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  *      $FreeBSD$
  27  */
  28
  29 #include "pw.h"
  30 #include <paths.h>
  31 #include <sys/wait.h>
  32
  33 static char    *progname = "pw";
  34
  35 const char     *Modes[] = {"add", "del", "mod", "show", "next", NULL};
  36 const char     *Which[] = {"user", "group", NULL};
  37 static const char *Combo1[] = {
  38   "useradd", "userdel", "usermod", "usershow", "usernext",
  39   "groupadd", "groupdel", "groupmod", "groupshow", "groupnext",
  40   NULL};
  41 static const char *Combo2[] = {
  42   "adduser", "deluser", "moduser", "showuser", "nextuser",
  43   "addgroup", "delgroup", "modgroup", "showgroup", "nextgroup",
  44 NULL};
  45
  46 static struct cargs arglist;
  47
  48 static int      getindex(const char *words[], const char *word);
  49 static void     cmdhelp(int mode, int which);
  50
  51
  52 int
  53 main(int argc, char *argv[])
  54 {
  55         int             ch;
  56         int             mode = -1;
  57         int             which = -1;
  58         struct userconf *cnf;
  59
  60         static const char *opts[W_NUM][M_NUM] =
  61         {
  62                 { /* user */
  63                         "C:qn:u:c:d:e:p:g:G:mk:s:oL:i:w:h:Db:NPy:Y",
  64                         "C:qn:u:rY",
  65                         "C:qn:u:c:d:e:p:g:G:ml:k:s:w:L:h:FNPY",
  66                         "C:qn:u:FPa",
  67                         "C:q"
  68                 },
  69                 { /* grp  */
  70                         "C:qn:g:h:M:pNPY",
  71                         "C:qn:g:Y",
  72                         "C:qn:g:l:h:FM:m:NPY",
  73                         "C:qn:g:FPa",
  74                         "C:q"
  75                  }
  76         };
  77
  78         static int      (*funcs[W_NUM]) (struct userconf * _cnf, int _mode, struct cargs * _args) =
  79         {                       /* Request handlers */
  80                 pw_user,
  81                 pw_group
  82         };
  83
  84         umask(0);               /* We wish to handle this manually */
  85         progname = strrchr(argv[0], '/');
  86         if (progname != NULL)
  87                 ++progname;
  88         else
  89                 progname = argv[0];
  90
  91         LIST_INIT(&arglist);
  92
  93         /*
  94          * Break off the first couple of words to determine what exactly
  95          * we're being asked to do
  96          */
  97         while (argc > 1 && *argv[1] != '-') {
  98                 int             tmp;
  99
 100                 if ((tmp = getindex(Modes, argv[1])) != -1)
 101                         mode = tmp;
 102                 else if ((tmp = getindex(Which, argv[1])) != -1)
 103                         which = tmp;
 104                 else if ((tmp = getindex(Combo1, argv[1])) != -1 || (tmp = getindex(Combo2, argv[1])) != -1) {
 105                         which = tmp / M_NUM;
 106                         mode = tmp % M_NUM;
 107                 } else if (strcmp(argv[1], "help") == 0)
 108                         cmdhelp(mode, which);
 109                 else if (which != -1 && mode != -1 && arglist.lh_first == NULL)
 110                         addarg(&arglist, 'n', argv[1]);
 111                 else
 112                         cmderr(EX_USAGE, "Unknown keyword `%s'\n", argv[1]);
 113                 ++argv;
 114                 --argc;
 115         }
 116
 117         /*
 118          * Bail out unless the user is specific!
 119          */
 120         if (mode == -1 || which == -1)
 121                 cmdhelp(mode, which);
 122
 123         /*
 124          * We know which mode we're in and what we're about to do, so now
 125          * let's dispatch the remaining command line args in a genric way.
 126          */
 127         argv[0] = progname;     /* Preserve this */
 128         optarg = NULL;
 129
 130         while ((ch = getopt(argc, argv, opts[which][mode])) != -1) {
 131                 if (ch == '?')
 132                         cmderr(EX_USAGE, NULL);
 133                 else
 134                         addarg(&arglist, ch, optarg);
 135                 optarg = NULL;
 136         }
 137
 138         /*
 139          * Must be root to attempt an update
 140          */
 141         if (getuid() != 0 && mode != M_PRINT && mode != M_NEXT && getarg(&arglist, 'N')==NULL)
 142                 cmderr(EX_NOPERM, "you must be root to run this program\n");
 143
 144         /*
 145          * We should immediately look for the -q 'quiet' switch so that we
 146          * don't bother with extraneous errors
 147          */
 148         if (getarg(&arglist, 'q') != NULL)
 149                 freopen("/dev/null", "w", stderr);
 150
 151         /*
 152          * Now, let's do the common initialisation
 153          */
 154         cnf = read_userconfig(getarg(&arglist, 'C') ? getarg(&arglist, 'C')->val : NULL);
 155         ch = funcs[which] (cnf, mode, &arglist);
 156
 157         /*
 158          * If everything went ok, and we've been asked to update
 159          * the NIS maps, then do it now
 160          */
 161         if (ch == EXIT_SUCCESS && getarg(&arglist, 'Y') != NULL) {
 162                 pid_t   pid;
 163
 164                 fflush(NULL);
 165                 if (chdir(_PATH_YP) == -1)
 166                         perror("chdir(" _PATH_YP ")");
 167                 else if ((pid = fork()) == -1)
 168                         perror("fork()");
 169                 else if (pid == 0) {
 170                         /* Is make anywhere else? */
 171                         execlp("/usr/bin/make", "make", NULL);
 172                         _exit(1);
 173                 } else {
 174                         int   i;
 175                         waitpid(pid, &i, 0);
 176                         if ((i = WEXITSTATUS(i)) != 0)
 177                                 cmderr(ch, "warning: make exited with status %d\n", i);
 178                         else
 179                                 pw_log(cnf, mode, which, "NIS maps updated");
 180                 }
 181         }
 182         return ch;
 183 }
 184
 185 static int
 186 getindex(const char *words[], const char *word)
 187 {
 188         int             i = 0;
 189
 190         while (words[i]) {
 191                 if (strcmp(words[i], word) == 0)
 192                         return i;
 193                 i++;
 194         }
 195         return -1;
 196 }
 197
 198
 199 /*
 200  * This is probably an overkill for a cmdline help system, but it reflects
 201  * the complexity of the command line.
 202  */
 203
 204 static void
 205 banner(void)
 206 {
 207         fprintf(stderr, "%s: ", progname);
 208 }
 209
 210 void
 211 cmderr(int ec, char const * fmt,...)
 212 {
 213         if (fmt != NULL) {
 214                 va_list         argp;
 215
 216                 banner();
 217                 va_start(argp, fmt);
 218                 vfprintf(stderr, fmt, argp);
 219                 va_end(argp);
 220         }
 221         exit(ec);
 222 }
 223
 224 static void
 225 cmdhelp(int mode, int which)
 226 {
 227         banner();
 228         if (which == -1)
 229                 fprintf(stderr, "usage: %s [user|group] [add|del|mod|show|next] [ help | switches/values ]\n", progname);
 230         else if (mode == -1)
 231                 fprintf(stderr, "usage: %s %s [add|del|mod|show|next] [ help | switches/values ]\n", progname, Which[which]);
 232         else {
 233
 234                 /*
 235                  * We need to give mode specific help
 236                  */
 237                 static const char *help[W_NUM][M_NUM] =
 238                 {
 239                         {
 240                                 "usage: %s useradd [name] [switches]\n"
 241                                 "\t-C config      configuration file\n"
 242                                 "\t-q             quiet operation\n"
 243                                 "  Adding users:\n"
 244                                 "\t-n name        login name\n"
 245                                 "\t-u uid         user id\n"
 246                                 "\t-c comment     user name/comment\n"
 247                                 "\t-d directory   home directory\n"
 248                                 "\t-e date        account expiry date\n"
 249                                 "\t-p date        password expiry date\n"
 250                                 "\t-g grp         initial group\n"
 251                                 "\t-G grp1,grp2   additional groups\n"
 252                                 "\t-m [ -k dir ]  create and set up home\n"
 253                                 "\t-s shell       name of login shell\n"
 254                                 "\t-o             duplicate uid ok\n"
 255                                 "\t-L class       user class\n"
 256                                 "\t-h fd          read password on fd\n"
 257                                 "\t-Y             update NIS maps\n"
 258                                 "\t-N             no update\n"
 259                                 "  Setting defaults:\n"
 260                                 "\t-D             set user defaults\n"
 261                                 "\t-b dir         default home root dir\n"
 262                                 "\t-e period      default expiry period\n"
 263                                 "\t-p period      default password change period\n"
 264                                 "\t-g group       default group\n"
 265                                 "\t-G grp1,grp2   additional groups\n"
 266                                 "\t-L class       default user class\n"
 267                                 "\t-k dir         default home skeleton\n"
 268                                 "\t-u min,max     set min,max uids\n"
 269                                 "\t-i min,max     set min,max gids\n"
 270                                 "\t-w method      set default password method\n"
 271                                 "\t-s shell       default shell\n"
 272                                 "\t-y path        set NIS passwd file path\n",
 273                                 "usage: %s userdel [uid|name] [switches]\n"
 274                                 "\t-n name        login name\n"
 275                                 "\t-u uid         user id\n"
 276                                 "\t-Y             update NIS maps\n"
 277                                 "\t-r             remove home & contents\n",
 278                                 "usage: %s usermod [uid|name] [switches]\n"
 279                                 "\t-C config      configuration file\n"
 280                                 "\t-q             quiet operation\n"
 281                                 "\t-F             force add if no user\n"
 282                                 "\t-n name        login name\n"
 283                                 "\t-u uid         user id\n"
 284                                 "\t-c comment     user name/comment\n"
 285                                 "\t-d directory   home directory\n"
 286                                 "\t-e date        account expiry date\n"
 287                                 "\t-p date        password expiry date\n"
 288                                 "\t-g grp         initial group\n"
 289                                 "\t-G grp1,grp2   additional groups\n"
 290                                 "\t-l name        new login name\n"
 291                                 "\t-L class       user class\n"
 292                                 "\t-m [ -k dir ]  create and set up home\n"
 293                                 "\t-s shell       name of login shell\n"
 294                                 "\t-w method      set new password using method\n"
 295                                 "\t-h fd          read password on fd\n"
 296                                 "\t-Y             update NIS maps\n"
 297                                 "\t-N             no update\n",
 298                                 "usage: %s usershow [uid|name] [switches]\n"
 299                                 "\t-n name        login name\n"
 300                                 "\t-u uid         user id\n"
 301                                 "\t-F             force print\n"
 302                                 "\t-P             prettier format\n"
 303                                 "\t-a             print all users\n",
 304                                 "usage: %s usernext [switches]\n"
 305                                 "\t-C config      configuration file\n"
 306                         },
 307                         {
 308                                 "usage: %s groupadd [group|gid] [switches]\n"
 309                                 "\t-C config      configuration file\n"
 310                                 "\t-q             quiet operation\n"
 311                                 "\t-n group       group name\n"
 312                                 "\t-g gid         group id\n"
 313                                 "\t-M usr1,usr2   add users as group members\n"
 314                                 "\t-o             duplicate gid ok\n"
 315                                 "\t-Y             update NIS maps\n"
 316                                 "\t-N             no update\n",
 317                                 "usage: %s groupdel [group|gid] [switches]\n"
 318                                 "\t-n name        group name\n"
 319                                 "\t-g gid         group id\n"
 320                                 "\t-Y             update NIS maps\n",
 321                                 "usage: %s groupmod [group|gid] [switches]\n"
 322                                 "\t-C config      configuration file\n"
 323                                 "\t-q             quiet operation\n"
 324                                 "\t-F             force add if not exists\n"
 325                                 "\t-n name        group name\n"
 326                                 "\t-g gid         group id\n"
 327                                 "\t-M usr1,usr2   replaces users as group members\n"
 328                                 "\t-m usr1,usr2   add users as group members\n"
 329                                 "\t-l name        new group name\n"
 330                                 "\t-Y             update NIS maps\n"
 331                                 "\t-N             no update\n",
 332                                 "usage: %s groupshow [group|gid] [switches]\n"
 333                                 "\t-n name        group name\n"
 334                                 "\t-g gid         group id\n"
 335                                 "\t-F             force print\n"
 336                                 "\t-P             prettier format\n"
 337                                 "\t-a             print all accounting groups\n",
 338                                 "usage: %s groupnext [switches]\n"
 339                                 "\t-C config      configuration file\n"
 340                         }
 341                 };
 342
 343                 fprintf(stderr, help[which][mode], progname);
 344         }
 345         exit(EXIT_FAILURE);
 346 }
 347
 348 struct carg    *
 349 getarg(struct cargs * _args, int ch)
 350 {
 351         struct carg    *c = _args->lh_first;
 352
 353         while (c != NULL && c->ch != ch)
 354                 c = c->list.le_next;
 355         return c;
 356 }
 357
 358 struct carg    *
 359 addarg(struct cargs * _args, int ch, char *argstr)
 360 {
 361         struct carg    *ca = malloc(sizeof(struct carg));
 362
 363         if (ca == NULL)
 364                 cmderr(EX_OSERR, "Abort - out of memory\n");
 365         ca->ch = ch;
 366         ca->val = argstr;
 367         LIST_INSERT_HEAD(_args, ca, list);
 368         return ca;
 369 }