/* $NetBSD: main.c,v 1.5 2006/10/22 21:16:58 christos Exp $ */

/*
* Copyright (c) 1999 Alistair G. Crooks.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
*    products derived from this software without specific prior written
*    permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "usermgmt.h"

enum {
       MaxCmdWords = 2
};

/* this struct describes a command */
typedef struct cmd_t {
       int             c_wc;                           /* word count */
       const char      *c_word[MaxCmdWords];           /* command words */
       int             (*c_func)(int, char **);        /* called function */
} cmd_t;

/* despatch table for commands */
static cmd_t    cmds[] = {
       {       1,      { "useradd",    NULL },         useradd         },
       {       2,      { "user",       "add" },        useradd         },
       {       1,      { "usermod",    NULL },         usermod         },
       {       2,      { "user",       "mod" },        usermod         },
       {       1,      { "userdel",    NULL },         userdel         },
       {       2,      { "user",       "del" },        userdel         },
#ifdef EXTENSIONS
       {       1,      { "userinfo",   NULL },         userinfo        },
       {       2,      { "user",       "info" },       userinfo        },
#endif
       {       1,      { "groupadd",   NULL },         groupadd        },
       {       2,      { "group",      "add" },        groupadd        },
       {       1,      { "groupmod",   NULL },         groupmod        },
       {       2,      { "group",      "mod" },        groupmod        },
       {       1,      { "groupdel",   NULL },         groupdel        },
       {       2,      { "group",      "del" },        groupdel        },
#ifdef EXTENSIONS
       {       1,      { "groupinfo",  NULL },         groupinfo       },
       {       2,      { "group",      "info" },       groupinfo       },
#endif
       {       .c_wc = 0       }
};

int
main(int argc, char **argv)
{
       cmd_t   *cmdp;
       int     matched;
       int     i;

       for (cmdp = cmds ; cmdp->c_wc > 0 ; cmdp++) {
               for (matched = i = 0 ; i < cmdp->c_wc && i < MaxCmdWords ; i++) {
                       if (argc > i) {
                               if (strcmp((i == 0) ? getprogname() : argv[i],
                                               cmdp->c_word[i]) == 0) {
                                       matched += 1;
                               } else {
                                       break;
                               }
                       }
               }
               if (matched == cmdp->c_wc) {
                       return (*cmdp->c_func)(argc - (matched - 1), argv + (matched - 1));
               }
       }
       usermgmt_usage(getprogname());
       errx(EXIT_FAILURE, "Program `%s' not recognised", getprogname());
       /* NOTREACHED */
}