freebsd-dev/usr.bin/getopt/getopt.c

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#include <stdio.h>
main(argc, argv)
int argc;
char *argv[];
{
extern int optind;
extern char *optarg;
int c;
int status = 0;
optind = 2; /* Past the program name and the option letters. */
while ((c = getopt(argc, argv, argv[1])) != -1)
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switch (c) {
case '?':
status = 1; /* getopt routine gave message */
break;
default:
if (optarg != NULL)
printf(" -%c %s", c, optarg);
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else
printf(" -%c", c);
break;
}
printf(" --");
for (; optind < argc; optind++)
printf(" %s", argv[optind]);
printf("\n");
exit(status);
}