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#include <stdio.h>
#include <string.h>
#include "ext.h"
#define ERR(str, chr) if(opterr){fprintf(stderr, "%s%s%c\n", argv[0], str, chr);}
int opterr = 1;
int optind = 1;
int optopt;
char *optarg;
int
getopt (int argc, char **argv, char *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) {
ERR (": illegal option -- ", 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) {
ERR (": option requires an argument -- ", c);
sp = 1;
return '?';
} else
optarg = argv[optind++];
sp = 1;
} else {
if (argv[optind][++sp] == '\0') {
sp = 1;
optind++;
}
optarg = NULL;
}
return c;
}
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