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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "mkfs.h"
#include "util.h"
static int padd_file(int outfd, sqfs_super_t *super, options_t *opt)
{
size_t padd_sz = super->bytes_used % opt->devblksz;
uint8_t *buffer;
ssize_t ret;
if (padd_sz == 0)
return 0;
padd_sz = opt->devblksz - padd_sz;
buffer = calloc(1, padd_sz);
if (buffer == NULL) {
perror("padding output file to block size");
return -1;
}
ret = write_retry(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;
data_writer_t *data;
sqfs_super_t super;
compressor_t *cmp;
id_table_t idtbl;
options_t opt;
fstree_t fs;
int outfd;
process_command_line(&opt, argc, argv);
if (sqfs_super_init(&super, opt.blksz, opt.def_mtime, opt.compressor))
return EXIT_FAILURE;
if (id_table_init(&idtbl))
return EXIT_FAILURE;
outfd = open(opt.outfile, opt.outmode, 0644);
if (outfd < 0) {
perror(opt.outfile);
goto out_idtbl;
}
if (sqfs_super_write(&super, outfd))
goto out_outfd;
if (fstree_init(&fs, opt.blksz, opt.def_mtime, opt.def_mode,
opt.def_uid, opt.def_gid)) {
goto out_outfd;
}
if (opt.infile != NULL) {
if (fstree_from_file(&fs, opt.infile, opt.packdir))
goto out_fstree;
} else {
if (fstree_from_dir(&fs, opt.packdir))
goto out_fstree;
}
#ifdef WITH_SELINUX
if (opt.selinux != NULL) {
if (fstree_relabel_selinux(&fs, opt.selinux))
goto out_fstree;
}
#endif
fstree_xattr_deduplicate(&fs);
fstree_sort(&fs);
if (fstree_gen_inode_table(&fs))
goto out_fstree;
super.inode_count = fs.inode_tbl_size - 2;
cmp = compressor_create(super.compression_id, true, super.block_size,
opt.comp_extra);
if (cmp == NULL) {
fputs("Error creating compressor\n", stderr);
goto out_outfd;
}
ret = cmp->write_options(cmp, outfd);
if (ret < 0)
goto out_cmp;
if (ret > 0) {
super.flags |= SQFS_FLAG_COMPRESSOR_OPTIONS;
super.bytes_used += ret;
}
data = data_writer_create(&super, cmp, outfd);
if (data == NULL)
goto out_cmp;
if (write_data_to_image(data, &fs, &opt))
goto out_data;
if (sqfs_serialize_fstree(outfd, &super, &fs, cmp, &idtbl))
goto out_data;
if (data_writer_write_fragment_table(data))
goto out_data;
if (id_table_write(&idtbl, outfd, &super, cmp))
goto out_data;
if (write_xattr(outfd, &fs, &super, cmp))
goto out_data;
if (sqfs_super_write(&super, outfd))
goto out_data;
if (padd_file(outfd, &super, &opt))
goto out_data;
status = EXIT_SUCCESS;
out_data:
data_writer_destroy(data);
out_cmp:
cmp->destroy(cmp);
out_fstree:
fstree_cleanup(&fs);
out_outfd:
close(outfd);
out_idtbl:
id_table_cleanup(&idtbl);
return status;
}
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