solanum/ircd/getopt.c

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/*
* ircd-ratbox: A slightly useful ircd.
* getopt.c: Uses getopt to fetch the command line options.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox 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
*/
#include "stdinc.h"
#include "ircd_getopt.h"
# define OPTCHAR '-'
void
parseargs(int *argc, char * const **argv, struct lgetopt *opts)
{
int i;
const char *progname = (*argv)[0];
/* loop through each argument */
for (;;)
{
int found = 0;
(*argc)--;
(*argv)++;
if(*argc < 1)
{
return;
}
/* check if it *is* an arg.. */
if((*argv)[0][0] != OPTCHAR)
{
return;
}
/* search through our argument list, and see if it matches */
for (i = 0; opts[i].opt; i++)
{
if(!strcmp(opts[i].opt, &(*argv)[0][1]))
{
/* found our argument */
found = 1;
switch (opts[i].argtype)
{
case YESNO:
*((bool *) opts[i].argloc) = TRUE;
break;
case INTEGER:
if(*argc < 2)
{
fprintf(stderr,
"Error: option '%c%s' requires an argument\n",
OPTCHAR, opts[i].opt);
usage(progname);
}
*((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);
}
*((char **) opts[i].argloc) =
malloc(strlen((*argv)[1]) + 1);
strcpy(*((char **) opts[i].argloc), (*argv)[1]);
(*argc)--;
(*argv)++;
break;
case USAGE:
usage(progname);
/*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][1]);
usage(progname);
}
}
}
void
usage(const char *name)
{
int i = 0;
fprintf(stderr, "Usage: %s [options]\n", name);
fprintf(stderr, "Where valid options are:\n");
for (i = 0; myopts[i].opt; i++)
{
fprintf(stderr, "\t%c%-10s %-20s%s\n", OPTCHAR,
myopts[i].opt, (myopts[i].argtype == YESNO
|| myopts[i].argtype ==
USAGE) ? "" : myopts[i].argtype ==
INTEGER ? "<number>" : "<string>", myopts[i].desc);
}
exit(EXIT_FAILURE);
}