170 lines
4.7 KiB
C
170 lines
4.7 KiB
C
/* $NetBSD: pw_scan.c,v 1.11 2002/01/29 10:20:30 tv Exp $ */
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/*
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* Copyright (c) 1987, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#if HAVE_CONFIG_H
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#include "config.h"
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#include "compat_pwd.h"
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#else
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: pw_scan.c,v 1.11 2002/01/29 10:20:30 tv Exp $");
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#endif /* LIBC_SCCS and not lint */
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#if defined(_LIBC)
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#include "namespace.h"
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#endif
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#include <sys/types.h>
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#include <assert.h>
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#include <err.h>
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#include <limits.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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#include <unistd.h>
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#ifdef _LIBC
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#include "pw_private.h"
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#endif
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#endif /* !HAVE_CONFIG_H */
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int
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#ifdef _LIBC
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__pw_scan(bp, pw, flags)
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#else
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pw_scan(bp, pw, flags)
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#endif
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char *bp;
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struct passwd *pw;
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int *flags;
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{
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unsigned long id;
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int root, inflags;
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char *ep;
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const char *p, *sh;
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_DIAGASSERT(bp != NULL);
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_DIAGASSERT(pw != NULL);
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inflags = 0;
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if (flags != (int *)NULL) {
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inflags = *flags;
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*flags = 0;
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}
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if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
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goto fmt;
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root = !strcmp(pw->pw_name, "root");
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if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
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goto fmt;
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if (!(p = strsep(&bp, ":"))) /* uid */
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goto fmt;
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id = strtoul(p, &ep, 10);
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if (root && id) {
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if (!(inflags & _PASSWORD_NOWARN))
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warnx("root uid should be 0");
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return (0);
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}
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if (id > UID_MAX || *ep != '\0') {
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if (!(inflags & _PASSWORD_NOWARN))
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warnx("invalid uid '%s'", p);
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return (0);
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}
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pw->pw_uid = (uid_t)id;
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if ((*p == '\0') && (flags != (int *)NULL))
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*flags |= _PASSWORD_NOUID;
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if (!(p = strsep(&bp, ":"))) /* gid */
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goto fmt;
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id = strtoul(p, &ep, 10);
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if (id > GID_MAX || *ep != '\0') {
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if (!(inflags & _PASSWORD_NOWARN))
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warnx("invalid gid '%s'", p);
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return (0);
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}
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pw->pw_gid = (gid_t)id;
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if ((*p == '\0') && (flags != (int *)NULL))
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*flags |= _PASSWORD_NOGID;
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if (inflags & _PASSWORD_OLDFMT) {
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pw->pw_class = "";
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pw->pw_change = 0;
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pw->pw_expire = 0;
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*flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP);
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} else {
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pw->pw_class = strsep(&bp, ":"); /* class */
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if (!(p = strsep(&bp, ":"))) /* change */
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goto fmt;
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pw->pw_change = atol(p);
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if ((*p == '\0') && (flags != (int *)NULL))
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*flags |= _PASSWORD_NOCHG;
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if (!(p = strsep(&bp, ":"))) /* expire */
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goto fmt;
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pw->pw_expire = atol(p);
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if ((*p == '\0') && (flags != (int *)NULL))
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*flags |= _PASSWORD_NOEXP;
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}
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pw->pw_gecos = strsep(&bp, ":"); /* gecos */
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pw->pw_dir = strsep(&bp, ":"); /* directory */
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if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
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goto fmt;
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#if !HAVE_CONFIG_H
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p = pw->pw_shell;
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if (root && *p) /* empty == /bin/sh */
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for (setusershell();;) {
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if (!(sh = getusershell())) {
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if (!(inflags & _PASSWORD_NOWARN))
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warnx("warning, unknown root shell");
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break;
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}
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if (!strcmp(p, sh))
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break;
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}
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#endif
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if ((p = strsep(&bp, ":")) != NULL) { /* too many */
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fmt:
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if (!(inflags & _PASSWORD_NOWARN))
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warnx("corrupted entry");
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return (0);
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}
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return (1);
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}
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