pw.c revision 20267
1/*- 2 * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>. 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 as 10 * the first lines of this file unmodified. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by David L. Nugent. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``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 DAVID L. NUGENT 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 * $Id$ 33 */ 34 35#include "pw.h" 36 37static char *progname = "pw"; 38 39const char *Modes[] = {"add", "del", "mod", "show", "next", NULL}; 40const char *Which[] = {"user", "group", NULL}; 41static const char *Combo1[] = { 42 "useradd", "userdel", "usermod", "usershow", "usernext", 43 "groupadd", "groupdel", "groupmod", "groupshow", "groupnext", 44 NULL}; 45static const char *Combo2[] = { 46 "adduser", "deluser", "moduser", "showuser", "nextuser", 47 "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup", 48NULL}; 49 50static struct cargs arglist; 51 52static int getindex(const char *words[], const char *word); 53static void cmdhelp(int mode, int which); 54 55 56int 57main(int argc, char *argv[]) 58{ 59 int ch; 60 int mode = -1; 61 int which = -1; 62 struct userconf *cnf; 63 64 static const char *opts[W_NUM][M_NUM] = 65 { 66 { /* user */ 67 "C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NP", 68 "C:qn:u:r", 69 "C:qn:u:c:d:e:p:g:G:mk:s:w:L:h:FNP", 70 "C:qn:u:FPa", 71 "C:q" 72 }, 73 { /* grp */ 74 "C:qn:g:h:M:pNP", 75 "C:qn:g:", 76 "C:qn:g:l:h:FM:m:NP", 77 "C:qn:g:FPa", 78 "C:q" 79 } 80 }; 81 82 static int (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) = 83 { /* Request handlers */ 84 pw_user, 85 pw_group 86 }; 87 88 umask(0); /* We wish to handle this manually */ 89 progname = strrchr(argv[0], '/'); 90 if (progname != NULL) 91 ++progname; 92 else 93 progname = argv[0]; 94 95 LIST_INIT(&arglist); 96 97 /* 98 * Break off the first couple of words to determine what exactly 99 * we're being asked to do 100 */ 101 while (argc > 1 && *argv[1] != '-') { 102 int tmp; 103 104 if ((tmp = getindex(Modes, argv[1])) != -1) 105 mode = tmp; 106 else if ((tmp = getindex(Which, argv[1])) != -1) 107 which = tmp; 108 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) { 109 which = tmp / M_NUM; 110 mode = tmp % M_NUM; 111 } else if (strcmp(argv[1], "help") == 0) 112 cmdhelp(mode, which); 113 else if (which != -1 && mode != -1 && arglist.lh_first == NULL) 114 addarg(&arglist, 'n', argv[1]); 115 else 116 cmderr(EX_USAGE, "Unknown keyword `%s'\n", argv[1]); 117 ++argv; 118 --argc; 119 } 120 121 /* 122 * Bail out unless the user is specific! 123 */ 124 if (mode == -1 || which == -1) 125 cmdhelp(mode, which); 126 127 /* 128 * We know which mode we're in and what we're about to do, so now 129 * let's dispatch the remaining command line args in a genric way. 130 */ 131 argv[0] = progname; /* Preserve this */ 132 optarg = NULL; 133 134 while ((ch = getopt(argc, argv, opts[which][mode])) != -1) { 135 if (ch == '?') 136 cmderr(EX_USAGE, NULL); 137 else 138 addarg(&arglist, ch, optarg); 139 optarg = NULL; 140 } 141 142 /* 143 * Must be root to attempt an update 144 */ 145 if (getuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL) 146 cmderr(EX_NOPERM, "you must be root to run this program\n"); 147 148 /* 149 * We should immediately look for the -q 'quiet' switch so that we 150 * don't bother with extraneous errors 151 */ 152 if (getarg(&arglist, 'q') != NULL) 153 freopen("/dev/null", "w", stderr); 154 155 /* 156 * Now, let's do the common initialisation 157 */ 158 cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL); 159 return funcs[which] (cnf, mode, &arglist); 160} 161 162static int 163getindex(const char *words[], const char *word) 164{ 165 int i = 0; 166 167 while (words[i]) { 168 if (strcmp(words[i], word) == 0) 169 return i; 170 i++; 171 } 172 return -1; 173} 174 175 176/* 177 * This is probably an overkill for a cmdline help system, but it reflects 178 * the complexity of the command line. 179 */ 180 181static void 182banner(void) 183{ 184 fprintf(stderr, "%s: ", progname); 185} 186 187void 188cmderr(int ec, char const * fmt,...) 189{ 190 if (fmt != NULL) { 191 va_list argp; 192 193 banner(); 194 va_start(argp, fmt); 195 vfprintf(stderr, fmt, argp); 196 va_end(argp); 197 } 198 exit(ec); 199} 200 201static void 202cmdhelp(int mode, int which) 203{ 204 banner(); 205 if (which == -1) 206 fprintf(stderr, "usage: %s [user|group] [add|del|mod|show|next] [ help | switches/values ]\n", progname); 207 else if (mode == -1) 208 fprintf(stderr, "usage: %s %s [add|del|mod|show|next] [ help | switches/values ]\n", progname, Which[which]); 209 else { 210 211 /* 212 * We need to give mode specific help 213 */ 214 static const char *help[W_NUM][M_NUM] = 215 { 216 { 217 "usage: %s useradd [name] [switches]\n" 218 "\t-C config configuration file\n" 219 "\t-q quiet operation\n" 220 " Adding users:\n" 221 "\t-n name login name\n" 222 "\t-u uid user id\n" 223 "\t-c comment user name/comment\n" 224 "\t-d directory home directory\n" 225 "\t-e date account expiry date\n" 226 "\t-p date password expiry date\n" 227 "\t-g grp initial group\n" 228 "\t-G grp1,grp2 additional groups\n" 229 "\t-m [ -k dir ] create and set up home\n" 230 "\t-s shell name of login shell\n" 231 "\t-o duplicate uid ok\n" 232 "\t-L class user class\n" 233 "\t-h fd read password on fd\n" 234 "\t-N no update\n" 235 " Setting defaults:\n" 236 "\t-D set user defaults\n" 237 "\t-b dir default home root dir\n" 238 "\t-e period default expiry period\n" 239 "\t-p period default password change period\n" 240 "\t-g group default group\n" 241 "\t-G grp1,grp2 additional groups\n" 242 "\t-L class default user class\n" 243 "\t-k dir default home skeleton\n" 244 "\t-u min,max set min,max uids\n" 245 "\t-i min,max set min,max gids\n" 246 "\t-w method set default password method\n" 247 "\t-s shell default shell\n", 248 "usage: %s userdel [uid|name] [switches]\n" 249 "\t-n name login name\n" 250 "\t-u uid user id\n" 251 "\t-r remove home & contents\n", 252 "usage: %s usermod [uid|name] [switches]\n" 253 "\t-C config configuration file\n" 254 "\t-q quiet operation\n" 255 "\t-F force add if no user\n" 256 "\t-n name login name\n" 257 "\t-u uid user id\n" 258 "\t-c comment user name/comment\n" 259 "\t-d directory home directory\n" 260 "\t-e date account expiry date\n" 261 "\t-p date password expiry date\n" 262 "\t-g grp initial group\n" 263 "\t-G grp1,grp2 additional groups\n" 264 "\t-l name new login name\n" 265 "\t-L class user class\n" 266 "\t-m [ -k dir ] create and set up home\n" 267 "\t-s shell name of login shell\n" 268 "\t-w method set new password using method\n" 269 "\t-h fd read password on fd\n" 270 "\t-N no update\n", 271 "usage: %s usershow [uid|name] [switches]\n" 272 "\t-n name login name\n" 273 "\t-u uid user id\n" 274 "\t-F force print\n" 275 "\t-P prettier format\n" 276 "\t-a print all users\n", 277 "usage: %s usernext [switches]\n" 278 "\t-C config configuration file\n" 279 }, 280 { 281 "usage: %s groupadd [group|gid] [switches]\n" 282 "\t-C config configuration file\n" 283 "\t-q quiet operation\n" 284 "\t-n group group name\n" 285 "\t-g gid group id\n" 286 "\t-M usr1,usr2 add users as group members\n" 287 "\t-o duplicate gid ok\n" 288 "\t-N no update\n", 289 "usage: %s groupdel [group|gid] [switches]\n" 290 "\t-n name group name\n" 291 "\t-g gid group id\n", 292 "usage: %s groupmod [group|gid] [switches]\n" 293 "\t-C config configuration file\n" 294 "\t-q quiet operation\n" 295 "\t-F force add if not exists\n" 296 "\t-n name group name\n" 297 "\t-g gid group id\n" 298 "\t-M usr1,usr2 replaces users as group members\n" 299 "\t-m usr1,usr2 add users as group members\n" 300 "\t-l name new group name\n" 301 "\t-N no update\n", 302 "usage: %s groupshow [group|gid] [switches]\n" 303 "\t-n name group name\n" 304 "\t-g gid group id\n" 305 "\t-F force print\n" 306 "\t-P prettier format\n" 307 "\t-a print all accounting groups\n", 308 "usage: %s groupnext [switches]\n" 309 "\t-C config configuration file\n" 310 } 311 }; 312 313 fprintf(stderr, help[which][mode], progname); 314 } 315 exit(EXIT_FAILURE); 316} 317 318struct carg * 319getarg(struct cargs * _args, int ch) 320{ 321 struct carg *c = _args->lh_first; 322 323 while (c != NULL && c->ch != ch) 324 c = c->list.le_next; 325 return c; 326} 327 328struct carg * 329addarg(struct cargs * _args, int ch, char *argstr) 330{ 331 struct carg *ca = malloc(sizeof(struct carg)); 332 333 if (ca == NULL) 334 cmderr(EX_OSERR, "Abort - out of memory\n"); 335 ca->ch = ch; 336 ca->val = argstr; 337 LIST_INSERT_HEAD(_args, ca, list); 338 return ca; 339} 340