/*- * 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; int64_t ino; 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. */ ino = archive_entry_ino64(entry); if (ino < 0 || ino > 0777777) { archive_set_error(&a->archive, ERANGE, "large inode number truncated"); ret = ARCHIVE_WARN; } format_octal(archive_entry_ino64(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); }