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