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#include "sys/types.h"
#include "string.h"
#include "stdio.h"
#include <unistd.h>
int getopt(int argc, char * const argv[], const char *optstring)
{
static int optchar = 0;
char *cursor = NULL;
if (optind == 0 || argv[optind][optchar] == '\0') {
optind++;
optchar = 0;
}
if (!strcmp(argv[optind], "--")) {
optind++;
return -1;
}
if (optchar == 0 && argv[optind][optchar] != '-') {
return -1;
}
optchar++;
printf("Checking %c\n", argv[optind][optchar]);
cursor = strchr(optstring, argv[optind][optchar]);
if (cursor) {
if (cursor[1] == ':') {
/* An option-argument is required */
/* if (no arg) { */
/* optopt = *cursor; */
/* if (opterr) { */
/* fprintf(stderr, "%s: Missing argument to -%c\n", argv[0], *cursor); */
/* } */
/* return optstring[0] == ':' ? ':' : '?'; */
/* } */
/* optarg = argv[++optind]; */
/* optchar = 0; */
/* optind++; */
}
return *cursor;
}
optopt = argv[optind][optchar];
if (opterr) {
fprintf(stderr, "%s: Invalid option -%c\n", *cursor);
}
return '?';
}
/*
POSIX(2)
*/
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