1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * 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 5.2 (Berkeley) 3/3/91"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <pwd.h> 41 #include <errno.h> 42 #include <stdio.h> 43 #include <paths.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include "chpass.h" 47 48 extern char *tempname; 49 50 void 51 edit(pw) 52 struct passwd *pw; 53 { 54 struct stat begin, end; 55 56 for (;;) { 57 if (stat(tempname, &begin)) 58 pw_error(tempname, 1, 1); 59 pw_edit(1); 60 if (stat(tempname, &end)) 61 pw_error(tempname, 1, 1); 62 if (begin.st_mtime == end.st_mtime) { 63 (void)fprintf(stderr, "chpass: no changes made\n"); 64 pw_error((char *)NULL, 0, 0); 65 } 66 if (verify(pw)) 67 break; 68 pw_prompt(); 69 } 70 } 71 72 /* 73 * display -- 74 * print out the file for the user to edit; strange side-effect: 75 * set conditional flag if the user gets to edit the shell. 76 */ 77 display(fd, pw) 78 int fd; 79 struct passwd *pw; 80 { 81 register char *p; 82 FILE *fp; 83 char *bp, *ok_shell(), *ttoa(); 84 85 if (!(fp = fdopen(fd, "w"))) 86 pw_error(tempname, 1, 1); 87 88 (void)fprintf(fp, 89 "#Changing user database information for %s.\n", pw->pw_name); 90 if (!uid) { 91 (void)fprintf(fp, "Login: %s\n", pw->pw_name); 92 (void)fprintf(fp, "Password: %s\n", pw->pw_passwd); 93 (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid); 94 (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid); 95 (void)fprintf(fp, "Change [month day year]: %s\n", 96 ttoa(pw->pw_change)); 97 (void)fprintf(fp, "Expire [month day year]: %s\n", 98 ttoa(pw->pw_expire)); 99 (void)fprintf(fp, "Class: %s\n", pw->pw_class); 100 (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir); 101 (void)fprintf(fp, "Shell: %s\n", 102 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 103 } 104 /* Only admin can change "restricted" shells. */ 105 else if (ok_shell(pw->pw_shell)) 106 /* 107 * Make shell a restricted field. Ugly with a 108 * necklace, but there's not much else to do. 109 */ 110 (void)fprintf(fp, "Shell: %s\n", 111 *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL); 112 else 113 list[E_SHELL].restricted = 1; 114 bp = pw->pw_gecos; 115 p = strsep(&bp, ","); 116 (void)fprintf(fp, "Full Name: %s\n", p ? p : ""); 117 p = strsep(&bp, ","); 118 (void)fprintf(fp, "Location: %s\n", p ? p : ""); 119 p = strsep(&bp, ","); 120 (void)fprintf(fp, "Office Phone: %s\n", p ? p : ""); 121 p = strsep(&bp, ","); 122 (void)fprintf(fp, "Home Phone: %s\n", p ? p : ""); 123 124 (void)fchown(fd, getuid(), getgid()); 125 (void)fclose(fp); 126 } 127 128 verify(pw) 129 struct passwd *pw; 130 { 131 register ENTRY *ep; 132 register char *p; 133 FILE *fp; 134 int len; 135 char buf[LINE_MAX]; 136 137 if (!(fp = fopen(tempname, "r"))) 138 pw_error(tempname, 1, 1); 139 while (fgets(buf, sizeof(buf), fp)) { 140 if (!buf[0] || buf[0] == '#') 141 continue; 142 if (!(p = index(buf, '\n'))) { 143 (void)fprintf(stderr, "chpass: line too long.\n"); 144 goto bad; 145 } 146 *p = '\0'; 147 for (ep = list;; ++ep) { 148 if (!ep->prompt) { 149 (void)fprintf(stderr, 150 "chpass: unrecognized field.\n"); 151 goto bad; 152 } 153 if (!strncasecmp(buf, ep->prompt, ep->len)) { 154 if (ep->restricted && uid) { 155 (void)fprintf(stderr, 156 "chpass: you may not change the %s field.\n", 157 ep->prompt); 158 goto bad; 159 } 160 if (!(p = index(buf, ':'))) { 161 (void)fprintf(stderr, 162 "chpass: line corrupted.\n"); 163 goto bad; 164 } 165 while (isspace(*++p)); 166 if (ep->except && strpbrk(p, ep->except)) { 167 (void)fprintf(stderr, 168 "chpass: illegal character in the \"%s\" field.\n", 169 ep->prompt); 170 goto bad; 171 } 172 if ((ep->func)(p, pw, ep)) { 173 bad: (void)fclose(fp); 174 return(0); 175 } 176 break; 177 } 178 } 179 } 180 (void)fclose(fp); 181 182 /* Build the gecos field. */ 183 len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) + 184 strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4; 185 if (!(p = malloc(len))) { 186 (void)fprintf(stderr, "chpass: %s\n", strerror(errno)); 187 exit(1); 188 } 189 (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save, 190 list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); 191 192 if (snprintf(buf, sizeof(buf), 193 "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s", 194 pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, 195 pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir, 196 pw->pw_shell) >= sizeof(buf)) { 197 (void)fprintf(stderr, "chpass: entries too long\n"); 198 return(0); 199 } 200 return(pw_scan(buf, pw)); 201 } 202