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/* SPDX-License-Identifier: 0BSD */
/*
* list_files.c
*
* Copyright (C) 2020 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfs/compressor.h"
#include "sqfs/dir_reader.h"
#include "sqfs/id_table.h"
#include "sqfs/inode.h"
#include "sqfs/super.h"
#include "sqfs/io.h"
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
static void write_tree_dfs(const sqfs_tree_node_t *n)
{
const sqfs_tree_node_t *p;
unsigned int mask, level;
int i;
for (n = n->children; n != NULL; n = n->next) {
level = 0;
mask = 0;
for (p = n->parent; p->parent != NULL; p = p->parent) {
if (p->next != NULL)
mask |= 1 << level;
++level;
}
for (i = level - 1; i >= 0; --i)
fputs(mask & (1 << i) ? "│ " : " ", stdout);
fputs(n->next == NULL ? "└─ " : "├─ ", stdout);
fputs((const char *)n->name, stdout);
if (n->inode->base.type == SQFS_INODE_SLINK) {
printf(" ⭢ %.*s",
(int)n->inode->data.slink.target_size,
(const char *)n->inode->extra);
} else if (n->inode->base.type == SQFS_INODE_EXT_SLINK) {
printf(" ⭢ %.*s",
(int)n->inode->data.slink_ext.target_size,
(const char *)n->inode->extra);
}
fputc('\n', stdout);
write_tree_dfs(n);
}
}
int main(int argc, char **argv)
{
int ret, status = EXIT_FAILURE;
sqfs_compressor_config_t cfg;
sqfs_compressor_t *cmp;
sqfs_tree_node_t *root = NULL;
sqfs_id_table_t *idtbl;
sqfs_dir_reader_t *dr;
sqfs_file_t *file;
sqfs_super_t super;
/* open the SquashFS file we want to read */
if (argc != 2) {
fputs("Usage: list_files <squashfs-file>\n", stderr);
return EXIT_FAILURE;
}
file = sqfs_open_file(argv[1], SQFS_FILE_OPEN_READ_ONLY);
if (file == NULL) {
perror(argv[1]);
return EXIT_FAILURE;
}
/* read the super block, create a compressor and
process the compressor options */
if (sqfs_super_read(&super, file)) {
fprintf(stderr, "%s: error reading super block.\n", argv[1]);
goto out_fd;
}
sqfs_compressor_config_init(&cfg, super.compression_id,
super.block_size,
SQFS_COMP_FLAG_UNCOMPRESS);
ret = sqfs_compressor_create(&cfg, &cmp);
if (ret != 0) {
fprintf(stderr, "%s: error creating compressor: %d.\n",
argv[1], ret);
goto out_fd;
}
/* Create and read the UID/GID mapping table */
idtbl = sqfs_id_table_create(0);
if (idtbl == NULL) {
fputs("Error creating ID table.\n", stderr);
goto out_cmp;
}
if (sqfs_id_table_read(idtbl, file, &super, cmp)) {
fprintf(stderr, "%s: error loading ID table.\n", argv[1]);
goto out_id;
}
/* create a directory reader and scan the entire directory hiearchy */
dr = sqfs_dir_reader_create(&super, cmp, file, 0);
if (dr == NULL) {
fprintf(stderr, "%s: error creating directory reader.\n",
argv[1]);
goto out_id;
}
if (sqfs_dir_reader_get_full_hierarchy(dr, idtbl, NULL, 0, &root)) {
fprintf(stderr, "%s: error loading directory tree.\n",
argv[1]);
goto out;
}
/* fancy print the hierarchy */
printf("/\n");
write_tree_dfs(root);
/* cleanup */
status = EXIT_SUCCESS;
out:
if (root != NULL)
sqfs_dir_tree_destroy(root);
sqfs_drop(dr);
out_id:
sqfs_drop(idtbl);
out_cmp:
sqfs_drop(cmp);
out_fd:
sqfs_drop(file);
return status;
}
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