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  *      $Id: pw.c,v 1.1.1.2 1996/12/09 23:55:20 joerg Exp $
  27  */
  28
  29 #include "pw.h"
  30
  31 static char    *progname = "pw";
  32
  33 const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
  34 const char     *Which[] = {"user", "group", NULL};
  35 static const char *Combo1[] = {
  36   "useradd", "userdel", "usermod", "usershow", "usernext",
  37   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  38   NULL};
  39 static const char *Combo2[] = {
  40   "adduser", "deluser", "moduser", "showuser", "nextuser",
  41   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  42 NULL};
  43
  44 static struct cargs arglist;
  45
  46 static int      getindex(const char *words[], const char *word);
  47 static void     cmdhelp(int mode, int which);
  48
  49
  50 int
  51 main(int argc, char *argv[])
  52 {
  53         int             ch;
  54         int             mode = -1;
  55         int             which = -1;
  56         struct userconf *cnf;
  57
  58         static const char *opts[W_NUM][M_NUM] =
  59         {
  60                 { /* user */
  61                         "C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NP",
  62                         "C:qn:u:r",
  63                         "C:qn:u:c:d:e:p:g:G:mk:s:w:L:h:FNP",
  64                         "C:qn:u:FPa",
  65                         "C:q"
  66                 },
  67                 { /* grp  */
  68                         "C:qn:g:h:M:pNP",
  69                         "C:qn:g:",
  70                         "C:qn:g:l:h:FM:m:NP",
  71                         "C:qn:g:FPa",
  72                         "C:q"
  73                  }
  74         };
  75
  76         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
  77         {                       /* Request handlers */
  78                 pw_user,
  79                 pw_group
  80         };
  81
  82         umask(0);               /* We wish to handle this manually */
  83         progname = strrchr(argv[0], '/');
  84         if (progname != NULL)
  85                 ++progname;
  86         else
  87                 progname = argv[0];
  88
  89         LIST_INIT(&arglist);
  90
  91         /*
  92          * Break off the first couple of words to determine what exactly
  93          * we're being asked to do
  94          */
  95         while (argc > 1 && *argv[1] != '-') {
  96                 int             tmp;
  97
  98                 if ((tmp = getindex(Modes, argv[1])) != -1)
  99                         mode = tmp;
 100                 else if ((tmp = getindex(Which, argv[1])) != -1)
 101                         which = tmp;
 102                 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
 103                         which = tmp / M_NUM;
 104                         mode = tmp % M_NUM;
 105                 } else if (strcmp(argv[1], "help") == 0)
 106                         cmdhelp(mode, which);
 107                 else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
 108                         addarg(&arglist, 'n', argv[1]);
 109                 else
 110                         cmderr(EX_USAGE, "Unknown keyword `%s'\n", argv[1]);
 111                 ++argv;
 112                 --argc;
 113         }
 114
 115         /*
 116          * Bail out unless the user is specific!
 117          */
 118         if (mode == -1 || which == -1)
 119                 cmdhelp(mode, which);
 120
 121         /*
 122          * We know which mode we're in and what we're about to do, so now
 123          * let's dispatch the remaining command line args in a genric way.
 124          */
 125         argv[0] = progname;     /* Preserve this */
 126         optarg = NULL;
 127
 128         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 129                 if (ch == '?')
 130                         cmderr(EX_USAGE, NULL);
 131                 else
 132                         addarg(&arglist, ch, optarg);
 133                 optarg = NULL;
 134         }
 135
 136         /*
 137          * Must be root to attempt an update
 138          */
 139         if (getuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
 140                 cmderr(EX_NOPERM, "you must be root to run this program\n");
 141
 142         /*
 143          * We should immediately look for the -q 'quiet' switch so that we
 144          * don't bother with extraneous errors
 145          */
 146         if (getarg(&arglist, 'q') != NULL)
 147                 freopen("/dev/null", "w", stderr);
 148
 149         /*
 150          * Now, let's do the common initialisation
 151          */
 152         cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
 153         return funcs[which] (cnf, mode, &arglist);
 154 }
 155
 156 static int
 157 getindex(const char *words[], const char *word)
 158 {
 159         int             i = 0;
 160
 161         while (words[i]) {
 162                 if (strcmp(words[i], word) == 0)
 163                         return i;
 164                 i++;
 165         }
 166         return -1;
 167 }
 168
 169
 170 /*
 171  * This is probably an overkill for a cmdline help system, but it reflects
 172  * the complexity of the command line.
 173  */
 174
 175 static void
 176 banner(void)
 177 {
 178         fprintf(stderr, "%s: ", progname);
 179 }
 180
 181 void
 182 cmderr(int ec, char const * fmt,...)
 183 {
 184         if (fmt != NULL) {
 185                 va_list         argp;
 186
 187                 banner();
 188                 va_start(argp, fmt);
 189                 vfprintf(stderr, fmt, argp);
 190                 va_end(argp);
 191         }
 192         exit(ec);
 193 }
 194
 195 static void
 196 cmdhelp(int mode, int which)
 197 {
 198         banner();
 199         if (which == -1)
 200                 fprintf(stderr, "usage: %s [user|group] [add|del|mod|show|next] [ help | switches/values ]\n", progname);
 201         else if (mode == -1)
 202                 fprintf(stderr, "usage: %s %s [add|del|mod|show|next] [ help | switches/values ]\n", progname, Which[which]);
 203         else {
 204
 205                 /*
 206                  * We need to give mode specific help
 207                  */
 208                 static const char *help[W_NUM][M_NUM] =
 209                 {
 210                         {
 211                                 "usage: %s useradd [name] [switches]\n"
 212                                 "\t-C config      configuration file\n"
 213                                 "\t-q             quiet operation\n"
 214                                 "  Adding users:\n"
 215                                 "\t-n name        login name\n"
 216                                 "\t-u uid         user id\n"
 217                                 "\t-c comment     user name/comment\n"
 218                                 "\t-d directory   home directory\n"
 219                                 "\t-e date        account expiry date\n"
 220                                 "\t-p date        password expiry date\n"
 221                                 "\t-g grp         initial group\n"
 222                                 "\t-G grp1,grp2   additional groups\n"
 223                                 "\t-m [ -k dir ]  create and set up home\n"
 224                                 "\t-s shell       name of login shell\n"
 225                                 "\t-o             duplicate uid ok\n"
 226                                 "\t-L class       user class\n"
 227                                 "\t-h fd          read password on fd\n"
 228                                 "\t-N             no update\n"
 229                                 "  Setting defaults:\n"
 230                                 "\t-D             set user defaults\n"
 231                                 "\t-b dir         default home root dir\n"
 232                                 "\t-e period      default expiry period\n"
 233                                 "\t-p period      default password change period\n"
 234                                 "\t-g group       default group\n"
 235                                 "\t-G grp1,grp2   additional groups\n"
 236                                 "\t-L class       default user class\n"
 237                                 "\t-k dir         default home skeleton\n"
 238                                 "\t-u min,max     set min,max uids\n"
 239                                 "\t-i min,max     set min,max gids\n"
 240                                 "\t-w method      set default password method\n"
 241                                 "\t-s shell       default shell\n",
 242                                 "usage: %s userdel [uid|name] [switches]\n"
 243                                 "\t-n name        login name\n"
 244                                 "\t-u uid         user id\n"
 245                                 "\t-r             remove home & contents\n",
 246                                 "usage: %s usermod [uid|name] [switches]\n"
 247                                 "\t-C config      configuration file\n"
 248                                 "\t-q             quiet operation\n"
 249                                 "\t-F             force add if no user\n"
 250                                 "\t-n name        login name\n"
 251                                 "\t-u uid         user id\n"
 252                                 "\t-c comment     user name/comment\n"
 253                                 "\t-d directory   home directory\n"
 254                                 "\t-e date        account expiry date\n"
 255                                 "\t-p date        password expiry date\n"
 256                                 "\t-g grp         initial group\n"
 257                                 "\t-G grp1,grp2   additional groups\n"
 258                                 "\t-l name        new login name\n"
 259                                 "\t-L class       user class\n"
 260                                 "\t-m [ -k dir ]  create and set up home\n"
 261                                 "\t-s shell       name of login shell\n"
 262                                 "\t-w method      set new password using method\n"
 263                                 "\t-h fd          read password on fd\n"
 264                                 "\t-N             no update\n",
 265                                 "usage: %s usershow [uid|name] [switches]\n"
 266                                 "\t-n name        login name\n"
 267                                 "\t-u uid         user id\n"
 268                                 "\t-F             force print\n"
 269                                 "\t-P             prettier format\n"
 270                                 "\t-a             print all users\n",
 271                                 "usage: %s usernext [switches]\n"
 272                                 "\t-C config      configuration file\n"
 273                         },
 274                         {
 275                                 "usage: %s groupadd [group|gid] [switches]\n"
 276                                 "\t-C config      configuration file\n"
 277                                 "\t-q             quiet operation\n"
 278                                 "\t-n group       group name\n"
 279                                 "\t-g gid         group id\n"
 280                                 "\t-M usr1,usr2   add users as group members\n"
 281                                 "\t-o             duplicate gid ok\n"
 282                                 "\t-N             no update\n",
 283                                 "usage: %s groupdel [group|gid] [switches]\n"
 284                                 "\t-n name        group name\n"
 285                                 "\t-g gid         group id\n",
 286                                 "usage: %s groupmod [group|gid] [switches]\n"
 287                                 "\t-C config      configuration file\n"
 288                                 "\t-q             quiet operation\n"
 289                                 "\t-F             force add if not exists\n"
 290                                 "\t-n name        group name\n"
 291                                 "\t-g gid         group id\n"
 292                                 "\t-M usr1,usr2   replaces users as group members\n"
 293                                 "\t-m usr1,usr2   add users as group members\n"
 294                                 "\t-l name        new group name\n"
 295                                 "\t-N             no update\n",
 296                                 "usage: %s groupshow [group|gid] [switches]\n"
 297                                 "\t-n name        group name\n"
 298                                 "\t-g gid         group id\n"
 299                                 "\t-F             force print\n"
 300                                 "\t-P             prettier format\n"
 301                                 "\t-a             print all accounting groups\n",
 302                                 "usage: %s groupnext [switches]\n"
 303                                 "\t-C config      configuration file\n"
 304                         }
 305                 };
 306
 307                 fprintf(stderr, help[which][mode], progname);
 308         }
 309         exit(EXIT_FAILURE);
 310 }
 311
 312 struct carg    *
 313 getarg(struct cargs * _args, int ch)
 314 {
 315         struct carg    *c = _args->lh_first;
 316
 317         while (c != NULL && c->ch != ch)
 318                 c = c->list.le_next;
 319         return c;
 320 }
 321
 322 struct carg    *
 323 addarg(struct cargs * _args, int ch, char *argstr)
 324 {
 325         struct carg    *ca = malloc(sizeof(struct carg));
 326
 327         if (ca == NULL)
 328                 cmderr(EX_OSERR, "Abort - out of memory\n");
 329         ca->ch = ch;
 330         ca->val = argstr;
 331         LIST_INSERT_HEAD(_args, ca, list);
 332         return ca;
 333 }