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/*
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
*
* Copyright (c) 2001-2014 ircd-hybrid development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
/*! \file getopt.c
* \brief Uses getopt to fetch the command line options.
* \version $Id$
*/
#include "stdinc.h"
#include "ircd_getopt.h"
#define OPTCHAR '-'
static void
usage(const char *name, const struct lgetopt *opts)
{
unsigned int i;
fprintf(stderr, "Usage: %s [options]\n", name);
fprintf(stderr, "Where valid options are:\n");
for (i = 0; opts[i].opt; ++i)
fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR, opts[i].opt,
(opts[i].argtype == YESNO || opts[i].argtype == USAGE) ? "" :
opts[i].argtype == INTEGER ? "<number>" : "<string>",
opts[i].desc);
exit(EXIT_FAILURE);
}
void
parseargs(int *argc, char ***argv, struct lgetopt *opts)
{
unsigned int i;
const char *progname = (*argv)[0];
/* loop through each argument */
while (1)
{
int found = 0;
(*argc)--;
(*argv)++;
if (*argc < 1 || (*argv)[0][0] != OPTCHAR)
return;
(*argv)[0]++;
/* search through our argument list, and see if it matches */
for (i = 0; opts[i].opt; i++)
{
if (!strcmp(opts[i].opt, (*argv)[0]))
{
/* found our argument */
found = 1;
switch (opts[i].argtype)
{
case YESNO:
*((int *)opts[i].argloc) = 1;
break;
case INTEGER:
if (*argc < 2)
{
fprintf(stderr, "Error: option '%c%s' requires an argument\n",
OPTCHAR, opts[i].opt);
usage((*argv)[0], opts);
}
*((int *)opts[i].argloc) = atoi((*argv)[1]);
(*argc)--;
(*argv)++;
break;
case STRING:
if (*argc < 2)
{
fprintf(stderr, "error: option '%c%s' requires an argument\n",
OPTCHAR, opts[i].opt);
usage(progname, opts);
}
*((char**)opts[i].argloc) = malloc(strlen((*argv)[1]) + 1);
strcpy(*((char**)opts[i].argloc), (*argv)[1]);
(*argc)--;
(*argv)++;
break;
case USAGE:
usage(progname, opts);
/* NOTREACHED */
default:
fprintf(stderr, "Error: internal error in parseargs() at %s:%d\n",
__FILE__, __LINE__);
exit(EXIT_FAILURE);
}
}
}
if (!found)
{
fprintf(stderr, "error: unknown argument '%c%s'\n",
OPTCHAR, (*argv)[0]);
usage(progname, opts);
}
}
}
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