diff options
Diffstat (limited to 'lib/libarchive/archive_write_set_format_cpio_newc.c')
-rw-r--r-- | lib/libarchive/archive_write_set_format_cpio_newc.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/lib/libarchive/archive_write_set_format_cpio_newc.c b/lib/libarchive/archive_write_set_format_cpio_newc.c new file mode 100644 index 0000000..187e7d6 --- /dev/null +++ b/lib/libarchive/archive_write_set_format_cpio_newc.c @@ -0,0 +1,295 @@ +/*- + * Copyright (c) 2003-2007 Tim Kientzle + * Copyright (c) 2006 Rudolf Marek SYSGO s.r.o. + * 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("$FreeBSD$"); + +#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_newc_data(struct archive_write *, + const void *buff, size_t s); +static int archive_write_newc_finish(struct archive_write *); +static int archive_write_newc_destroy(struct archive_write *); +static int archive_write_newc_finish_entry(struct archive_write *); +static int archive_write_newc_header(struct archive_write *, + struct archive_entry *); +static int format_hex(int64_t, void *, int); +static int64_t format_hex_recursive(int64_t, char *, int); + +struct cpio { + uint64_t entry_bytes_remaining; + int padding; +}; + +struct cpio_header_newc { + char c_magic[6]; + char c_ino[8]; + char c_mode[8]; + char c_uid[8]; + char c_gid[8]; + char c_nlink[8]; + char c_mtime[8]; + char c_filesize[8]; + char c_devmajor[8]; + char c_devminor[8]; + char c_rdevmajor[8]; + char c_rdevminor[8]; + char c_namesize[8]; + char c_checksum[8]; +}; + +/* Logic trick: difference between 'n' and next multiple of 4 */ +#define PAD4(n) (3 & (1 + ~(n))) + +/* + * Set output format to 'cpio' format. + */ +int +archive_write_set_format_cpio_newc(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_newc_header; + a->format_write_data = archive_write_newc_data; + a->format_finish_entry = archive_write_newc_finish_entry; + a->format_finish = archive_write_newc_finish; + a->format_destroy = archive_write_newc_destroy; + a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; + a->archive.archive_format_name = "SVR4 cpio nocrc"; + return (ARCHIVE_OK); +} + +static int +archive_write_newc_header(struct archive_write *a, struct archive_entry *entry) +{ + int64_t ino; + struct cpio *cpio; + const char *p, *path; + int pathlength, ret, ret2; + struct cpio_header_newc h; + int pad; + + cpio = (struct cpio *)a->format_data; + ret2 = ARCHIVE_OK; + + path = archive_entry_pathname(entry); + pathlength = (int)strlen(path) + 1; /* Include trailing null. */ + + memset(&h, 0, sizeof(h)); + format_hex(0x070701, &h.c_magic, sizeof(h.c_magic)); + format_hex(archive_entry_devmajor(entry), &h.c_devmajor, + sizeof(h.c_devmajor)); + format_hex(archive_entry_devminor(entry), &h.c_devminor, + sizeof(h.c_devminor)); + + ino = archive_entry_ino64(entry); + if (ino > 0xffffffff) { + archive_set_error(&a->archive, ERANGE, + "large inode number truncated"); + ret2 = ARCHIVE_WARN; + } + + format_hex(ino & 0xffffffff, &h.c_ino, sizeof(h.c_ino)); + format_hex(archive_entry_mode(entry), &h.c_mode, sizeof(h.c_mode)); + format_hex(archive_entry_uid(entry), &h.c_uid, sizeof(h.c_uid)); + format_hex(archive_entry_gid(entry), &h.c_gid, sizeof(h.c_gid)); + format_hex(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_hex(archive_entry_rdevmajor(entry), &h.c_rdevmajor, sizeof(h.c_rdevmajor)); + format_hex(archive_entry_rdevminor(entry), &h.c_rdevminor, sizeof(h.c_rdevminor)); + } else { + format_hex(0, &h.c_rdevmajor, sizeof(h.c_rdevmajor)); + format_hex(0, &h.c_rdevminor, sizeof(h.c_rdevminor)); + } + format_hex(archive_entry_mtime(entry), &h.c_mtime, sizeof(h.c_mtime)); + format_hex(pathlength, &h.c_namesize, sizeof(h.c_namesize)); + format_hex(0, &h.c_checksum, sizeof(h.c_checksum)); + + /* 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_hex(strlen(p), &h.c_filesize, sizeof(h.c_filesize)); + else + format_hex(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); + + /* Pad pathname to even length. */ + ret = (a->compressor.write)(a, path, pathlength); + if (ret != ARCHIVE_OK) + return (ARCHIVE_FATAL); + pad = PAD4(pathlength + sizeof(struct cpio_header_newc)); + if (pad) + ret = (a->compressor.write)(a, "\0\0\0", pad); + if (ret != ARCHIVE_OK) + return (ARCHIVE_FATAL); + + cpio->entry_bytes_remaining = archive_entry_size(entry); + cpio->padding = PAD4(cpio->entry_bytes_remaining); + + /* Write the symlink now. */ + if (p != NULL && *p != '\0') { + ret = (a->compressor.write)(a, p, strlen(p)); + if (ret != ARCHIVE_OK) + return (ARCHIVE_FATAL); + pad = PAD4(strlen(p)); + ret = (a->compressor.write)(a, "\0\0\0", pad); + } + + if (ret == ARCHIVE_OK) + ret = ret2; + return (ret); +} + +static ssize_t +archive_write_newc_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_hex(int64_t v, void *p, int digits) +{ + int64_t max; + int ret; + + max = (((int64_t)1) << (digits * 4)) - 1; + if (v >= 0 && v <= max) { + format_hex_recursive(v, (char *)p, digits); + ret = 0; + } else { + format_hex_recursive(max, (char *)p, digits); + ret = -1; + } + return (ret); +} + +static int64_t +format_hex_recursive(int64_t v, char *p, int s) +{ + if (s == 0) + return (v); + v = format_hex_recursive(v, p+1, s-1); + *p = "0123456789abcdef"[v & 0xf]; + return (v >> 4); +} + +static int +archive_write_newc_finish(struct archive_write *a) +{ + int er; + struct archive_entry *trailer; + + trailer = archive_entry_new(); + archive_entry_set_nlink(trailer, 1); + archive_entry_set_pathname(trailer, "TRAILER!!!"); + er = archive_write_newc_header(a, trailer); + archive_entry_free(trailer); + return (er); +} + +static int +archive_write_newc_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_newc_finish_entry(struct archive_write *a) +{ + struct cpio *cpio; + size_t to_write; + int ret; + + cpio = (struct cpio *)a->format_data; + 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; + } + ret = (a->compressor.write)(a, a->nulls, cpio->padding); + return (ret); +} |