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 1.10 1998/08/04 22:31:26 nate Exp $";
  30 #endif /* not lint */
  31
  32 #include "pw.h"
  33 #include <err.h>
  34 #include <fcntl.h>
  35 #include <paths.h>
  36 #include <sys/wait.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 static struct cargs arglist;
  50
  51 static int      getindex(const char *words[], const char *word);
  52 static void     cmdhelp(int mode, int which);
  53
  54
  55 int
  56 main(int argc, char *argv[])
  57 {
  58         int             ch;
  59         int             mode = -1;
  60         int             which = -1;
  61         struct userconf *cnf;
  62
  63         static const char *opts[W_NUM][M_NUM] =
  64         {
  65                 { /* user */
  66                         "C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
  67                         "C:qn:u:rY",
  68                         "C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
  69                         "C:qn:u:FPa",
  70                         "C:q"
  71                 },
  72                 { /* grp  */
  73                         "C:qn:g:h:M:pNPY",
  74                         "C:qn:g:Y",
  75                         "C:qn:g:l:h:FM:m:NPY",
  76                         "C:qn:g:FPa",
  77                         "C:q"
  78                  }
  79         };
  80
  81         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
  82         {                       /* Request handlers */
  83                 pw_user,
  84                 pw_group
  85         };
  86
  87         umask(0);               /* We wish to handle this manually */
  88         LIST_INIT(&arglist);
  89
  90         /*
  91          * Break off the first couple of words to determine what exactly
  92          * we're being asked to do
  93          */
  94         while (argc > 1 && *argv[1] != '-') {
  95                 int             tmp;
  96
  97                 if ((tmp = getindex(Modes, argv[1])) != -1)
  98                         mode = tmp;
  99                 else if ((tmp = getindex(Which, argv[1])) != -1)
 100                         which = tmp;
 101                 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
 102                         which = tmp / M_NUM;
 103                         mode = tmp % M_NUM;
 104                 } else if (strcmp(argv[1], "help") == 0)
 105                         cmdhelp(mode, which);
 106                 else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
 107                         addarg(&arglist, 'n', argv[1]);
 108                 else
 109                         errx(EX_USAGE, "unknown keyword `%s'", argv[1]);
 110                 ++argv;
 111                 --argc;
 112         }
 113
 114         /*
 115          * Bail out unless the user is specific!
 116          */
 117         if (mode == -1 || which == -1)
 118                 cmdhelp(mode, which);
 119
 120         /*
 121          * We know which mode we're in and what we're about to do, so now
 122          * let's dispatch the remaining command line args in a genric way.
 123          */
 124         optarg = NULL;
 125
 126         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 127                 if (ch == '?')
 128                         errx(EX_USAGE, NULL);
 129                 else
 130                         addarg(&arglist, ch, optarg);
 131                 optarg = NULL;
 132         }
 133
 134         /*
 135          * Must be root to attempt an update
 136          */
 137         if (geteuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
 138                 errx(EX_NOPERM, "you must be root to run this program");
 139
 140         /*
 141          * We should immediately look for the -q 'quiet' switch so that we
 142          * don't bother with extraneous errors
 143          */
 144         if (getarg(&arglist, 'q') != NULL)
 145                 freopen("/dev/null", "w", stderr);
 146
 147         /*
 148          * Now, let's do the common initialisation
 149          */
 150         cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
 151
 152         ch = funcs[which] (cnf, mode, &arglist);
 153
 154         /*
 155          * If everything went ok, and we've been asked to update
 156          * the NIS maps, then do it now
 157          */
 158         if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
 159                 pid_t   pid;
 160
 161                 fflush(NULL);
 162                 if (chdir(_PATH_YP) == -1)
 163                         warn("chdir(" _PATH_YP ")");
 164                 else if ((pid = fork()) == -1)
 165                         warn("fork()");
 166                 else if (pid == 0) {
 167                         /* Is make anywhere else? */
 168                         execlp("/usr/bin/make", "make", NULL);
 169                         _exit(1);
 170                 } else {
 171                         int   i;
 172                         waitpid(pid, &i, 0);
 173                         if ((i = WEXITSTATUS(i)) != 0)
 174                                 errx(ch, "make exited with status %d", i);
 175                         else
 176                                 pw_log(cnf, mode, which, "NIS maps updated");
 177                 }
 178         }
 179         return ch;
 180 }
 181
 182
 183 static int
 184 getindex(const char *words[], const char *word)
 185 {
 186         int             i = 0;
 187
 188         while (words[i]) {
 189                 if (strcmp(words[i], word) == 0)
 190                         return i;
 191                 i++;
 192         }
 193         return -1;
 194 }
 195
 196
 197 /*
 198  * This is probably an overkill for a cmdline help system, but it reflects
 199  * the complexity of the command line.
 200  */
 201
 202 static void
 203 cmdhelp(int mode, int which)
 204 {
 205         if (which == -1)
 206                 fprintf(stderr, "usage: pw [user|group] [add|del|mod|show|next] [ help | switches/values ]\n");
 207         else if (mode == -1)
 208                 fprintf(stderr, "usage: pw %s [add|del|mod|show|next] [ help | switches/values ]\n", Which[which]);
 209         else {
 210
 211                 /*
 212                  * We need to give mode specific help
 213                  */
 214                 static const char *help[W_NUM][M_NUM] =
 215                 {
 216                         {
 217                                 "usage: pw useradd [name] [switches]\n"
 218                                 "\t-C config      configuration file\n"
 219                                 "\t-q             quiet operation\n"
 220                                 "  Adding users:\n"
 221                                 "\t-n name        login name\n"
 222                                 "\t-u uid         user id\n"
 223                                 "\t-c comment     user name/comment\n"
 224                                 "\t-d directory   home directory\n"
 225                                 "\t-e date        account expiry date\n"
 226                                 "\t-p date        password expiry date\n"
 227                                 "\t-g grp         initial group\n"
 228                                 "\t-G grp1,grp2   additional groups\n"
 229                                 "\t-m [ -k dir ]  create and set up home\n"
 230                                 "\t-s shell       name of login shell\n"
 231                                 "\t-o             duplicate uid ok\n"
 232                                 "\t-L class       user class\n"
 233                                 "\t-h fd          read password on fd\n"
 234                                 "\t-Y             update NIS maps\n"
 235                                 "\t-N             no update\n"
 236                                 "  Setting defaults:\n"
 237                                 "\t-D             set user defaults\n"
 238                                 "\t-b dir         default home root dir\n"
 239                                 "\t-e period      default expiry period\n"
 240                                 "\t-p period      default password change period\n"
 241                                 "\t-g group       default group\n"
 242                                 "\t-G grp1,grp2   additional groups\n"
 243                                 "\t-L class       default user class\n"
 244                                 "\t-k dir         default home skeleton\n"
 245                                 "\t-u min,max     set min,max uids\n"
 246                                 "\t-i min,max     set min,max gids\n"
 247                                 "\t-w method      set default password method\n"
 248                                 "\t-s shell       default shell\n"
 249                                 "\t-y path        set NIS passwd file path\n",
 250                                 "usage: pw userdel [uid|name] [switches]\n"
 251                                 "\t-n name        login name\n"
 252                                 "\t-u uid         user id\n"
 253                                 "\t-Y             update NIS maps\n"
 254                                 "\t-r             remove home & contents\n",
 255                                 "usage: pw usermod [uid|name] [switches]\n"
 256                                 "\t-C config      configuration file\n"
 257                                 "\t-q             quiet operation\n"
 258                                 "\t-F             force add if no user\n"
 259                                 "\t-n name        login name\n"
 260                                 "\t-u uid         user id\n"
 261                                 "\t-c comment     user name/comment\n"
 262                                 "\t-d directory   home directory\n"
 263                                 "\t-e date        account expiry date\n"
 264                                 "\t-p date        password expiry date\n"
 265                                 "\t-g grp         initial group\n"
 266                                 "\t-G grp1,grp2   additional groups\n"
 267                                 "\t-l name        new login name\n"
 268                                 "\t-L class       user class\n"
 269                                 "\t-m [ -k dir ]  create and set up home\n"
 270                                 "\t-s shell       name of login shell\n"
 271                                 "\t-w method      set new password using method\n"
 272                                 "\t-h fd          read password on fd\n"
 273                                 "\t-Y             update NIS maps\n"
 274                                 "\t-N             no update\n",
 275                                 "usage: pw usershow [uid|name] [switches]\n"
 276                                 "\t-n name        login name\n"
 277                                 "\t-u uid         user id\n"
 278                                 "\t-F             force print\n"
 279                                 "\t-P             prettier format\n"
 280                                 "\t-a             print all users\n",
 281                                 "usage: pw usernext [switches]\n"
 282                                 "\t-C config      configuration file\n"
 283                         },
 284                         {
 285                                 "usage: pw groupadd [group|gid] [switches]\n"
 286                                 "\t-C config      configuration file\n"
 287                                 "\t-q             quiet operation\n"
 288                                 "\t-n group       group name\n"
 289                                 "\t-g gid         group id\n"
 290                                 "\t-M usr1,usr2   add users as group members\n"
 291                                 "\t-o             duplicate gid ok\n"
 292                                 "\t-Y             update NIS maps\n"
 293                                 "\t-N             no update\n",
 294                                 "usage: pw groupdel [group|gid] [switches]\n"
 295                                 "\t-n name        group name\n"
 296                                 "\t-g gid         group id\n"
 297                                 "\t-Y             update NIS maps\n",
 298                                 "usage: pw groupmod [group|gid] [switches]\n"
 299                                 "\t-C config      configuration file\n"
 300                                 "\t-q             quiet operation\n"
 301                                 "\t-F             force add if not exists\n"
 302                                 "\t-n name        group name\n"
 303                                 "\t-g gid         group id\n"
 304                                 "\t-M usr1,usr2   replaces users as group members\n"
 305                                 "\t-m usr1,usr2   add users as group members\n"
 306                                 "\t-l name        new group name\n"
 307                                 "\t-Y             update NIS maps\n"
 308                                 "\t-N             no update\n",
 309                                 "usage: pw groupshow [group|gid] [switches]\n"
 310                                 "\t-n name        group name\n"
 311                                 "\t-g gid         group id\n"
 312                                 "\t-F             force print\n"
 313                                 "\t-P             prettier format\n"
 314                                 "\t-a             print all accounting groups\n",
 315                                 "usage: pw groupnext [switches]\n"
 316                                 "\t-C config      configuration file\n"
 317                         }
 318                 };
 319
 320                 fprintf(stderr, help[which][mode]);
 321         }
 322         exit(EXIT_FAILURE);
 323 }
 324
 325 struct carg    *
 326 getarg(struct cargs * _args, int ch)
 327 {
 328         struct carg    *c = _args->lh_first;
 329
 330         while (c != NULL && c->ch != ch)
 331                 c = c->list.le_next;
 332         return c;
 333 }
 334
 335 struct carg    *
 336 addarg(struct cargs * _args, int ch, char *argstr)
 337 {
 338         struct carg    *ca = malloc(sizeof(struct carg));
 339
 340         if (ca == NULL)
 341                 errx(EX_OSERR, "out of memory");
 342         ca->ch = ch;
 343         ca->val = argstr;
 344         LIST_INSERT_HEAD(_args, ca, list);
 345         return ca;
 346 }