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-rw-r--r--tar/sqfs2tar.c688
1 files changed, 0 insertions, 688 deletions
diff --git a/tar/sqfs2tar.c b/tar/sqfs2tar.c
deleted file mode 100644
index 6d2a51a..0000000
--- a/tar/sqfs2tar.c
+++ /dev/null
@@ -1,688 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * sqfs2tar.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-#include "common.h"
-#include "tar.h"
-
-#include <getopt.h>
-#include <string.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-
-static struct option long_opts[] = {
- { "subdir", required_argument, NULL, 'd' },
- { "keep-as-dir", no_argument, NULL, 'k' },
- { "root-becomes", required_argument, NULL, 'r' },
- { "no-skip", no_argument, NULL, 's' },
- { "no-xattr", no_argument, NULL, 'X' },
- { "no-hard-links", no_argument, NULL, 'L' },
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, 'V' },
- { NULL, 0, NULL, 0 },
-};
-
-static const char *short_opts = "d:kr:sXLhV";
-
-static const char *usagestr =
-"Usage: sqfs2tar [OPTIONS...] <sqfsfile>\n"
-"\n"
-"Read an input squashfs archive and turn it into a tar archive, written\n"
-"to stdout.\n"
-"\n"
-"Possible options:\n"
-"\n"
-" --subdir, -d <dir> Unpack the given sub directory instead of the\n"
-" filesystem root. Can be specified more than\n"
-" once to select multiple directories. If only\n"
-" one is specified, it becomes the new root of\n"
-" node of the archive file system tree.\n"
-"\n"
-" --root-becomes, -r <dir> Turn the root inode into a directory with the\n"
-" specified name. Everything else will be stored\n"
-" inside this directory. The special value '.' is\n"
-" allowed to prefix all tar paths with './' and\n"
-" add an entry named '.' for the root inode.\n"
-" If this option isn't used, all meta data stored\n"
-" in the root inode IS LOST!\n"
-"\n"
-" --keep-as-dir, -k If --subdir is used only once, don't make the\n"
-" subdir the archive root, instead keep it as\n"
-" prefix for all unpacked files.\n"
-" Using --subdir more than once implies\n"
-" --keep-as-dir.\n"
-" --no-xattr, -X Do not copy extended attributes.\n"
-" --no-hard-links, -L Do not generate hard links. Produce duplicate\n"
-" entries instead.\n"
-"\n"
-" --no-skip, -s Abort if a file cannot be stored in a tar\n"
-" archive. By default, it is simply skipped\n"
-" and a warning is written to stderr.\n"
-"\n"
-" --help, -h Print help text and exit.\n"
-" --version, -V Print version information and exit.\n"
-"\n"
-"Examples:\n"
-"\n"
-"\tsqfs2tar rootfs.sqfs > rootfs.tar\n"
-"\tsqfs2tar rootfs.sqfs | gzip > rootfs.tar.gz\n"
-"\tsqfs2tar rootfs.sqfs | xz > rootfs.tar.xz\n"
-"\n";
-
-static const char *filename;
-static unsigned int record_counter;
-static bool dont_skip = false;
-static bool keep_as_dir = false;
-static bool no_xattr = false;
-static bool no_links = false;
-
-static char *root_becomes = NULL;
-static char **subdirs = NULL;
-static size_t num_subdirs = 0;
-static size_t max_subdirs = 0;
-
-static sqfs_xattr_reader_t *xr;
-static sqfs_data_reader_t *data;
-static sqfs_file_t *file;
-static sqfs_super_t super;
-static sqfs_hard_link_t *links = NULL;
-
-static FILE *out_file = NULL;
-
-static void process_args(int argc, char **argv)
-{
- size_t idx, new_count;
- int i, ret;
- void *new;
-
- for (;;) {
- i = getopt_long(argc, argv, short_opts, long_opts, NULL);
- if (i == -1)
- break;
-
- switch (i) {
- case 'd':
- if (num_subdirs == max_subdirs) {
- new_count = max_subdirs ? max_subdirs * 2 : 16;
- new = realloc(subdirs,
- new_count * sizeof(subdirs[0]));
- if (new == NULL)
- goto fail_errno;
-
- max_subdirs = new_count;
- subdirs = new;
- }
-
- subdirs[num_subdirs] = strdup(optarg);
- if (subdirs[num_subdirs] == NULL)
- goto fail_errno;
-
- if (canonicalize_name(subdirs[num_subdirs])) {
- perror(optarg);
- goto fail;
- }
-
- ++num_subdirs;
- break;
- case 'r':
- free(root_becomes);
- root_becomes = strdup(optarg);
- if (root_becomes == NULL)
- goto fail_errno;
-
- if (strcmp(root_becomes, "./") == 0)
- root_becomes[1] = '\0';
-
- if (strcmp(root_becomes, ".") == 0)
- break;
-
- if (canonicalize_name(root_becomes) != 0 ||
- strlen(root_becomes) == 0) {
- fprintf(stderr,
- "Invalid root directory '%s'.\n",
- optarg);
- goto fail_arg;
- }
- break;
- case 'k':
- keep_as_dir = true;
- break;
- case 's':
- dont_skip = true;
- break;
- case 'X':
- no_xattr = true;
- break;
- case 'L':
- no_links = true;
- break;
- case 'h':
- fputs(usagestr, stdout);
- goto out_success;
- case 'V':
- print_version("sqfs2tar");
- goto out_success;
- default:
- goto fail_arg;
- }
- }
-
- if (optind >= argc) {
- fputs("Missing argument: squashfs image\n", stderr);
- goto fail_arg;
- }
-
- filename = argv[optind++];
-
- if (optind < argc) {
- fputs("Unknown extra arguments\n", stderr);
- goto fail_arg;
- }
-
- if (num_subdirs > 1)
- keep_as_dir = true;
-
- return;
-fail_errno:
- perror("parsing options");
- goto fail;
-fail_arg:
- fputs("Try `sqfs2tar --help' for more information.\n", stderr);
- goto fail;
-fail:
- ret = EXIT_FAILURE;
- goto out_exit;
-out_success:
- ret = EXIT_SUCCESS;
- goto out_exit;
-out_exit:
- for (idx = 0; idx < num_subdirs; ++idx)
- free(subdirs[idx]);
- free(root_becomes);
- free(subdirs);
- exit(ret);
-}
-
-static int terminate_archive(void)
-{
- char buffer[1024];
-
- memset(buffer, '\0', sizeof(buffer));
-
- return write_retry("adding archive terminator", out_file,
- buffer, sizeof(buffer));
-}
-
-static int get_xattrs(const char *name, const sqfs_inode_generic_t *inode,
- tar_xattr_t **out)
-{
- tar_xattr_t *list = NULL, *ent;
- sqfs_xattr_value_t *value;
- sqfs_xattr_entry_t *key;
- sqfs_xattr_id_t desc;
- sqfs_u32 index;
- size_t i;
- int ret;
-
- if (xr == NULL)
- return 0;
-
- sqfs_inode_get_xattr_index(inode, &index);
-
- if (index == 0xFFFFFFFF)
- return 0;
-
- ret = sqfs_xattr_reader_get_desc(xr, index, &desc);
- if (ret) {
- sqfs_perror(name, "resolving xattr index", ret);
- return -1;
- }
-
- ret = sqfs_xattr_reader_seek_kv(xr, &desc);
- if (ret) {
- sqfs_perror(name, "locating xattr key-value pairs", ret);
- return -1;
- }
-
- for (i = 0; i < desc.count; ++i) {
- ret = sqfs_xattr_reader_read_key(xr, &key);
- if (ret) {
- sqfs_perror(name, "reading xattr key", ret);
- goto fail;
- }
-
- ret = sqfs_xattr_reader_read_value(xr, key, &value);
- if (ret) {
- sqfs_perror(name, "reading xattr value", ret);
- free(key);
- goto fail;
- }
-
- ent = calloc(1, sizeof(*ent) + strlen((const char *)key->key) +
- value->size + 2);
- if (ent == NULL) {
- perror("creating xattr entry");
- free(key);
- free(value);
- goto fail;
- }
-
- ent->key = ent->data;
- strcpy(ent->key, (const char *)key->key);
-
- ent->value = (sqfs_u8 *)ent->key + strlen(ent->key) + 1;
- memcpy(ent->value, value->value, value->size + 1);
-
- ent->value_len = value->size;
- ent->next = list;
- list = ent;
-
- free(key);
- free(value);
- }
-
- *out = list;
- return 0;
-fail:
- while (list != NULL) {
- ent = list;
- list = list->next;
- free(ent);
- }
- return -1;
-}
-
-static char *assemble_tar_path(char *name, bool is_dir)
-{
- size_t len, new_len;
- char *temp;
- (void)is_dir;
-
- if (root_becomes == NULL && !is_dir)
- return name;
-
- new_len = strlen(name);
- if (root_becomes != NULL)
- new_len += strlen(root_becomes) + 1;
- if (is_dir)
- new_len += 1;
-
- temp = realloc(name, new_len + 1);
- if (temp == NULL) {
- perror("assembling tar entry filename");
- free(name);
- return NULL;
- }
-
- name = temp;
-
- if (root_becomes != NULL) {
- len = strlen(root_becomes);
-
- memmove(name + len + 1, name, strlen(name) + 1);
- memcpy(name, root_becomes, len);
- name[len] = '/';
- }
-
- if (is_dir) {
- len = strlen(name);
-
- if (len == 0 || name[len - 1] != '/') {
- name[len++] = '/';
- name[len] = '\0';
- }
- }
-
- return name;
-}
-
-static int write_tree_dfs(const sqfs_tree_node_t *n)
-{
- tar_xattr_t *xattr = NULL, *xit;
- sqfs_hard_link_t *lnk = NULL;
- char *name, *target;
- struct stat sb;
- size_t len;
- int ret;
-
- inode_stat(n, &sb);
-
- if (n->parent == NULL) {
- if (root_becomes == NULL)
- goto skip_hdr;
-
- len = strlen(root_becomes);
- name = malloc(len + 2);
- if (name == NULL) {
- perror("creating root directory");
- return -1;
- }
-
- memcpy(name, root_becomes, len);
- name[len] = '/';
- name[len + 1] = '\0';
- } else {
- if (!is_filename_sane((const char *)n->name, false)) {
- fprintf(stderr, "Found a file named '%s', skipping.\n",
- n->name);
- if (dont_skip) {
- fputs("Not allowed to skip files, aborting!\n",
- stderr);
- return -1;
- }
- return 0;
- }
-
- name = sqfs_tree_node_get_path(n);
- if (name == NULL) {
- perror("resolving tree node path");
- return -1;
- }
-
- if (canonicalize_name(name))
- goto out_skip;
-
- for (lnk = links; lnk != NULL; lnk = lnk->next) {
- if (lnk->inode_number == n->inode->base.inode_number) {
- if (strcmp(name, lnk->target) == 0)
- lnk = NULL;
- break;
- }
- }
-
- name = assemble_tar_path(name, S_ISDIR(sb.st_mode));
- if (name == NULL)
- return -1;
- }
-
- if (lnk != NULL) {
- ret = write_hard_link(out_file, &sb, name, lnk->target,
- record_counter++);
- free(name);
- return ret;
- }
-
- if (!no_xattr) {
- if (get_xattrs(name, n->inode, &xattr)) {
- free(name);
- return -1;
- }
- }
-
- target = S_ISLNK(sb.st_mode) ? (char *)n->inode->extra : NULL;
- ret = write_tar_header(out_file, &sb, name, target, xattr,
- record_counter++);
-
- while (xattr != NULL) {
- xit = xattr;
- xattr = xattr->next;
- free(xit);
- }
-
- if (ret > 0)
- goto out_skip;
-
- if (ret < 0) {
- free(name);
- return -1;
- }
-
- if (S_ISREG(sb.st_mode)) {
- if (sqfs_data_reader_dump(name, data, n->inode, out_file,
- super.block_size, false)) {
- free(name);
- return -1;
- }
-
- if (padd_file(out_file, sb.st_size)) {
- free(name);
- return -1;
- }
- }
-
- free(name);
-skip_hdr:
- for (n = n->children; n != NULL; n = n->next) {
- if (write_tree_dfs(n))
- return -1;
- }
- return 0;
-out_skip:
- if (dont_skip) {
- fputs("Not allowed to skip files, aborting!\n", stderr);
- ret = -1;
- } else {
- fprintf(stderr, "Skipping %s\n", name);
- ret = 0;
- }
- free(name);
- return ret;
-}
-
-static sqfs_tree_node_t *tree_merge(sqfs_tree_node_t *lhs,
- sqfs_tree_node_t *rhs)
-{
- sqfs_tree_node_t *head = NULL, **next_ptr = &head;
- sqfs_tree_node_t *it, *l, *r;
- int diff;
-
- while (lhs->children != NULL && rhs->children != NULL) {
- diff = strcmp((const char *)lhs->children->name,
- (const char *)rhs->children->name);
-
- if (diff < 0) {
- it = lhs->children;
- lhs->children = lhs->children->next;
- } else if (diff > 0) {
- it = rhs->children;
- rhs->children = rhs->children->next;
- } else {
- l = lhs->children;
- lhs->children = lhs->children->next;
-
- r = rhs->children;
- rhs->children = rhs->children->next;
-
- it = tree_merge(l, r);
- }
-
- *next_ptr = it;
- next_ptr = &it->next;
- }
-
- it = (lhs->children != NULL ? lhs->children : rhs->children);
- *next_ptr = it;
-
- sqfs_dir_tree_destroy(rhs);
- lhs->children = head;
- return lhs;
-}
-
-int main(int argc, char **argv)
-{
- sqfs_tree_node_t *root = NULL, *subtree;
- int flags, ret, status = EXIT_FAILURE;
- sqfs_compressor_config_t cfg;
- sqfs_compressor_t *cmp;
- sqfs_id_table_t *idtbl;
- sqfs_dir_reader_t *dr;
- sqfs_hard_link_t *lnk;
- size_t i;
-
- process_args(argc, argv);
-
-#ifdef _WIN32
- _setmode(_fileno(stdout), _O_BINARY);
- out_file = stdout;
-#else
- out_file = freopen(NULL, "wb", stdout);
-#endif
-
- if (out_file == NULL) {
- perror("changing stdout to binary mode");
- goto out_dirs;
- }
-
- file = sqfs_open_file(filename, SQFS_FILE_OPEN_READ_ONLY);
- if (file == NULL) {
- perror(filename);
- goto out_dirs;
- }
-
- ret = sqfs_super_read(&super, file);
- if (ret) {
- sqfs_perror(filename, "reading super block", ret);
- goto out_fd;
- }
-
- sqfs_compressor_config_init(&cfg, super.compression_id,
- super.block_size,
- SQFS_COMP_FLAG_UNCOMPRESS);
-
- ret = sqfs_compressor_create(&cfg, &cmp);
-
-#ifdef WITH_LZO
- if (super.compression_id == SQFS_COMP_LZO && ret != 0)
- ret = lzo_compressor_create(&cfg, &cmp);
-#endif
-
- if (ret != 0) {
- sqfs_perror(filename, "creating compressor", ret);
- goto out_fd;
- }
-
- idtbl = sqfs_id_table_create(0);
-
- if (idtbl == NULL) {
- perror("creating ID table");
- goto out_cmp;
- }
-
- ret = sqfs_id_table_read(idtbl, file, &super, cmp);
- if (ret) {
- sqfs_perror(filename, "loading ID table", ret);
- goto out_id;
- }
-
- data = sqfs_data_reader_create(file, super.block_size, cmp);
- if (data == NULL) {
- sqfs_perror(filename, "creating data reader",
- SQFS_ERROR_ALLOC);
- goto out_id;
- }
-
- ret = sqfs_data_reader_load_fragment_table(data, &super);
- if (ret) {
- sqfs_perror(filename, "loading fragment table", ret);
- goto out_data;
- }
-
- dr = sqfs_dir_reader_create(&super, cmp, file);
- if (dr == NULL) {
- sqfs_perror(filename, "creating dir reader",
- SQFS_ERROR_ALLOC);
- goto out_data;
- }
-
- if (!no_xattr && !(super.flags & SQFS_FLAG_NO_XATTRS)) {
- xr = sqfs_xattr_reader_create(0);
- if (xr == NULL) {
- sqfs_perror(filename, "creating xattr reader",
- SQFS_ERROR_ALLOC);
- goto out_dr;
- }
-
- ret = sqfs_xattr_reader_load(xr, &super, file, cmp);
- if (ret) {
- sqfs_perror(filename, "loading xattr table", ret);
- goto out_xr;
- }
- }
-
- if (num_subdirs == 0) {
- ret = sqfs_dir_reader_get_full_hierarchy(dr, idtbl, NULL,
- 0, &root);
- if (ret) {
- sqfs_perror(filename, "loading filesystem tree", ret);
- goto out;
- }
- } else {
- flags = 0;
-
- if (keep_as_dir || num_subdirs > 1)
- flags = SQFS_TREE_STORE_PARENTS;
-
- for (i = 0; i < num_subdirs; ++i) {
- ret = sqfs_dir_reader_get_full_hierarchy(dr, idtbl,
- subdirs[i],
- flags,
- &subtree);
- if (ret) {
- sqfs_perror(subdirs[i], "loading filesystem "
- "tree", ret);
- goto out;
- }
-
- if (root == NULL) {
- root = subtree;
- } else {
- root = tree_merge(root, subtree);
- }
- }
- }
-
- if (!no_links) {
- if (sqfs_tree_find_hard_links(root, &links))
- goto out_tree;
-
- for (lnk = links; lnk != NULL; lnk = lnk->next) {
- lnk->target = assemble_tar_path(lnk->target, false);
- if (lnk->target == NULL)
- goto out;
- }
- }
-
- if (write_tree_dfs(root))
- goto out;
-
- if (terminate_archive())
- goto out;
-
- status = EXIT_SUCCESS;
- fflush(out_file);
-out:
- while (links != NULL) {
- lnk = links;
- links = links->next;
- free(lnk->target);
- free(lnk);
- }
-out_tree:
- if (root != NULL)
- sqfs_dir_tree_destroy(root);
-out_xr:
- if (xr != NULL)
- sqfs_destroy(xr);
-out_dr:
- sqfs_destroy(dr);
-out_data:
- sqfs_destroy(data);
-out_id:
- sqfs_destroy(idtbl);
-out_cmp:
- sqfs_destroy(cmp);
-out_fd:
- sqfs_destroy(file);
-out_dirs:
- for (i = 0; i < num_subdirs; ++i)
- free(subdirs[i]);
- free(subdirs);
- free(root_becomes);
- return status;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 22:53:59 +0000