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         "$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
  38 const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
  39 const char     *Which[] = {"user", "group", NULL};
  40 static const char *Combo1[] = {
  41   "useradd", "userdel", "usermod", "usershow", "usernext",
  42   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  43   NULL};
  44 static const char *Combo2[] = {
  45   "adduser", "deluser", "moduser", "showuser", "nextuser",
  46   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  47 NULL};
  48
  49 struct 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 };
  66 struct 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
  83 static struct cargs arglist;
  84
  85 static int      getindex(const char *words[], const char *word);
  86 static void     cmdhelp(int mode, int which);
  87
  88
  89 int
  90 main(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
 252 static int
 253 getindex(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
 271 static void
 272 cmdhelp(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
 405 struct carg    *
 406 getarg(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
 415 struct carg    *
 416 addarg(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 }