contrib/libarchive-2.0/libarchive/archive_write_open_fd.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "archive_platform.h"
  27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_write_open_fd.c,v 1.9 2007/01/09 08:05:56 kientzle Exp $");
  28
  29 #ifdef HAVE_SYS_STAT_H
  30 #include <sys/stat.h>
  31 #endif
  32 #ifdef HAVE_ERRNO_H
  33 #include <errno.h>
  34 #endif
  35 #ifdef HAVE_STDLIB_H
  36 #include <stdlib.h>
  37 #endif
  38 #ifdef HAVE_STRING_H
  39 #include <string.h>
  40 #endif
  41 #ifdef HAVE_UNISTD_H
  42 #include <unistd.h>
  43 #endif
  44
  45 #include "archive.h"
  46
  47 struct write_fd_data {
  48         off_t           offset;
  49         int             fd;
  50 };
  51
  52 static int      file_close(struct archive *, void *);
  53 static int      file_open(struct archive *, void *);
  54 static ssize_t  file_write(struct archive *, void *, const void *buff, size_t);
  55
  56 int
  57 archive_write_open_fd(struct archive *a, int fd)
  58 {
  59         struct write_fd_data *mine;
  60
  61         mine = (struct write_fd_data *)malloc(sizeof(*mine));
  62         if (mine == NULL) {
  63                 archive_set_error(a, ENOMEM, "No memory");
  64                 return (ARCHIVE_FATAL);
  65         }
  66         mine->fd = fd;
  67         return (archive_write_open(a, mine,
  68                     file_open, file_write, file_close));
  69 }
  70
  71 static int
  72 file_open(struct archive *a, void *client_data)
  73 {
  74         struct write_fd_data *mine;
  75         struct stat st;
  76
  77         mine = (struct write_fd_data *)client_data;
  78
  79         if (fstat(mine->fd, &st) != 0) {
  80                 archive_set_error(a, errno, "Couldn't stat fd %d", mine->fd);
  81                 return (ARCHIVE_FATAL);
  82         }
  83
  84         /*
  85          * If this is a regular file, don't add it to itself.
  86          */
  87         if (S_ISREG(st.st_mode))
  88                 archive_write_set_skip_file(a, st.st_dev, st.st_ino);
  89
  90         /*
  91          * If client hasn't explicitly set the last block handling,
  92          * then set it here.
  93          */
  94         if (archive_write_get_bytes_in_last_block(a) < 0) {
  95                 /* If the output is a block or character device, fifo,
  96                  * or stdout, pad the last block, otherwise leave it
  97                  * unpadded. */
  98                 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
  99                     S_ISFIFO(st.st_mode) || (mine->fd == 1))
 100                         /* Last block will be fully padded. */
 101                         archive_write_set_bytes_in_last_block(a, 0);
 102                 else
 103                         archive_write_set_bytes_in_last_block(a, 1);
 104         }
 105
 106         return (ARCHIVE_OK);
 107 }
 108
 109 static ssize_t
 110 file_write(struct archive *a, void *client_data, const void *buff, size_t length)
 111 {
 112         struct write_fd_data    *mine;
 113         ssize_t bytesWritten;
 114
 115         mine = (struct write_fd_data *)client_data;
 116         bytesWritten = write(mine->fd, buff, length);
 117         if (bytesWritten <= 0) {
 118                 archive_set_error(a, errno, "Write error");
 119                 return (-1);
 120         }
 121         return (bytesWritten);
 122 }
 123
 124 static int
 125 file_close(struct archive *a, void *client_data)
 126 {
 127         struct write_fd_data    *mine = (struct write_fd_data *)client_data;
 128
 129         (void)a; /* UNUSED */
 130         free(mine);
 131         return (ARCHIVE_OK);
 132 }