| 1 | /* |
| 2 | * Copyright (c) 1988, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | */ |
| 7 | |
| 8 | #ifndef lint |
| 9 | static char sccsid[] = "@(#)field.c 8.3 (Berkeley) %G%"; |
| 10 | #endif /* not lint */ |
| 11 | |
| 12 | #include <sys/param.h> |
| 13 | |
| 14 | #include <ctype.h> |
| 15 | #include <err.h> |
| 16 | #include <errno.h> |
| 17 | #include <grp.h> |
| 18 | #include <pwd.h> |
| 19 | #include <stdio.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <unistd.h> |
| 23 | |
| 24 | #include "chpass.h" |
| 25 | #include "pathnames.h" |
| 26 | |
| 27 | /* ARGSUSED */ |
| 28 | int |
| 29 | p_login(p, pw, ep) |
| 30 | char *p; |
| 31 | struct passwd *pw; |
| 32 | ENTRY *ep; |
| 33 | { |
| 34 | if (!*p) { |
| 35 | warnx("empty login field"); |
| 36 | return (1); |
| 37 | } |
| 38 | if (*p == '-') { |
| 39 | warnx("login names may not begin with a hyphen"); |
| 40 | return (1); |
| 41 | } |
| 42 | if (!(pw->pw_name = strdup(p))) { |
| 43 | warnx("can't save entry"); |
| 44 | return (1); |
| 45 | } |
| 46 | if (strchr(p, '.')) |
| 47 | warnx("\'.\' is dangerous in a login name"); |
| 48 | for (; *p; ++p) |
| 49 | if (isupper(*p)) { |
| 50 | warnx("upper-case letters are dangerous in a login name"); |
| 51 | break; |
| 52 | } |
| 53 | return (0); |
| 54 | } |
| 55 | |
| 56 | /* ARGSUSED */ |
| 57 | int |
| 58 | p_passwd(p, pw, ep) |
| 59 | char *p; |
| 60 | struct passwd *pw; |
| 61 | ENTRY *ep; |
| 62 | { |
| 63 | if (!*p) |
| 64 | pw->pw_passwd = ""; /* "NOLOGIN"; */ |
| 65 | else if (!(pw->pw_passwd = strdup(p))) { |
| 66 | warnx("can't save password entry"); |
| 67 | return (1); |
| 68 | } |
| 69 | |
| 70 | return (0); |
| 71 | } |
| 72 | |
| 73 | /* ARGSUSED */ |
| 74 | int |
| 75 | p_uid(p, pw, ep) |
| 76 | char *p; |
| 77 | struct passwd *pw; |
| 78 | ENTRY *ep; |
| 79 | { |
| 80 | uid_t id; |
| 81 | char *np; |
| 82 | |
| 83 | if (!*p) { |
| 84 | warnx("empty uid field"); |
| 85 | return (1); |
| 86 | } |
| 87 | if (!isdigit(*p)) { |
| 88 | warnx("illegal uid"); |
| 89 | return (1); |
| 90 | } |
| 91 | errno = 0; |
| 92 | id = strtoul(p, &np, 10); |
| 93 | if (*np || (id == ULONG_MAX && errno == ERANGE)) { |
| 94 | warnx("illegal uid"); |
| 95 | return (1); |
| 96 | } |
| 97 | pw->pw_uid = id; |
| 98 | return (0); |
| 99 | } |
| 100 | |
| 101 | /* ARGSUSED */ |
| 102 | int |
| 103 | p_gid(p, pw, ep) |
| 104 | char *p; |
| 105 | struct passwd *pw; |
| 106 | ENTRY *ep; |
| 107 | { |
| 108 | struct group *gr; |
| 109 | gid_t id; |
| 110 | char *np; |
| 111 | |
| 112 | if (!*p) { |
| 113 | warnx("empty gid field"); |
| 114 | return (1); |
| 115 | } |
| 116 | if (!isdigit(*p)) { |
| 117 | if (!(gr = getgrnam(p))) { |
| 118 | warnx("unknown group %s", p); |
| 119 | return (1); |
| 120 | } |
| 121 | pw->pw_gid = gr->gr_gid; |
| 122 | return (0); |
| 123 | } |
| 124 | errno = 0; |
| 125 | id = strtoul(p, &np, 10); |
| 126 | if (*np || (id == ULONG_MAX && errno == ERANGE)) { |
| 127 | warnx("illegal gid"); |
| 128 | return (1); |
| 129 | } |
| 130 | pw->pw_gid = id; |
| 131 | return (0); |
| 132 | } |
| 133 | |
| 134 | /* ARGSUSED */ |
| 135 | int |
| 136 | p_class(p, pw, ep) |
| 137 | char *p; |
| 138 | struct passwd *pw; |
| 139 | ENTRY *ep; |
| 140 | { |
| 141 | if (!*p) |
| 142 | pw->pw_class = ""; |
| 143 | else if (!(pw->pw_class = strdup(p))) { |
| 144 | warnx("can't save entry"); |
| 145 | return (1); |
| 146 | } |
| 147 | |
| 148 | return (0); |
| 149 | } |
| 150 | |
| 151 | /* ARGSUSED */ |
| 152 | int |
| 153 | p_change(p, pw, ep) |
| 154 | char *p; |
| 155 | struct passwd *pw; |
| 156 | ENTRY *ep; |
| 157 | { |
| 158 | if (!atot(p, &pw->pw_change)) |
| 159 | return (0); |
| 160 | warnx("illegal date for change field"); |
| 161 | return (1); |
| 162 | } |
| 163 | |
| 164 | /* ARGSUSED */ |
| 165 | int |
| 166 | p_expire(p, pw, ep) |
| 167 | char *p; |
| 168 | struct passwd *pw; |
| 169 | ENTRY *ep; |
| 170 | { |
| 171 | if (!atot(p, &pw->pw_expire)) |
| 172 | return (0); |
| 173 | warnx("illegal date for expire field"); |
| 174 | return (1); |
| 175 | } |
| 176 | |
| 177 | /* ARGSUSED */ |
| 178 | int |
| 179 | p_gecos(p, pw, ep) |
| 180 | char *p; |
| 181 | struct passwd *pw; |
| 182 | ENTRY *ep; |
| 183 | { |
| 184 | if (!*p) |
| 185 | ep->save = ""; |
| 186 | else if (!(ep->save = strdup(p))) { |
| 187 | warnx("can't save entry"); |
| 188 | return (1); |
| 189 | } |
| 190 | return (0); |
| 191 | } |
| 192 | |
| 193 | /* ARGSUSED */ |
| 194 | int |
| 195 | p_hdir(p, pw, ep) |
| 196 | char *p; |
| 197 | struct passwd *pw; |
| 198 | ENTRY *ep; |
| 199 | { |
| 200 | if (!*p) { |
| 201 | warnx("empty home directory field"); |
| 202 | return (1); |
| 203 | } |
| 204 | if (!(pw->pw_dir = strdup(p))) { |
| 205 | warnx("can't save entry"); |
| 206 | return (1); |
| 207 | } |
| 208 | return (0); |
| 209 | } |
| 210 | |
| 211 | /* ARGSUSED */ |
| 212 | int |
| 213 | p_shell(p, pw, ep) |
| 214 | char *p; |
| 215 | struct passwd *pw; |
| 216 | ENTRY *ep; |
| 217 | { |
| 218 | char *t, *ok_shell(); |
| 219 | |
| 220 | if (!*p) { |
| 221 | pw->pw_shell = _PATH_BSHELL; |
| 222 | return (0); |
| 223 | } |
| 224 | /* only admin can change from or to "restricted" shells */ |
| 225 | if (uid && pw->pw_shell && !ok_shell(pw->pw_shell)) { |
| 226 | warnx("%s: current shell non-standard", pw->pw_shell); |
| 227 | return (1); |
| 228 | } |
| 229 | if (!(t = ok_shell(p))) { |
| 230 | if (uid) { |
| 231 | warnx("%s: non-standard shell", p); |
| 232 | return (1); |
| 233 | } |
| 234 | } |
| 235 | else |
| 236 | p = t; |
| 237 | if (!(pw->pw_shell = strdup(p))) { |
| 238 | warnx("can't save entry"); |
| 239 | return (1); |
| 240 | } |
| 241 | return (0); |
| 242 | } |