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 35 static 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 56 extern char *tempname; 57 58 void 59 edit(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 */ 85 void 86 display(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 p = strsep(&bp, ","); 124 (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); 125 p = strsep(&bp, ","); 126 (void)fprintf(fp, "Location: %s\n", p ? p : ""); 127 p = strsep(&bp, ","); 128 (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); 129 p = strsep(&bp, ","); 130 (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); 131 132 (void)fchown(fd, getuid(), getgid()); 133 (void)fclose(fp); 134 } 135 136 int 137 verify(pw) 138 struct passwd *pw; 139 { 140 ENTRY *ep; 141 char *p; 142 struct stat sb; 143 FILE *fp; 144 int len; 145 char buf[LINE_MAX]; 146 147 if (!(fp = fopen(tempname, "r"))) 148 pw_error(tempname, 1, 1); 149 if (fstat(fileno(fp), &sb)) 150 pw_error(tempname, 1, 1); 151 if (sb.st_size == 0) { 152 warnx("corrupted temporary file"); 153 goto bad; 154 } 155 while (fgets(buf, sizeof(buf), fp)) { 156 if (!buf[0] || buf[0] == '#') 157 continue; 158 if (!(p = strchr(buf, '\n'))) { 159 warnx("line too long"); 160 goto bad; 161 } 162 *p = '\0'; 163 for (ep = list;; ++ep) { 164 if (!ep->prompt) { 165 warnx("unrecognized field"); 166 goto bad; 167 } 168 if (!strncasecmp(buf, ep->prompt, ep->len)) { 169 if (ep->restricted && uid) { 170 warnx( 171 "you may not change the %s field", 172 ep->prompt); 173 goto bad; 174 } 175 if (!(p = strchr(buf, ':'))) { 176 warnx("line corrupted"); 177 goto bad; 178 } 179 while (isspace(*++p)); 180 if (ep->except && strpbrk(p, ep->except)) { 181 warnx( 182 "illegal character in the \"%s\" field", 183 ep->prompt); 184 goto bad; 185 } 186 if ((ep->func)(p, pw, ep)) { 187 bad: (void)fclose(fp); 188 return (0); 189 } 190 break; 191 } 192 } 193 } 194 (void)fclose(fp); 195 196 /* Build the gecos field. */ 197 len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + 198 strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4; 199 if (!(p = malloc(len))) 200 err(1, NULL); 201 (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save, 202 list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); 203 204 if (snprintf(buf, sizeof(buf), 205 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", 206 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, 207 pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, 208 pw->pw_shell) >= sizeof(buf)) { 209 warnx("entries too long"); 210 return (0); 211 } 212 return (pw_scan(buf, pw)); 213 } 214