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