int fd;
/* Current offset for writing data to the file. */
off_t offset;
+ /* Last offset actually written to disk. */
+ off_t fd_offset;
/* Maximum size of file, -1 if unknown. */
off_t filesize;
/* Dir we were in before this restore; only for deep paths. */
/* UID/GID to use in restoring this entry. */
uid_t uid;
gid_t gid;
- /* Last offset written to disk. */
- off_t last_offset;
};
/*
static gid_t trivial_lookup_gid(void *, const char *, gid_t);
static uid_t trivial_lookup_uid(void *, const char *, uid_t);
static ssize_t write_data_block(struct archive_write_disk *,
- const char *, size_t, off_t);
+ const char *, size_t);
static struct archive_vtable *archive_write_disk_vtable(void);
}
a->entry = archive_entry_clone(entry);
a->fd = -1;
- a->last_offset = 0;
+ a->fd_offset = 0;
a->offset = 0;
a->uid = a->user_uid;
a->mode = archive_entry_mode(a->entry);
}
static ssize_t
-write_data_block(struct archive_write_disk *a,
- const char *buff, size_t size, off_t offset)
+write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
{
+ uint64_t start_size = size;
ssize_t bytes_written = 0;
ssize_t block_size = 0, bytes_to_write;
#endif
}
- if (a->filesize >= 0 && (off_t)(offset + size) > a->filesize)
- size = (size_t)(a->filesize - offset);
+ /* If this write would run beyond the file size, truncate it. */
+ if (a->filesize >= 0 && (off_t)(a->offset + size) > a->filesize)
+ start_size = size = (size_t)(a->filesize - a->offset);
/* Write the data. */
while (size > 0) {
if (*p != '\0')
break;
}
- offset += p - buff;
+ a->offset += p - buff;
size -= p - buff;
buff = p;
if (size == 0)
/* Calculate next block boundary after offset. */
block_end
- = (offset / block_size) * block_size + block_size;
+ = (a->offset / block_size + 1) * block_size;
/* If the adjusted write would cross block boundary,
* truncate it to the block boundary. */
bytes_to_write = size;
- if (offset + bytes_to_write > block_end)
- bytes_to_write = block_end - offset;
+ if (a->offset + bytes_to_write > block_end)
+ bytes_to_write = block_end - a->offset;
}
/* Seek if necessary to the specified offset. */
- if (offset != a->last_offset) {
- if (lseek(a->fd, offset, SEEK_SET) < 0) {
+ if (a->offset != a->fd_offset) {
+ if (lseek(a->fd, a->offset, SEEK_SET) < 0) {
archive_set_error(&a->archive, errno,
"Seek failed");
return (ARCHIVE_FATAL);
}
+ a->fd_offset = a->offset;
+ a->archive.file_position = a->offset;
+ a->archive.raw_position = a->offset;
}
bytes_written = write(a->fd, buff, bytes_to_write);
if (bytes_written < 0) {
}
buff += bytes_written;
size -= bytes_written;
- offset += bytes_written;
+ a->offset += bytes_written;
a->archive.file_position += bytes_written;
a->archive.raw_position += bytes_written;
- a->last_offset = a->offset = offset;
+ a->fd_offset = a->offset;
}
- return (bytes_written);
+ return (start_size - size);
}
static ssize_t
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
ARCHIVE_STATE_DATA, "archive_write_disk_block");
- r = write_data_block(a, buff, size, offset);
-
- if (r < 0)
+ a->offset = offset;
+ r = write_data_block(a, buff, size);
+ if (r < ARCHIVE_OK)
return (r);
if ((size_t)r < size) {
archive_set_error(&a->archive, 0,
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
ARCHIVE_STATE_DATA, "archive_write_data");
- return (write_data_block(a, buff, size, a->offset));
+ return (write_data_block(a, buff, size));
}
static int
/* There's no file. */
} else if (a->filesize < 0) {
/* File size is unknown, so we can't set the size. */
- } else if (a->last_offset == a->filesize) {
+ } else if (a->fd_offset == a->filesize) {
/* Last write ended at exactly the filesize; we're done. */
/* Hopefully, this is the common case. */
} else {
--- /dev/null
+/*-
+ * 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 "test.h"
+__FBSDID("$FreeBSD$");
+
+/*
+ * Write a file using archive_write_data call, read the file
+ * back and verify the contents. The data written includes large
+ * blocks of nulls, so it should exercise the sparsification logic
+ * if ARCHIVE_EXTRACT_SPARSE is enabled.
+ */
+static void
+verify_write_data(struct archive *a, int sparse)
+{
+ static const char data[]="abcdefghijklmnopqrstuvwxyz";
+ struct stat st;
+ struct archive_entry *ae;
+ size_t buff_size = 64 * 1024;
+ char *buff, *p;
+ const char *msg = sparse ? "sparse" : "non-sparse";
+ int fd;
+
+ buff = malloc(buff_size);
+ assert(buff != NULL);
+
+ ae = archive_entry_new();
+ assert(ae != NULL);
+ archive_entry_set_size(ae, 8 * buff_size);
+ archive_entry_set_pathname(ae, "test_write_data");
+ archive_entry_set_mode(ae, AE_IFREG | 0755);
+ assertEqualIntA(a, 0, archive_write_header(a, ae));
+
+ /* Use archive_write_data() to write three relatively sparse blocks. */
+
+ /* First has non-null data at beginning. */
+ memset(buff, 0, buff_size);
+ memcpy(buff, data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(buff_size, archive_write_data(a, buff, buff_size));
+
+ /* Second has non-null data in the middle. */
+ memset(buff, 0, buff_size);
+ memcpy(buff + buff_size / 2 - 3, data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(buff_size, archive_write_data(a, buff, buff_size));
+
+ /* Third has non-null data at the end. */
+ memset(buff, 0, buff_size);
+ memcpy(buff + buff_size - sizeof(data), data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(buff_size, archive_write_data(a, buff, buff_size));
+
+ failure("%s", msg);
+ assertEqualIntA(a, 0, archive_write_finish_entry(a));
+
+ /* Test the entry on disk. */
+ assert(0 == stat(archive_entry_pathname(ae), &st));
+ assertEqualInt(st.st_size, 8 * buff_size);
+ fd = open(archive_entry_pathname(ae), O_RDONLY);
+ if (!assert(fd >= 0))
+ return;
+
+ /* Check first block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ failure("%s", msg);
+ assertEqualMem(buff, data, sizeof(data));
+ for (p = buff + sizeof(data); p < buff + buff_size; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check second block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ for (p = buff; p < buff + buff_size; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (p == buff + buff_size / 2 - 3) {
+ assertEqualMem(p, data, sizeof(data));
+ p += sizeof(data);
+ } else if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check third block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ for (p = buff; p < buff + buff_size - sizeof(data); ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+ failure("%s", msg);
+ assertEqualMem(buff + buff_size - sizeof(data), data, sizeof(data));
+
+ /* XXX more XXX */
+
+ assertEqualInt(0, close(fd));
+ free(buff);
+}
+
+/*
+ * As above, but using the archive_write_data_block() call.
+ */
+static void
+verify_write_data_block(struct archive *a, int sparse)
+{
+ static const char data[]="abcdefghijklmnopqrstuvwxyz";
+ struct stat st;
+ struct archive_entry *ae;
+ size_t buff_size = 64 * 1024;
+ char *buff, *p;
+ const char *msg = sparse ? "sparse" : "non-sparse";
+ int fd;
+
+ buff = malloc(buff_size);
+ assert(buff != NULL);
+
+ ae = archive_entry_new();
+ assert(ae != NULL);
+ archive_entry_set_size(ae, 8 * buff_size);
+ archive_entry_set_pathname(ae, "test_write_data_block");
+ archive_entry_set_mode(ae, AE_IFREG | 0755);
+ assertEqualIntA(a, 0, archive_write_header(a, ae));
+
+ /* Use archive_write_data_block() to write three
+ relatively sparse blocks. */
+
+ /* First has non-null data at beginning. */
+ memset(buff, 0, buff_size);
+ memcpy(buff, data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(ARCHIVE_OK,
+ archive_write_data_block(a, buff, buff_size, 100));
+
+ /* Second has non-null data in the middle. */
+ memset(buff, 0, buff_size);
+ memcpy(buff + buff_size / 2 - 3, data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(ARCHIVE_OK,
+ archive_write_data_block(a, buff, buff_size, buff_size + 200));
+
+ /* Third has non-null data at the end. */
+ memset(buff, 0, buff_size);
+ memcpy(buff + buff_size - sizeof(data), data, sizeof(data));
+ failure("%s", msg);
+ assertEqualInt(ARCHIVE_OK,
+ archive_write_data_block(a, buff, buff_size, buff_size * 2 + 300));
+
+ failure("%s", msg);
+ assertEqualIntA(a, 0, archive_write_finish_entry(a));
+
+ /* Test the entry on disk. */
+ assert(0 == stat(archive_entry_pathname(ae), &st));
+ assertEqualInt(st.st_size, 8 * buff_size);
+ fd = open(archive_entry_pathname(ae), O_RDONLY);
+ if (!assert(fd >= 0))
+ return;
+
+ /* Check 100-byte gap at beginning */
+ assertEqualInt(100, read(fd, buff, 100));
+ failure("%s", msg);
+ for (p = buff; p < buff + 100; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check first block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ failure("%s", msg);
+ assertEqualMem(buff, data, sizeof(data));
+ for (p = buff + sizeof(data); p < buff + buff_size; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check 100-byte gap */
+ assertEqualInt(100, read(fd, buff, 100));
+ failure("%s", msg);
+ for (p = buff; p < buff + 100; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check second block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ for (p = buff; p < buff + buff_size; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (p == buff + buff_size / 2 - 3) {
+ assertEqualMem(p, data, sizeof(data));
+ p += sizeof(data);
+ } else if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check 100-byte gap */
+ assertEqualInt(100, read(fd, buff, 100));
+ failure("%s", msg);
+ for (p = buff; p < buff + 100; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+ /* Check third block. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ for (p = buff; p < buff + buff_size - sizeof(data); ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+ failure("%s", msg);
+ assertEqualMem(buff + buff_size - sizeof(data), data, sizeof(data));
+
+ /* Check another block size beyond last we wrote. */
+ assertEqualInt(buff_size, read(fd, buff, buff_size));
+ failure("%s", msg);
+ for (p = buff; p < buff + buff_size; ++p) {
+ failure("offset: %d, %s", (int)(p - buff), msg);
+ if (!assertEqualInt(0, *p))
+ break;
+ }
+
+
+ /* XXX more XXX */
+
+ assertEqualInt(0, close(fd));
+ free(buff);
+}
+
+DEFINE_TEST(test_write_disk_sparse)
+{
+ struct archive *ad;
+
+
+ /*
+ * The return values, etc, of the write data functions
+ * shouldn't change regardless of whether we've requested
+ * sparsification. (The performance and pattern of actual
+ * write calls to the disk should vary, of course, but the
+ * client program shouldn't see any difference.)
+ */
+ assert((ad = archive_write_disk_new()) != NULL);
+ archive_write_disk_set_options(ad, 0);
+ verify_write_data(ad, 0);
+ verify_write_data_block(ad, 0);
+ assertEqualInt(0, archive_write_finish(ad));
+
+ assert((ad = archive_write_disk_new()) != NULL);
+ archive_write_disk_set_options(ad, ARCHIVE_EXTRACT_SPARSE);
+ verify_write_data(ad, 1);
+ verify_write_data_block(ad, 1);
+ assertEqualInt(0, archive_write_finish(ad));
+
+}
projects / thirdparty / libarchive.git / commitdiff
