| 1 | /* |
| 2 | * Copyright (c) 1988 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[] = "@(#)field.c 5.13 (Berkeley) 2/12/91"; |
| 36 | #endif /* not lint */ |
| 37 | |
| 38 | #include <sys/param.h> |
| 39 | #include <pwd.h> |
| 40 | #include <grp.h> |
| 41 | #include <string.h> |
| 42 | #include <stdio.h> |
| 43 | #include <ctype.h> |
| 44 | #include "chpass.h" |
| 45 | #include "pathnames.h" |
| 46 | |
| 47 | /* ARGSUSED */ |
| 48 | p_login(p, pw, ep) |
| 49 | char *p; |
| 50 | struct passwd *pw; |
| 51 | ENTRY *ep; |
| 52 | { |
| 53 | if (!*p) { |
| 54 | (void)fprintf(stderr, "chpass: empty login field.\n"); |
| 55 | return(1); |
| 56 | } |
| 57 | if (*p == '-') { |
| 58 | (void)fprintf(stderr, |
| 59 | "chpass: login names may not begin with a hyphen.\n"); |
| 60 | return(1); |
| 61 | } |
| 62 | if (!(pw->pw_name = strdup(p))) { |
| 63 | (void)fprintf(stderr, "chpass: can't save entry.\n"); |
| 64 | return(1); |
| 65 | } |
| 66 | if (index(p, '.')) |
| 67 | (void)fprintf(stderr, |
| 68 | "chpass: \'.\' is dangerous in a login name.\n"); |
| 69 | for (; *p; ++p) |
| 70 | if (isupper(*p)) { |
| 71 | (void)fprintf(stderr, |
| 72 | "chpass: upper-case letters are dangerous in a login name.\n"); |
| 73 | break; |
| 74 | } |
| 75 | return(0); |
| 76 | } |
| 77 | |
| 78 | /* ARGSUSED */ |
| 79 | p_passwd(p, pw, ep) |
| 80 | char *p; |
| 81 | struct passwd *pw; |
| 82 | ENTRY *ep; |
| 83 | { |
| 84 | if (!*p) |
| 85 | pw->pw_passwd = ""; /* "NOLOGIN"; */ |
| 86 | else if (!(pw->pw_passwd = strdup(p))) { |
| 87 | (void)fprintf(stderr, "chpass: can't save password entry.\n"); |
| 88 | return(1); |
| 89 | } |
| 90 | |
| 91 | return(0); |
| 92 | } |
| 93 | |
| 94 | /* ARGSUSED */ |
| 95 | p_uid(p, pw, ep) |
| 96 | register char *p; |
| 97 | struct passwd *pw; |
| 98 | ENTRY *ep; |
| 99 | { |
| 100 | int id; |
| 101 | |
| 102 | if (!*p) { |
| 103 | (void)fprintf(stderr, "chpass: empty uid field.\n"); |
| 104 | return(1); |
| 105 | } |
| 106 | if (!isdigit(*p)) { |
| 107 | (void)fprintf(stderr, "chpass: illegal uid.\n"); |
| 108 | return(1); |
| 109 | } |
| 110 | id = atoi(p); |
| 111 | if ((u_int)id > USHRT_MAX) { |
| 112 | (void)fprintf(stderr, "chpass: %d > max uid value (%d).\n", |
| 113 | id, USHRT_MAX); |
| 114 | return(1); |
| 115 | } |
| 116 | pw->pw_uid = id; |
| 117 | return(0); |
| 118 | } |
| 119 | |
| 120 | /* ARGSUSED */ |
| 121 | p_gid(p, pw, ep) |
| 122 | register char *p; |
| 123 | struct passwd *pw; |
| 124 | ENTRY *ep; |
| 125 | { |
| 126 | struct group *gr; |
| 127 | int id; |
| 128 | |
| 129 | if (!*p) { |
| 130 | (void)fprintf(stderr, "chpass: empty gid field.\n"); |
| 131 | return(1); |
| 132 | } |
| 133 | if (!isdigit(*p)) { |
| 134 | if (!(gr = getgrnam(p))) { |
| 135 | (void)fprintf(stderr, |
| 136 | "chpass: unknown group %s.\n", p); |
| 137 | return(1); |
| 138 | } |
| 139 | pw->pw_gid = gr->gr_gid; |
| 140 | return(0); |
| 141 | } |
| 142 | id = atoi(p); |
| 143 | if ((u_int)id > USHRT_MAX) { |
| 144 | (void)fprintf(stderr, "chpass: %d > max gid value (%d).\n", |
| 145 | id, USHRT_MAX); |
| 146 | return(1); |
| 147 | } |
| 148 | pw->pw_gid = id; |
| 149 | return(0); |
| 150 | } |
| 151 | |
| 152 | /* ARGSUSED */ |
| 153 | p_class(p, pw, ep) |
| 154 | char *p; |
| 155 | struct passwd *pw; |
| 156 | ENTRY *ep; |
| 157 | { |
| 158 | if (!*p) |
| 159 | pw->pw_class = ""; |
| 160 | else if (!(pw->pw_class = strdup(p))) { |
| 161 | (void)fprintf(stderr, "chpass: can't save entry.\n"); |
| 162 | return(1); |
| 163 | } |
| 164 | |
| 165 | return(0); |
| 166 | } |
| 167 | |
| 168 | /* ARGSUSED */ |
| 169 | p_change(p, pw, ep) |
| 170 | char *p; |
| 171 | struct passwd *pw; |
| 172 | ENTRY *ep; |
| 173 | { |
| 174 | if (!atot(p, &pw->pw_change)) |
| 175 | return(0); |
| 176 | (void)fprintf(stderr, "chpass: illegal date for change field.\n"); |
| 177 | return(1); |
| 178 | } |
| 179 | |
| 180 | /* ARGSUSED */ |
| 181 | p_expire(p, pw, ep) |
| 182 | char *p; |
| 183 | struct passwd *pw; |
| 184 | ENTRY *ep; |
| 185 | { |
| 186 | if (!atot(p, &pw->pw_expire)) |
| 187 | return(0); |
| 188 | (void)fprintf(stderr, "chpass: illegal date for expire field.\n"); |
| 189 | return(1); |
| 190 | } |
| 191 | |
| 192 | /* ARGSUSED */ |
| 193 | p_gecos(p, pw, ep) |
| 194 | char *p; |
| 195 | struct passwd *pw; |
| 196 | ENTRY *ep; |
| 197 | { |
| 198 | if (!*p) |
| 199 | ep->save = ""; |
| 200 | else if (!(ep->save = strdup(p))) { |
| 201 | (void)fprintf(stderr, "chpass: can't save entry.\n"); |
| 202 | return(1); |
| 203 | } |
| 204 | return(0); |
| 205 | } |
| 206 | |
| 207 | /* ARGSUSED */ |
| 208 | p_hdir(p, pw, ep) |
| 209 | char *p; |
| 210 | struct passwd *pw; |
| 211 | ENTRY *ep; |
| 212 | { |
| 213 | if (!*p) { |
| 214 | (void)fprintf(stderr, "chpass: empty home directory field.\n"); |
| 215 | return(1); |
| 216 | } |
| 217 | if (!(pw->pw_dir = strdup(p))) { |
| 218 | (void)fprintf(stderr, "chpass: can't save entry.\n"); |
| 219 | return(1); |
| 220 | } |
| 221 | return(0); |
| 222 | } |
| 223 | |
| 224 | /* ARGSUSED */ |
| 225 | p_shell(p, pw, ep) |
| 226 | register char *p; |
| 227 | struct passwd *pw; |
| 228 | ENTRY *ep; |
| 229 | { |
| 230 | char *t, *ok_shell(); |
| 231 | |
| 232 | if (!*p) { |
| 233 | pw->pw_shell = _PATH_BSHELL; |
| 234 | return(0); |
| 235 | } |
| 236 | /* only admin can change from or to "restricted" shells */ |
| 237 | if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) { |
| 238 | (void)fprintf(stderr, |
| 239 | "chpass: %s: current shell non-standard.\n", pw->pw_shell); |
| 240 | return(1); |
| 241 | } |
| 242 | if (!(t = ok_shell(p))) { |
| 243 | if (uid) { |
| 244 | (void)fprintf(stderr, |
| 245 | "chpass: %s: non-standard shell.\n", p); |
| 246 | return(1); |
| 247 | } |
| 248 | } |
| 249 | else |
| 250 | p = t; |
| 251 | if (!(pw->pw_shell = strdup(p))) { |
| 252 | (void)fprintf(stderr, "chpass: can't save entry.\n"); |
| 253 | return(1); |
| 254 | } |
| 255 | return(0); |
| 256 | } |