval)
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*pwd = NULL;
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else
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*pwd = pwres;
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return rval;
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}
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struct passwd *
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getpwnam(const char *name)
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{
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struct passwd *pwd;
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return getpwnam_r(name, &_pw_passwd, pwline, sizeof(pwline),
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&pwd) == 0 ? pwd : NULL;
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}
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int
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getpwnam_r(const char *name, struct passwd *pwres, char *buf, size_t bufsiz,
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struct passwd **pwd)
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{
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int rval;
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if (!pwstart())
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return 1;
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rval = !pwscan(1, 0, name, pwres, buf, bufsiz);
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if (!_pw_stayopen)
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endpwent();
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if (rval)
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*pwd = NULL;
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else
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*pwd = pwres;
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return rval;
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}
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struct passwd *
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getpwuid(uid_t uid)
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{
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struct passwd *pwd;
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return getpwuid_r(uid, &_pw_passwd, pwline, sizeof(pwline),
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&pwd) == 0 ? pwd : NULL;
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}
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int
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getpwuid_r(uid_t uid, struct passwd *pwres, char *buf, size_t bufsiz,
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struct passwd **pwd)
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{
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int rval;
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if (!pwstart())
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return 1;
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rval = !pwscan(1, uid, NULL, pwres, buf, bufsiz);
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if (!_pw_stayopen)
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endpwent();
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if (rval)
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*pwd = NULL;
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else
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*pwd = pwres;
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return rval;
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}
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void
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setpwent(void)
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{
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(void) setpassent(0);
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}
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int
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setpassent(int stayopen)
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{
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if (!pwstart())
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return 0;
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_pw_stayopen = stayopen;
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return 1;
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}
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void
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endpwent(void)
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{
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_pw_filesdone = 0;
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if (_pw_fp) {
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(void)fclose(_pw_fp);
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_pw_fp = NULL;
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}
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}
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static int
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pwstart(void)
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{
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_pw_filesdone = 0;
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if (_pw_fp) {
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rewind(_pw_fp);
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return 1;
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}
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return (_pw_fp = fopen(_PATH_MASTERPASSWD, "r")) ? 1 : 0;
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}
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static int
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pwscan(int search, uid_t uid, const char *name, struct passwd *pwd, char *buf,
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size_t bufsiz)
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{
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if (_pw_filesdone)
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return 0;
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for (;;) {
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if (!fgets(buf, bufsiz, _pw_fp)) {
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if (!search)
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_pw_filesdone = 1;
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return 0;
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}
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/* skip lines that are too big */
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if (!strchr(buf, '\n')) {
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int ch;
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while ((ch = getc(_pw_fp)) != '\n' && ch != EOF)
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;
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continue;
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}
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if (pwmatchline(search, uid, name, pwd, buf))
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return 1;
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}
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/* NOTREACHED */
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}
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static int
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pwmatchline(int search, uid_t uid, const char *name, struct passwd *pwd,
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char *buf)
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{
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unsigned long id;
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char *cp, *bp, *ep;
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/* name may be NULL if search is nonzero */
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bp = buf;
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memset(pwd, 0, sizeof(*pwd));
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pwd->pw_name = strsep(&bp, ":\n"); /* name */
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if (search && name && strcmp(pwd->pw_name, name))
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return 0;
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pwd->pw_passwd = strsep(&bp, ":\n"); /* passwd */
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if (!(cp = strsep(&bp, ":\n"))) /* uid */
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return 0;
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id = strtoul(cp, &ep, 10);
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if (id > UID_MAX || *ep != '\0')
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return 0;
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pwd->pw_uid = (uid_t)id;
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if (search && name == NULL && pwd->pw_uid != uid)
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return 0;
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if (!(cp = strsep(&bp, ":\n"))) /* gid */
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return 0;
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id = strtoul(cp, &ep, 10);
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if (id > GID_MAX || *ep != '\0')
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return 0;
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pwd->pw_gid = (gid_t)id;
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if (!(pwd->pw_class = strsep(&bp, ":"))) /* class */
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return 0;
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if (!(ep = strsep(&bp, ":"))) /* change */
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return 0;
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if (!(ep = strsep(&bp, ":"))) /* expire */
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return 0;
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if (!(pwd->pw_gecos = strsep(&bp, ":\n"))) /* gecos */
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return 0;
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if (!(pwd->pw_dir = strsep(&bp, ":\n"))) /* directory */
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return 0;
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if (!(pwd->pw_shell = strsep(&bp, ":\n"))) /* shell */
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return 0;
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if (strchr(bp, ':') != NULL)
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return 0;
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return 1;
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}
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