mirror of
https://github.com/radareorg/radare2.git
synced 2024-12-12 15:38:09 +00:00
721 lines
16 KiB
C
721 lines
16 KiB
C
/* radare2 - LGPL - Copyright 2011-2021 - pancake */
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#include <r_fs.h>
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#include "config.h"
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#include "types.h"
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#include <errno.h>
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#if WITH_GPL
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# ifndef USE_GRUB
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# define USE_GRUB 1
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# endif
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#endif
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#if WITH_GPL && USE_GRUB
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#include "../../shlr/grub/include/grubfs.h"
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#include "../../shlr/grub/include/grub/msdos_partition.h"
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#endif
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R_LIB_VERSION (r_fs);
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static RFSPlugin* fs_static_plugins[] = {
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R_FS_STATIC_PLUGINS
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};
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R_API RFS* r_fs_new(void) {
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int i;
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RFSPlugin* static_plugin;
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RFS* fs = R_NEW0 (RFS);
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if (fs) {
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fs->view = R_FS_VIEW_NORMAL;
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fs->roots = r_list_new ();
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if (!fs->roots) {
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r_fs_free (fs);
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return NULL;
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}
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fs->roots->free = (RListFree) r_fs_root_free;
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fs->plugins = r_list_new ();
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if (!fs->plugins) {
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r_fs_free (fs);
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return NULL;
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}
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fs->plugins->free = free;
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// XXX fs->roots->free = r_fs_plugin_free;
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for (i = 0; fs_static_plugins[i]; i++) {
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static_plugin = R_NEW (RFSPlugin);
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if (!static_plugin) {
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continue;
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}
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memcpy (static_plugin, fs_static_plugins[i], sizeof (RFSPlugin));
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r_fs_add (fs, static_plugin);
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free (static_plugin);
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}
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}
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return fs;
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}
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R_API RFSPlugin* r_fs_plugin_get(RFS* fs, const char* name) {
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RListIter* iter;
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RFSPlugin* p;
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if (!fs || !name) {
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return NULL;
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}
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r_list_foreach (fs->plugins, iter, p) {
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if (!strcmp (p->name, name)) {
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return p;
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}
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}
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return NULL;
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}
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R_API void r_fs_free(RFS* fs) {
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if (!fs) {
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return;
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}
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//r_io_free (fs->iob.io);
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//root makes use of plugin so revert to avoid UaF
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r_list_free (fs->roots);
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r_list_free (fs->plugins);
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free (fs);
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}
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/* plugins */
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R_API void r_fs_add(RFS* fs, RFSPlugin* p) {
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// TODO: find coliding plugin name
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if (p && p->init) {
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p->init ();
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}
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RFSPlugin* sp = R_NEW0 (RFSPlugin);
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if (sp) {
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if (p) {
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memcpy (sp, p, sizeof (RFSPlugin));
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}
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r_list_append (fs->plugins, sp);
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}
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}
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R_API void r_fs_del(RFS* fs, RFSPlugin* p) {
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// TODO: implement r_fs_del
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}
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/* mountpoint */
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R_API RFSRoot* r_fs_mount(RFS* fs, const char* fstype, const char* path, ut64 delta) {
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RFSPlugin* p;
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RFSRoot* root;
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RListIter* iter;
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char* str;
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int len, lenstr;
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char *heapFsType = NULL;
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if (path[0] != '/') {
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eprintf ("r_fs_mount: invalid mountpoint %s\n", path);
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return NULL;
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}
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if (!fstype || !*fstype) {
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heapFsType = r_fs_name (fs, delta);
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fstype = (const char *)heapFsType;
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}
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if (!(p = r_fs_plugin_get (fs, fstype))) {
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// eprintf ("r_fs_mount: Invalid filesystem type\n");
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free (heapFsType);
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return NULL;
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}
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str = strdup (path);
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if (!str) {
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free (heapFsType);
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return NULL;
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}
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r_str_trim_path (str);
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if (*str && strchr (str + 1, '/')) {
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eprintf ("r_fs_mount: mountpoint must have no subdirectories\n");
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free (heapFsType);
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return NULL;
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}
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/* Check if path exists */
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r_list_foreach (fs->roots, iter, root) {
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len = strlen (root->path);
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lenstr = strlen (str);
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if (!strncmp (str, root->path, len)) {
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if (len < lenstr && str[len] != '/') {
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continue;
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}
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if (len > lenstr && root->path[lenstr] == '/') {
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continue;
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}
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eprintf ("r_fs_mount: Invalid mount point\n");
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free (str);
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free (heapFsType);
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return NULL;
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}
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}
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RFSFile* file = r_fs_open (fs, str, false);
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if (file) {
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r_fs_close (fs, file);
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eprintf ("r_fs_mount: Invalid mount point\n");
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free (heapFsType);
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free (str);
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return NULL;
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}
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RList *list = r_fs_dir (fs, str);
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if (!r_list_empty (list)) {
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//XXX: list need free ??
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eprintf ("r_fs_mount: Invalid mount point\n");
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free (str);
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free (heapFsType);
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return NULL;
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}
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// TODO: we should just construct the root with the rfs instance
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root = r_fs_root_new (str, delta);
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root->p = p;
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root->iob = fs->iob;
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root->cob = fs->cob;
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if (!p->mount (root)) {
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free (str);
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free (heapFsType);
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r_fs_root_free (root);
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return NULL;
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}
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r_list_append (fs->roots, root);
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eprintf ("Mounted %s on %s at 0x%" PFMT64x "\n", fstype, str, delta);
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free (str);
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free (heapFsType);
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return root;
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}
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static inline bool r_fs_match(const char* root, const char* path, int len) {
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return (!strncmp (path, root, len));
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}
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R_API bool r_fs_umount(RFS* fs, const char* path) {
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int len;
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RFSRoot* root;
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RListIter* iter, * riter = NULL;
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if (!path) {
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return false;
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}
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r_list_foreach (fs->roots, iter, root) {
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len = strlen (root->path);
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if (r_fs_match (path, root->path, len)) {
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riter = iter;
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}
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}
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if (riter) {
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r_list_delete (fs->roots, riter);
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return true;
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}
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return false;
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}
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R_API RList* r_fs_root(RFS* fs, const char* p) {
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RList* roots;
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RFSRoot* root;
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RListIter* iter;
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int len, olen;
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char* path = strdup (p);
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if (!path) {
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return NULL;
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}
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roots = r_list_new ();
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r_str_trim_path (path);
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r_list_foreach (fs->roots, iter, root) {
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len = strlen (root->path);
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if (r_fs_match (path, root->path, len)) {
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olen = strlen (path);
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if (len == 1 || olen == len) {
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r_list_append (roots, root);
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} else if (olen > len && path[len] == '/') {
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r_list_append (roots, root);
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}
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}
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}
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free (path);
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return roots;
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}
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/* filez */
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R_API RFSFile* r_fs_open(RFS* fs, const char* p, bool create) {
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RFSRoot* root;
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RListIter* iter;
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RFSFile* f = NULL;
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const char* dir;
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char* path = r_str_trim_dup (p);
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r_str_trim_path (path);
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RList *roots = r_fs_root (fs, path);
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if (!r_list_empty (roots)) {
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r_list_foreach (roots, iter, root) {
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if (create) {
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if (root && root->p && root->p->write) {
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f = r_fs_file_new (root, path + strlen (root->path));
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break;
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}
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continue;
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}
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if (root && root->p && root->p->open) {
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if (strlen (root->path) == 1) {
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dir = path;
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} else {
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dir = path + strlen (root->path);
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}
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f = root->p->open (root, dir, false);
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if (f) {
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break;
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}
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}
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}
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}
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free (roots);
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free (path);
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return f;
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}
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// NOTE: close doesnt free
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R_API void r_fs_close(RFS* fs, RFSFile* file) {
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if (fs && file) {
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R_FREE (file->data);
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if (file->p && file->p->close) {
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file->p->close (file);
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}
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}
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}
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R_API int r_fs_write(RFS* fs, RFSFile* file, ut64 addr, const ut8 *data, int len) {
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if (len < 1) {
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return -1;
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}
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if (fs && file) {
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// TODO: fill file->data ? looks like dupe of rbuffer
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if (file->p && file->p->write) {
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return file->p->write (file, addr, data, len);;
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}
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eprintf ("r_fs_write: file->p->write is null\n");
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}
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return -1;
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}
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R_API int r_fs_read(RFS* fs, RFSFile* file, ut64 addr, int len) {
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if (len < 1) {
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eprintf ("r_fs_read: too short read\n");
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return -1;
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}
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if (fs && file) {
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if (file->p && file->p->read) {
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if (!file->data) {
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free (file->data);
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file->data = calloc (1, len + 1);
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}
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return file->p->read (file, addr, len);
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} else {
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eprintf ("r_fs_read: file->p->read is null\n");
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}
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}
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return -1;
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}
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R_API RList* r_fs_dir(RFS* fs, const char* p) {
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RList *ret = NULL;
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RFSRoot* root;
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RListIter* iter;
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const char* dir;
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char* path = strdup (p);
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r_str_trim_path (path);
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RList *roots = r_fs_root (fs, path);
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r_list_foreach (roots, iter, root) {
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if (root) {
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if (strlen (root->path) == 1) {
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dir = path;
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} else {
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dir = path + strlen (root->path);
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}
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if (!*dir) {
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dir = "/";
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}
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ret = root->p->dir (root, dir, fs->view);
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if (ret) {
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break;
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}
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}
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}
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free (roots);
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free (path);
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return ret;
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}
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R_API int r_fs_dir_dump(RFS* fs, const char* path, const char* name) {
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RList* list;
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RListIter* iter;
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RFSFile* file, * item;
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char* str, * npath;
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list = r_fs_dir (fs, path);
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if (!list) {
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return false;
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}
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if (!r_sys_mkdir (name)) {
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if (r_sys_mkdir_failed ()) {
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eprintf ("Cannot create \"%s\"\n", name);
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return false;
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}
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}
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r_list_foreach (list, iter, file) {
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if (!strcmp (file->name, ".") || !strcmp (file->name, "..")) {
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continue;
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}
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str = (char*) malloc (strlen (name) + strlen (file->name) + 2);
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if (!str) {
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return false;
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}
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strcpy (str, name);
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strcat (str, "/");
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strcat (str, file->name);
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npath = malloc (strlen (path) + strlen (file->name) + 2);
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if (!npath) {
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free (str);
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return false;
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}
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strcpy (npath, path);
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strcat (npath, "/");
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strcat (npath, file->name);
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switch (file->type) {
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// DON'T FOLLOW MOUNTPOINTS
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case R_FS_FILE_TYPE_DIRECTORY:
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if (!r_fs_dir_dump (fs, npath, str)) {
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free (npath);
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free (str);
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return false;
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}
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break;
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case R_FS_FILE_TYPE_REGULAR:
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item = r_fs_open (fs, npath, false);
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if (item) {
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r_fs_read (fs, item, 0, item->size);
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if (!r_file_dump (str, item->data, item->size, 0)) {
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free (npath);
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free (str);
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return false;
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}
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r_fs_close (fs, item);
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}
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break;
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}
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free (npath);
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free (str);
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}
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return true;
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}
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static void r_fs_find_off_aux(RFS* fs, const char* name, ut64 offset, RList* list) {
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RList* dirs;
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RListIter* iter;
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RFSFile* item, * file;
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char* found = NULL;
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dirs = r_fs_dir (fs, name);
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r_list_foreach (dirs, iter, item) {
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if (!strcmp (item->name, ".") || !strcmp (item->name, "..")) {
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continue;
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}
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found = (char*) malloc (strlen (name) + strlen (item->name) + 2);
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if (!found) {
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break;
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}
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strcpy (found, name);
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strcat (found, "/");
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strcat (found, item->name);
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if (item->type == R_FS_FILE_TYPE_DIRECTORY) {
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r_fs_find_off_aux (fs, found, offset, list);
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} else {
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file = r_fs_open (fs, found, false);
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if (file) {
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r_fs_read (fs, file, 0, file->size);
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if (file->off == offset) {
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r_list_append (list, found);
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}
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r_fs_close (fs, file);
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}
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}
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free (found);
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}
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}
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R_API RList* r_fs_find_off(RFS* fs, const char* name, ut64 off) {
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RList* list = r_list_new ();
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if (!list) {
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return NULL;
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}
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list->free = free;
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r_fs_find_off_aux (fs, name, off, list);
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return list;
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}
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static void r_fs_find_name_aux(RFS* fs, const char* name, const char* glob, RList* list) {
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RList* dirs;
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RListIter* iter;
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RFSFile* item;
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char* found;
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dirs = r_fs_dir (fs, name);
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r_list_foreach (dirs, iter, item) {
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if (r_str_glob (item->name, glob)) {
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found = (char*) malloc (strlen (name) + strlen (item->name) + 2);
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if (!found) {
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break;
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}
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strcpy (found, name);
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strcat (found, "/");
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strcat (found, item->name);
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r_list_append (list, found);
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}
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if (!strcmp (item->name, ".") || !strcmp (item->name, "..")) {
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continue;
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}
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if (item->type == R_FS_FILE_TYPE_DIRECTORY) {
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found = (char*) malloc (strlen (name) + strlen (item->name) + 2);
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if (!found) {
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break;
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}
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strcpy (found, name);
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strcat (found, "/");
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strcat (found, item->name);
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r_fs_find_name_aux (fs, found, glob, list);
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free (found);
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}
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}
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}
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R_API RList* r_fs_find_name(RFS* fs, const char* name, const char* glob) {
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RList* list = r_list_newf (free);
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if (list) {
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r_fs_find_name_aux (fs, name, glob, list);
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}
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return list;
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}
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R_API RFSFile* r_fs_slurp(RFS* fs, const char* path) {
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RFSFile* file = NULL;
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RFSRoot* root;
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RList* roots = r_fs_root (fs, path);
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RListIter* iter;
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r_list_foreach (roots, iter, root) {
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if (!root || !root->p) {
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continue;
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}
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if (root->p->open && root->p->read && root->p->close) {
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file = root->p->open (root, path, false);
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if (file) {
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root->p->read (file, 0, file->size); //file->data
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}else {
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eprintf ("r_fs_slurp: cannot open file\n");
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}
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} else {
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if (root->p->slurp) {
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free (roots);
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return root->p->slurp (root, path);
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}
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eprintf ("r_fs_slurp: null root->p->slurp\n");
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}
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}
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free (roots);
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return file;
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}
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#if USE_GRUB && WITH_GPL
|
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static int grub_parhook(void* disk, void* ptr, void* closure) {
|
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struct grub_partition* par = ptr;
|
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RList* list = (RList*) closure;
|
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RFSPartition* p = r_fs_partition_new (
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r_list_length (list),
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par->start * 512, 512 * par->len);
|
|
p->type = par->msdostype;
|
|
r_list_append (list, p);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int fs_parhook(void* disk, void* ptr, void* closure) {
|
|
RFSPartition* par = ptr;
|
|
RList* list = (RList*) closure;
|
|
r_list_append (list, par);
|
|
return 0;
|
|
}
|
|
|
|
#include "p/part_dos.c"
|
|
|
|
static RFSPartitionType partitions[] = {
|
|
/* LGPL code */
|
|
{"dos", &fs_part_dos, fs_parhook},
|
|
#if USE_GRUB
|
|
/* WARNING GPL code */
|
|
#if !__EMSCRIPTEN__
|
|
// wtf for some reason is not available on emscripten
|
|
{"msdos", &grub_msdos_partition_map, grub_parhook},
|
|
#endif
|
|
{"apple", &grub_apple_partition_map, grub_parhook},
|
|
{"sun", &grub_sun_partition_map, grub_parhook},
|
|
{"sunpc", &grub_sun_pc_partition_map, grub_parhook},
|
|
{"amiga", &grub_amiga_partition_map, grub_parhook},
|
|
{"bsdlabel", &grub_bsdlabel_partition_map, grub_parhook},
|
|
{"gpt", &grub_gpt_partition_map, grub_parhook},
|
|
#endif
|
|
// XXX: In BURG all bsd partition map are in bsdlabel
|
|
//{ "openbsdlabel", &grub_openbsd_partition_map },
|
|
//{ "netbsdlabel", &grub_netbsd_partition_map },
|
|
//{ "acorn", &grub_acorn_partition_map },
|
|
{ NULL }
|
|
};
|
|
|
|
R_API const char* r_fs_partition_type_get(int n) {
|
|
if (n < 0 || n >= R_FS_PARTITIONS_LENGTH) {
|
|
return NULL;
|
|
}
|
|
return partitions[n].name;
|
|
}
|
|
|
|
R_API int r_fs_partition_get_size(void) {
|
|
return R_FS_PARTITIONS_LENGTH;
|
|
}
|
|
|
|
R_API RList* r_fs_partitions(RFS* fs, const char* ptype, ut64 delta) {
|
|
int i, cur = -1;
|
|
for (i = 0; partitions[i].name; i++) {
|
|
if (!strcmp (ptype, partitions[i].name)) {
|
|
cur = i;
|
|
break;
|
|
}
|
|
}
|
|
if (cur != -1) {
|
|
RList* list = r_list_newf ((RListFree) r_fs_partition_free);
|
|
#if USE_GRUB
|
|
void* disk = NULL;
|
|
if (partitions[i].iterate == grub_parhook) {
|
|
struct grub_partition_map* gpt = partitions[i].ptr;
|
|
grubfs_bind_io (NULL, 0);
|
|
disk = (void*) grubfs_disk (&fs->iob);
|
|
if (gpt) {
|
|
gpt->iterate (disk,
|
|
(void*) partitions[i].iterate, list);
|
|
}
|
|
grubfs_free (disk);
|
|
} else {
|
|
#else
|
|
{
|
|
#endif
|
|
RFSPartitionIterator iterate = partitions[i].ptr;
|
|
iterate (fs, partitions[i].iterate, list); //grub_parhook, list);
|
|
}
|
|
return list;
|
|
}
|
|
if (ptype && *ptype) {
|
|
eprintf ("Unknown partition type '%s'.\n", ptype);
|
|
}
|
|
eprintf ("Supported types:\n");
|
|
for (i = 0; partitions[i].name; i++) {
|
|
eprintf (" %s", partitions[i].name);
|
|
}
|
|
eprintf ("\n");
|
|
return NULL;
|
|
}
|
|
|
|
R_API int r_fs_partition_type_str(const char* type) {
|
|
// TODO: implement
|
|
return 0;
|
|
}
|
|
|
|
R_API const char* r_fs_partition_type(const char* part, int type) {
|
|
#if USE_GRUB && WITH_GPL
|
|
// XXX: part is ignored O_o
|
|
switch (type) {
|
|
case GRUB_PC_PARTITION_TYPE_FAT12:
|
|
case GRUB_PC_PARTITION_TYPE_FAT16_GT32M:
|
|
case GRUB_PC_PARTITION_TYPE_FAT16_LT32M:
|
|
case GRUB_PC_PARTITION_TYPE_FAT32:
|
|
case GRUB_PC_PARTITION_TYPE_FAT32_LBA:
|
|
case GRUB_PC_PARTITION_TYPE_FAT16_LBA:
|
|
return strdup ("fat");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_EXT2FS:
|
|
return strdup ("ext2");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_MINIX:
|
|
case GRUB_PC_PARTITION_TYPE_LINUX_MINIX:
|
|
return strdup ("minix");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_NTFS:
|
|
return strdup ("ntfs");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_EXTENDED:
|
|
case GRUB_PC_PARTITION_TYPE_LINUX_EXTENDED:
|
|
return strdup ("ext3");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_HFS:
|
|
return strdup ("hfs");
|
|
|
|
case GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED: // fat?
|
|
case GRUB_PC_PARTITION_TYPE_EZD:
|
|
case GRUB_PC_PARTITION_TYPE_VSTAFS:
|
|
case GRUB_PC_PARTITION_TYPE_FREEBSD: // ufs
|
|
case GRUB_PC_PARTITION_TYPE_OPENBSD: // ufs
|
|
case GRUB_PC_PARTITION_TYPE_NETBSD: // ufs
|
|
case GRUB_PC_PARTITION_TYPE_GPT_DISK:
|
|
case GRUB_PC_PARTITION_TYPE_LINUX_RAID:
|
|
case GRUB_PC_PARTITION_TYPE_NONE:
|
|
default:
|
|
return NULL;
|
|
}
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
R_API char* r_fs_name(RFS* fs, ut64 offset) {
|
|
ut8 buf[1024];
|
|
int i, j, len, ret = false;
|
|
|
|
for (i = 0; fstypes[i].name; i++) {
|
|
RFSType* f = &fstypes[i];
|
|
len = R_MIN (f->buflen, sizeof (buf) - 1);
|
|
fs->iob.read_at (fs->iob.io, offset + f->bufoff, buf, len);
|
|
if (f->buflen > 0 && !memcmp (buf, f->buf, f->buflen)) {
|
|
ret = true;
|
|
len = R_MIN (f->bytelen, sizeof (buf));
|
|
fs->iob.read_at (fs->iob.io, offset + f->byteoff, buf, len);
|
|
// for (j = 0; j < f->bytelen; j++) {
|
|
for (j = 0; j < len; j++) {
|
|
if (buf[j] != f->byte) {
|
|
ret = false;
|
|
break;
|
|
}
|
|
}
|
|
if (ret) {
|
|
return strdup (f->name);
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
R_API void r_fs_view(RFS* fs, int view) {
|
|
fs->view = view;
|
|
}
|
|
|
|
R_API bool r_fs_check(RFS *fs, const char *p) {
|
|
RFSRoot *root;
|
|
RListIter *iter;
|
|
char* path = strdup (p);
|
|
if (!path) {
|
|
return false;
|
|
}
|
|
r_str_trim_path (path);
|
|
r_list_foreach (fs->roots, iter, root) {
|
|
if (r_fs_match (path, root->path, strlen (root->path))) {
|
|
free (path);
|
|
return true;
|
|
}
|
|
}
|
|
free (path);
|
|
return false;
|
|
}
|