1 /* $OpenBSD: field.c,v 1.10 2009/03/05 20:53:13 millert Exp $ */ 2 /* $NetBSD: field.c,v 1.3 1995/03/26 04:55:28 glass Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)field.c 8.4 (Berkeley) 4/2/94"; 36 #else 37 static char rcsid[] = "$OpenBSD: field.c,v 1.10 2009/03/05 20:53:13 millert Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <grp.h> 47 #include <paths.h> 48 #include <pwd.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "chpass.h" 55 56 /* ARGSUSED */ 57 int 58 p_login(char *p, struct passwd *pw, 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 /* XXX - what about truncated names? */ 69 if (strcmp(pw->pw_name, p) != 0 && getpwnam(p) != NULL) { 70 warnx("login %s already exists", p); 71 return (1); 72 } 73 if (!(pw->pw_name = strdup(p))) { 74 warnx("can't save entry"); 75 return (1); 76 } 77 if (strchr(p, '.')) 78 warnx("\'.\' is dangerous in a login name"); 79 for (; *p; ++p) 80 if (isupper(*p)) { 81 warnx("upper-case letters are dangerous in a login name"); 82 break; 83 } 84 return (0); 85 } 86 87 /* ARGSUSED */ 88 int 89 p_passwd(char *p, struct passwd *pw, ENTRY *ep) 90 { 91 if (!*p) 92 pw->pw_passwd = ""; /* "NOLOGIN"; */ 93 else if (!(pw->pw_passwd = strdup(p))) { 94 warnx("can't save password entry"); 95 return (1); 96 } 97 98 return (0); 99 } 100 101 /* ARGSUSED */ 102 int 103 p_uid(char *p, struct passwd *pw, ENTRY *ep) 104 { 105 uid_t id; 106 const char *errstr; 107 108 if (!*p) { 109 warnx("empty uid field"); 110 return (1); 111 } 112 id = (uid_t)strtonum(p, 0, UID_MAX, &errstr); 113 if (errstr) { 114 warnx("uid is %s", errstr); 115 return (1); 116 } 117 pw->pw_uid = id; 118 return (0); 119 } 120 121 /* ARGSUSED */ 122 int 123 p_gid(char *p, struct passwd *pw, ENTRY *ep) 124 { 125 struct group *gr; 126 const char *errstr; 127 gid_t id; 128 129 if (!*p) { 130 warnx("empty gid field"); 131 return (1); 132 } 133 if (!isdigit(*p)) { 134 if (!(gr = getgrnam(p))) { 135 warnx("unknown group %s", p); 136 return (1); 137 } 138 pw->pw_gid = gr->gr_gid; 139 return (0); 140 } 141 id = (uid_t)strtonum(p, 0, GID_MAX, &errstr); 142 if (errstr) { 143 warnx("gid is %s", errstr); 144 return (1); 145 } 146 pw->pw_gid = id; 147 return (0); 148 } 149 150 /* ARGSUSED */ 151 int 152 p_class(char *p, struct passwd *pw, ENTRY *ep) 153 { 154 if (!*p) 155 pw->pw_class = ""; 156 else if (!(pw->pw_class = strdup(p))) { 157 warnx("can't save entry"); 158 return (1); 159 } 160 161 return (0); 162 } 163 164 /* ARGSUSED */ 165 int 166 p_change(char *p, struct passwd *pw, ENTRY *ep) 167 { 168 if (!atot(p, &pw->pw_change)) 169 return (0); 170 warnx("illegal date for change field"); 171 return (1); 172 } 173 174 /* ARGSUSED */ 175 int 176 p_expire(char *p, struct passwd *pw, ENTRY *ep) 177 { 178 if (!atot(p, &pw->pw_expire)) 179 return (0); 180 warnx("illegal date for expire field"); 181 return (1); 182 } 183 184 /* ARGSUSED */ 185 int 186 p_gecos(char *p, struct passwd *pw, ENTRY *ep) 187 { 188 if (!*p) 189 ep->save = ""; 190 else if (!(ep->save = strdup(p))) { 191 warnx("can't save entry"); 192 return (1); 193 } 194 return (0); 195 } 196 197 /* ARGSUSED */ 198 int 199 p_hdir(char *p, struct passwd *pw, ENTRY *ep) 200 { 201 if (!*p) { 202 warnx("empty home directory field"); 203 return (1); 204 } 205 if (!(pw->pw_dir = strdup(p))) { 206 warnx("can't save entry"); 207 return (1); 208 } 209 return (0); 210 } 211 212 /* ARGSUSED */ 213 int 214 p_shell(char *p, struct passwd *pw, ENTRY *ep) 215 { 216 char *t; 217 218 if (!*p) { 219 pw->pw_shell = _PATH_BSHELL; 220 return (0); 221 } 222 /* only admin can change from or to "restricted" shells */ 223 if (uid && pw->pw_shell && !ok_shell(pw->pw_shell, NULL)) { 224 warnx("%s: current shell non-standard", pw->pw_shell); 225 return (1); 226 } 227 if (!ok_shell(p, &t)) { 228 if (uid) { 229 warnx("%s: non-standard shell", p); 230 return (1); 231 } 232 } 233 if (!(pw->pw_shell = t)) { 234 warnx("can't save entry"); 235 return (1); 236 } 237 return (0); 238 } 239