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", NULL};
  40 const char     *Which[] = {"user", "group", NULL};
  41 static const char *Combo1[] = {"useradd", "userdel", "usermod", "usershow",
  42         "groupadd", "groupdel", "groupmod", "groupshow",
  43 NULL};
  44 static const char *Combo2[] = {"adduser", "deluser", "moduser", "showuser",
  45         "addgroup", "delgroup", "modgroup", "showgroup",
  46 NULL};
  47
  48 static struct cargs arglist;
  49
  50 static int      getindex(const char *words[], const char *word);
  51 static void     cmdhelp(int mode, int which);
  52
  53
  54 int
  55 main(int argc, char *argv[])
  56 {
  57         int             ch;
  58         int             mode = -1;
  59         int             which = -1;
  60         struct userconf *cnf;
  61
  62         static const char *opts[W_NUM][M_NUM] =
  63         {
  64          /* user */ {"C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db", "C:qn:u:r", "C:qn:u:c:d:e:p:g:G:mk:s:L:h:F", "C:qn:u:Fpa"},
  65          /* grp  */ {"C:qn:g:h:p", "C:qn:g:", "C:qn:g:l:h:F", "C:qn:g:Fpa"}
  66         };
  67
  68         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
  69         {                       /* Request handlers */
  70                 pw_user,
  71                 pw_group
  72         };
  73
  74         umask(0);               /* We wish to handle this manually */
  75         progname = strrchr(argv[0], '/');
  76         if (progname != NULL)
  77                 ++progname;
  78         else
  79                 progname = argv[0];
  80
  81         LIST_INIT(&arglist);
  82
  83         /*
  84          * Break off the first couple of words to determine what exactly
  85          * we're being asked to do
  86          */
  87         while (argc > 1 && *argv[1] != '-') {
  88                 int             tmp;
  89
  90                 if ((tmp = getindex(Modes, argv[1])) != -1)
  91                         mode = tmp;
  92                 else if ((tmp = getindex(Which, argv[1])) != -1)
  93                         which = tmp;
  94                 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
  95                         which = tmp / M_NUM;
  96                         mode = tmp % M_NUM;
  97                 } else if (strcmp(argv[1], "help") == 0)
  98                         cmdhelp(mode, which);
  99                 else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
 100                         addarg(&arglist, 'n', argv[1]);
 101                 else
 102                         cmderr(X_CMDERR, "Unknown keyword `%s'\n", argv[1]);
 103                 ++argv;
 104                 --argc;
 105         }
 106
 107         /*
 108          * Bail out unless the user is specific!
 109          */
 110         if (mode == -1 || which == -1)
 111                 cmdhelp(mode, which);
 112
 113         /*
 114          * Must be root to attempt an update
 115          */
 116         if (getuid() != 0 && mode != M_PRINT)
 117                 cmderr(X_PERMERR, "you must be root to run this program\n");
 118
 119         /*
 120          * We know which mode we're in and what we're about to do, so now
 121          * let's dispatch the remaining command line args in a genric way.
 122          */
 123         argv[0] = progname;     /* Preserve this */
 124         optarg = NULL;
 125
 126         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 127                 if (ch == '?')
 128                         cmderr(X_CMDERR, NULL);
 129                 else
 130                         addarg(&arglist, ch, optarg);
 131                 optarg = NULL;
 132         }
 133
 134         /*
 135          * We should immediately look for the -q 'quiet' switch so that we
 136          * don't bother with extraneous errors
 137          */
 138         if (getarg(&arglist, 'q') != NULL)
 139                 freopen("/dev/null", "w", stderr);
 140
 141         ch = X_CMDERR;
 142
 143         /*
 144          * Now, let's do the common initialisation
 145          */
 146         cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
 147
 148         if (funcs[which])
 149                 ch = funcs[which] (cnf, mode, &arglist);
 150         else
 151                 fprintf(stderr, "%s: %s[%s] not yet implemented.\n", progname, Which[which], Modes[mode]);
 152
 153         return ch;
 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] [ help | switches/values ]\n", progname);
 201         else if (mode == -1)
 202                 fprintf(stderr, "usage: %s %s [add|del|mod] [ 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                                 "  Setting defaults:\n"
 229                                 "\t-D             set user defaults\n"
 230                                 "\t-b dir         default home root dir\n"
 231                                 "\t-e period      default expiry period\n"
 232                                 "\t-p period      default password change period\n"
 233                                 "\t-g group       default group\n"
 234                                 "\t-G grp1,grp2   additional groups\n"
 235                                 "\t-L class       default user class\n"
 236                                 "\t-k dir         default home skeleton\n"
 237                                 "\t-u min,max     set min,max uids\n"
 238                                 "\t-i min,max     set min,max gids\n"
 239                                 "\t-w method      set default password method\n"
 240                                 "\t-s shell       default shell\n",
 241                                 "usage: %s userdel [uid|name] [switches]\n"
 242                                 "\t-n name        login name\n"
 243                                 "\t-u uid         user id\n"
 244                                 "\t-r             remove home & contents\n",
 245                                 "usage: %s usermod [uid|name] [switches]\n"
 246                                 "\t-C config      configuration file\n"
 247                                 "\t-q             quiet operation\n"
 248                                 "\t-F             force add if no user\n"
 249                                 "\t-n name        login name\n"
 250                                 "\t-u uid         user id\n"
 251                                 "\t-c comment     user name/comment\n"
 252                                 "\t-d directory   home directory\n"
 253                                 "\t-e date        account expiry date\n"
 254                                 "\t-p date        password expiry date\n"
 255                                 "\t-g grp         initial group\n"
 256                                 "\t-G grp1,grp2   additional groups\n"
 257                                 "\t-l name        new login name\n"
 258                                 "\t-L class       user class\n"
 259                                 "\t-m [ -k dir ]  create and set up home\n"
 260                                 "\t-s shell       name of login shell\n"
 261                                 "\t-h fd          read password on fd\n",
 262                                 "usage: %s usershow [uid|name] [switches]\n"
 263                                 "\t-n name        login name\n"
 264                                 "\t-u uid         user id\n"
 265                                 "\t-F             force print\n"
 266                                 "\t-p             prettier format\n"
 267                                 "\t-a             print all users\n"
 268                         },
 269                         {
 270                                 "usage: %s groupadd [group|gid] [switches]\n"
 271                                 "\t-C config      configuration file\n"
 272                                 "\t-q             quiet operation\n"
 273                                 "\t-n group       group name\n"
 274                                 "\t-g gid         group id\n"
 275                                 "\t-o             duplicate gid ok\n",
 276                                 "usage: %s groupdel [group|gid] [switches]\n"
 277                                 "\t-n name        group name\n"
 278                                 "\t-g gid         group id\n",
 279                                 "usage: %s groupmod [group|gid] [switches]\n"
 280                                 "\t-C config      configuration file\n"
 281                                 "\t-q             quiet operation\n"
 282                                 "\t-F             force add if not exists\n"
 283                                 "\t-n name        group name\n"
 284                                 "\t-g gid         group id\n"
 285                                 "\t-l name        new group name\n",
 286                                 "usage: %s groupshow [group|gid] [switches]\n"
 287                                 "\t-n name        group name\n"
 288                                 "\t-g gid         group id\n"
 289                                 "\t-F             force print\n"
 290                                 "\t-p             prettier format\n"
 291                                 "\t-a             print all accounting groups\n"
 292                         }
 293                 };
 294
 295                 fprintf(stderr, help[which][mode], progname);
 296         }
 297         exit(X_CMDERR);
 298 }
 299
 300 struct carg    *
 301 getarg(struct cargs * _args, int ch)
 302 {
 303         struct carg    *c = _args->lh_first;
 304
 305         while (c != NULL && c->ch != ch)
 306                 c = c->list.le_next;
 307         return c;
 308 }
 309
 310 struct carg    *
 311 addarg(struct cargs * _args, int ch, char *argstr)
 312 {
 313         struct carg    *ca = malloc(sizeof(struct carg));
 314
 315         if (ca == NULL)
 316                 cmderr(X_MEMERR, "Abort - out of memory\n");
 317         ca->ch = ch;
 318         ca->val = argstr;
 319         LIST_INSERT_HEAD(_args, ca, list);
 320         return ca;
 321 }