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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "meta_writer.h"
#include "table.h"
#include "util.h"
#include <unistd.h>
#include <stdio.h>
int sqfs_serialize_fstree(int outfd, sqfs_super_t *super, fstree_t *fs,
compressor_t *cmp, id_table_t *idtbl)
{
meta_writer_t *im, *dm;
uint8_t buffer[1024];
uint32_t offset;
uint64_t block;
size_t i, diff;
ssize_t ret;
FILE *tmp;
int tmpfd;
tmp = tmpfile();
if (tmp == NULL) {
perror("tmpfile");
return -1;
}
tmpfd = fileno(tmp);
im = meta_writer_create(outfd, cmp);
if (im == NULL)
goto fail_tmp;
dm = meta_writer_create(tmpfd, cmp);
if (dm == NULL)
goto fail_im;
for (i = 2; i < fs->inode_tbl_size; ++i) {
if (meta_writer_write_inode(fs, idtbl, im, dm,
fs->inode_table[i])) {
goto fail;
}
}
if (meta_writer_flush(im))
goto fail;
if (meta_writer_flush(dm))
goto fail;
super->root_inode_ref = fs->root->inode_ref;
meta_writer_get_position(im, &block, &offset);
super->inode_table_start = super->bytes_used;
super->bytes_used += block;
super->directory_table_start = super->bytes_used;
meta_writer_get_position(dm, &block, &offset);
super->bytes_used += block;
if (lseek(tmpfd, 0, SEEK_SET) == (off_t)-1) {
perror("rewind on directory temp file");
goto fail;
}
for (;;) {
ret = read_retry(tmpfd, buffer, sizeof(buffer));
if (ret < 0) {
perror("read from temp file");
goto fail;
}
if (ret == 0)
break;
diff = ret;
ret = write_retry(outfd, buffer, diff);
if (ret < 0) {
perror("write to image file");
goto fail;
}
if ((size_t)ret < diff) {
fputs("copying meta data to image file: "
"truncated write\n", stderr);
goto fail;
}
}
meta_writer_destroy(dm);
meta_writer_destroy(im);
fclose(tmp);
return 0;
fail:
meta_writer_destroy(dm);
fail_im:
meta_writer_destroy(im);
fail_tmp:
fclose(tmp);
return -1;
}
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