minix/lib/libc/gen/pw_scan.c

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/* $NetBSD: pw_scan.c,v 1.22 2009/01/29 10:41:39 enami Exp $ */
/*
* Copyright (c) 1987, 1993, 1994, 1995
* 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#include "compat_pwd.h"
#else
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: pw_scan.c,v 1.22 2009/01/29 10:41:39 enami Exp $");
#endif /* LIBC_SCCS and not lint */
#if defined(_LIBC)
#include "namespace.h"
#endif
#include <sys/types.h>
#include <assert.h>
#include <err.h>
#include <limits.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#ifdef _LIBC
#include "pw_private.h"
#endif
#endif /* ! HAVE_NBTOOL_CONFIG_H */
static int
gettime(long long *res, const char *p, int *flags, int dowarn, int flag)
{
long long l;
char *ep;
const char *vp;
if (*p == '\0') {
*flags |= flag;
*res = 0;
return 1;
}
l = strtoll(p, &ep, 0);
if (p == ep || *ep != '\0') {
vp = "Invalid number";
goto done;
}
if (errno == ERANGE && (l == LLONG_MAX || l == LLONG_MIN)) {
vp = strerror(errno);
goto done;
}
*res = l;
return 1;
done:
if (dowarn) {
warnx("%s `%s' for %s time", vp, p,
flag == _PASSWORD_NOEXP ? "expiration" : "change");
}
return 0;
}
static int
getid(unsigned long *res, const char *p, int *flags, int dowarn, int flag)
{
unsigned long ul;
char *ep;
if (*p == '\0') {
*flags |= flag;
*res = 0;
return 1;
}
ul = strtoul(p, &ep, 0);
if (p == ep || *ep != '\0') {
ep = __UNCONST("Invalid number");
goto done;
}
if (errno == ERANGE && ul == ULONG_MAX) {
ep = strerror(errno);
goto done;
}
if (ul > *res) {
ep = strerror(ERANGE);
goto done;
}
*res = ul;
return 1;
done:
if (dowarn)
warnx("%s %s `%s'", ep,
flag == _PASSWORD_NOUID ? "uid" : "gid", p);
return 0;
}
int
#ifdef _LIBC
__pw_scan(char *bp, struct passwd *pw, int *flags)
#else
pw_scan( char *bp, struct passwd *pw, int *flags)
#endif
{
unsigned long id;
long long ti;
int root, inflags;
int dowarn;
const char *p, *sh;
_DIAGASSERT(bp != NULL);
_DIAGASSERT(pw != NULL);
if (flags) {
inflags = *flags;
*flags = 0;
} else {
inflags = 0;
flags = &inflags;
}
dowarn = !(inflags & _PASSWORD_NOWARN);
if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
goto fmt;
if (strlen(pw->pw_name) > (LOGIN_NAME_MAX - 1)) {
if (dowarn)
warnx("username too long, `%s' > %d", pw->pw_name,
LOGIN_NAME_MAX - 1);
return 0;
}
root = !strcmp(pw->pw_name, "root");
if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
goto fmt;
if (!(p = strsep(&bp, ":"))) /* uid */
goto fmt;
id = UID_MAX;
if (!getid(&id, p, flags, dowarn, _PASSWORD_NOUID))
return 0;
if (root && id) {
if (dowarn)
warnx("root uid should be 0");
return 0;
}
pw->pw_uid = (uid_t)id;
if (!(p = strsep(&bp, ":"))) /* gid */
goto fmt;
id = GID_MAX;
if (!getid(&id, p, flags, dowarn, _PASSWORD_NOGID))
return 0;
pw->pw_gid = (gid_t)id;
if (inflags & _PASSWORD_OLDFMT) {
pw->pw_class = __UNCONST("");
pw->pw_change = 0;
pw->pw_expire = 0;
*flags |= (_PASSWORD_NOCHG | _PASSWORD_NOEXP);
} else {
pw->pw_class = strsep(&bp, ":"); /* class */
if (!(p = strsep(&bp, ":"))) /* change */
goto fmt;
if (!gettime(&ti, p, flags, dowarn, _PASSWORD_NOCHG))
return 0;
pw->pw_change = ti;
if (!(p = strsep(&bp, ":"))) /* expire */
goto fmt;
if (!gettime(&ti, p, flags, dowarn, _PASSWORD_NOEXP))
return 0;
pw->pw_expire = ti;
}
pw->pw_gecos = strsep(&bp, ":"); /* gecos */
pw->pw_dir = strsep(&bp, ":"); /* directory */
if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
goto fmt;
#if ! HAVE_NBTOOL_CONFIG_H
p = pw->pw_shell;
if (root && *p) /* empty == /bin/sh */
for (setusershell();;) {
if (!(sh = getusershell())) {
if (dowarn)
warnx("warning, unknown root shell");
break;
}
if (!strcmp(p, sh))
break;
}
#endif
if ((p = strsep(&bp, ":")) != NULL) { /* too many */
fmt:
if (dowarn)
warnx("corrupted entry");
return 0;
}
return 1;
}