[apple/system_cmds.git] / pwd_mkdb.tproj / pw_scan.c

/*	$OpenBSD: passwd.c,v 1.42 2003/06/26 16:34:42 deraadt 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 defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$OpenBSD: passwd.c,v 1.42 2003/06/26 16:34:42 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>

#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <pwd.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <signal.h>
#include <limits.h>

#include "util.h"

int
pw_scan(char *bp, struct passwd *pw, int *flags)
{
	u_long id;
	int root;
	char *p, *sh, *p2;

	if (flags != (int *)NULL)
		*flags = 0;

	if (!(p = strsep(&bp, ":")) || *p == '\0')	/* login */
		goto fmt;
	pw->pw_name = p;
	root = !strcmp(pw->pw_name, "root");

	if (!(pw->pw_passwd = strsep(&bp, ":")))	/* passwd */
		goto fmt;

	if (!(p = strsep(&bp, ":")))			/* uid */
		goto fmt;
	id = strtoul(p, &p2, 10);
	if (root && id) {
		warnx("root uid should be 0");
		return (0);
	}
	if (*p2 != '\0') {
		warnx("illegal uid field");
		return (0);
	}
#ifndef __APPLE__
	/* Apple's UID_MAX is too small (sizeof signed) 3091256 */
	if (id > UID_MAX) {
		/* errno is set to ERANGE by strtoul(3) */
		warnx("uid greater than %u", UID_MAX-1);
		return (0);
	}
#endif
	pw->pw_uid = (uid_t)id;
	if ((*p == '\0') && (flags != (int *)NULL))
		*flags |= _PASSWORD_NOUID;

	if (!(p = strsep(&bp, ":")))			/* gid */
		goto fmt;
	id = strtoul(p, &p2, 10);
	if (*p2 != '\0') {
		warnx("illegal gid field");
		return (0);
	}
#ifndef __APPLE__
	/* Apple's UID_MAX is too small (sizeof signed) 3091256 */
	if (id > UID_MAX) {
		/* errno is set to ERANGE by strtoul(3) */
		warnx("gid greater than %u", UID_MAX-1);
		return (0);
	}
#endif
	pw->pw_gid = (gid_t)id;
	if ((*p == '\0') && (flags != (int *)NULL))
		*flags |= _PASSWORD_NOGID;

	pw->pw_class = strsep(&bp, ":");		/* class */
	if (!(p = strsep(&bp, ":")))			/* change */
		goto fmt;
	pw->pw_change = atol(p);
	if ((*p == '\0') && (flags != (int *)NULL))
		*flags |= _PASSWORD_NOCHG;
	if (!(p = strsep(&bp, ":")))			/* expire */
		goto fmt;
	pw->pw_expire = atol(p);
	if ((*p == '\0') && (flags != (int *)NULL))
		*flags |= _PASSWORD_NOEXP;
	pw->pw_gecos = strsep(&bp, ":");		/* gecos */
	pw->pw_dir = strsep(&bp, ":");			/* directory */
	if (!(pw->pw_shell = strsep(&bp, ":")))		/* shell */
		goto fmt;

	p = pw->pw_shell;
	if (root && *p) {				/* empty == /bin/sh */
		for (setusershell();;) {
			if (!(sh = getusershell())) {
				warnx("warning, unknown root shell");
				break;
			}
			if (!strcmp(p, sh))
				break;
		}
		endusershell();
	}

	if ((p = strsep(&bp, ":"))) {			/* too many */
fmt:		warnx("corrupted entry");
		return (0);
	}

	return (1);
}
Commit	Line	Data
c3a08f59 A	1	/* $OpenBSD: passwd.c,v 1.42 2003/06/26 16:34:42 deraadt Exp $ */
c3a08f59 A	2
1815bff5	3	/*
c3a08f59	4	* Copyright (c) 1987, 1993, 1994, 1995
1815bff5 A	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
c3a08f59	15	* 3. Neither the name of the University nor the names of its contributors
1815bff5 A	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
c3a08f59 A	32	#if defined(LIBC_SCCS) && !defined(lint)
	33	static const char rcsid[] = "$OpenBSD: passwd.c,v 1.42 2003/06/26 16:34:42 deraadt Exp $";
	34	#endif /* LIBC_SCCS and not lint */
1815bff5	35
c3a08f59 A	36	#include <sys/types.h>
	37	#include <sys/stat.h>
	38	#include <sys/time.h>
	39	#include <sys/resource.h>
	40	#include <sys/wait.h>
1815bff5	41
1815bff5	42	#include <fcntl.h>
c3a08f59 A	43	#include <unistd.h>
c3a08f59 A	44	#include <stdlib.h>
1815bff5 A	45	#include <stdio.h>
1815bff5 A	46	#include <string.h>
c3a08f59 A	47	#include <ctype.h>
	48	#include <pwd.h>
	49	#include <err.h>
	50	#include <errno.h>
	51	#include <paths.h>
	52	#include <signal.h>
	53	#include <limits.h>
1815bff5	54
c3a08f59	55	#include "util.h"
1815bff5 A	56
1815bff5 A	57	int
c3a08f59	58	pw_scan(char bp, struct passwd pw, int *flags)
1815bff5	59	{
c3a08f59	60	u_long id;
1815bff5	61	int root;
c3a08f59 A	62	char p, sh, *p2;
	63
	64	if (flags != (int *)NULL)
	65	*flags = 0;
1815bff5	66
c3a08f59	67	if (!(p = strsep(&bp, ":")) \|\| p == '\0') / login */
1815bff5	68	goto fmt;
c3a08f59	69	pw->pw_name = p;
1815bff5 A	70	root = !strcmp(pw->pw_name, "root");
	71
	72	if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
	73	goto fmt;
	74
	75	if (!(p = strsep(&bp, ":"))) /* uid */
	76	goto fmt;
c3a08f59	77	id = strtoul(p, &p2, 10);
1815bff5 A	78	if (root && id) {
	79	warnx("root uid should be 0");
	80	return (0);
	81	}
c3a08f59 A	82	if (*p2 != '\0') {
c3a08f59 A	83	warnx("illegal uid field");
1815bff5 A	84	return (0);
1815bff5 A	85	}
c3a08f59 A	86	#ifndef __APPLE__
	87	/* Apple's UID_MAX is too small (sizeof signed) 3091256 */
	88	if (id > UID_MAX) {
	89	/* errno is set to ERANGE by strtoul(3) */
	90	warnx("uid greater than %u", UID_MAX-1);
	91	return (0);
	92	}
	93	#endif
	94	pw->pw_uid = (uid_t)id;
	95	if ((p == '\0') && (flags != (int )NULL))
	96	*flags \|= _PASSWORD_NOUID;
1815bff5 A	97
	98	if (!(p = strsep(&bp, ":"))) /* gid */
	99	goto fmt;
c3a08f59 A	100	id = strtoul(p, &p2, 10);
	101	if (*p2 != '\0') {
	102	warnx("illegal gid field");
	103	return (0);
20e66415	104	}
c3a08f59 A	105	#ifndef __APPLE__
	106	/* Apple's UID_MAX is too small (sizeof signed) 3091256 */
	107	if (id > UID_MAX) {
	108	/* errno is set to ERANGE by strtoul(3) */
	109	warnx("gid greater than %u", UID_MAX-1);
1815bff5 A	110	return (0);
1815bff5 A	111	}
c3a08f59 A	112	#endif
	113	pw->pw_gid = (gid_t)id;
	114	if ((p == '\0') && (flags != (int )NULL))
	115	*flags \|= _PASSWORD_NOGID;
1815bff5 A	116
	117	pw->pw_class = strsep(&bp, ":"); /* class */
	118	if (!(p = strsep(&bp, ":"))) /* change */
	119	goto fmt;
	120	pw->pw_change = atol(p);
c3a08f59 A	121	if ((p == '\0') && (flags != (int )NULL))
c3a08f59 A	122	*flags \|= _PASSWORD_NOCHG;
1815bff5 A	123	if (!(p = strsep(&bp, ":"))) /* expire */
	124	goto fmt;
	125	pw->pw_expire = atol(p);
c3a08f59 A	126	if ((p == '\0') && (flags != (int )NULL))
c3a08f59 A	127	*flags \|= _PASSWORD_NOEXP;
1815bff5 A	128	pw->pw_gecos = strsep(&bp, ":"); /* gecos */
	129	pw->pw_dir = strsep(&bp, ":"); /* directory */
	130	if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
	131	goto fmt;
	132
	133	p = pw->pw_shell;
c3a08f59	134	if (root && p) { / empty == /bin/sh */
1815bff5 A	135	for (setusershell();;) {
	136	if (!(sh = getusershell())) {
	137	warnx("warning, unknown root shell");
	138	break;
	139	}
	140	if (!strcmp(p, sh))
c3a08f59	141	break;
1815bff5	142	}
c3a08f59 A	143	endusershell();
c3a08f59 A	144	}
1815bff5	145
c3a08f59	146	if ((p = strsep(&bp, ":"))) { /* too many */
1815bff5 A	147	fmt: warnx("corrupted entry");
	148	return (0);
	149	}
c3a08f59	150
1815bff5 A	151	return (1);
1815bff5 A	152	}