| /*- |
| * Copyright (c) 2003-2007 Tim Kientzle |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "archive_platform.h" |
| __FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_format_cpio.c,v 1.14 2008/03/15 11:04:45 kientzle Exp $"); |
| |
| #ifdef HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| #include <stdio.h> |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #endif |
| |
| #include "archive.h" |
| #include "archive_entry.h" |
| #include "archive_private.h" |
| #include "archive_write_private.h" |
| |
| static ssize_t archive_write_cpio_data(struct archive_write *, |
| const void *buff, size_t s); |
| static int archive_write_cpio_finish(struct archive_write *); |
| static int archive_write_cpio_destroy(struct archive_write *); |
| static int archive_write_cpio_finish_entry(struct archive_write *); |
| static int archive_write_cpio_header(struct archive_write *, |
| struct archive_entry *); |
| static int format_octal(int64_t, void *, int); |
| static int64_t format_octal_recursive(int64_t, char *, int); |
| |
| struct cpio { |
| uint64_t entry_bytes_remaining; |
| }; |
| |
| struct cpio_header { |
| char c_magic[6]; |
| char c_dev[6]; |
| char c_ino[6]; |
| char c_mode[6]; |
| char c_uid[6]; |
| char c_gid[6]; |
| char c_nlink[6]; |
| char c_rdev[6]; |
| char c_mtime[11]; |
| char c_namesize[6]; |
| char c_filesize[11]; |
| }; |
| |
| /* |
| * Set output format to 'cpio' format. |
| */ |
| int |
| archive_write_set_format_cpio(struct archive *_a) |
| { |
| struct archive_write *a = (struct archive_write *)_a; |
| struct cpio *cpio; |
| |
| /* If someone else was already registered, unregister them. */ |
| if (a->format_destroy != NULL) |
| (a->format_destroy)(a); |
| |
| cpio = (struct cpio *)malloc(sizeof(*cpio)); |
| if (cpio == NULL) { |
| archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data"); |
| return (ARCHIVE_FATAL); |
| } |
| memset(cpio, 0, sizeof(*cpio)); |
| a->format_data = cpio; |
| |
| a->pad_uncompressed = 1; |
| a->format_name = "cpio"; |
| a->format_write_header = archive_write_cpio_header; |
| a->format_write_data = archive_write_cpio_data; |
| a->format_finish_entry = archive_write_cpio_finish_entry; |
| a->format_finish = archive_write_cpio_finish; |
| a->format_destroy = archive_write_cpio_destroy; |
| a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX; |
| a->archive.archive_format_name = "POSIX cpio"; |
| return (ARCHIVE_OK); |
| } |
| |
| static int |
| archive_write_cpio_header(struct archive_write *a, struct archive_entry *entry) |
| { |
| struct cpio *cpio; |
| const char *p, *path; |
| int pathlength, ret; |
| struct cpio_header h; |
| |
| cpio = (struct cpio *)a->format_data; |
| ret = 0; |
| |
| path = archive_entry_pathname(entry); |
| pathlength = strlen(path) + 1; /* Include trailing null. */ |
| |
| memset(&h, 0, sizeof(h)); |
| format_octal(070707, &h.c_magic, sizeof(h.c_magic)); |
| format_octal(archive_entry_dev(entry), &h.c_dev, sizeof(h.c_dev)); |
| /* |
| * TODO: Generate artificial inode numbers rather than just |
| * re-using the ones off the disk. That way, the 18-bit c_ino |
| * field only limits the number of files in the archive. |
| */ |
| if (archive_entry_ino(entry) > 0777777) { |
| archive_set_error(&a->archive, ERANGE, "large inode number truncated"); |
| ret = ARCHIVE_WARN; |
| } |
| |
| format_octal(archive_entry_ino(entry) & 0777777, &h.c_ino, sizeof(h.c_ino)); |
| format_octal(archive_entry_mode(entry), &h.c_mode, sizeof(h.c_mode)); |
| format_octal(archive_entry_uid(entry), &h.c_uid, sizeof(h.c_uid)); |
| format_octal(archive_entry_gid(entry), &h.c_gid, sizeof(h.c_gid)); |
| format_octal(archive_entry_nlink(entry), &h.c_nlink, sizeof(h.c_nlink)); |
| if (archive_entry_filetype(entry) == AE_IFBLK |
| || archive_entry_filetype(entry) == AE_IFCHR) |
| format_octal(archive_entry_dev(entry), &h.c_rdev, sizeof(h.c_rdev)); |
| else |
| format_octal(0, &h.c_rdev, sizeof(h.c_rdev)); |
| format_octal(archive_entry_mtime(entry), &h.c_mtime, sizeof(h.c_mtime)); |
| format_octal(pathlength, &h.c_namesize, sizeof(h.c_namesize)); |
| |
| /* Non-regular files don't store bodies. */ |
| if (archive_entry_filetype(entry) != AE_IFREG) |
| archive_entry_set_size(entry, 0); |
| |
| /* Symlinks get the link written as the body of the entry. */ |
| p = archive_entry_symlink(entry); |
| if (p != NULL && *p != '\0') |
| format_octal(strlen(p), &h.c_filesize, sizeof(h.c_filesize)); |
| else |
| format_octal(archive_entry_size(entry), |
| &h.c_filesize, sizeof(h.c_filesize)); |
| |
| ret = (a->compressor.write)(a, &h, sizeof(h)); |
| if (ret != ARCHIVE_OK) |
| return (ARCHIVE_FATAL); |
| |
| ret = (a->compressor.write)(a, path, pathlength); |
| if (ret != ARCHIVE_OK) |
| return (ARCHIVE_FATAL); |
| |
| cpio->entry_bytes_remaining = archive_entry_size(entry); |
| |
| /* Write the symlink now. */ |
| if (p != NULL && *p != '\0') |
| ret = (a->compressor.write)(a, p, strlen(p)); |
| |
| return (ret); |
| } |
| |
| static ssize_t |
| archive_write_cpio_data(struct archive_write *a, const void *buff, size_t s) |
| { |
| struct cpio *cpio; |
| int ret; |
| |
| cpio = (struct cpio *)a->format_data; |
| if (s > cpio->entry_bytes_remaining) |
| s = cpio->entry_bytes_remaining; |
| |
| ret = (a->compressor.write)(a, buff, s); |
| cpio->entry_bytes_remaining -= s; |
| if (ret >= 0) |
| return (s); |
| else |
| return (ret); |
| } |
| |
| /* |
| * Format a number into the specified field. |
| */ |
| static int |
| format_octal(int64_t v, void *p, int digits) |
| { |
| int64_t max; |
| int ret; |
| |
| max = (((int64_t)1) << (digits * 3)) - 1; |
| if (v >= 0 && v <= max) { |
| format_octal_recursive(v, (char *)p, digits); |
| ret = 0; |
| } else { |
| format_octal_recursive(max, (char *)p, digits); |
| ret = -1; |
| } |
| return (ret); |
| } |
| |
| static int64_t |
| format_octal_recursive(int64_t v, char *p, int s) |
| { |
| if (s == 0) |
| return (v); |
| v = format_octal_recursive(v, p+1, s-1); |
| *p = '0' + (v & 7); |
| return (v >>= 3); |
| } |
| |
| static int |
| archive_write_cpio_finish(struct archive_write *a) |
| { |
| struct cpio *cpio; |
| int er; |
| struct archive_entry *trailer; |
| |
| cpio = (struct cpio *)a->format_data; |
| trailer = archive_entry_new(); |
| /* nlink = 1 here for GNU cpio compat. */ |
| archive_entry_set_nlink(trailer, 1); |
| archive_entry_set_pathname(trailer, "TRAILER!!!"); |
| er = archive_write_cpio_header(a, trailer); |
| archive_entry_free(trailer); |
| return (er); |
| } |
| |
| static int |
| archive_write_cpio_destroy(struct archive_write *a) |
| { |
| struct cpio *cpio; |
| |
| cpio = (struct cpio *)a->format_data; |
| free(cpio); |
| a->format_data = NULL; |
| return (ARCHIVE_OK); |
| } |
| |
| static int |
| archive_write_cpio_finish_entry(struct archive_write *a) |
| { |
| struct cpio *cpio; |
| int to_write, ret; |
| |
| cpio = (struct cpio *)a->format_data; |
| ret = ARCHIVE_OK; |
| while (cpio->entry_bytes_remaining > 0) { |
| to_write = cpio->entry_bytes_remaining < a->null_length ? |
| cpio->entry_bytes_remaining : a->null_length; |
| ret = (a->compressor.write)(a, a->nulls, to_write); |
| if (ret != ARCHIVE_OK) |
| return (ret); |
| cpio->entry_bytes_remaining -= to_write; |
| } |
| return (ret); |
| } |