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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* mkfs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "mkfs.h"
static int set_working_dir(options_t *opt)
{
const char *ptr;
char *path;
if (opt->packdir != NULL) {
if (chdir(opt->packdir)) {
perror(opt->packdir);
return -1;
}
return 0;
}
ptr = strrchr(opt->infile, '/');
if (ptr == NULL)
return 0;
path = strndup(opt->infile, ptr - opt->infile);
if (path == NULL) {
perror("constructing input directory path");
return -1;
}
if (chdir(path)) {
perror(path);
free(path);
return -1;
}
free(path);
return 0;
}
static int pack_files(sqfs_block_processor_t *data, fstree_t *fs,
options_t *opt)
{
sqfs_inode_generic_t **inode_ptr;
sqfs_u64 filesize;
sqfs_file_t *file;
tree_node_t *node;
const char *path;
char *node_path;
file_info_t *fi;
int flags;
int ret;
if (set_working_dir(opt))
return -1;
for (fi = fs->files; fi != NULL; fi = fi->next) {
if (fi->input_file == NULL) {
node = container_of(fi, tree_node_t, data.file);
node_path = fstree_get_path(node);
if (node_path == NULL) {
perror("reconstructing file path");
return -1;
}
ret = canonicalize_name(node_path);
assert(ret == 0);
path = node_path;
} else {
node_path = NULL;
path = fi->input_file;
}
if (!opt->cfg.quiet)
printf("packing %s\n", path);
file = sqfs_open_file(path, SQFS_FILE_OPEN_READ_ONLY);
if (file == NULL) {
perror(path);
free(node_path);
return -1;
}
flags = 0;
filesize = file->get_size(file);
if (opt->no_tail_packing && filesize > opt->cfg.block_size)
flags |= SQFS_BLK_DONT_FRAGMENT;
inode_ptr = (sqfs_inode_generic_t **)&fi->user_ptr;
ret = write_data_from_file(path, data, inode_ptr, file, flags);
sqfs_destroy(file);
free(node_path);
if (ret)
return -1;
}
return 0;
}
static int relabel_tree_dfs(const char *filename, sqfs_xattr_writer_t *xwr,
tree_node_t *n, void *selinux_handle)
{
char *path = fstree_get_path(n);
int ret;
if (path == NULL) {
perror("getting absolute node path for SELinux relabeling");
return -1;
}
ret = sqfs_xattr_writer_begin(xwr, 0);
if (ret) {
sqfs_perror(filename, "recording xattr key-value pairs", ret);
return -1;
}
if (selinux_relable_node(selinux_handle, xwr, n, path)) {
free(path);
return -1;
}
ret = sqfs_xattr_writer_end(xwr, &n->xattr_idx);
if (ret) {
sqfs_perror(filename, "flushing completed key-value pairs",
ret);
return -1;
}
free(path);
if (S_ISDIR(n->mode)) {
for (n = n->data.dir.children; n != NULL; n = n->next) {
if (relabel_tree_dfs(filename, xwr, n, selinux_handle))
return -1;
}
}
return 0;
}
static int read_fstree(fstree_t *fs, options_t *opt, sqfs_xattr_writer_t *xwr,
void *selinux_handle)
{
FILE *fp;
int ret;
fp = fopen(opt->infile, "rb");
if (fp == NULL) {
perror(opt->infile);
return -1;
}
ret = fstree_from_file(fs, opt->infile, fp);
fclose(fp);
if (ret == 0 && selinux_handle != NULL)
ret = relabel_tree_dfs(opt->cfg.filename, xwr,
fs->root, selinux_handle);
return ret;
}
static void override_owner_dfs(const options_t *opt, tree_node_t *n)
{
if (opt->force_uid)
n->uid = opt->force_uid_value;
if (opt->force_gid)
n->gid = opt->force_gid_value;
if (S_ISDIR(n->mode)) {
for (n = n->data.dir.children; n != NULL; n = n->next)
override_owner_dfs(opt, n);
}
}
int main(int argc, char **argv)
{
int status = EXIT_FAILURE;
void *sehnd = NULL;
sqfs_writer_t sqfs;
options_t opt;
process_command_line(&opt, argc, argv);
if (sqfs_writer_init(&sqfs, &opt.cfg))
return EXIT_FAILURE;
if (opt.selinux != NULL) {
sehnd = selinux_open_context_file(opt.selinux);
if (sehnd == NULL)
goto out;
}
if (opt.infile == NULL) {
if (fstree_from_dir(&sqfs.fs, opt.packdir, opt.dirscan_flags))
goto out;
} else {
if (read_fstree(&sqfs.fs, &opt, sqfs.xwr, sehnd))
goto out;
}
if (opt.force_uid || opt.force_gid)
override_owner_dfs(&opt, sqfs.fs.root);
if (fstree_post_process(&sqfs.fs))
goto out;
if (opt.infile == NULL) {
if (xattrs_from_dir(&sqfs.fs, opt.packdir, sehnd,
sqfs.xwr, opt.dirscan_flags)) {
goto out;
}
}
if (pack_files(sqfs.data, &sqfs.fs, &opt))
goto out;
if (sqfs_writer_finish(&sqfs, &opt.cfg))
goto out;
status = EXIT_SUCCESS;
out:
sqfs_writer_cleanup(&sqfs, status);
if (sehnd != NULL)
selinux_close_context_file(sehnd);
return status;
}
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