/* See LICENSE file for copyright and license details. */
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/utsname.h>
#include "util.h"

static void
usage(void)
{
	eprintf("usage: %s [-amnrsv]\n", argv0);
}

int
main(int argc, char *argv[])
{
	bool mflag = false;
	bool nflag = false;
	bool rflag = false;
	bool sflag = false;
	bool vflag = false;
	struct utsname u;

	ARGBEGIN {
	case 'a':
		mflag = nflag = rflag = sflag = vflag = true;
		break;
	case 'm':
		mflag = true;
		break;
	case 'n':
		nflag = true;
		break;
	case 'r':
		rflag = true;
		break;
	case 's':
		sflag = true;
		break;
	case 'v':
		vflag = true;
		break;
	default:
		usage();
	} ARGEND;
	if(uname(&u) == -1)
		eprintf("uname:");

	if(sflag || !(nflag || rflag || vflag || mflag))
		putword(u.sysname);
	if(nflag)
		putword(u.nodename);
	if(rflag)
		putword(u.release);
	if(vflag)
		putword(u.version);
	if(mflag)
		putword(u.machine);
	putchar('\n');

	return 0;
}