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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "mkfs.h"
#include "util.h"
static int padd_file(sqfs_info_t *info)
{
size_t padd_sz = info->super.bytes_used % info->opt.devblksz;
uint8_t *buffer;
ssize_t ret;
if (padd_sz == 0)
return 0;
padd_sz = info->opt.devblksz - padd_sz;
buffer = calloc(1, padd_sz);
if (buffer == NULL) {
perror("padding output file to block size");
return -1;
}
ret = write_retry(info->outfd, buffer, padd_sz);
if (ret < 0) {
perror("Error padding squashfs image to page size");
free(buffer);
return -1;
}
if ((size_t)ret < padd_sz) {
fputs("Truncated write trying to padd squashfs image\n",
stderr);
return -1;
}
free(buffer);
return 0;
}
int main(int argc, char **argv)
{
int status = EXIT_FAILURE, ret;
sqfs_info_t info;
uint64_t start;
memset(&info, 0, sizeof(info));
process_command_line(&info.opt, argc, argv);
if (sqfs_super_init(&info.super, info.opt.blksz, info.opt.def_mtime,
info.opt.compressor)) {
return EXIT_FAILURE;
}
if (id_table_init(&info.idtbl))
return EXIT_FAILURE;
info.outfd = open(info.opt.outfile, info.opt.outmode, 0644);
if (info.outfd < 0) {
perror(info.opt.outfile);
goto out_idtbl;
}
if (sqfs_super_write(&info.super, info.outfd))
goto out_outfd;
if (fstree_init(&info.fs, info.opt.blksz, info.opt.def_mtime,
info.opt.def_mode, info.opt.def_uid,
info.opt.def_gid)) {
goto out_outfd;
}
switch (info.opt.mode) {
case PACK_FILE:
if (fstree_from_file(&info.fs, info.opt.infile))
goto out_fstree;
break;
case PACK_DIR:
if (fstree_from_dir(&info.fs, info.opt.infile))
goto out_fstree;
break;
default:
assert(0);
}
#ifdef WITH_SELINUX
if (info.opt.selinux != NULL) {
if (fstree_relabel_selinux(&info.fs, info.opt.selinux))
goto out_fstree;
}
#endif
fstree_xattr_deduplicate(&info.fs);
fstree_sort(&info.fs);
info.cmp = compressor_create(info.super.compression_id, true,
info.super.block_size,
info.opt.comp_extra);
if (info.cmp == NULL) {
fputs("Error creating compressor\n", stderr);
goto out_outfd;
}
ret = info.cmp->write_options(info.cmp, info.outfd);
if (ret < 0)
goto out_cmp;
if (ret > 0) {
info.super.flags |= SQFS_FLAG_COMPRESSOR_OPTIONS;
info.super.bytes_used += ret;
}
if (write_data_to_image(&info))
goto out_cmp;
if (sqfs_write_inodes(&info))
goto out_cmp;
info.super.fragment_entry_count = info.num_fragments;
if (sqfs_write_table(info.outfd, &info.super, info.fragments,
sizeof(info.fragments[0]), info.num_fragments,
&start, info.cmp)) {
goto out_cmp;
}
info.super.fragment_table_start = start;
if (id_table_write(&info.idtbl, info.outfd, &info.super, info.cmp))
goto out_cmp;
if (write_xattr(&info))
goto out_cmp;
if (sqfs_super_write(&info.super, info.outfd))
goto out_cmp;
if (padd_file(&info))
goto out_cmp;
status = EXIT_SUCCESS;
out_cmp:
free(info.fragments);
info.cmp->destroy(info.cmp);
out_fstree:
fstree_cleanup(&info.fs);
out_outfd:
close(info.outfd);
out_idtbl:
id_table_cleanup(&info.idtbl);
return status;
}
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