pw/pw.c

   1 /*-
   2  * Copyright (c) 1996 by David L. Nugent <davidn@blaze.net.au>.
   3  * 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 as
  10  *    the first lines of this file unmodified.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by David L. Nugent.
  17  * 4. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE DAVID L. NUGENT ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      $Id$
  33  */
  34
  35 #include "pw.h"
  36
  37 static char    *progname = "pw";
  38
  39 const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
  40 const char     *Which[] = {"user", "group", NULL};
  41 static const char *Combo1[] = {
  42   "useradd", "userdel", "usermod", "usershow", "usernext",
  43   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  44   NULL};
  45 static const char *Combo2[] = {
  46   "adduser", "deluser", "moduser", "showuser", "nextuser",
  47   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  48 NULL};
  49
  50 static struct cargs arglist;
  51
  52 static int      getindex(const char *words[], const char *word);
  53 static void     cmdhelp(int mode, int which);
  54
  55
  56 int
  57 main(int argc, char *argv[])
  58 {
  59         int             ch;
  60         int             mode = -1;
  61         int             which = -1;
  62         struct userconf *cnf;
  63
  64         static const char *opts[W_NUM][M_NUM] =
  65         {
  66                 { /* user */
  67                         "C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NP",
  68                         "C:qn:u:r",
  69                         "C:qn:u:c:d:e:p:g:G:mk:s:w:L:h:FNP",
  70                         "C:qn:u:FPa",
  71                         "C:q"
  72                 },
  73                 { /* grp  */
  74                         "C:qn:g:h:M:pNP",
  75                         "C:qn:g:",
  76                         "C:qn:g:l:h:FM:m:NP",
  77                         "C:qn:g:FPa",
  78                         "C:q"
  79                  }
  80         };
  81
  82         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
  83         {                       /* Request handlers */
  84                 pw_user,
  85                 pw_group
  86         };
  87
  88         umask(0);               /* We wish to handle this manually */
  89         progname = strrchr(argv[0], '/');
  90         if (progname != NULL)
  91                 ++progname;
  92         else
  93                 progname = argv[0];
  94
  95         LIST_INIT(&arglist);
  96
  97         /*
  98          * Break off the first couple of words to determine what exactly
  99          * we're being asked to do
 100          */
 101         while (argc > 1 && *argv[1] != '-') {
 102                 int             tmp;
 103
 104                 if ((tmp = getindex(Modes, argv[1])) != -1)
 105                         mode = tmp;
 106                 else if ((tmp = getindex(Which, argv[1])) != -1)
 107                         which = tmp;
 108                 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
 109                         which = tmp / M_NUM;
 110                         mode = tmp % M_NUM;
 111                 } else if (strcmp(argv[1], "help") == 0)
 112                         cmdhelp(mode, which);
 113                 else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
 114                         addarg(&arglist, 'n', argv[1]);
 115                 else
 116                         cmderr(EX_USAGE, "Unknown keyword `%s'\n", argv[1]);
 117                 ++argv;
 118                 --argc;
 119         }
 120
 121         /*
 122          * Bail out unless the user is specific!
 123          */
 124         if (mode == -1 || which == -1)
 125                 cmdhelp(mode, which);
 126
 127         /*
 128          * We know which mode we're in and what we're about to do, so now
 129          * let's dispatch the remaining command line args in a genric way.
 130          */
 131         argv[0] = progname;     /* Preserve this */
 132         optarg = NULL;
 133
 134         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 135                 if (ch == '?')
 136                         cmderr(EX_USAGE, NULL);
 137                 else
 138                         addarg(&arglist, ch, optarg);
 139                 optarg = NULL;
 140         }
 141
 142         /*
 143          * Must be root to attempt an update
 144          */
 145         if (getuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
 146                 cmderr(EX_NOPERM, "you must be root to run this program\n");
 147
 148         /*
 149          * We should immediately look for the -q 'quiet' switch so that we
 150          * don't bother with extraneous errors
 151          */
 152         if (getarg(&arglist, 'q') != NULL)
 153                 freopen("/dev/null", "w", stderr);
 154
 155         /*
 156          * Now, let's do the common initialisation
 157          */
 158         cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
 159         return funcs[which] (cnf, mode, &arglist);
 160 }
 161
 162 static int
 163 getindex(const char *words[], const char *word)
 164 {
 165         int             i = 0;
 166
 167         while (words[i]) {
 168                 if (strcmp(words[i], word) == 0)
 169                         return i;
 170                 i++;
 171         }
 172         return -1;
 173 }
 174
 175
 176 /*
 177  * This is probably an overkill for a cmdline help system, but it reflects
 178  * the complexity of the command line.
 179  */
 180
 181 static void
 182 banner(void)
 183 {
 184         fprintf(stderr, "%s: ", progname);
 185 }
 186
 187 void
 188 cmderr(int ec, char const * fmt,...)
 189 {
 190         if (fmt != NULL) {
 191                 va_list         argp;
 192
 193                 banner();
 194                 va_start(argp, fmt);
 195                 vfprintf(stderr, fmt, argp);
 196                 va_end(argp);
 197         }
 198         exit(ec);
 199 }
 200
 201 static void
 202 cmdhelp(int mode, int which)
 203 {
 204         banner();
 205         if (which == -1)
 206                 fprintf(stderr, "usage: %s [user|group] [add|del|mod|show|next] [ help | switches/values ]\n", progname);
 207         else if (mode == -1)
 208                 fprintf(stderr, "usage: %s %s [add|del|mod|show|next] [ help | switches/values ]\n", progname, 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: %s 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-N             no update\n"
 235                                 "  Setting defaults:\n"
 236                                 "\t-D             set user defaults\n"
 237                                 "\t-b dir         default home root dir\n"
 238                                 "\t-e period      default expiry period\n"
 239                                 "\t-p period      default password change period\n"
 240                                 "\t-g group       default group\n"
 241                                 "\t-G grp1,grp2   additional groups\n"
 242                                 "\t-L class       default user class\n"
 243                                 "\t-k dir         default home skeleton\n"
 244                                 "\t-u min,max     set min,max uids\n"
 245                                 "\t-i min,max     set min,max gids\n"
 246                                 "\t-w method      set default password method\n"
 247                                 "\t-s shell       default shell\n",
 248                                 "usage: %s userdel [uid|name] [switches]\n"
 249                                 "\t-n name        login name\n"
 250                                 "\t-u uid         user id\n"
 251                                 "\t-r             remove home & contents\n",
 252                                 "usage: %s usermod [uid|name] [switches]\n"
 253                                 "\t-C config      configuration file\n"
 254                                 "\t-q             quiet operation\n"
 255                                 "\t-F             force add if no user\n"
 256                                 "\t-n name        login name\n"
 257                                 "\t-u uid         user id\n"
 258                                 "\t-c comment     user name/comment\n"
 259                                 "\t-d directory   home directory\n"
 260                                 "\t-e date        account expiry date\n"
 261                                 "\t-p date        password expiry date\n"
 262                                 "\t-g grp         initial group\n"
 263                                 "\t-G grp1,grp2   additional groups\n"
 264                                 "\t-l name        new login name\n"
 265                                 "\t-L class       user class\n"
 266                                 "\t-m [ -k dir ]  create and set up home\n"
 267                                 "\t-s shell       name of login shell\n"
 268                                 "\t-w method      set new password using method\n"
 269                                 "\t-h fd          read password on fd\n"
 270                                 "\t-N             no update\n",
 271                                 "usage: %s usershow [uid|name] [switches]\n"
 272                                 "\t-n name        login name\n"
 273                                 "\t-u uid         user id\n"
 274                                 "\t-F             force print\n"
 275                                 "\t-P             prettier format\n"
 276                                 "\t-a             print all users\n",
 277                                 "usage: %s usernext [switches]\n"
 278                                 "\t-C config      configuration file\n"
 279                         },
 280                         {
 281                                 "usage: %s groupadd [group|gid] [switches]\n"
 282                                 "\t-C config      configuration file\n"
 283                                 "\t-q             quiet operation\n"
 284                                 "\t-n group       group name\n"
 285                                 "\t-g gid         group id\n"
 286                                 "\t-M usr1,usr2   add users as group members\n"
 287                                 "\t-o             duplicate gid ok\n"
 288                                 "\t-N             no update\n",
 289                                 "usage: %s groupdel [group|gid] [switches]\n"
 290                                 "\t-n name        group name\n"
 291                                 "\t-g gid         group id\n",
 292                                 "usage: %s groupmod [group|gid] [switches]\n"
 293                                 "\t-C config      configuration file\n"
 294                                 "\t-q             quiet operation\n"
 295                                 "\t-F             force add if not exists\n"
 296                                 "\t-n name        group name\n"
 297                                 "\t-g gid         group id\n"
 298                                 "\t-M usr1,usr2   replaces users as group members\n"
 299                                 "\t-m usr1,usr2   add users as group members\n"
 300                                 "\t-l name        new group name\n"
 301                                 "\t-N             no update\n",
 302                                 "usage: %s groupshow [group|gid] [switches]\n"
 303                                 "\t-n name        group name\n"
 304                                 "\t-g gid         group id\n"
 305                                 "\t-F             force print\n"
 306                                 "\t-P             prettier format\n"
 307                                 "\t-a             print all accounting groups\n",
 308                                 "usage: %s groupnext [switches]\n"
 309                                 "\t-C config      configuration file\n"
 310                         }
 311                 };
 312
 313                 fprintf(stderr, help[which][mode], progname);
 314         }
 315         exit(EXIT_FAILURE);
 316 }
 317
 318 struct carg    *
 319 getarg(struct cargs * _args, int ch)
 320 {
 321         struct carg    *c = _args->lh_first;
 322
 323         while (c != NULL && c->ch != ch)
 324                 c = c->list.le_next;
 325         return c;
 326 }
 327
 328 struct carg    *
 329 addarg(struct cargs * _args, int ch, char *argstr)
 330 {
 331         struct carg    *ca = malloc(sizeof(struct carg));
 332
 333         if (ca == NULL)
 334                 cmderr(EX_OSERR, "Abort - out of memory\n");
 335         ca->ch = ch;
 336         ca->val = argstr;
 337         LIST_INSERT_HEAD(_args, ca, list);
 338         return ca;
 339 }