/* @(#)getopt
* parse command options
* originally from comp.sources.unix/volume3/att_getopt
* BKi 1993/07/04
*/
/*
* int getopt PROTO((int argc, char **argv, char *opts));
* argc: number of parameters passed
* argv[]: parameter string
* opts: string of allowed parameters,
* followed by ':' if argument required
* return option (or EOF)
* (option argument in: char *optarg)
*
* global: char *optarg: argument
* int optind: number of argument
* int optopt
*
* extern int strcmp();
* extern char *strchr();
*/
#include "sys_def.h"
#include <string.h>
#ifndef EOF
#define EOF -1
#endif
#ifndef NULL
#define NULL 0L
#endif
int optind = 1;
int optopt;
char *optarg;
int
getopt(argc, argv, opts)
int argc;
char **argv, *opts;
{
static int sp = 1;
register int c;
register char *cp;
if (sp == 1)
if (optind >= argc ||
argv[optind][0] != '-' || argv[optind][1] == '\0')
return (EOF);
else if (strcmp(argv[optind], "--") == 0)
{
optind++;
return (EOF);
}
optopt = c = argv[optind][sp];
if (c == ':' || (cp = strchr(opts, c)) == NULL)
{
fprintf(stderr, "%c: illegal option -- \n", c);
if (argv[optind][++sp] == '\0')
{
optind++;
sp = 1;
}
return ('?');
}
if (*++cp == ':')
{
if (argv[optind][sp + 1] != '\0')
optarg = &argv[optind++][sp + 1];
else if (++optind >= argc)
{
fprintf(stderr, "%c: option requires an argument -- \n", c);
sp = 1;
return ('?');
} else
optarg = argv[optind++];
sp = 1;
} else
{
if (argv[optind][++sp] == '\0')
{
sp = 1;
optind++;
}
optarg = NULL;
}
return (c);
} /* getopt */
