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: head/lib/libarchive/archive_write_open_filename.c 191165 2009-04-17 00:39:35Z kientzle $"); 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_FCNTL_H 36 #include <fcntl.h> 37 #endif 38 #ifdef HAVE_STDLIB_H 39 #include <stdlib.h> 40 #endif 41 #ifdef HAVE_STRING_H 42 #include <string.h> 43 #endif 44 #ifdef HAVE_UNISTD_H 45 #include <unistd.h> 46 #endif 47 48 #include "archive.h" 49 50 #ifndef O_BINARY 51 #define O_BINARY 0 52 #endif 53 54 struct write_file_data { 55 int fd; 56 char filename[1]; 57 }; 58 59 static int file_close(struct archive *, void *); 60 static int file_open(struct archive *, void *); 61 static ssize_t file_write(struct archive *, void *, const void *buff, size_t); 62 63 int 64 archive_write_open_file(struct archive *a, const char *filename) 65 { 66 return (archive_write_open_filename(a, filename)); 67 } 68 69 int 70 archive_write_open_filename(struct archive *a, const char *filename) 71 { 72 struct write_file_data *mine; 73 74 if (filename == NULL || filename[0] == '\0') 75 return (archive_write_open_fd(a, 1)); 76 77 mine = (struct write_file_data *)malloc(sizeof(*mine) + strlen(filename)); 78 if (mine == NULL) { 79 archive_set_error(a, ENOMEM, "No memory"); 80 return (ARCHIVE_FATAL); 81 } 82 strcpy(mine->filename, filename); 83 mine->fd = -1; 84 return (archive_write_open(a, mine, 85 file_open, file_write, file_close)); 86 } 87 88 static int 89 file_open(struct archive *a, void *client_data) 90 { 91 int flags; 92 struct write_file_data *mine; 93 struct stat st; 94 95 mine = (struct write_file_data *)client_data; 96 flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY; 97 98 /* 99 * Open the file. 100 */ 101 mine->fd = open(mine->filename, flags, 0666); 102 if (mine->fd < 0) { 103 archive_set_error(a, errno, "Failed to open '%s'", 104 mine->filename); 105 return (ARCHIVE_FATAL); 106 } 107 108 if (fstat(mine->fd, &st) != 0) { 109 archive_set_error(a, errno, "Couldn't stat '%s'", 110 mine->filename); 111 return (ARCHIVE_FATAL); 112 } 113 114 /* 115 * Set up default last block handling. 116 */ 117 if (archive_write_get_bytes_in_last_block(a) < 0) { 118 if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) || 119 S_ISFIFO(st.st_mode)) 120 /* Pad last block when writing to device or FIFO. */ 121 archive_write_set_bytes_in_last_block(a, 0); 122 else 123 /* Don't pad last block otherwise. */ 124 archive_write_set_bytes_in_last_block(a, 1); 125 } 126 127 /* 128 * If the output file is a regular file, don't add it to 129 * itself. If it's a device file, it's okay to add the device 130 * entry to the output archive. 131 */ 132 if (S_ISREG(st.st_mode)) 133 archive_write_set_skip_file(a, st.st_dev, st.st_ino); 134 135 return (ARCHIVE_OK); 136 } 137 138 static ssize_t 139 file_write(struct archive *a, void *client_data, const void *buff, size_t length) 140 { 141 struct write_file_data *mine; 142 ssize_t bytesWritten; 143 144 mine = (struct write_file_data *)client_data; 145 for (;;) { 146 bytesWritten = write(mine->fd, buff, length); 147 if (bytesWritten <= 0) { 148 if (errno == EINTR) 149 continue; 150 archive_set_error(a, errno, "Write error"); 151 return (-1); 152 } 153 return (bytesWritten); 154 } 155 } 156 157 static int 158 file_close(struct archive *a, void *client_data) 159 { 160 struct write_file_data *mine = (struct write_file_data *)client_data; 161 162 (void)a; /* UNUSED */ 163 close(mine->fd); 164 free(mine); 165 return (ARCHIVE_OK); 166 } 167