usr.sbin/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  * $FreeBSD: src/usr.sbin/pw/pw.c,v 1.18.2.5 2001/07/19 01:46:55 kris Exp $
  27  * $DragonFly: src/usr.sbin/pw/pw.c,v 1.3 2004/12/18 22:48:04 swildner Exp $
  28  */
  29
  30 #include <err.h>
  31 #include <fcntl.h>
  32 #include <locale.h>
  33 #include <paths.h>
  34 #include <sys/wait.h>
  35 #include "pw.h"
  36
  37 #if !defined(_PATH_YP)
  38 #define _PATH_YP        "/var/yp/"
  39 #endif
  40 const char     *Modes[] = {
  41   "add", "del", "mod", "show", "next",
  42   NULL};
  43 const char     *Which[] = {"user", "group", NULL};
  44 static const char *Combo1[] = {
  45   "useradd", "userdel", "usermod", "usershow", "usernext",
  46   "lock", "unlock",
  47   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  48   NULL};
  49 static const char *Combo2[] = {
  50   "adduser", "deluser", "moduser", "showuser", "nextuser",
  51   "lock", "unlock",
  52   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  53   NULL};
  54
  55 struct pwf PWF =
  56 {
  57         0,
  58         setpwent,
  59         endpwent,
  60         getpwent,
  61         getpwuid,
  62         getpwnam,
  63         pwdb,
  64         setgrent,
  65         endgrent,
  66         getgrent,
  67         getgrgid,
  68         getgrnam,
  69         grdb
  70
  71 };
  72 struct pwf VPWF =
  73 {
  74         1,
  75         vsetpwent,
  76         vendpwent,
  77         vgetpwent,
  78         vgetpwuid,
  79         vgetpwnam,
  80         vpwdb,
  81         vsetgrent,
  82         vendgrent,
  83         vgetgrent,
  84         vgetgrgid,
  85         vgetgrnam,
  86         vgrdb
  87 };
  88
  89 static struct cargs arglist;
  90
  91 static int      getindex(const char *words[], const char *word);
  92 static void     cmdhelp(int mode, int which);
  93
  94
  95 int
  96 main(int argc, char *argv[])
  97 {
  98         int             ch;
  99         int             mode = -1;
 100         int             which = -1;
 101         char            *config = NULL;
 102         struct userconf *cnf;
 103
 104         static const char *opts[W_NUM][M_NUM] =
 105         {
 106                 { /* user */
 107                         "V:C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
 108                         "V:C:qn:u:rY",
 109                         "V:C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
 110                         "V:C:qn:u:FPa7",
 111                         "V:C:q",
 112                         "V:C:q",
 113                         "V:C:q"
 114                 },
 115                 { /* grp  */
 116                         "V:C:qn:g:h:M:pNPY",
 117                         "V:C:qn:g:Y",
 118                         "V:C:qn:g:l:h:FM:m:NPY",
 119                         "V:C:qn:g:FPa",
 120                         "V:C:q"
 121                  }
 122         };
 123
 124         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
 125         {                       /* Request handlers */
 126                 pw_user,
 127                 pw_group
 128         };
 129
 130         umask(0);               /* We wish to handle this manually */
 131         LIST_INIT(&arglist);
 132
 133         setlocale(LC_ALL, "");
 134
 135         /*
 136          * Break off the first couple of words to determine what exactly
 137          * we're being asked to do
 138          */
 139         while (argc > 1) {
 140                 int             tmp;
 141
 142                 if (*argv[1] == '-') {
 143                         /*
 144                          * Special case, allow pw -V<dir> <operation> [args] for scripts etc.
 145                          */
 146                         if (argv[1][1] == 'V') {
 147                                 optarg = &argv[1][2];
 148                                 if (*optarg == '\0') {
 149                                         optarg = argv[2];
 150                                         ++argv;
 151                                         --argc;
 152                                 }
 153                                 addarg(&arglist, 'V', optarg);
 154                         } else
 155                                 break;
 156                 }
 157                 else if (mode == -1 && (tmp = getindex(Modes, argv[1])) != -1)
 158                         mode = tmp;
 159                 else if (which == -1 && (tmp = getindex(Which, argv[1])) != -1)
 160                         which = tmp;
 161                 else if ((mode == -1 && which == -1) &&
 162                          ((tmp = getindex(Combo1, argv[1])) != -1 ||
 163                           (tmp = getindex(Combo2, argv[1])) != -1)) {
 164                         which = tmp / M_NUM;
 165                         mode = tmp % M_NUM;
 166                 } else if (strcmp(argv[1], "help") == 0 && argv[2] == NULL)
 167                         cmdhelp(mode, which);
 168                 else if (which != -1 && mode != -1)
 169                         addarg(&arglist, 'n', argv[1]);
 170                 else
 171                         errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
 172                 ++argv;
 173                 --argc;
 174         }
 175
 176         /*
 177          * Bail out unless the user is specific!
 178          */
 179         if (mode == -1 || which == -1)
 180                 cmdhelp(mode, which);
 181
 182         /*
 183          * We know which mode we're in and what we're about to do, so now
 184          * let's dispatch the remaining command line args in a genric way.
 185          */
 186         optarg = NULL;
 187
 188         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 189                 if (ch == '?')
 190                         errx(EX_USAGE, "unknown switch");
 191                 else
 192                         addarg(&arglist, ch, optarg);
 193                 optarg = NULL;
 194         }
 195
 196         /*
 197          * Must be root to attempt an update
 198          */
 199         if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
 200                 errx(EX_NOPERM, "you must be root to run this program");
 201
 202         /*
 203          * We should immediately look for the -q 'quiet' switch so that we
 204          * don't bother with extraneous errors
 205          */
 206         if (getarg(&arglist, 'q') != NULL)
 207                 freopen(_PATH_DEVNULL, "w", stderr);
 208
 209         /*
 210          * Set our base working path if not overridden
 211          */
 212
 213         config = getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL;
 214
 215         if (getarg(&arglist, 'V') != NULL) {
 216                 char * etcpath = getarg(&arglist, 'V')->val;
 217                 if (*etcpath) {
 218                         if (config == NULL) {   /* Only override config location if -C not specified */
 219                                 config = malloc(MAXPATHLEN);
 220                                 snprintf(config, MAXPATHLEN, "%s/pw.conf", etcpath);
 221                         }
 222                         memcpy(&PWF, &VPWF, sizeof PWF);
 223                         setpwdir(etcpath);
 224                         setgrdir(etcpath);
 225                 }
 226         }
 227
 228         /*
 229          * Now, let's do the common initialisation
 230          */
 231         cnf = read_userconfig(config);
 232
 233         ch = funcs[which] (cnf, mode, &arglist);
 234
 235         /*
 236          * If everything went ok, and we've been asked to update
 237          * the NIS maps, then do it now
 238          */
 239         if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
 240                 pid_t   pid;
 241
 242                 fflush(NULL);
 243                 if (chdir(_PATH_YP) == -1)
 244                         warn("chdir(" _PATH_YP ")");
 245                 else if ((pid = fork()) == -1)
 246                         warn("fork()");
 247                 else if (pid == 0) {
 248                         /* Is make anywhere else? */
 249                         execlp("/usr/bin/make", "make", NULL);
 250                         _exit(1);
 251                 } else {
 252                         int   i;
 253                         waitpid(pid, &i, 0);
 254                         if ((i = WEXITSTATUS(i)) != 0)
 255                                 errx(ch, "make exited with status %d", i);
 256                         else
 257                                 pw_log(cnf, mode, which, "NIS maps updated");
 258                 }
 259         }
 260         return ch;
 261 }
 262
 263
 264 static int
 265 getindex(const char *words[], const char *word)
 266 {
 267         int             i = 0;
 268
 269         while (words[i]) {
 270                 if (strcmp(words[i], word) == 0)
 271                         return i;
 272                 i++;
 273         }
 274         return -1;
 275 }
 276
 277
 278 /*
 279  * This is probably an overkill for a cmdline help system, but it reflects
 280  * the complexity of the command line.
 281  */
 282
 283 static void
 284 cmdhelp(int mode, int which)
 285 {
 286         if (which == -1)
 287                 fprintf(stderr, "usage:\n  pw [user|group|lock|unlock] [add|del|mod|show|next] [help|switches/values]\n");
 288         else if (mode == -1)
 289                 fprintf(stderr, "usage:\n  pw %s [add|del|mod|show|next] [help|switches/values]\n", Which[which]);
 290         else {
 291
 292                 /*
 293                  * We need to give mode specific help
 294                  */
 295                 static const char *help[W_NUM][M_NUM] =
 296                 {
 297                         {
 298                                 "usage: pw useradd [name] [switches]\n"
 299                                 "\t-V etcdir      alternate /etc location\n"
 300                                 "\t-C config      configuration file\n"
 301                                 "\t-q             quiet operation\n"
 302                                 "  Adding users:\n"
 303                                 "\t-n name        login name\n"
 304                                 "\t-u uid         user id\n"
 305                                 "\t-c comment     user name/comment\n"
 306                                 "\t-d directory   home directory\n"
 307                                 "\t-e date        account expiry date\n"
 308                                 "\t-p date        password expiry date\n"
 309                                 "\t-g grp         initial group\n"
 310                                 "\t-G grp1,grp2   additional groups\n"
 311                                 "\t-m [ -k dir ]  create and set up home\n"
 312                                 "\t-s shell       name of login shell\n"
 313                                 "\t-o             duplicate uid ok\n"
 314                                 "\t-L class       user class\n"
 315                                 "\t-h fd          read password on fd\n"
 316                                 "\t-Y             update NIS maps\n"
 317                                 "\t-N             no update\n"
 318                                 "  Setting defaults:\n"
 319                                 "\t-V etcdir      alternate /etc location\n"
 320                                 "\t-D             set user defaults\n"
 321                                 "\t-b dir         default home root dir\n"
 322                                 "\t-e period      default expiry period\n"
 323                                 "\t-p period      default password change period\n"
 324                                 "\t-g group       default group\n"
 325                                 "\t-G grp1,grp2   additional groups\n"
 326                                 "\t-L class       default user class\n"
 327                                 "\t-k dir         default home skeleton\n"
 328                                 "\t-u min,max     set min,max uids\n"
 329                                 "\t-i min,max     set min,max gids\n"
 330                                 "\t-w method      set default password method\n"
 331                                 "\t-s shell       default shell\n"
 332                                 "\t-y path        set NIS passwd file path\n",
 333                                 "usage: pw userdel [uid|name] [switches]\n"
 334                                 "\t-V etcdir      alternate /etc location\n"
 335                                 "\t-n name        login name\n"
 336                                 "\t-u uid         user id\n"
 337                                 "\t-Y             update NIS maps\n"
 338                                 "\t-r             remove home & contents\n",
 339                                 "usage: pw usermod [uid|name] [switches]\n"
 340                                 "\t-V etcdir      alternate /etc location\n"
 341                                 "\t-C config      configuration file\n"
 342                                 "\t-q             quiet operation\n"
 343                                 "\t-F             force add if no user\n"
 344                                 "\t-n name        login name\n"
 345                                 "\t-u uid         user id\n"
 346                                 "\t-c comment     user name/comment\n"
 347                                 "\t-d directory   home directory\n"
 348                                 "\t-e date        account expiry date\n"
 349                                 "\t-p date        password expiry date\n"
 350                                 "\t-g grp         initial group\n"
 351                                 "\t-G grp1,grp2   additional groups\n"
 352                                 "\t-l name        new login name\n"
 353                                 "\t-L class       user class\n"
 354                                 "\t-m [ -k dir ]  create and set up home\n"
 355                                 "\t-s shell       name of login shell\n"
 356                                 "\t-w method      set new password using method\n"
 357                                 "\t-h fd          read password on fd\n"
 358                                 "\t-Y             update NIS maps\n"
 359                                 "\t-N             no update\n",
 360                                 "usage: pw usershow [uid|name] [switches]\n"
 361                                 "\t-V etcdir      alternate /etc location\n"
 362                                 "\t-n name        login name\n"
 363                                 "\t-u uid         user id\n"
 364                                 "\t-F             force print\n"
 365                                 "\t-P             prettier format\n"
 366                                 "\t-a             print all users\n"
 367                                 "\t-7             print in v7 format\n",
 368                                 "usage: pw usernext [switches]\n"
 369                                 "\t-V etcdir      alternate /etc location\n"
 370                                 "\t-C config      configuration file\n"
 371                                 "\t-q             quiet operation\n",
 372                                 "usage pw: lock [switches]\n"
 373                                 "\t-V etcdir      alternate /etc locations\n"
 374                                 "\t-C config      configuration file\n"
 375                                 "\t-q             quiet operation\n",
 376                                 "usage pw: unlock [switches]\n"
 377                                 "\t-V etcdir      alternate /etc locations\n"
 378                                 "\t-C config      configuration file\n"
 379                                 "\t-q             quiet operation\n"
 380                         },
 381                         {
 382                                 "usage: pw groupadd [group|gid] [switches]\n"
 383                                 "\t-V etcdir      alternate /etc location\n"
 384                                 "\t-C config      configuration file\n"
 385                                 "\t-q             quiet operation\n"
 386                                 "\t-n group       group name\n"
 387                                 "\t-g gid         group id\n"
 388                                 "\t-M usr1,usr2   add users as group members\n"
 389                                 "\t-o             duplicate gid ok\n"
 390                                 "\t-Y             update NIS maps\n"
 391                                 "\t-N             no update\n",
 392                                 "usage: pw groupdel [group|gid] [switches]\n"
 393                                 "\t-V etcdir      alternate /etc location\n"
 394                                 "\t-n name        group name\n"
 395                                 "\t-g gid         group id\n"
 396                                 "\t-Y             update NIS maps\n",
 397                                 "usage: pw groupmod [group|gid] [switches]\n"
 398                                 "\t-V etcdir      alternate /etc location\n"
 399                                 "\t-C config      configuration file\n"
 400                                 "\t-q             quiet operation\n"
 401                                 "\t-F             force add if not exists\n"
 402                                 "\t-n name        group name\n"
 403                                 "\t-g gid         group id\n"
 404                                 "\t-M usr1,usr2   replaces users as group members\n"
 405                                 "\t-m usr1,usr2   add users as group members\n"
 406                                 "\t-l name        new group name\n"
 407                                 "\t-Y             update NIS maps\n"
 408                                 "\t-N             no update\n",
 409                                 "usage: pw groupshow [group|gid] [switches]\n"
 410                                 "\t-V etcdir      alternate /etc location\n"
 411                                 "\t-n name        group name\n"
 412                                 "\t-g gid         group id\n"
 413                                 "\t-F             force print\n"
 414                                 "\t-P             prettier format\n"
 415                                 "\t-a             print all accounting groups\n",
 416                                 "usage: pw groupnext [switches]\n"
 417                                 "\t-V etcdir      alternate /etc location\n"
 418                                 "\t-C config      configuration file\n"
 419                                 "\t-q             quiet operation\n"
 420                         }
 421                 };
 422
 423                 fprintf(stderr, "%s", help[which][mode]);
 424         }
 425         exit(EXIT_FAILURE);
 426 }
 427
 428 struct carg    *
 429 getarg(struct cargs * _args, int ch)
 430 {
 431         struct carg    *c = _args->lh_first;
 432
 433         while (c != NULL && c->ch != ch)
 434                 c = c->list.le_next;
 435         return c;
 436 }
 437
 438 struct carg    *
 439 addarg(struct cargs * _args, int ch, char *argstr)
 440 {
 441         struct carg    *ca = malloc(sizeof(struct carg));
 442
 443         if (ca == NULL)
 444                 errx(EX_OSERR, "out of memory");
 445         ca->ch = ch;
 446         ca->val = argstr;
 447         LIST_INSERT_HEAD(_args, ca, list);
 448         return ca;
 449 }