pw.c revision 44231
1/*- 2 * Copyright (C) 1996 3 * David L. Nugent. 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 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#ifndef lint 28static const char rcsid[] = 29 "$Id: pw.c,v 1.12 1999/02/23 07:15:10 davidn Exp $"; 30#endif /* not lint */ 31 32#include <err.h> 33#include <fcntl.h> 34#include <paths.h> 35#include <sys/wait.h> 36#include "pw.h" 37 38const char *Modes[] = {"add", "del", "mod", "show", "next", NULL}; 39const char *Which[] = {"user", "group", NULL}; 40static const char *Combo1[] = { 41 "useradd", "userdel", "usermod", "usershow", "usernext", 42 "groupadd", "groupdel", "groupmod", "groupshow", "groupnext", 43 NULL}; 44static const char *Combo2[] = { 45 "adduser", "deluser", "moduser", "showuser", "nextuser", 46 "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup", 47NULL}; 48 49struct pwf PWF = 50{ 51 0, 52 setpwent, 53 endpwent, 54 getpwent, 55 getpwuid, 56 getpwnam, 57 pwdb, 58 setgrent, 59 endgrent, 60 getgrent, 61 getgrgid, 62 getgrnam, 63 grdb 64 65}; 66struct pwf VPWF = 67{ 68 1, 69 vsetpwent, 70 vendpwent, 71 vgetpwent, 72 vgetpwuid, 73 vgetpwnam, 74 vpwdb, 75 vsetgrent, 76 vendgrent, 77 vgetgrent, 78 vgetgrgid, 79 vgetgrnam, 80 vgrdb 81}; 82 83static struct cargs arglist; 84 85static int getindex(const char *words[], const char *word); 86static void cmdhelp(int mode, int which); 87 88 89int 90main(int argc, char *argv[]) 91{ 92 int ch; 93 int mode = -1; 94 int which = -1; 95 char *config = NULL; 96 struct userconf *cnf; 97 98 static const char *opts[W_NUM][M_NUM] = 99 { 100 { /* user */ 101 "V:C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y", 102 "V:C:qn:u:rY", 103 "V:C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY", 104 "V:C:qn:u:FPa", 105 "V:C:q" 106 }, 107 { /* grp */ 108 "V:C:qn:g:h:M:pNPY", 109 "V:C:qn:g:Y", 110 "V:C:qn:g:l:h:FM:m:NPY", 111 "V:C:qn:g:FPa", 112 "V:C:q" 113 } 114 }; 115 116 static int (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) = 117 { /* Request handlers */ 118 pw_user, 119 pw_group 120 }; 121 122 umask(0); /* We wish to handle this manually */ 123 LIST_INIT(&arglist); 124 125 /* 126 * Break off the first couple of words to determine what exactly 127 * we're being asked to do 128 */ 129 while (argc > 1) { 130 int tmp; 131 132 if (*argv[1] == '-') { 133 /* 134 * Special case, allow pw -V<dir> <operation> [args] for scripts etc. 135 */ 136 if (argv[1][1] == 'V') { 137 optarg = &argv[1][2]; 138 if (*optarg == '\0') { 139 optarg = argv[2]; 140 ++argv; 141 --argc; 142 } 143 addarg(&arglist, 'V', optarg); 144 } else 145 break; 146 } 147 else if ((tmp = getindex(Modes, argv[1])) != -1) 148 mode = tmp; 149 else if ((tmp = getindex(Which, argv[1])) != -1) 150 which = tmp; 151 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) { 152 which = tmp / M_NUM; 153 mode = tmp % M_NUM; 154 } else if (strcmp(argv[1], "help") == 0) 155 cmdhelp(mode, which); 156 else if (which != -1 && mode != -1 && arglist.lh_first == NULL) 157 addarg(&arglist, 'n', argv[1]); 158 else 159 errx(EX_USAGE, "unknown keyword `%s'", argv[1]); 160 ++argv; 161 --argc; 162 } 163 164 /* 165 * Bail out unless the user is specific! 166 */ 167 if (mode == -1 || which == -1) 168 cmdhelp(mode, which); 169 170 /* 171 * We know which mode we're in and what we're about to do, so now 172 * let's dispatch the remaining command line args in a genric way. 173 */ 174 optarg = NULL; 175 176 while ((ch = getopt(argc, argv, opts[which][mode])) != -1) { 177 if (ch == '?') 178 errx(EX_USAGE, NULL); 179 else 180 addarg(&arglist, ch, optarg); 181 optarg = NULL; 182 } 183 184 /* 185 * Must be root to attempt an update 186 */ 187 if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL) 188 errx(EX_NOPERM, "you must be root to run this program"); 189 190 /* 191 * We should immediately look for the -q 'quiet' switch so that we 192 * don't bother with extraneous errors 193 */ 194 if (getarg(&arglist, 'q') != NULL) 195 freopen("/dev/null", "w", stderr); 196 197 /* 198 * Set our base working path if not overridden 199 */ 200 201 config = getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL; 202 203 if (getarg(&arglist, 'V') != NULL) { 204 char * etcpath = getarg(&arglist, 'V')->val; 205 if (*etcpath) { 206 if (config == NULL) { /* Only override config location if -C not specified */ 207 config = malloc(MAXPATHLEN); 208 snprintf(config, MAXPATHLEN, "%s/pw.conf", etcpath); 209 } 210 memcpy(&PWF, &VPWF, sizeof PWF); 211 setpwdir(etcpath); 212 setgrdir(etcpath); 213 } 214 } 215 216 /* 217 * Now, let's do the common initialisation 218 */ 219 cnf = read_userconfig(config); 220 221 ch = funcs[which] (cnf, mode, &arglist); 222 223 /* 224 * If everything went ok, and we've been asked to update 225 * the NIS maps, then do it now 226 */ 227 if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) { 228 pid_t pid; 229 230 fflush(NULL); 231 if (chdir(_PATH_YP) == -1) 232 warn("chdir(" _PATH_YP ")"); 233 else if ((pid = fork()) == -1) 234 warn("fork()"); 235 else if (pid == 0) { 236 /* Is make anywhere else? */ 237 execlp("/usr/bin/make", "make", NULL); 238 _exit(1); 239 } else { 240 int i; 241 waitpid(pid, &i, 0); 242 if ((i = WEXITSTATUS(i)) != 0) 243 errx(ch, "make exited with status %d", i); 244 else 245 pw_log(cnf, mode, which, "NIS maps updated"); 246 } 247 } 248 return ch; 249} 250 251 252static int 253getindex(const char *words[], const char *word) 254{ 255 int i = 0; 256 257 while (words[i]) { 258 if (strcmp(words[i], word) == 0) 259 return i; 260 i++; 261 } 262 return -1; 263} 264 265 266/* 267 * This is probably an overkill for a cmdline help system, but it reflects 268 * the complexity of the command line. 269 */ 270 271static void 272cmdhelp(int mode, int which) 273{ 274 if (which == -1) 275 fprintf(stderr, "usage: pw [user|group] [add|del|mod|show|next] [ help | switches/values ]\n"); 276 else if (mode == -1) 277 fprintf(stderr, "usage: pw %s [add|del|mod|show|next] [ help | switches/values ]\n", Which[which]); 278 else { 279 280 /* 281 * We need to give mode specific help 282 */ 283 static const char *help[W_NUM][M_NUM] = 284 { 285 { 286 "usage: pw useradd [name] [switches]\n" 287 "\t-V etcdir alternate /etc location\n" 288 "\t-C config configuration file\n" 289 "\t-q quiet operation\n" 290 " Adding users:\n" 291 "\t-n name login name\n" 292 "\t-u uid user id\n" 293 "\t-c comment user name/comment\n" 294 "\t-d directory home directory\n" 295 "\t-e date account expiry date\n" 296 "\t-p date password expiry date\n" 297 "\t-g grp initial group\n" 298 "\t-G grp1,grp2 additional groups\n" 299 "\t-m [ -k dir ] create and set up home\n" 300 "\t-s shell name of login shell\n" 301 "\t-o duplicate uid ok\n" 302 "\t-L class user class\n" 303 "\t-h fd read password on fd\n" 304 "\t-Y update NIS maps\n" 305 "\t-N no update\n" 306 " Setting defaults:\n" 307 "\t-V etcdir alternate /etc location\n" 308 "\t-D set user defaults\n" 309 "\t-b dir default home root dir\n" 310 "\t-e period default expiry period\n" 311 "\t-p period default password change period\n" 312 "\t-g group default group\n" 313 "\t-G grp1,grp2 additional groups\n" 314 "\t-L class default user class\n" 315 "\t-k dir default home skeleton\n" 316 "\t-u min,max set min,max uids\n" 317 "\t-i min,max set min,max gids\n" 318 "\t-w method set default password method\n" 319 "\t-s shell default shell\n" 320 "\t-y path set NIS passwd file path\n", 321 "usage: pw userdel [uid|name] [switches]\n" 322 "\t-V etcdir alternate /etc location\n" 323 "\t-n name login name\n" 324 "\t-u uid user id\n" 325 "\t-Y update NIS maps\n" 326 "\t-r remove home & contents\n", 327 "usage: pw usermod [uid|name] [switches]\n" 328 "\t-V etcdir alternate /etc location\n" 329 "\t-C config configuration file\n" 330 "\t-q quiet operation\n" 331 "\t-F force add if no user\n" 332 "\t-n name login name\n" 333 "\t-u uid user id\n" 334 "\t-c comment user name/comment\n" 335 "\t-d directory home directory\n" 336 "\t-e date account expiry date\n" 337 "\t-p date password expiry date\n" 338 "\t-g grp initial group\n" 339 "\t-G grp1,grp2 additional groups\n" 340 "\t-l name new login name\n" 341 "\t-L class user class\n" 342 "\t-m [ -k dir ] create and set up home\n" 343 "\t-s shell name of login shell\n" 344 "\t-w method set new password using method\n" 345 "\t-h fd read password on fd\n" 346 "\t-Y update NIS maps\n" 347 "\t-N no update\n", 348 "usage: pw usershow [uid|name] [switches]\n" 349 "\t-V etcdir alternate /etc location\n" 350 "\t-n name login name\n" 351 "\t-u uid user id\n" 352 "\t-F force print\n" 353 "\t-P prettier format\n" 354 "\t-a print all users\n", 355 "usage: pw usernext [switches]\n" 356 "\t-V etcdir alternate /etc location\n" 357 "\t-C config configuration file\n" 358 }, 359 { 360 "usage: pw groupadd [group|gid] [switches]\n" 361 "\t-V etcdir alternate /etc location\n" 362 "\t-C config configuration file\n" 363 "\t-q quiet operation\n" 364 "\t-n group group name\n" 365 "\t-g gid group id\n" 366 "\t-M usr1,usr2 add users as group members\n" 367 "\t-o duplicate gid ok\n" 368 "\t-Y update NIS maps\n" 369 "\t-N no update\n", 370 "usage: pw groupdel [group|gid] [switches]\n" 371 "\t-V etcdir alternate /etc location\n" 372 "\t-n name group name\n" 373 "\t-g gid group id\n" 374 "\t-Y update NIS maps\n", 375 "usage: pw groupmod [group|gid] [switches]\n" 376 "\t-V etcdir alternate /etc location\n" 377 "\t-C config configuration file\n" 378 "\t-q quiet operation\n" 379 "\t-F force add if not exists\n" 380 "\t-n name group name\n" 381 "\t-g gid group id\n" 382 "\t-M usr1,usr2 replaces users as group members\n" 383 "\t-m usr1,usr2 add users as group members\n" 384 "\t-l name new group name\n" 385 "\t-Y update NIS maps\n" 386 "\t-N no update\n", 387 "usage: pw groupshow [group|gid] [switches]\n" 388 "\t-V etcdir alternate /etc location\n" 389 "\t-n name group name\n" 390 "\t-g gid group id\n" 391 "\t-F force print\n" 392 "\t-P prettier format\n" 393 "\t-a print all accounting groups\n", 394 "usage: pw groupnext [switches]\n" 395 "\t-V etcdir alternate /etc location\n" 396 "\t-C config configuration file\n" 397 } 398 }; 399 400 fprintf(stderr, help[which][mode]); 401 } 402 exit(EXIT_FAILURE); 403} 404 405struct carg * 406getarg(struct cargs * _args, int ch) 407{ 408 struct carg *c = _args->lh_first; 409 410 while (c != NULL && c->ch != ch) 411 c = c->list.le_next; 412 return c; 413} 414 415struct carg * 416addarg(struct cargs * _args, int ch, char *argstr) 417{ 418 struct carg *ca = malloc(sizeof(struct carg)); 419 420 if (ca == NULL) 421 errx(EX_OSERR, "out of memory"); 422 ca->ch = ch; 423 ca->val = argstr; 424 LIST_INSERT_HEAD(_args, ca, list); 425 return ca; 426} 427