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edit.c revision 1.17
      1  1.17       dsl /*	$NetBSD: edit.c,v 1.17 2004/10/30 17:11:24 dsl Exp $	*/
      2   1.4     glass 
      3   1.1       cgd /*-
      4   1.4     glass  * Copyright (c) 1990, 1993, 1994
      5   1.4     glass  *	The Regents of the University of California.  All rights reserved.
      6   1.1       cgd  *
      7   1.1       cgd  * Redistribution and use in source and binary forms, with or without
      8   1.1       cgd  * modification, are permitted provided that the following conditions
      9   1.1       cgd  * are met:
     10   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     11   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     12   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     14   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     15  1.16       agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1       cgd  *    may be used to endorse or promote products derived from this software
     17   1.1       cgd  *    without specific prior written permission.
     18   1.1       cgd  *
     19   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1       cgd  * SUCH DAMAGE.
     30   1.1       cgd  */
     31   1.1       cgd 
     32   1.9     lukem #include <sys/cdefs.h>
     33   1.1       cgd #ifndef lint
     34   1.4     glass #if 0
     35   1.4     glass static char sccsid[] = "@(#)edit.c	8.3 (Berkeley) 4/2/94";
     36   1.4     glass #else
     37  1.17       dsl __RCSID("$NetBSD: edit.c,v 1.17 2004/10/30 17:11:24 dsl Exp $");
     38   1.4     glass #endif
     39   1.1       cgd #endif /* not lint */
     40   1.1       cgd 
     41   1.1       cgd #include <sys/param.h>
     42   1.1       cgd #include <sys/stat.h>
     43   1.4     glass 
     44   1.4     glass #include <ctype.h>
     45   1.4     glass #include <err.h>
     46   1.4     glass #include <errno.h>
     47   1.4     glass #include <paths.h>
     48   1.1       cgd #include <pwd.h>
     49   1.1       cgd #include <stdio.h>
     50   1.1       cgd #include <stdlib.h>
     51   1.1       cgd #include <string.h>
     52   1.4     glass #include <unistd.h>
     53  1.15  christos #include <fcntl.h>
     54   1.6       jtc #include <util.h>
     55   1.4     glass 
     56   1.1       cgd #include "chpass.h"
     57   1.1       cgd 
     58   1.1       cgd void
     59   1.6       jtc edit(tempname, pw)
     60   1.6       jtc 	char *tempname;
     61   1.1       cgd 	struct passwd *pw;
     62   1.1       cgd {
     63   1.1       cgd 	struct stat begin, end;
     64   1.1       cgd 
     65   1.1       cgd 	for (;;) {
     66   1.1       cgd 		if (stat(tempname, &begin))
     67   1.7   thorpej 			(*Pw_error)(tempname, 1, 1);
     68   1.6       jtc 		pw_edit(1, tempname);
     69   1.1       cgd 		if (stat(tempname, &end))
     70   1.7   thorpej 			(*Pw_error)(tempname, 1, 1);
     71   1.1       cgd 		if (begin.st_mtime == end.st_mtime) {
     72   1.4     glass 			warnx("no changes made");
     73   1.7   thorpej 			(*Pw_error)(NULL, 0, 0);
     74   1.1       cgd 		}
     75   1.6       jtc 		if (verify(tempname, pw))
     76   1.1       cgd 			break;
     77   1.7   thorpej #ifdef YP
     78   1.7   thorpej 		if (use_yp)
     79   1.7   thorpej 			yppw_prompt();
     80   1.7   thorpej 		else
     81   1.7   thorpej #endif
     82   1.7   thorpej 			pw_prompt();
     83   1.1       cgd 	}
     84   1.1       cgd }
     85   1.1       cgd 
     86   1.1       cgd /*
     87   1.1       cgd  * display --
     88   1.1       cgd  *	print out the file for the user to edit; strange side-effect:
     89   1.1       cgd  *	set conditional flag if the user gets to edit the shell.
     90   1.1       cgd  */
     91   1.4     glass void
     92   1.6       jtc display(tempname, fd, pw)
     93   1.6       jtc 	char *tempname;
     94   1.1       cgd 	int fd;
     95   1.1       cgd 	struct passwd *pw;
     96   1.1       cgd {
     97   1.1       cgd 	FILE *fp;
     98   1.9     lukem 	char *bp, *p;
     99  1.11  christos 	char chgstr[256], expstr[256];
    100   1.1       cgd 
    101   1.1       cgd 	if (!(fp = fdopen(fd, "w")))
    102   1.7   thorpej 		(*Pw_error)(tempname, 1, 1);
    103   1.1       cgd 
    104   1.1       cgd 	(void)fprintf(fp,
    105   1.7   thorpej 	    "#Changing user %sdatabase information for %s.\n",
    106   1.7   thorpej 	    use_yp ? "YP " : "", pw->pw_name);
    107   1.1       cgd 	if (!uid) {
    108   1.1       cgd 		(void)fprintf(fp, "Login: %s\n", pw->pw_name);
    109   1.1       cgd 		(void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
    110   1.1       cgd 		(void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
    111   1.1       cgd 		(void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
    112   1.1       cgd 		(void)fprintf(fp, "Change [month day year]: %s\n",
    113  1.11  christos 		    ttoa(chgstr, sizeof chgstr, pw->pw_change));
    114   1.1       cgd 		(void)fprintf(fp, "Expire [month day year]: %s\n",
    115  1.11  christos 		    ttoa(expstr, sizeof expstr, pw->pw_expire));
    116   1.1       cgd 		(void)fprintf(fp, "Class: %s\n", pw->pw_class);
    117   1.1       cgd 		(void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
    118   1.1       cgd 		(void)fprintf(fp, "Shell: %s\n",
    119   1.1       cgd 		    *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
    120   1.1       cgd 	}
    121   1.1       cgd 	/* Only admin can change "restricted" shells. */
    122   1.1       cgd 	else if (ok_shell(pw->pw_shell))
    123   1.1       cgd 		/*
    124   1.1       cgd 		 * Make shell a restricted field.  Ugly with a
    125   1.1       cgd 		 * necklace, but there's not much else to do.
    126   1.1       cgd 		 */
    127   1.1       cgd 		(void)fprintf(fp, "Shell: %s\n",
    128   1.1       cgd 		    *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
    129   1.1       cgd 	else
    130   1.1       cgd 		list[E_SHELL].restricted = 1;
    131  1.12   mycroft 	bp = strdup(pw->pw_gecos);
    132  1.14    itojun 	if (!bp) {
    133  1.14    itojun 		err(1, "strdup");
    134  1.14    itojun 		/*NOTREACHED*/
    135  1.14    itojun 	}
    136   1.1       cgd 	p = strsep(&bp, ",");
    137   1.1       cgd 	(void)fprintf(fp, "Full Name: %s\n", p ? p : "");
    138   1.1       cgd 	p = strsep(&bp, ",");
    139   1.1       cgd 	(void)fprintf(fp, "Location: %s\n", p ? p : "");
    140   1.1       cgd 	p = strsep(&bp, ",");
    141   1.1       cgd 	(void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
    142   1.1       cgd 	p = strsep(&bp, ",");
    143   1.1       cgd 	(void)fprintf(fp, "Home Phone: %s\n", p ? p : "");
    144   1.1       cgd 
    145   1.1       cgd 	(void)fchown(fd, getuid(), getgid());
    146   1.1       cgd 	(void)fclose(fp);
    147   1.1       cgd }
    148   1.1       cgd 
    149   1.4     glass int
    150   1.6       jtc verify(tempname, pw)
    151   1.6       jtc 	char *tempname;
    152   1.1       cgd 	struct passwd *pw;
    153   1.1       cgd {
    154   1.4     glass 	ENTRY *ep;
    155   1.4     glass 	char *p;
    156   1.4     glass 	struct stat sb;
    157   1.1       cgd 	FILE *fp;
    158  1.15  christos 	int len, fd;
    159   1.3   deraadt 	static char buf[LINE_MAX];
    160   1.1       cgd 
    161  1.15  christos 	if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 ||
    162  1.15  christos 	    (fp = fdopen(fd, "r")) == NULL)
    163   1.7   thorpej 		(*Pw_error)(tempname, 1, 1);
    164  1.15  christos 	if (fstat(fd, &sb))
    165   1.7   thorpej 		(*Pw_error)(tempname, 1, 1);
    166  1.15  christos 	if (sb.st_size == 0 || sb.st_nlink != 1) {
    167   1.4     glass 		warnx("corrupted temporary file");
    168   1.4     glass 		goto bad;
    169   1.4     glass 	}
    170   1.1       cgd 	while (fgets(buf, sizeof(buf), fp)) {
    171   1.1       cgd 		if (!buf[0] || buf[0] == '#')
    172   1.1       cgd 			continue;
    173   1.4     glass 		if (!(p = strchr(buf, '\n'))) {
    174   1.4     glass 			warnx("line too long");
    175   1.1       cgd 			goto bad;
    176   1.1       cgd 		}
    177   1.1       cgd 		*p = '\0';
    178   1.1       cgd 		for (ep = list;; ++ep) {
    179   1.1       cgd 			if (!ep->prompt) {
    180   1.4     glass 				warnx("unrecognized field");
    181   1.1       cgd 				goto bad;
    182   1.1       cgd 			}
    183   1.1       cgd 			if (!strncasecmp(buf, ep->prompt, ep->len)) {
    184   1.1       cgd 				if (ep->restricted && uid) {
    185   1.4     glass 					warnx(
    186   1.4     glass 					    "you may not change the %s field",
    187   1.4     glass 						ep->prompt);
    188   1.1       cgd 					goto bad;
    189   1.1       cgd 				}
    190   1.4     glass 				if (!(p = strchr(buf, ':'))) {
    191   1.4     glass 					warnx("line corrupted");
    192   1.1       cgd 					goto bad;
    193   1.1       cgd 				}
    194  1.17       dsl 				while (isspace((unsigned char)*++p));
    195   1.1       cgd 				if (ep->except && strpbrk(p, ep->except)) {
    196   1.4     glass 					warnx(
    197   1.4     glass 				   "illegal character in the \"%s\" field",
    198   1.1       cgd 					    ep->prompt);
    199   1.1       cgd 					goto bad;
    200   1.1       cgd 				}
    201   1.1       cgd 				if ((ep->func)(p, pw, ep)) {
    202   1.1       cgd bad:					(void)fclose(fp);
    203   1.4     glass 					return (0);
    204   1.1       cgd 				}
    205   1.1       cgd 				break;
    206   1.1       cgd 			}
    207   1.1       cgd 		}
    208   1.1       cgd 	}
    209   1.1       cgd 	(void)fclose(fp);
    210   1.1       cgd 
    211   1.1       cgd 	/* Build the gecos field. */
    212   1.1       cgd 	len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
    213   1.1       cgd 	    strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
    214   1.4     glass 	if (!(p = malloc(len)))
    215   1.9     lukem 		err(1, "malloc");
    216  1.12   mycroft 	(void)snprintf(p, len, "%s,%s,%s,%s", list[E_NAME].save,
    217   1.1       cgd 	    list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);
    218  1.12   mycroft 	pw->pw_gecos = p;
    219   1.1       cgd 
    220   1.1       cgd 	if (snprintf(buf, sizeof(buf),
    221  1.10       mrg 	    "%s:%s:%d:%d:%s:%lu:%lu:%s:%s:%s",
    222   1.1       cgd 	    pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
    223  1.10       mrg 	    (u_long)pw->pw_change, (u_long)pw->pw_expire, pw->pw_gecos,
    224  1.10       mrg 	    pw->pw_dir, pw->pw_shell) >= sizeof(buf)) {
    225   1.4     glass 		warnx("entries too long");
    226   1.4     glass 		return (0);
    227   1.1       cgd 	}
    228   1.5      phil 	return (pw_scan(buf, pw, (int *)NULL));
    229   1.1       cgd }
    230