/*	$OpenBSD: touch.c,v 1.8 2013/04/02 04:58:54 deraadt Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Hugh Smith at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <ranlib.h>
#include <ar.h>
#include <time.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <archive.h>
#include "extern.h"

extern CHDR chdr;			/* converted header */

int
touch(void)
{
	int afd;

	afd = open_archive(O_RDWR);

	if (!get_arobj(afd) ||
	    strncmp(RANLIBMAG, chdr.name, sizeof(RANLIBMAG) - 1)) {
		(void)fprintf(stderr,
		    "ranlib: %s: no symbol table.\n", archive);
		return(1);
	}
	settime(afd);
	close_archive(afd);
	return(0);
}

void
settime(int afd)
{
	struct ar_hdr *hdr;
	off_t size;
	char buf[50];

	size = SARMAG + sizeof(hdr->ar_name);
	if (lseek(afd, size, SEEK_SET) == (off_t)-1)
		error(archive);
	(void)snprintf(buf, sizeof buf,
	    "%-12lld", (long long)time((time_t *)NULL) + RANLIBSKEW);
	if (write(afd, buf, sizeof(hdr->ar_date)) != sizeof(hdr->ar_date))
		error(archive);
}