mirror of
https://github.com/pygos/pkg-utils.git
synced 2024-11-22 12:59:46 +01:00
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* SPDX-License-Identifier: ISC */
|
|
#include "sqfs/squashfs.h"
|
|
#include "util/util.h"
|
|
|
|
#include <endian.h>
|
|
#include <stdio.h>
|
|
|
|
static int sqfs_write_table(int outfd, sqfs_super_t *super, const void *data,
|
|
size_t entsize, size_t count, uint64_t *startblock,
|
|
compressor_stream_t *strm)
|
|
{
|
|
size_t ent_per_blocks = SQFS_META_BLOCK_SIZE / entsize;
|
|
uint64_t blocks[count / ent_per_blocks + 1];
|
|
size_t i, blkidx = 0, tblsize;
|
|
meta_writer_t *m;
|
|
ssize_t ret;
|
|
|
|
/* Write actual data. Whenever we cross a block boundary, remember
|
|
the block start offset */
|
|
m = meta_writer_create(outfd, strm);
|
|
if (m == NULL)
|
|
return -1;
|
|
|
|
for (i = 0; i < count; ++i) {
|
|
if (blkidx == 0 || m->written > blocks[blkidx - 1])
|
|
blocks[blkidx++] = m->written;
|
|
|
|
if (meta_writer_append(m, data, entsize))
|
|
goto fail;
|
|
|
|
data = (const char *)data + entsize;
|
|
}
|
|
|
|
if (meta_writer_flush(m))
|
|
goto fail;
|
|
|
|
for (i = 0; i < blkidx; ++i)
|
|
blocks[i] = htole64(blocks[i] + super->bytes_used);
|
|
|
|
super->bytes_used += m->written;
|
|
meta_writer_destroy(m);
|
|
|
|
/* write new index table */
|
|
*startblock = super->bytes_used;
|
|
tblsize = sizeof(blocks[0]) * blkidx;
|
|
|
|
ret = write_retry(outfd, blocks, tblsize);
|
|
if (ret < 0) {
|
|
perror("writing index table");
|
|
return -1;
|
|
}
|
|
|
|
if ((size_t)ret < tblsize) {
|
|
fputs("index table truncated\n", stderr);
|
|
return -1;
|
|
}
|
|
|
|
super->bytes_used += tblsize;
|
|
return 0;
|
|
fail:
|
|
meta_writer_destroy(m);
|
|
return -1;
|
|
}
|
|
|
|
int sqfs_write_fragment_table(int outfd, sqfs_super_t *super,
|
|
sqfs_fragment_t *fragments, size_t count,
|
|
compressor_stream_t *strm)
|
|
{
|
|
super->fragment_entry_count = count;
|
|
|
|
return sqfs_write_table(outfd, super, fragments, sizeof(fragments[0]),
|
|
count, &super->fragment_table_start, strm);
|
|
}
|
|
|
|
int sqfs_write_ids(int outfd, sqfs_super_t *super,
|
|
uint32_t *id_tbl, size_t count,
|
|
compressor_stream_t *strm)
|
|
{
|
|
size_t i;
|
|
int ret;
|
|
|
|
for (i = 0; i < count; ++i)
|
|
id_tbl[i] = htole32(id_tbl[i]);
|
|
|
|
ret = sqfs_write_table(outfd, super, id_tbl, sizeof(id_tbl[0]),
|
|
count, &super->id_table_start, strm);
|
|
|
|
for (i = 0; i < count; ++i)
|
|
id_tbl[i] = htole32(id_tbl[i]);
|
|
|
|
return ret;
|
|
}
|