[apple/network_cmds.git] / rpc_yppasswdd.tproj / passwd.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*	$NetBSD: passwd.c,v 1.11 1997/12/31 05:47:15 thorpej 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: passwd.c,v 1.11 1997/12/31 05:47:15 thorpej 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 <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pwd.h>
#include <errno.h>
#include <paths.h>
#include <signal.h>
#include <limits.h>
#include <util.h>

static void	pw_cont __P((int sig));
static int	pw_equal __P((char *buf, struct passwd *old_pw));

int
pw_lock(retries)
	int retries;
{
	int i, fd;
	mode_t old_mode;

	/* Acquire the lock file. */
	old_mode = umask(0);
	fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY|O_CREAT|O_EXCL, 0600);
	for (i = 0; i < retries && fd < 0 && errno == EEXIST; i++) {
		sleep(1);
		fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY|O_CREAT|O_EXCL,
			  0600);
	}
	umask(old_mode);
	return(fd);
}

int
pw_mkdb()
{
	int pstat;
	pid_t pid;
	struct stat sb;

	/* A zero length passwd file is never ok */
	if (stat(_PATH_MASTERPASSWD_LOCK, &sb) == 0) {
		if (sb.st_size == 0) {
			warnx("%s is zero length", _PATH_MASTERPASSWD_LOCK);
			return (-1);
		}
	}

	pid = vfork();
	if (pid == 0) {
		execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p",
		      _PATH_MASTERPASSWD_LOCK, NULL);
		_exit(1);
	}
	pid = waitpid(pid, &pstat, 0);
	if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0)
		return(-1);
	return(0);
}

int
pw_abort()
{
	return(unlink(_PATH_MASTERPASSWD_LOCK));
}

/* Everything below this point is intended for the convenience of programs
 * which allow a user to interactively edit the passwd file.  Errors in the
 * routines below will cause the process to abort. */

static pid_t editpid = -1;

static void
pw_cont(sig)
	int sig;
{

	if (editpid != -1)
		kill(editpid, sig);
}

void
pw_init()
{
	struct rlimit rlim;

	/* Unlimited resource limits. */
	rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
	(void)setrlimit(RLIMIT_CPU, &rlim);
	(void)setrlimit(RLIMIT_FSIZE, &rlim);
	(void)setrlimit(RLIMIT_STACK, &rlim);
	(void)setrlimit(RLIMIT_DATA, &rlim);
	(void)setrlimit(RLIMIT_RSS, &rlim);

	/* Don't drop core (not really necessary, but GP's). */
	rlim.rlim_cur = rlim.rlim_max = 0;
	(void)setrlimit(RLIMIT_CORE, &rlim);

	/* Turn off signals. */
	(void)signal(SIGALRM, SIG_IGN);
	(void)signal(SIGHUP, SIG_IGN);
	(void)signal(SIGINT, SIG_IGN);
	(void)signal(SIGPIPE, SIG_IGN);
	(void)signal(SIGQUIT, SIG_IGN);
	(void)signal(SIGTERM, SIG_IGN);
	(void)signal(SIGCONT, pw_cont);
}

void
pw_edit(notsetuid, filename)
	int notsetuid;
	const char *filename;
{
	int i, xargc, pstat;
	char *p, *editor;
	char **xargv;
#ifdef __GNUC__
	(void) &editor;
#endif

	if (filename == NULL)
		filename = _PATH_MASTERPASSWD_LOCK;
	if ((editor = getenv("EDITOR")) == NULL)
		editor = strdup(_PATH_VI);
	else
		editor = strdup(editor);
	if ((p = strrchr(editor, '/')))
		++p;
	else
		p = editor;

	/* Scan editor string, count spaces, allocate arg vector. */
	for (i = 0, xargc = 0; p[i] != '\0'; i++) {
		if (isspace(p[i])) {
			while (isspace(p[i++]))
				/* skip white space */ ;
			if (p[i] == '\0')
				break;
			xargc++;
		}
	}

	/* argv[0] + <xargc args> + filename + NULL */
	xargv = (char **)malloc(sizeof(char *) * (xargc + 3));
	if (xargv == NULL)
		pw_error("malloc failed", 1, 1);

	i = 0;
	xargv[i++] = p;
	for (; *p != '\0'; p++) {
		if (isspace(*p)) {
			while(isspace(*p))
				*p++ = '\0';	/* blast whitespace */
			if (*p == '\0')
				break;
			xargv[i++] = p;
		}
	}

	xargv[i++] = (char *)filename;
	xargv[i] = NULL;

	if (!(editpid = vfork())) {
		if (notsetuid) {
			setgid(getgid());
			setuid(getuid());
		}
		execvp(editor, xargv);
		_exit(1);
	}
	for (;;) {
		editpid = waitpid(editpid, (int *)&pstat, WUNTRACED);
		if (editpid == -1)
			pw_error(editor, 1, 1);
		else if (WIFSTOPPED(pstat))
			raise(WSTOPSIG(pstat));
		else if (WIFEXITED(pstat) && WEXITSTATUS(pstat) == 0)
			break;
		else
			pw_error(editor, 1, 1);
	}
	editpid = -1;
	free(editor);
	free(xargv);
}

void
pw_prompt()
{
	int c;

	(void)printf("re-edit the password file? [y]: ");
	(void)fflush(stdout);
	c = getchar();
	if (c != EOF && c != '\n')
		while (getchar() != '\n');
	if (c == 'n')
		pw_error(NULL, 0, 0);
}

/* for use in pw_copy(). Compare a pw entry to a pw struct. */
static int
pw_equal (buf, pw)
	char *buf;
	struct passwd *pw;
{
	struct passwd buf_pw;
	int len = strlen (buf);
	if (buf[len-1] == '\n')
		buf[len-1] = '\0';
	if (!pw_scan(buf, &buf_pw, NULL))
		return 0;
	return !strcmp(pw->pw_name, buf_pw.pw_name)
		&& pw->pw_uid == buf_pw.pw_uid
		&& pw->pw_gid == buf_pw.pw_gid
		&& !strcmp(pw->pw_class, buf_pw.pw_class)
		&& (long)pw->pw_change == (long)buf_pw.pw_change
		&& (long)pw->pw_expire == (long)buf_pw.pw_expire
		&& !strcmp(pw->pw_gecos, buf_pw.pw_gecos)
		&& !strcmp(pw->pw_dir, buf_pw.pw_dir)
		&& !strcmp(pw->pw_shell, buf_pw.pw_shell);
}

void
pw_copy(ffd, tfd, pw, old_pw)
	int ffd, tfd;
	struct passwd *pw, *old_pw;
{
	FILE *from, *to;
	int done;
	char *p, buf[8192];

	if (!(from = fdopen(ffd, "r")))
		pw_error(_PATH_MASTERPASSWD, 1, 1);
	if (!(to = fdopen(tfd, "w")))
		pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);

	for (done = 0; fgets(buf, sizeof(buf), from);) {
		if (!strchr(buf, '\n')) {
			warnx("%s: line too long", _PATH_MASTERPASSWD);
			pw_error(NULL, 0, 1);
		}
		if (done) {
			(void)fprintf(to, "%s", buf);
			if (ferror(to))
				goto err;
			continue;
		}
		if (buf[0] == '#') {
			/* skip comments for Rhapsody. */
			continue;
		}
		if (!(p = strchr(buf, ':'))) {
			warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
			pw_error(NULL, 0, 1);
		}
		*p = '\0';
		if (strcmp(buf, pw->pw_name)) {
			*p = ':';
			(void)fprintf(to, "%s", buf);
			if (ferror(to))
				goto err;
			continue;
		}
		*p = ':';
		if (old_pw && !pw_equal(buf, old_pw)) {
			warnx("%s: entry inconsistent",
			      _PATH_MASTERPASSWD);
			pw_error(NULL, 0, 1);
		}
		(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
		    pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
		    pw->pw_class, (long)pw->pw_change, (long)pw->pw_expire,
		    pw->pw_gecos, pw->pw_dir, pw->pw_shell);
		done = 1;
		if (ferror(to))
			goto err;
	}
	/* Only append a new entry if real uid is root! */
	if (!done) 
		if (getuid() == 0)
			(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
			    pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
			    pw->pw_class, (long)pw->pw_change,
			    (long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
			    pw->pw_shell);
		else
			warnx("%s: changes not made, no such entry",
		      	    _PATH_MASTERPASSWD);

	if (ferror(to))
err:		pw_error(NULL, 1, 1);
	(void)fclose(to);
}

int
pw_scan(bp, pw, flags)
	char *bp;
	struct passwd *pw;
	int *flags;
{
	unsigned long id;
	int root;
	char *p, *sh, *ep;

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

	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
		goto fmt;
	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, &ep, 10);
	if (root && id) {
		warnx("root uid should be 0");
		return (0);
	}
	if (id > UID_MAX || *ep != '\0') {
		warnx("invalid uid '%s'", p);
		return (0);
	}
	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, &ep, 10);
	if (id > GID_MAX || *ep != '\0') {
		warnx("invalid gid '%s'", p);
		return (0);
	}
	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;	
		}

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

	return (1);
}

void
pw_error(name, err, eval)
	const char *name;
	int err, eval;
{
	if (err)
		warn(name);

	warnx("%s: unchanged", _PATH_MASTERPASSWD);
	pw_abort();
	exit(eval);
}
Commit	Line	Data
b7080c8e A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.0 (the 'License'). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License."
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/* $NetBSD: passwd.c,v 1.11 1997/12/31 05:47:15 thorpej Exp $ */
	25
	26	/*
	27	* Copyright (c) 1987, 1993, 1994, 1995
	28	* The Regents of the University of California. All rights reserved.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*/
	58
	59	#include <sys/cdefs.h>
	60	#if defined(LIBC_SCCS) && !defined(lint)
	61	__RCSID("$NetBSD: passwd.c,v 1.11 1997/12/31 05:47:15 thorpej Exp $");
	62	#endif /* LIBC_SCCS and not lint */
	63
	64	#include <sys/types.h>
65	#include <sys/stat.h>
66	#include <sys/time.h>
67	#include <sys/resource.h>
68	#include <sys/wait.h>
69
70	#include <ctype.h>
71	#include <err.h>
72	#include <fcntl.h>
73	#include <unistd.h>
74	#include <stdlib.h>
75	#include <stdio.h>
76	#include <string.h>
77	#include <pwd.h>
78	#include <errno.h>
79	#include <paths.h>
80	#include <signal.h>
81	#include <limits.h>
82	#include <util.h>
83
84	static void pw_cont __P((int sig));
85	static int pw_equal __P((char buf, struct passwd old_pw));
86
87	int
88	pw_lock(retries)
89	int retries;
90	{
91	int i, fd;
92	mode_t old_mode;
93
94	/* Acquire the lock file. */
95	old_mode = umask(0);
96	fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY\|O_CREAT\|O_EXCL, 0600);
97	for (i = 0; i < retries && fd < 0 && errno == EEXIST; i++) {
98	sleep(1);
99	fd = open(_PATH_MASTERPASSWD_LOCK, O_WRONLY\|O_CREAT\|O_EXCL,
100	0600);
101	}
102	umask(old_mode);
103	return(fd);
104	}
105
106	int
107	pw_mkdb()
108	{
109	int pstat;
110	pid_t pid;
111	struct stat sb;
112
113	/* A zero length passwd file is never ok */
114	if (stat(_PATH_MASTERPASSWD_LOCK, &sb) == 0) {
115	if (sb.st_size == 0) {
116	warnx("%s is zero length", _PATH_MASTERPASSWD_LOCK);
117	return (-1);
118	}
119	}
120
121	pid = vfork();
122	if (pid == 0) {
123	execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p",
124	_PATH_MASTERPASSWD_LOCK, NULL);
125	_exit(1);
126	}
127	pid = waitpid(pid, &pstat, 0);
128	if (pid == -1 \|\| !WIFEXITED(pstat) \|\| WEXITSTATUS(pstat) != 0)
129	return(-1);
130	return(0);
131	}
132
133	int
134	pw_abort()
135	{
136	return(unlink(_PATH_MASTERPASSWD_LOCK));
137	}
138
139	/* Everything below this point is intended for the convenience of programs
140	* which allow a user to interactively edit the passwd file. Errors in the
141	* routines below will cause the process to abort. */
142
143	static pid_t editpid = -1;
144
145	static void
146	pw_cont(sig)
147	int sig;
148	{
149
150	if (editpid != -1)
151	kill(editpid, sig);
152	}
153
154	void
155	pw_init()
156	{
157	struct rlimit rlim;
158
159	/* Unlimited resource limits. */
160	rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
161	(void)setrlimit(RLIMIT_CPU, &rlim);
162	(void)setrlimit(RLIMIT_FSIZE, &rlim);
163	(void)setrlimit(RLIMIT_STACK, &rlim);
164	(void)setrlimit(RLIMIT_DATA, &rlim);
165	(void)setrlimit(RLIMIT_RSS, &rlim);
166
167	/* Don't drop core (not really necessary, but GP's). */
168	rlim.rlim_cur = rlim.rlim_max = 0;
169	(void)setrlimit(RLIMIT_CORE, &rlim);
170
171	/* Turn off signals. */
172	(void)signal(SIGALRM, SIG_IGN);
173	(void)signal(SIGHUP, SIG_IGN);
174	(void)signal(SIGINT, SIG_IGN);
175	(void)signal(SIGPIPE, SIG_IGN);
176	(void)signal(SIGQUIT, SIG_IGN);
177	(void)signal(SIGTERM, SIG_IGN);
178	(void)signal(SIGCONT, pw_cont);
179	}
180
181	void
182	pw_edit(notsetuid, filename)
183	int notsetuid;
184	const char *filename;
185	{
186	int i, xargc, pstat;
187	char p, editor;
188	char **xargv;
189	#ifdef __GNUC__
190	(void) &editor;
191	#endif
192
193	if (filename == NULL)
194	filename = _PATH_MASTERPASSWD_LOCK;
195	if ((editor = getenv("EDITOR")) == NULL)
196	editor = strdup(_PATH_VI);
197	else
198	editor = strdup(editor);
199	if ((p = strrchr(editor, '/')))
200	++p;
201	else
202	p = editor;
203
204	/* Scan editor string, count spaces, allocate arg vector. */
205	for (i = 0, xargc = 0; p[i] != '\0'; i++) {
206	if (isspace(p[i])) {
207	while (isspace(p[i++]))
208	/* skip white space */ ;
209	if (p[i] == '\0')
210	break;
211	xargc++;
212	}
213	}
214
215	/* argv[0] + <xargc args> + filename + NULL */
216	xargv = (char *)malloc(sizeof(char ) * (xargc + 3));
217	if (xargv == NULL)
218	pw_error("malloc failed", 1, 1);
219
220	i = 0;
221	xargv[i++] = p;
222	for (; *p != '\0'; p++) {
223	if (isspace(*p)) {
224	while(isspace(*p))
225	p++ = '\0'; / blast whitespace */
226	if (*p == '\0')
227	break;
228	xargv[i++] = p;
229	}
230	}
231
232	xargv[i++] = (char *)filename;
233	xargv[i] = NULL;
234
235	if (!(editpid = vfork())) {
236	if (notsetuid) {
237	setgid(getgid());
238	setuid(getuid());
239	}
240	execvp(editor, xargv);
241	_exit(1);
242	}
243	for (;;) {
244	editpid = waitpid(editpid, (int *)&pstat, WUNTRACED);
245	if (editpid == -1)
246	pw_error(editor, 1, 1);
247	else if (WIFSTOPPED(pstat))
248	raise(WSTOPSIG(pstat));
249	else if (WIFEXITED(pstat) && WEXITSTATUS(pstat) == 0)
250	break;
251	else
252	pw_error(editor, 1, 1);
253	}
254	editpid = -1;
255	free(editor);
256	free(xargv);
257	}
258
259	void
260	pw_prompt()
261	{
262	int c;
263
264	(void)printf("re-edit the password file? [y]: ");
265	(void)fflush(stdout);
266	c = getchar();
267	if (c != EOF && c != '\n')
268	while (getchar() != '\n');
269	if (c == 'n')
270	pw_error(NULL, 0, 0);
271	}
272
273	/* for use in pw_copy(). Compare a pw entry to a pw struct. */
274	static int
275	pw_equal (buf, pw)
276	char *buf;
277	struct passwd *pw;
278	{
279	struct passwd buf_pw;
280	int len = strlen (buf);
281	if (buf[len-1] == '\n')
282	buf[len-1] = '\0';
283	if (!pw_scan(buf, &buf_pw, NULL))
284	return 0;
285	return !strcmp(pw->pw_name, buf_pw.pw_name)
286	&& pw->pw_uid == buf_pw.pw_uid
287	&& pw->pw_gid == buf_pw.pw_gid
288	&& !strcmp(pw->pw_class, buf_pw.pw_class)
289	&& (long)pw->pw_change == (long)buf_pw.pw_change
290	&& (long)pw->pw_expire == (long)buf_pw.pw_expire
291	&& !strcmp(pw->pw_gecos, buf_pw.pw_gecos)
292	&& !strcmp(pw->pw_dir, buf_pw.pw_dir)
293	&& !strcmp(pw->pw_shell, buf_pw.pw_shell);
294	}
295
296	void
297	pw_copy(ffd, tfd, pw, old_pw)
298	int ffd, tfd;
299	struct passwd pw, old_pw;
300	{
301	FILE from, to;
302	int done;
303	char *p, buf[8192];
304
305	if (!(from = fdopen(ffd, "r")))
306	pw_error(_PATH_MASTERPASSWD, 1, 1);
307	if (!(to = fdopen(tfd, "w")))
308	pw_error(_PATH_MASTERPASSWD_LOCK, 1, 1);
309
310	for (done = 0; fgets(buf, sizeof(buf), from);) {
311	if (!strchr(buf, '\n')) {
312	warnx("%s: line too long", _PATH_MASTERPASSWD);
313	pw_error(NULL, 0, 1);
314	}
315	if (done) {
316	(void)fprintf(to, "%s", buf);
317	if (ferror(to))
318	goto err;
319	continue;
320	}
321	if (buf[0] == '#') {
322	/* skip comments for Rhapsody. */
323	continue;
324	}
325	if (!(p = strchr(buf, ':'))) {
326	warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
327	pw_error(NULL, 0, 1);
328	}
329	*p = '\0';
330	if (strcmp(buf, pw->pw_name)) {
331	*p = ':';
332	(void)fprintf(to, "%s", buf);
333	if (ferror(to))
334	goto err;
335	continue;
336	}
337	*p = ':';
338	if (old_pw && !pw_equal(buf, old_pw)) {
339	warnx("%s: entry inconsistent",
340	_PATH_MASTERPASSWD);
341	pw_error(NULL, 0, 1);
342	}
343	(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
344	pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
345	pw->pw_class, (long)pw->pw_change, (long)pw->pw_expire,
346	pw->pw_gecos, pw->pw_dir, pw->pw_shell);
347	done = 1;
348	if (ferror(to))
349	goto err;
350	}
351	/* Only append a new entry if real uid is root! */
352	if (!done)
353	if (getuid() == 0)
354	(void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
355	pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
356	pw->pw_class, (long)pw->pw_change,
357	(long)pw->pw_expire, pw->pw_gecos, pw->pw_dir,
358	pw->pw_shell);
359	else
360	warnx("%s: changes not made, no such entry",
361	_PATH_MASTERPASSWD);
362
363	if (ferror(to))
364	err: pw_error(NULL, 1, 1);
365	(void)fclose(to);
366	}
367
368	int
369	pw_scan(bp, pw, flags)
370	char *bp;
371	struct passwd *pw;
372	int *flags;
373	{
374	unsigned long id;
375	int root;
376	char p, sh, *ep;
377
378	if (flags != (int *)NULL)
379	*flags = 0;
380
381	if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
382	goto fmt;
383	root = !strcmp(pw->pw_name, "root");
384
385	if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
386	goto fmt;
387
388	if (!(p = strsep(&bp, ":"))) /* uid */
389	goto fmt;
390	id = strtoul(p, &ep, 10);
391	if (root && id) {
392	warnx("root uid should be 0");
393	return (0);
394	}
395	if (id > UID_MAX \|\| *ep != '\0') {
396	warnx("invalid uid '%s'", p);
397	return (0);
398	}
399	pw->pw_uid = (uid_t)id;
400	if ((p == '\0') && (flags != (int )NULL))
401	*flags \|= _PASSWORD_NOUID;
402
403	if (!(p = strsep(&bp, ":"))) /* gid */
404	goto fmt;
405	id = strtoul(p, &ep, 10);
406	if (id > GID_MAX \|\| *ep != '\0') {
407	warnx("invalid gid '%s'", p);
408	return (0);
409	}
410	pw->pw_gid = (gid_t)id;
411	if ((p == '\0') && (flags != (int )NULL))
412	*flags \|= _PASSWORD_NOGID;
413
414	pw->pw_class = strsep(&bp, ":"); /* class */
415	if (!(p = strsep(&bp, ":"))) /* change */
416	goto fmt;
417	pw->pw_change = atol(p);
418	if ((p == '\0') && (flags != (int )NULL))
419	*flags \|= _PASSWORD_NOCHG;
420	if (!(p = strsep(&bp, ":"))) /* expire */
421	goto fmt;
422	pw->pw_expire = atol(p);
423	if ((p == '\0') && (flags != (int )NULL))
424	*flags \|= _PASSWORD_NOEXP;
425	pw->pw_gecos = strsep(&bp, ":"); /* gecos */
426	pw->pw_dir = strsep(&bp, ":"); /* directory */
427	if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
428	goto fmt;
429
430	p = pw->pw_shell;
431	if (root && p) / empty == /bin/sh */
432	for (setusershell();;) {
433	if (!(sh = getusershell())) {
434	warnx("warning, unknown root shell");
435	break;
436	}
437	if (!strcmp(p, sh))
438	break;
439	}
440
441	if ((p = strsep(&bp, ":"))) { /* too many */
442	fmt: warnx("corrupted entry");
443	return (0);
444	}
445
446	return (1);
447	}
448
449	void
450	pw_error(name, err, eval)
451	const char *name;
452	int err, eval;
453	{
454	if (err)
455	warn(name);
456
457	warnx("%s: unchanged", _PATH_MASTERPASSWD);
458	pw_abort();
459	exit(eval);
460	}
461