diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_write_set_format_cpio.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_write_set_format_cpio.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_write_set_format_cpio.c b/Utilities/cmlibarchive/libarchive/archive_write_set_format_cpio.c new file mode 100644 index 0000000..1c5bb13 --- /dev/null +++ b/Utilities/cmlibarchive/libarchive/archive_write_set_format_cpio.c @@ -0,0 +1,271 @@ +/*- + * 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); +} |