1 /* 2 * Copyright (c) 1988, 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[] = "@(#)field.c 8.4 (Berkeley) 4/2/94"; 36 #endif /* not lint */ 37 38 #include <sys/param.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <grp.h> 44 #include <pwd.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 50 #include "chpass.h" 51 #include "pathnames.h" 52 53 /* ARGSUSED */ 54 int 55 p_login(p, pw, ep) 56 char *p; 57 struct passwd *pw; 58 ENTRY *ep; 59 { 60 if (!*p) { 61 warnx("empty login field"); 62 return (1); 63 } 64 if (*p == '-') { 65 warnx("login names may not begin with a hyphen"); 66 return (1); 67 } 68 if (!(pw->pw_name = strdup(p))) { 69 warnx("can't save entry"); 70 return (1); 71 } 72 if (strchr(p, '.')) 73 warnx("\'.\' is dangerous in a login name"); 74 for (; *p; ++p) 75 if (isupper(*p)) { 76 warnx("upper-case letters are dangerous in a login name"); 77 break; 78 } 79 return (0); 80 } 81 82 /* ARGSUSED */ 83 int 84 p_passwd(p, pw, ep) 85 char *p; 86 struct passwd *pw; 87 ENTRY *ep; 88 { 89 if (!*p) 90 pw->pw_passwd = ""; /* "NOLOGIN"; */ 91 else if (!(pw->pw_passwd = strdup(p))) { 92 warnx("can't save password entry"); 93 return (1); 94 } 95 96 return (0); 97 } 98 99 /* ARGSUSED */ 100 int 101 p_uid(p, pw, ep) 102 char *p; 103 struct passwd *pw; 104 ENTRY *ep; 105 { 106 uid_t id; 107 char *np; 108 109 if (!*p) { 110 warnx("empty uid field"); 111 return (1); 112 } 113 if (!isdigit(*p)) { 114 warnx("illegal uid"); 115 return (1); 116 } 117 errno = 0; 118 id = strtoul(p, &np, 10); 119 if (*np || (id == ULONG_MAX && errno == ERANGE)) { 120 warnx("illegal uid"); 121 return (1); 122 } 123 pw->pw_uid = id; 124 return (0); 125 } 126 127 /* ARGSUSED */ 128 int 129 p_gid(p, pw, ep) 130 char *p; 131 struct passwd *pw; 132 ENTRY *ep; 133 { 134 struct group *gr; 135 gid_t id; 136 char *np; 137 138 if (!*p) { 139 warnx("empty gid field"); 140 return (1); 141 } 142 if (!isdigit(*p)) { 143 if (!(gr = getgrnam(p))) { 144 warnx("unknown group %s", p); 145 return (1); 146 } 147 pw->pw_gid = gr->gr_gid; 148 return (0); 149 } 150 errno = 0; 151 id = strtoul(p, &np, 10); 152 if (*np || (id == ULONG_MAX && errno == ERANGE)) { 153 warnx("illegal gid"); 154 return (1); 155 } 156 pw->pw_gid = id; 157 return (0); 158 } 159 160 /* ARGSUSED */ 161 int 162 p_class(p, pw, ep) 163 char *p; 164 struct passwd *pw; 165 ENTRY *ep; 166 { 167 if (!*p) 168 pw->pw_class = ""; 169 else if (!(pw->pw_class = strdup(p))) { 170 warnx("can't save entry"); 171 return (1); 172 } 173 174 return (0); 175 } 176 177 /* ARGSUSED */ 178 int 179 p_change(p, pw, ep) 180 char *p; 181 struct passwd *pw; 182 ENTRY *ep; 183 { 184 if (!atot(p, &pw->pw_change)) 185 return (0); 186 warnx("illegal date for change field"); 187 return (1); 188 } 189 190 /* ARGSUSED */ 191 int 192 p_expire(p, pw, ep) 193 char *p; 194 struct passwd *pw; 195 ENTRY *ep; 196 { 197 if (!atot(p, &pw->pw_expire)) 198 return (0); 199 warnx("illegal date for expire field"); 200 return (1); 201 } 202 203 /* ARGSUSED */ 204 int 205 p_gecos(p, pw, ep) 206 char *p; 207 struct passwd *pw; 208 ENTRY *ep; 209 { 210 if (!*p) 211 ep->save = ""; 212 else if (!(ep->save = strdup(p))) { 213 warnx("can't save entry"); 214 return (1); 215 } 216 return (0); 217 } 218 219 /* ARGSUSED */ 220 int 221 p_hdir(p, pw, ep) 222 char *p; 223 struct passwd *pw; 224 ENTRY *ep; 225 { 226 if (!*p) { 227 warnx("empty home directory field"); 228 return (1); 229 } 230 if (!(pw->pw_dir = strdup(p))) { 231 warnx("can't save entry"); 232 return (1); 233 } 234 return (0); 235 } 236 237 /* ARGSUSED */ 238 int 239 p_shell(p, pw, ep) 240 char *p; 241 struct passwd *pw; 242 ENTRY *ep; 243 { 244 char *t, *ok_shell(); 245 246 if (!*p) { 247 pw->pw_shell = _PATH_BSHELL; 248 return (0); 249 } 250 /* only admin can change from or to "restricted" shells */ 251 if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) { 252 warnx("%s: current shell non-standard", pw->pw_shell); 253 return (1); 254 } 255 if (!(t = ok_shell(p))) { 256 if (uid) { 257 warnx("%s: non-standard shell", p); 258 return (1); 259 } 260 } 261 else 262 p = t; 263 if (!(pw->pw_shell = strdup(p))) { 264 warnx("can't save entry"); 265 return (1); 266 } 267 return (0); 268 } 269