edit.c revision 7220
1/*- 2 * Copyright (c) 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; 36#endif /* not lint */ 37 38#include <sys/param.h> 39#include <sys/stat.h> 40 41#include <ctype.h> 42#include <err.h> 43#include <errno.h> 44#include <paths.h> 45#include <pwd.h> 46#include <stdio.h> 47#include <stdlib.h> 48#include <string.h> 49#include <unistd.h> 50 51#include <pw_scan.h> 52#include <pw_util.h> 53 54#include "chpass.h" 55 56extern char *tempname; 57 58void 59edit(pw) 60 struct passwd *pw; 61{ 62 struct stat begin, end; 63 64 for (;;) { 65 if (stat(tempname, &begin)) 66 pw_error(tempname, 1, 1); 67 pw_edit(1); 68 if (stat(tempname, &end)) 69 pw_error(tempname, 1, 1); 70 if (begin.st_mtime == end.st_mtime) { 71 warnx("no changes made"); 72 pw_error(NULL, 0, 0); 73 } 74 if (verify(pw)) 75 break; 76 pw_prompt(); 77 } 78} 79 80/* 81 * display -- 82 * print out the file for the user to edit; strange side-effect: 83 * set conditional flag if the user gets to edit the shell. 84 */ 85void 86display(fd, pw) 87 int fd; 88 struct passwd *pw; 89{ 90 FILE *fp; 91 char *bp, *p, *ttoa(); 92 93 if (!(fp = fdopen(fd, "w"))) 94 pw_error(tempname, 1, 1); 95 96 (void)fprintf(fp, 97 "#Changing user database information for %s.\n", pw->pw_name); 98 if (!uid) { 99 (void)fprintf(fp, "Login: %s\n", pw->pw_name); 100 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); 101 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); 102 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid); 103 (void)fprintf(fp, "Change [month day year]: %s\n", 104 ttoa(pw->pw_change)); 105 (void)fprintf(fp, "Expire [month day year]: %s\n", 106 ttoa(pw->pw_expire)); 107 (void)fprintf(fp, "Class: %s\n", pw->pw_class); 108 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); 109 (void)fprintf(fp, "Shell: %s\n", 110 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 111 } 112 /* Only admin can change "restricted" shells. */ 113 else if (ok_shell(pw->pw_shell)) 114 /* 115 * Make shell a restricted field. Ugly with a 116 * necklace, but there's not much else to do. 117 */ 118 (void)fprintf(fp, "Shell: %s\n", 119 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 120 else 121 list[E_SHELL].restricted = 1; 122 bp = pw->pw_gecos; 123 124 p = strsep(&bp, ","); 125 if (p) 126 list[E_NAME].save = strdup(p); 127 if (!list[E_NAME].restricted || !uid) 128 (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); 129 130 p = strsep(&bp, ","); 131 if (p) 132 list[E_LOCATE].save = strdup(p); 133 if (!list[E_LOCATE].restricted || !uid) 134 (void)fprintf(fp, "Location: %s\n", p ? p : ""); 135 136 p = strsep(&bp, ","); 137 if (p) 138 list[E_BPHONE].save = strdup(p); 139 if (!list[E_BPHONE].restricted || !uid) 140 (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); 141 142 p = strsep(&bp, ","); 143 if (p) 144 list[E_HPHONE].save = strdup(p); 145 if (!list[E_HPHONE].restricted || !uid) 146 (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); 147 148 (void)fchown(fd, getuid(), getgid()); 149 (void)fclose(fp); 150} 151 152int 153verify(pw) 154 struct passwd *pw; 155{ 156 ENTRY *ep; 157 char *p; 158 struct stat sb; 159 FILE *fp; 160 int len; 161 char buf[LINE_MAX]; 162 163 if (!(fp = fopen(tempname, "r"))) 164 pw_error(tempname, 1, 1); 165 if (fstat(fileno(fp), &sb)) 166 pw_error(tempname, 1, 1); 167 if (sb.st_size == 0) { 168 warnx("corrupted temporary file"); 169 goto bad; 170 } 171 while (fgets(buf, sizeof(buf), fp)) { 172 if (!buf[0] || buf[0] == '#') 173 continue; 174 if (!(p = strchr(buf, '\n'))) { 175 warnx("line too long"); 176 goto bad; 177 } 178 *p = '\0'; 179 for (ep = list;; ++ep) { 180 if (!ep->prompt) { 181 warnx("unrecognized field"); 182 goto bad; 183 } 184 if (!strncasecmp(buf, ep->prompt, ep->len)) { 185 if (ep->restricted && uid) { 186 warnx( 187 "you may not change the %s field", 188 ep->prompt); 189 goto bad; 190 } 191 if (!(p = strchr(buf, ':'))) { 192 warnx("line corrupted"); 193 goto bad; 194 } 195 while (isspace(*++p)); 196 if (ep->except && strpbrk(p, ep->except)) { 197 warnx( 198 "illegal character in the \"%s\" field", 199 ep->prompt); 200 goto bad; 201 } 202 if ((ep->func)(p, pw, ep)) { 203bad: (void)fclose(fp); 204 return (0); 205 } 206 break; 207 } 208 } 209 } 210 (void)fclose(fp); 211 212 /* Build the gecos field. */ 213 len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + 214 strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4; 215 if (!(p = malloc(len))) 216 err(1, NULL); 217 (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save, 218 list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); 219 220 if (snprintf(buf, sizeof(buf), 221 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", 222 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, 223 pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, 224 pw->pw_shell) >= sizeof(buf)) { 225 warnx("entries too long"); 226 return (0); 227 } 228 return (pw_scan(buf, pw)); 229} 230