2.11BSD#431 - /usr/src/bin/ar/extract.c

   1: /*-
   2:  * Copyright (c) 1990 The Regents of the University of California.
   3:  * 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: 
  37: #if defined(DOSCCS) && !defined(lint)
  38: static char sccsid[] = "@(#)extract.c	5.5 (Berkeley) 3/12/91";
  39: #endif
  40: 
  41: #include <sys/param.h>
  42: #include <sys/time.h>
  43: #include <sys/stat.h>
  44: #include <fcntl.h>
  45: #include <errno.h>
  46: #include <sys/dir.h>
  47: #include <stdio.h>
  48: #include <string.h>
  49: #include "archive.h"
  50: #include "extern.h"
  51: 
  52: extern int errno;
  53: extern CHDR chdr;           /* converted header */
  54: extern char *archive;           /* archive name */
  55: 
  56: /*
  57:  * extract --
  58:  *	Extract files from the named archive - if member names given only
  59:  *	extract those members otherwise extract all members.  If 'o' option
  60:  *	selected modify date of newly created file to be same as archive
  61:  *	members date otherwise date is time of extraction.  Does not modify
  62:  *	archive.
  63:  */
  64: extract(argv)
  65:     char **argv;
  66: {
  67:     register int afd, all, tfd;
  68:     struct timeval tv[2];
  69:     struct stat sb;
  70:     CF cf;
  71:     char *file;
  72: 
  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, 0200)) < 0) {
  92:             (void)fprintf(stderr, "ar: %s: %s.\n",
  93:                 file, strerror(errno));
  94:             skip_arobj(afd);
  95:             continue;
  96:         }
  97: 
  98:         if (options & AR_V)
  99:             (void)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:             (void)fprintf(stderr, "ar: %s: chmod: %s\n",
 107:                 file, strerror(errno));
 108:         }
 109:         if (options & AR_O) {
 110:             tv[0].tv_sec = tv[1].tv_sec = chdr.date;
 111:             if (utimes(file, tv)) {
 112:                 (void)fprintf(stderr, "ar: %s: utimes: %s\n",
 113:                     file, strerror(errno));
 114:             }
 115:         }
 116:         (void)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: }

Defined functions

Defined variables