godot/drivers/unix/dir_access_unix.cpp
2019-06-26 15:08:25 +02:00

433 lines
10 KiB
C++

/*************************************************************************/
/* dir_access_unix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "dir_access_unix.h"
#if defined(UNIX_ENABLED) || defined(LIBC_FILEIO_ENABLED)
#include "core/list.h"
#include "core/os/memory.h"
#include "core/print_string.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef ANDROID_ENABLED
#include <sys/statvfs.h>
#endif
#ifdef HAVE_MNTENT
#include <mntent.h>
#endif
DirAccess *DirAccessUnix::create_fs() {
return memnew(DirAccessUnix);
}
Error DirAccessUnix::list_dir_begin() {
list_dir_end(); //close any previous dir opening!
//char real_current_dir_name[2048]; //is this enough?!
//getcwd(real_current_dir_name,2048);
//chdir(current_path.utf8().get_data());
dir_stream = opendir(current_dir.utf8().get_data());
//chdir(real_current_dir_name);
if (!dir_stream)
return ERR_CANT_OPEN; //error!
return OK;
}
bool DirAccessUnix::file_exists(String p_file) {
GLOBAL_LOCK_FUNCTION
if (p_file.is_rel_path())
p_file = current_dir.plus_file(p_file);
p_file = fix_path(p_file);
struct stat flags;
bool success = (stat(p_file.utf8().get_data(), &flags) == 0);
if (success && S_ISDIR(flags.st_mode)) {
success = false;
}
return success;
}
bool DirAccessUnix::dir_exists(String p_dir) {
GLOBAL_LOCK_FUNCTION
if (p_dir.is_rel_path())
p_dir = get_current_dir().plus_file(p_dir);
p_dir = fix_path(p_dir);
struct stat flags;
bool success = (stat(p_dir.utf8().get_data(), &flags) == 0);
return (success && S_ISDIR(flags.st_mode));
}
uint64_t DirAccessUnix::get_modified_time(String p_file) {
if (p_file.is_rel_path())
p_file = current_dir.plus_file(p_file);
p_file = fix_path(p_file);
struct stat flags;
bool success = (stat(p_file.utf8().get_data(), &flags) == 0);
if (success) {
return flags.st_mtime;
} else {
ERR_FAIL_V(0);
};
return 0;
};
String DirAccessUnix::get_next() {
if (!dir_stream)
return "";
dirent *entry;
entry = readdir(dir_stream);
if (entry == NULL) {
list_dir_end();
return "";
}
//typedef struct stat Stat;
struct stat flags;
String fname = fix_unicode_name(entry->d_name);
String f = current_dir.plus_file(fname);
if (stat(f.utf8().get_data(), &flags) == 0) {
if (S_ISDIR(flags.st_mode)) {
_cisdir = true;
} else {
_cisdir = false;
}
} else {
_cisdir = false;
}
_cishidden = (fname != "." && fname != ".." && fname.begins_with("."));
return fname;
}
bool DirAccessUnix::current_is_dir() const {
return _cisdir;
}
bool DirAccessUnix::current_is_hidden() const {
return _cishidden;
}
void DirAccessUnix::list_dir_end() {
if (dir_stream)
closedir(dir_stream);
dir_stream = 0;
_cisdir = false;
}
#if defined(HAVE_MNTENT) && defined(X11_ENABLED)
static bool _filter_drive(struct mntent *mnt) {
// Ignore devices that don't point to /dev
if (strncmp(mnt->mnt_fsname, "/dev", 4) != 0) {
return false;
}
// Accept devices mounted at common locations
if (strncmp(mnt->mnt_dir, "/media", 6) == 0 ||
strncmp(mnt->mnt_dir, "/mnt", 4) == 0 ||
strncmp(mnt->mnt_dir, "/home", 5) == 0 ||
strncmp(mnt->mnt_dir, "/run/media", 10) == 0) {
return true;
}
// Ignore everything else
return false;
}
#endif
static void _get_drives(List<String> *list) {
#if defined(HAVE_MNTENT) && defined(X11_ENABLED)
// Check /etc/mtab for the list of mounted partitions
FILE *mtab = setmntent("/etc/mtab", "r");
if (mtab) {
struct mntent mnt;
char strings[4096];
while (getmntent_r(mtab, &mnt, strings, sizeof(strings))) {
if (mnt.mnt_dir != NULL && _filter_drive(&mnt)) {
// Avoid duplicates
if (!list->find(mnt.mnt_dir)) {
list->push_back(mnt.mnt_dir);
}
}
}
endmntent(mtab);
}
#endif
// Add $HOME
const char *home = getenv("HOME");
if (home) {
// Only add if it's not a duplicate
if (!list->find(home)) {
list->push_back(home);
}
// Check $HOME/.config/gtk-3.0/bookmarks
char path[1024];
snprintf(path, 1024, "%s/.config/gtk-3.0/bookmarks", home);
FILE *fd = fopen(path, "r");
if (fd) {
char string[1024];
while (fgets(string, 1024, fd)) {
// Parse only file:// links
if (strncmp(string, "file://", 7) == 0) {
// Strip any unwanted edges on the strings and push_back if it's not a duplicate
String fpath = String(string + 7).strip_edges().split_spaces()[0].percent_decode();
if (!list->find(fpath)) {
list->push_back(fpath);
}
}
}
fclose(fd);
}
}
list->sort();
}
int DirAccessUnix::get_drive_count() {
List<String> list;
_get_drives(&list);
return list.size();
}
String DirAccessUnix::get_drive(int p_drive) {
List<String> list;
_get_drives(&list);
ERR_FAIL_INDEX_V(p_drive, list.size(), "");
return list[p_drive];
}
Error DirAccessUnix::make_dir(String p_dir) {
GLOBAL_LOCK_FUNCTION
if (p_dir.is_rel_path())
p_dir = get_current_dir().plus_file(p_dir);
p_dir = fix_path(p_dir);
bool success = (mkdir(p_dir.utf8().get_data(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) == 0);
int err = errno;
if (success) {
return OK;
};
if (err == EEXIST) {
return ERR_ALREADY_EXISTS;
};
return ERR_CANT_CREATE;
}
Error DirAccessUnix::change_dir(String p_dir) {
GLOBAL_LOCK_FUNCTION
p_dir = fix_path(p_dir);
// prev_dir is the directory we are changing out of
String prev_dir;
char real_current_dir_name[2048];
ERR_FAIL_COND_V(getcwd(real_current_dir_name, 2048) == NULL, ERR_BUG);
if (prev_dir.parse_utf8(real_current_dir_name))
prev_dir = real_current_dir_name; //no utf8, maybe latin?
// try_dir is the directory we are trying to change into
String try_dir = "";
if (p_dir.is_rel_path()) {
String next_dir = current_dir + "/" + p_dir;
next_dir = next_dir.simplify_path();
try_dir = next_dir;
} else {
try_dir = p_dir;
}
bool worked = (chdir(try_dir.utf8().get_data()) == 0); // we can only give this utf8
if (!worked) {
return ERR_INVALID_PARAMETER;
}
String base = _get_root_path();
if (base != String() && !try_dir.begins_with(base)) {
ERR_FAIL_COND_V(getcwd(real_current_dir_name, 2048) == NULL, ERR_BUG);
String new_dir;
new_dir.parse_utf8(real_current_dir_name);
if (!new_dir.begins_with(base)) {
try_dir = current_dir; //revert
}
}
// the directory exists, so set current_dir to try_dir
current_dir = try_dir;
ERR_FAIL_COND_V(chdir(prev_dir.utf8().get_data()) != 0, ERR_BUG);
return OK;
}
String DirAccessUnix::get_current_dir() {
String base = _get_root_path();
if (base != "") {
String bd = current_dir.replace_first(base, "");
if (bd.begins_with("/"))
return _get_root_string() + bd.substr(1, bd.length());
else
return _get_root_string() + bd;
}
return current_dir;
}
Error DirAccessUnix::rename(String p_path, String p_new_path) {
if (p_path.is_rel_path())
p_path = get_current_dir().plus_file(p_path);
p_path = fix_path(p_path);
if (p_new_path.is_rel_path())
p_new_path = get_current_dir().plus_file(p_new_path);
p_new_path = fix_path(p_new_path);
return ::rename(p_path.utf8().get_data(), p_new_path.utf8().get_data()) == 0 ? OK : FAILED;
}
Error DirAccessUnix::remove(String p_path) {
if (p_path.is_rel_path())
p_path = get_current_dir().plus_file(p_path);
p_path = fix_path(p_path);
struct stat flags;
if ((stat(p_path.utf8().get_data(), &flags) != 0))
return FAILED;
if (S_ISDIR(flags.st_mode))
return ::rmdir(p_path.utf8().get_data()) == 0 ? OK : FAILED;
else
return ::unlink(p_path.utf8().get_data()) == 0 ? OK : FAILED;
}
size_t DirAccessUnix::get_space_left() {
#ifndef NO_STATVFS
struct statvfs vfs;
if (statvfs(current_dir.utf8().get_data(), &vfs) != 0) {
return 0;
};
return vfs.f_bfree * vfs.f_bsize;
#else
// FIXME: Implement this.
return 0;
#endif
};
String DirAccessUnix::get_filesystem_type() const {
return ""; //TODO this should be implemented
}
DirAccessUnix::DirAccessUnix() {
dir_stream = 0;
_cisdir = false;
/* determine drive count */
// set current directory to an absolute path of the current directory
char real_current_dir_name[2048];
ERR_FAIL_COND(getcwd(real_current_dir_name, 2048) == NULL);
if (current_dir.parse_utf8(real_current_dir_name))
current_dir = real_current_dir_name;
change_dir(current_dir);
}
DirAccessUnix::~DirAccessUnix() {
list_dir_end();
}
#endif //posix_enabled