pw/pw.c

   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
  28 static const char rcsid[] =
  29   "$FreeBSD$";
  30 #endif /* not lint */
  31
  32 #include <err.h>
  33 #include <fcntl.h>
  34 #include <locale.h>
  35 #include <paths.h>
  36 #include <stdbool.h>
  37 #include <sys/wait.h>
  38 #include "pw.h"
  39
  40 #if !defined(_PATH_YP)
  41 #define _PATH_YP        "/var/yp/"
  42 #endif
  43 const char     *Modes[] = {
  44   "add", "del", "mod", "show", "next",
  45   NULL};
  46 const char     *Which[] = {"user", "group", NULL};
  47 static const char *Combo1[] = {
  48   "useradd", "userdel", "usermod", "usershow", "usernext",
  49   "lock", "unlock",
  50   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  51   NULL};
  52 static const char *Combo2[] = {
  53   "adduser", "deluser", "moduser", "showuser", "nextuser",
  54   "lock", "unlock",
  55   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  56   NULL};
  57
  58 struct pwf PWF =
  59 {
  60         PWF_REGULAR,
  61         setpwent,
  62         endpwent,
  63         getpwent,
  64         getpwuid,
  65         getpwnam,
  66         setgrent,
  67         endgrent,
  68         getgrent,
  69         getgrgid,
  70         getgrnam,
  71
  72 };
  73 struct pwf VPWF =
  74 {
  75         PWF_ALT,
  76         vsetpwent,
  77         vendpwent,
  78         vgetpwent,
  79         vgetpwuid,
  80         vgetpwnam,
  81         vsetgrent,
  82         vendgrent,
  83         vgetgrent,
  84         vgetgrgid,
  85         vgetgrnam,
  86 };
  87
  88 struct pwconf conf;
  89
  90 static struct cargs arglist;
  91
  92 static int      getindex(const char *words[], const char *word);
  93 static void     cmdhelp(int mode, int which);
  94
  95
  96 int
  97 main(int argc, char *argv[])
  98 {
  99         int             ch;
 100         int             mode = -1;
 101         int             which = -1;
 102         char            *config = NULL;
 103         struct stat     st;
 104         char            arg;
 105         bool            relocated, nis;
 106
 107         static const char *opts[W_NUM][M_NUM] =
 108         {
 109                 { /* user */
 110                         "R:V:C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y",
 111                         "R:V:C:qn:u:rY",
 112                         "R:V:C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:FNPY",
 113                         "R:V:C:qn:u:FPa7",
 114                         "R:V:C:q",
 115                         "R:V:C:q",
 116                         "R:V:C:q"
 117                 },
 118                 { /* grp  */
 119                         "R:V:C:qn:g:h:H:M:opNPY",
 120                         "R:V:C:qn:g:Y",
 121                         "R:V:C:qn:d:g:l:h:H:FM:m:NPY",
 122                         "R:V:C:qn:g:FPa",
 123                         "R:V:C:q"
 124                  }
 125         };
 126
 127         static int      (*funcs[W_NUM]) (int _mode, struct cargs * _args) =
 128         {                       /* Request handlers */
 129                 pw_user,
 130                 pw_group
 131         };
 132
 133         relocated = nis = false;
 134         conf.rootdir[0] = '\0';
 135         conf.dryrun = false;
 136         strlcpy(conf.etcpath, _PATH_PWD, sizeof(conf.etcpath));
 137
 138         LIST_INIT(&arglist);
 139
 140         (void)setlocale(LC_ALL, "");
 141
 142         /*
 143          * Break off the first couple of words to determine what exactly
 144          * we're being asked to do
 145          */
 146         while (argc > 1) {
 147                 int             tmp;
 148
 149                 if (*argv[1] == '-') {
 150                         /*
 151                          * Special case, allow pw -V<dir> <operation> [args] for scripts etc.
 152                          */
 153                         arg = argv[1][1];
 154                         if (arg == 'V' || arg == 'R') {
 155                                 if (relocated)
 156                                         errx(EXIT_FAILURE, "Both '-R' and '-V' "
 157                                             "specified, only one accepted");
 158                                 relocated = true;
 159                                 optarg = &argv[1][2];
 160                                 if (*optarg == '\0') {
 161                                         if (stat(argv[2], &st) != 0)
 162                                                 errx(EX_OSFILE, \
 163                                                     "no such directory `%s'",
 164                                                     argv[2]);
 165                                         if (!S_ISDIR(st.st_mode))
 166                                                 errx(EX_OSFILE, "`%s' not a "
 167                                                     "directory", argv[2]);
 168                                         optarg = argv[2];
 169                                         ++argv;
 170                                         --argc;
 171                                 }
 172                                 memcpy(&PWF, &VPWF, sizeof PWF);
 173                                 if (arg == 'R') {
 174                                         strlcpy(conf.rootdir, optarg,
 175                                             sizeof(conf.rootdir));
 176                                         PWF._altdir = PWF_ROOTDIR;
 177                                 }
 178                                 snprintf(conf.etcpath, sizeof(conf.etcpath),
 179                                     "%s%s", optarg, arg == 'R' ? "/etc" : "");
 180                         } else
 181                                 break;
 182                 }
 183                 else if (mode == -1 && (tmp = getindex(Modes, argv[1])) != -1)
 184                         mode = tmp;
 185                 else if (which == -1 && (tmp = getindex(Which, argv[1])) != -1)
 186                         which = tmp;
 187                 else if ((mode == -1 && which == -1) &&
 188                          ((tmp = getindex(Combo1, argv[1])) != -1 ||
 189                           (tmp = getindex(Combo2, argv[1])) != -1)) {
 190                         which = tmp / M_NUM;
 191                         mode = tmp % M_NUM;
 192                 } else if (strcmp(argv[1], "help") == 0 && argv[2] == NULL)
 193                         cmdhelp(mode, which);
 194                 else if (which != -1 && mode != -1)
 195                         addarg(&arglist, 'n', argv[1]);
 196                 else
 197                         errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
 198                 ++argv;
 199                 --argc;
 200         }
 201
 202         /*
 203          * Bail out unless the user is specific!
 204          */
 205         if (mode == -1 || which == -1)
 206                 cmdhelp(mode, which);
 207
 208         /*
 209          * We know which mode we're in and what we're about to do, so now
 210          * let's dispatch the remaining command line args in a genric way.
 211          */
 212         optarg = NULL;
 213
 214         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 215                 switch (ch) {
 216                 case '?':
 217                         errx(EX_USAGE, "unknown switch");
 218                         break;
 219                 case 'C':
 220                         config = optarg;
 221                         break;
 222                 case 'N':
 223                         conf.dryrun = true;
 224                         break;
 225                 case 'Y':
 226                         nis = true;
 227                         break;
 228                 default:
 229                         addarg(&arglist, ch, optarg);
 230                         break;
 231                 }
 232                 optarg = NULL;
 233         }
 234
 235         /*
 236          * Must be root to attempt an update
 237          */
 238         if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && !conf.dryrun)
 239                 errx(EX_NOPERM, "you must be root to run this program");
 240
 241         /*
 242          * We should immediately look for the -q 'quiet' switch so that we
 243          * don't bother with extraneous errors
 244          */
 245         if (getarg(&arglist, 'q') != NULL)
 246                 freopen(_PATH_DEVNULL, "w", stderr);
 247
 248         /*
 249          * Set our base working path if not overridden
 250          */
 251
 252         if (config == NULL) {   /* Only override config location if -C not specified */
 253                 asprintf(&config, "%s/pw.conf", conf.etcpath);
 254                 if (config == NULL)
 255                         errx(EX_OSERR, "out of memory");
 256         }
 257
 258         /*
 259          * Now, let's do the common initialisation
 260          */
 261         conf.userconf = read_userconfig(config);
 262
 263         ch = funcs[which] (mode, &arglist);
 264
 265         /*
 266          * If everything went ok, and we've been asked to update
 267          * the NIS maps, then do it now
 268          */
 269         if (ch == EXIT_SUCCESS && nis) {
 270                 pid_t   pid;
 271
 272                 fflush(NULL);
 273                 if (chdir(_PATH_YP) == -1)
 274                         warn("chdir(" _PATH_YP ")");
 275                 else if ((pid = fork()) == -1)
 276                         warn("fork()");
 277                 else if (pid == 0) {
 278                         /* Is make anywhere else? */
 279                         execlp("/usr/bin/make", "make", (char *)NULL);
 280                         _exit(1);
 281                 } else {
 282                         int   i;
 283                         waitpid(pid, &i, 0);
 284                         if ((i = WEXITSTATUS(i)) != 0)
 285                                 errx(ch, "make exited with status %d", i);
 286                         else
 287                                 pw_log(conf.userconf, mode, which, "NIS maps updated");
 288                 }
 289         }
 290         return ch;
 291 }
 292
 293
 294 static int
 295 getindex(const char *words[], const char *word)
 296 {
 297         int             i = 0;
 298
 299         while (words[i]) {
 300                 if (strcmp(words[i], word) == 0)
 301                         return i;
 302                 i++;
 303         }
 304         return -1;
 305 }
 306
 307
 308 /*
 309  * This is probably an overkill for a cmdline help system, but it reflects
 310  * the complexity of the command line.
 311  */
 312
 313 static void
 314 cmdhelp(int mode, int which)
 315 {
 316         if (which == -1)
 317                 fprintf(stderr, "usage:\n  pw [user|group|lock|unlock] [add|del|mod|show|next] [help|switches/values]\n");
 318         else if (mode == -1)
 319                 fprintf(stderr, "usage:\n  pw %s [add|del|mod|show|next] [help|switches/values]\n", Which[which]);
 320         else {
 321
 322                 /*
 323                  * We need to give mode specific help
 324                  */
 325                 static const char *help[W_NUM][M_NUM] =
 326                 {
 327                         {
 328                                 "usage: pw useradd [name] [switches]\n"
 329                                 "\t-V etcdir      alternate /etc location\n"
 330                                 "\t-R rootir      alternate root directory\n"
 331                                 "\t-C config      configuration file\n"
 332                                 "\t-q             quiet operation\n"
 333                                 "  Adding users:\n"
 334                                 "\t-n name        login name\n"
 335                                 "\t-u uid         user id\n"
 336                                 "\t-c comment     user name/comment\n"
 337                                 "\t-d directory   home directory\n"
 338                                 "\t-e date        account expiry date\n"
 339                                 "\t-p date        password expiry date\n"
 340                                 "\t-g grp         initial group\n"
 341                                 "\t-G grp1,grp2   additional groups\n"
 342                                 "\t-m [ -k dir ]  create and set up home\n"
 343                                 "\t-M mode        home directory permissions\n"
 344                                 "\t-s shell       name of login shell\n"
 345                                 "\t-o             duplicate uid ok\n"
 346                                 "\t-L class       user class\n"
 347                                 "\t-h fd          read password on fd\n"
 348                                 "\t-H fd          read encrypted password on fd\n"
 349                                 "\t-Y             update NIS maps\n"
 350                                 "\t-N             no update\n"
 351                                 "  Setting defaults:\n"
 352                                 "\t-V etcdir      alternate /etc location\n"
 353                                 "\t-R rootir      alternate root directory\n"
 354                                 "\t-D             set user defaults\n"
 355                                 "\t-b dir         default home root dir\n"
 356                                 "\t-e period      default expiry period\n"
 357                                 "\t-p period      default password change period\n"
 358                                 "\t-g group       default group\n"
 359                                 "\t-G grp1,grp2   additional groups\n"
 360                                 "\t-L class       default user class\n"
 361                                 "\t-k dir         default home skeleton\n"
 362                                 "\t-M mode        home directory permissions\n"
 363                                 "\t-u min,max     set min,max uids\n"
 364                                 "\t-i min,max     set min,max gids\n"
 365                                 "\t-w method      set default password method\n"
 366                                 "\t-s shell       default shell\n"
 367                                 "\t-y path        set NIS passwd file path\n",
 368                                 "usage: pw userdel [uid|name] [switches]\n"
 369                                 "\t-V etcdir      alternate /etc location\n"
 370                                 "\t-R rootir      alternate root directory\n"
 371                                 "\t-n name        login name\n"
 372                                 "\t-u uid         user id\n"
 373                                 "\t-Y             update NIS maps\n"
 374                                 "\t-r             remove home & contents\n",
 375                                 "usage: pw usermod [uid|name] [switches]\n"
 376                                 "\t-V etcdir      alternate /etc location\n"
 377                                 "\t-R rootir      alternate root directory\n"
 378                                 "\t-C config      configuration file\n"
 379                                 "\t-q             quiet operation\n"
 380                                 "\t-F             force add if no user\n"
 381                                 "\t-n name        login name\n"
 382                                 "\t-u uid         user id\n"
 383                                 "\t-c comment     user name/comment\n"
 384                                 "\t-d directory   home directory\n"
 385                                 "\t-e date        account expiry date\n"
 386                                 "\t-p date        password expiry date\n"
 387                                 "\t-g grp         initial group\n"
 388                                 "\t-G grp1,grp2   additional groups\n"
 389                                 "\t-l name        new login name\n"
 390                                 "\t-L class       user class\n"
 391                                 "\t-m [ -k dir ]  create and set up home\n"
 392                                 "\t-M mode        home directory permissions\n"
 393                                 "\t-s shell       name of login shell\n"
 394                                 "\t-w method      set new password using method\n"
 395                                 "\t-h fd          read password on fd\n"
 396                                 "\t-H fd          read encrypted password on fd\n"
 397                                 "\t-Y             update NIS maps\n"
 398                                 "\t-N             no update\n",
 399                                 "usage: pw usershow [uid|name] [switches]\n"
 400                                 "\t-V etcdir      alternate /etc location\n"
 401                                 "\t-R rootir      alternate root directory\n"
 402                                 "\t-n name        login name\n"
 403                                 "\t-u uid         user id\n"
 404                                 "\t-F             force print\n"
 405                                 "\t-P             prettier format\n"
 406                                 "\t-a             print all users\n"
 407                                 "\t-7             print in v7 format\n",
 408                                 "usage: pw usernext [switches]\n"
 409                                 "\t-V etcdir      alternate /etc location\n"
 410                                 "\t-R rootir      alternate root directory\n"
 411                                 "\t-C config      configuration file\n"
 412                                 "\t-q             quiet operation\n",
 413                                 "usage pw: lock [switches]\n"
 414                                 "\t-V etcdir      alternate /etc locations\n"
 415                                 "\t-C config      configuration file\n"
 416                                 "\t-q             quiet operation\n",
 417                                 "usage pw: unlock [switches]\n"
 418                                 "\t-V etcdir      alternate /etc locations\n"
 419                                 "\t-C config      configuration file\n"
 420                                 "\t-q             quiet operation\n"
 421                         },
 422                         {
 423                                 "usage: pw groupadd [group|gid] [switches]\n"
 424                                 "\t-V etcdir      alternate /etc location\n"
 425                                 "\t-R rootir      alternate root directory\n"
 426                                 "\t-C config      configuration file\n"
 427                                 "\t-q             quiet operation\n"
 428                                 "\t-n group       group name\n"
 429                                 "\t-g gid         group id\n"
 430                                 "\t-M usr1,usr2   add users as group members\n"
 431                                 "\t-o             duplicate gid ok\n"
 432                                 "\t-Y             update NIS maps\n"
 433                                 "\t-N             no update\n",
 434                                 "usage: pw groupdel [group|gid] [switches]\n"
 435                                 "\t-V etcdir      alternate /etc location\n"
 436                                 "\t-R rootir      alternate root directory\n"
 437                                 "\t-n name        group name\n"
 438                                 "\t-g gid         group id\n"
 439                                 "\t-Y             update NIS maps\n",
 440                                 "usage: pw groupmod [group|gid] [switches]\n"
 441                                 "\t-V etcdir      alternate /etc location\n"
 442                                 "\t-R rootir      alternate root directory\n"
 443                                 "\t-C config      configuration file\n"
 444                                 "\t-q             quiet operation\n"
 445                                 "\t-F             force add if not exists\n"
 446                                 "\t-n name        group name\n"
 447                                 "\t-g gid         group id\n"
 448                                 "\t-M usr1,usr2   replaces users as group members\n"
 449                                 "\t-m usr1,usr2   add users as group members\n"
 450                                 "\t-d usr1,usr2   delete users as group members\n"
 451                                 "\t-l name        new group name\n"
 452                                 "\t-Y             update NIS maps\n"
 453                                 "\t-N             no update\n",
 454                                 "usage: pw groupshow [group|gid] [switches]\n"
 455                                 "\t-V etcdir      alternate /etc location\n"
 456                                 "\t-R rootir      alternate root directory\n"
 457                                 "\t-n name        group name\n"
 458                                 "\t-g gid         group id\n"
 459                                 "\t-F             force print\n"
 460                                 "\t-P             prettier format\n"
 461                                 "\t-a             print all accounting groups\n",
 462                                 "usage: pw groupnext [switches]\n"
 463                                 "\t-V etcdir      alternate /etc location\n"
 464                                 "\t-R rootir      alternate root directory\n"
 465                                 "\t-C config      configuration file\n"
 466                                 "\t-q             quiet operation\n"
 467                         }
 468                 };
 469
 470                 fprintf(stderr, "%s", help[which][mode]);
 471         }
 472         exit(EXIT_FAILURE);
 473 }
 474
 475 struct carg    *
 476 getarg(struct cargs * _args, int ch)
 477 {
 478         struct carg    *c = LIST_FIRST(_args);
 479
 480         while (c != NULL && c->ch != ch)
 481                 c = LIST_NEXT(c, list);
 482         return c;
 483 }
 484
 485 struct carg    *
 486 addarg(struct cargs * _args, int ch, char *argstr)
 487 {
 488         struct carg    *ca = malloc(sizeof(struct carg));
 489
 490         if (ca == NULL)
 491                 errx(EX_OSERR, "out of memory");
 492         ca->ch = ch;
 493         ca->val = argstr;
 494         LIST_INSERT_HEAD(_args, ca, list);
 495         return ca;
 496 }