summaryrefslogtreecommitdiffstats
path: root/lib/libarchive/archive_write_set_format_cpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libarchive/archive_write_set_format_cpio.c')
-rw-r--r--lib/libarchive/archive_write_set_format_cpio.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/lib/libarchive/archive_write_set_format_cpio.c b/lib/libarchive/archive_write_set_format_cpio.c
deleted file mode 100644
index 798646a..0000000
--- a/lib/libarchive/archive_write_set_format_cpio.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*-
- * 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("$FreeBSD$");
-
-#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;
-
- int64_t ino_next;
-
- struct { int64_t old; int new;} *ino_list;
- size_t ino_list_size;
- size_t ino_list_next;
-};
-
-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];
-} __packed;
-
-/*
- * 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);
-}
-
-/*
- * Ino values are as long as 64 bits on some systems; cpio format
- * only allows 18 bits and relies on the ino values to identify hardlinked
- * files. So, we can't merely "hash" the ino numbers since collisions
- * would corrupt the archive. Instead, we generate synthetic ino values
- * to store in the archive and maintain a map of original ino values to
- * synthetic ones so we can preserve hardlink information.
- *
- * TODO: Make this more efficient. It's not as bad as it looks (most
- * files don't have any hardlinks and we don't do any work here for those),
- * but it wouldn't be hard to do better.
- *
- * TODO: Work with dev/ino pairs here instead of just ino values.
- */
-static int
-synthesize_ino_value(struct cpio *cpio, struct archive_entry *entry)
-{
- int64_t ino = archive_entry_ino64(entry);
- int ino_new;
- size_t i;
-
- /*
- * If no index number was given, don't assign one. In
- * particular, this handles the end-of-archive marker
- * correctly by giving it a zero index value. (This is also
- * why we start our synthetic index numbers with one below.)
- */
- if (ino == 0)
- return (0);
-
- /* Don't store a mapping if we don't need to. */
- if (archive_entry_nlink(entry) < 2) {
- return ++cpio->ino_next;
- }
-
- /* Look up old ino; if we have it, this is a hardlink
- * and we reuse the same value. */
- for (i = 0; i < cpio->ino_list_next; ++i) {
- if (cpio->ino_list[i].old == ino)
- return (cpio->ino_list[i].new);
- }
-
- /* Assign a new index number. */
- ino_new = ++cpio->ino_next;
-
- /* Ensure space for the new mapping. */
- if (cpio->ino_list_size <= cpio->ino_list_next) {
- size_t newsize = cpio->ino_list_size < 512
- ? 512 : cpio->ino_list_size * 2;
- void *newlist = realloc(cpio->ino_list,
- sizeof(cpio->ino_list[0]) * newsize);
- if (newlist == NULL)
- return (-1);
-
- cpio->ino_list_size = newsize;
- cpio->ino_list = newlist;
- }
-
- /* Record and return the new value. */
- cpio->ino_list[cpio->ino_list_next].old = ino;
- cpio->ino_list[cpio->ino_list_next].new = ino_new;
- ++cpio->ino_list_next;
- return (ino_new);
-}
-
-static int
-archive_write_cpio_header(struct archive_write *a, struct archive_entry *entry)
-{
- struct cpio *cpio;
- const char *p, *path;
- int pathlength, ret, ret2;
- int64_t ino;
- struct cpio_header h;
-
- 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_octal(070707, &h.c_magic, sizeof(h.c_magic));
- format_octal(archive_entry_dev(entry), &h.c_dev, sizeof(h.c_dev));
-
- ino = synthesize_ino_value(cpio, entry);
- if (ino < 0) {
- archive_set_error(&a->archive, ENOMEM,
- "No memory for ino translation table");
- return (ARCHIVE_FATAL);
- } else if (ino > 0777777) {
- archive_set_error(&a->archive, ERANGE,
- "Too many files for this cpio format");
- return (ARCHIVE_FATAL);
- }
- format_octal(ino & 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));
-
- if (ret == ARCHIVE_OK)
- ret = ret2;
- 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)
-{
- int er;
- struct archive_entry *trailer;
-
- 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->ino_list);
- free(cpio);
- a->format_data = NULL;
- return (ARCHIVE_OK);
-}
-
-static int
-archive_write_cpio_finish_entry(struct archive_write *a)
-{
- struct cpio *cpio;
- size_t to_write;
- int 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);
-}
OpenPOWER on IntegriCloud