usr.bin/ranlib/touch.c

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Hugh Smith at The University of Guelph.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)touch.c  8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/ranlib/touch.c,v 1.6 1999/08/28 01:05:04 peter Exp $
  38  * $DragonFly: src/usr.bin/ranlib/touch.c,v 1.4 2004/07/24 13:45:44 eirikn Exp $
  39  */
  40
  41 #include <sys/types.h>
  42 #include <ar.h>
  43 #include <dirent.h>
  44 #include <err.h>
  45 #include <fcntl.h>
  46 #include <ranlib.h>
  47 #include <stdio.h>
  48 #include <string.h>
  49 #include <time.h>
  50 #include <unistd.h>
  51 #include "archive.h"
  52
  53 extern CHDR chdr;                       /* converted header */
  54 extern char *archive;                   /* archive name */
  55
  56 extern void error( char * );
  57 void settime( int );
  58 int touch( void );
  59
  60 int
  61 touch(void)
  62 {
  63         int afd;
  64
  65         afd = open_archive(O_RDWR);
  66
  67         if (!get_arobj(afd) ||
  68             strncmp(RANLIBMAG, chdr.name, sizeof(RANLIBMAG) - 1)) {
  69                 warnx("%s: no symbol table", archive);
  70                 return(1);
  71         }
  72         settime(afd);
  73         close_archive(afd);
  74         return(0);
  75 }
  76
  77 void
  78 settime(int afd)
  79 {
  80         struct ar_hdr *hdr;
  81         off_t size;
  82         char buf[50];
  83
  84         size = SARMAG + sizeof(hdr->ar_name);
  85         if (lseek(afd, size, SEEK_SET) == (off_t)-1)
  86                 error(archive);
  87         (void)sprintf(buf, "%-12ld", (long)time((time_t *)NULL) + RANLIBSKEW);
  88         if (write(afd, buf, sizeof(hdr->ar_date)) != sizeof(hdr->ar_date))
  89                 error(archive);
  90 }