usr/src/usr.bin/ranlib/touch.c

/*-
 * 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.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)touch.c     5.2 (Berkeley) %G%";
#endif /* not lint */

#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>

extern CHDR chdr;                       /* converted header */
extern char *archive;                   /* archive name */

touch()
{
        int afd;

        afd = open_archive(O_RDWR);

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

settime(afd)
        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)sprintf(buf, "%-12ld", time((time_t *)NULL) + RANLIBSKEW);
        if (write(afd, buf, sizeof(hdr->ar_date)) != sizeof(hdr->ar_date))
                error(archive);
}