usr.bin/ar/extract.c

   1 /*-
   2  * Copyright (c) 1990, 1993, 1994
   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  * @(#)extract.c        8.3 (Berkeley) 4/2/94
  37  *
  38  * $DragonFly: src/usr.bin/ar/Attic/extract.c,v 1.4 2005/01/13 18:57:56 okumoto Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/time.h>
  43 #include <sys/stat.h>
  44
  45 #include <dirent.h>
  46 #include <err.h>
  47 #include <fcntl.h>
  48 #include <stdio.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #include "archive.h"
  53 #include "extern.h"
  54
  55 /*
  56  * extract --
  57  *      Extract files from the named archive - if member names given only
  58  *      extract those members otherwise extract all members.  If 'o' option
  59  *      selected modify date of newly created file to be same as archive
  60  *      members date otherwise date is time of extraction.  Does not modify
  61  *      archive.
  62  */
  63 int
  64 extract(char **argv)
  65 {
  66         char *file;
  67         int afd, all, eval, tfd;
  68         struct timeval tv[2];
  69         struct stat sb;
  70         CF cf;
  71
  72         eval = 0;
  73         tv[0].tv_usec = tv[1].tv_usec = 0;
  74
  75         afd = open_archive(O_RDONLY);
  76
  77         /* Read from an archive, write to disk; pad on read. */
  78         SETCF(afd, archive, 0, 0, RPAD);
  79         for (all = !*argv; get_arobj(afd);) {
  80                 if (all)
  81                         file = chdr.name;
  82                 else if (!(file = files(argv))) {
  83                         skip_arobj(afd);
  84                         continue;
  85                 }
  86
  87                 if (options & AR_U && !stat(file, &sb) &&
  88                     sb.st_mtime > chdr.date)
  89                         continue;
  90
  91                 if ((tfd = open(file, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR)) < 0) {
  92                         warn("%s", file);
  93                         skip_arobj(afd);
  94                         eval = 1;
  95                         continue;
  96                 }
  97
  98                 if (options & AR_V)
  99                         printf("x - %s\n", file);
 100
 101                 cf.wfd = tfd;
 102                 cf.wname = file;
 103                 copy_ar(&cf, chdr.size);
 104
 105                 if (fchmod(tfd, (short)chdr.mode)) {
 106                         warn("chmod: %s", file);
 107                         eval = 1;
 108                 }
 109                 if (options & AR_O) {
 110                         tv[0].tv_sec = tv[1].tv_sec = chdr.date;
 111                         if (utimes(file, tv)) {
 112                                 warn("utimes: %s", file);
 113                                 eval = 1;
 114                         }
 115                 }
 116                 close(tfd);
 117                 if (!all && !*argv)
 118                         break;
 119         }
 120         close_archive(afd);
 121
 122         if (*argv) {
 123                 orphans(argv);
 124                 return (1);
 125         }
 126         return (0);
 127 }