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Merge pull request #11810 from marcelofg55/osx_export_improv

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OS X export code improvements
This commit is contained in:
Rémi Verschelde 2017-10-09 12:20:39 +02:00 committed by GitHub
commit e8b9cca614
8 changed files with 197 additions and 285 deletions
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2
core/os/os.h
View File

@ -204,7 +204,7 @@ public:
virtual String get_installed_templates_path() const { return ""; }
virtual String get_executable_path() const;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL) = 0;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false) = 0;
virtual Error kill(const ProcessID &p_pid) = 0;
virtual int get_process_id() const;

8
drivers/unix/os_unix.cpp
View File

@ -285,7 +285,7 @@ uint64_t OS_Unix::get_ticks_usec() const {
return longtime;
}
Error OS_Unix::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode) {
Error OS_Unix::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr) {
if (p_blocking && r_pipe) {
@ -297,7 +297,11 @@ Error OS_Unix::execute(const String &p_path, const List<String> &p_arguments, bo
argss += String(" \"") + p_arguments[i] + "\"";
}
argss += " 2>/dev/null"; //silence stderr
if (read_stderr) {
argss += " 2>&1"; // Read stderr too
} else {
argss += " 2>/dev/null"; //silence stderr
}
FILE *f = popen(argss.utf8().get_data(), "r");
ERR_FAIL_COND_V(!f, ERR_CANT_OPEN);

2
drivers/unix/os_unix.h
View File

@ -97,7 +97,7 @@ public:
virtual void delay_usec(uint32_t p_usec) const;
virtual uint64_t get_ticks_usec() const;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL);
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false);
virtual Error kill(const ProcessID &p_pid);
virtual int get_process_id() const;

462
platform/osx/export/export.cpp
View File

@ -53,9 +53,16 @@ class EditorExportPlatformOSX : public EditorExportPlatform {
void _fix_plist(const Ref<EditorExportPreset> &p_preset, Vector<uint8_t> &plist, const String &p_binary);
void _make_icon(const Ref<Image> &p_icon, Vector<uint8_t> &p_data);
#ifdef OSX_ENABLED
Error _code_sign(const Ref<EditorExportPreset> &p_preset, const String &p_path);
Error _create_dmg(const String &p_dmg_path, const String &p_pkg_name, const String &p_app_path_name);
#ifdef OSX_ENABLED
bool use_codesign() const { return true; }
bool use_dmg() const { return true; }
#else
bool use_codesign() const { return false; }
bool use_dmg() const { return false; }
#endif
protected:
@ -67,11 +74,7 @@ public:
virtual String get_os_name() const { return "OSX"; }
virtual Ref<Texture> get_logo() const { return logo; }
#ifdef OSX_ENABLED
virtual String get_binary_extension() const { return "dmg"; }
#else
virtual String get_binary_extension() const { return "zip"; }
#endif
virtual String get_binary_extension() const { return use_dmg() ? "dmg" : "zip"; }
virtual Error export_project(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &p_path, int p_flags = 0);
virtual bool can_export(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const;
@ -220,7 +223,6 @@ void EditorExportPlatformOSX::_fix_plist(const Ref<EditorExportPreset> &p_preset
}
}
#ifdef OSX_ENABLED
/**
If we're running the OSX version of the Godot editor we'll:
- export our application bundle to a temporary folder
@ -230,6 +232,7 @@ void EditorExportPlatformOSX::_fix_plist(const Ref<EditorExportPreset> &p_preset
Error EditorExportPlatformOSX::_code_sign(const Ref<EditorExportPreset> &p_preset, const String &p_path) {
List<String> args;
if (p_preset->get("codesign/entitlements") != "") {
/* this should point to our entitlements.plist file that sandboxes our application, I don't know if this should also be placed in our app bundle */
args.push_back("-entitlements");
@ -239,14 +242,25 @@ Error EditorExportPlatformOSX::_code_sign(const Ref<EditorExportPreset> &p_prese
args.push_back(p_preset->get("codesign/identity"));
args.push_back("-v"); /* provide some more feedback */
args.push_back(p_path);
Error err = OS::get_singleton()->execute("/usr/bin/codesign", args, true);
ERR_FAIL_COND_V(err, err);
String str;
Error err = OS::get_singleton()->execute("/usr/bin/codesign", args, true, NULL, &str, NULL, true);
ERR_FAIL_COND_V(err != OK, err);
print_line("codesign: " + str);
if (str.find("no identity found") != -1) {
EditorNode::add_io_error("codesign: no identity found");
return FAILED;
}
return OK;
}
Error EditorExportPlatformOSX::_create_dmg(const String &p_dmg_path, const String &p_pkg_name, const String &p_app_path_name) {
List<String> args;
OS::get_singleton()->move_to_trash(p_dmg_path);
args.push_back("create");
args.push_back(p_dmg_path);
args.push_back("-volname");
@ -255,8 +269,20 @@ Error EditorExportPlatformOSX::_create_dmg(const String &p_dmg_path, const Strin
args.push_back("HFS+");
args.push_back("-srcfolder");
args.push_back(p_app_path_name);
Error err = OS::get_singleton()->execute("/usr/bin/hdiutil", args, true);
ERR_FAIL_COND_V(err, err);
String str;
Error err = OS::get_singleton()->execute("/usr/bin/hdiutil", args, true, NULL, &str, NULL, true);
ERR_FAIL_COND_V(err != OK, err);
print_line("hdiutil returned: " + str);
if (str.find("create failed") != -1) {
if (str.find("File exists") != -1) {
EditorNode::add_io_error("hdiutil: create failed - file exists");
} else {
EditorNode::add_io_error("hdiutil: create failed");
}
return FAILED;
}
return OK;
}
@ -309,28 +335,45 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
else
pkg_name = "Unnamed";
// We're on OSX so we can export to DMG, but first we create our application bundle
String tmp_app_path_name = p_path.get_base_dir() + "/" + pkg_name + ".app";
print_line("Exporting to " + tmp_app_path_name);
DirAccess *tmp_app_path = DirAccess::create_for_path(tmp_app_path_name);
ERR_FAIL_COND_V(!tmp_app_path, ERR_CANT_CREATE)
Error err = OK;
String tmp_app_path_name = "";
zlib_filefunc_def io2 = io;
FileAccess *dst_f = NULL;
io2.opaque = &dst_f;
zipFile dst_pkg_zip = NULL;
///@TODO We should delete the existing application bundle especially if we attempt to code sign it, but what is a safe way to do this? Maybe call system function so it moves to trash?
// tmp_app_path->erase_contents_recursive();
if (use_dmg()) {
// We're on OSX so we can export to DMG, but first we create our application bundle
tmp_app_path_name = EditorSettings::get_singleton()->get_settings_path() + "/tmp/" + pkg_name + ".app";
print_line("Exporting to " + tmp_app_path_name);
DirAccess *tmp_app_path = DirAccess::create_for_path(tmp_app_path_name);
if (!tmp_app_path) {
err = ERR_CANT_CREATE;
}
// Create our folder structure or rely on unzip?
print_line("Creating " + tmp_app_path_name + "/Contents/MacOS");
Error dir_err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/MacOS");
ERR_FAIL_COND_V(dir_err, ERR_CANT_CREATE)
print_line("Creating " + tmp_app_path_name + "/Contents/Resources");
dir_err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/Resources");
ERR_FAIL_COND_V(dir_err, ERR_CANT_CREATE)
// Create our folder structure or rely on unzip?
if (err == OK) {
print_line("Creating " + tmp_app_path_name + "/Contents/MacOS");
err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/MacOS");
}
/* Now process our template */
if (err == OK) {
print_line("Creating " + tmp_app_path_name + "/Contents/Resources");
err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/Resources");
}
} else {
// Open our destination zip file
dst_pkg_zip = zipOpen2(p_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io2);
if (!dst_pkg_zip) {
err = ERR_CANT_CREATE;
}
}
// Now process our template
bool found_binary = false;
int total_size = 0;
while (ret == UNZ_OK) {
while (ret == UNZ_OK && err == OK) {
bool is_execute = false;
//get filename
@ -392,287 +435,152 @@ Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_p
print_line("ADDING: " + file + " size: " + itos(data.size()));
total_size += data.size();
/* write it into our application bundle */
file = tmp_app_path_name + "/" + file;
if (use_dmg()) {
// write it into our application bundle
file = tmp_app_path_name + "/" + file;
/* write the file, need to add chmod */
FileAccess *f = FileAccess::open(file, FileAccess::WRITE);
ERR_FAIL_COND_V(!f, ERR_CANT_CREATE)
f->store_buffer(data.ptr(), data.size());
f->close();
memdelete(f);
if (is_execute) {
// we need execute rights on this file
chmod(file.utf8().get_data(), 0755);
// write the file, need to add chmod
FileAccess *f = FileAccess::open(file, FileAccess::WRITE);
if (f) {
f->store_buffer(data.ptr(), data.size());
f->close();
if (is_execute) {
// Chmod with 0755 if the file is executable
f->_chmod(file, 0755);
}
memdelete(f);
} else {
err = ERR_CANT_CREATE;
}
} else {
// seems to already be set correctly
// chmod(file.utf8().get_data(), 0644);
// add it to our zip file
file = pkg_name + ".app/" + file;
zip_fileinfo fi;
fi.tmz_date.tm_hour = info.tmu_date.tm_hour;
fi.tmz_date.tm_min = info.tmu_date.tm_min;
fi.tmz_date.tm_sec = info.tmu_date.tm_sec;
fi.tmz_date.tm_mon = info.tmu_date.tm_mon;
fi.tmz_date.tm_mday = info.tmu_date.tm_mday;
fi.tmz_date.tm_year = info.tmu_date.tm_year;
fi.dosDate = info.dosDate;
fi.internal_fa = info.internal_fa;
fi.external_fa = info.external_fa;
int zerr = zipOpenNewFileInZip(dst_pkg_zip,
file.utf8().get_data(),
&fi,
NULL,
0,
NULL,
0,
NULL,
Z_DEFLATED,
Z_DEFAULT_COMPRESSION);
print_line("OPEN ERR: " + itos(zerr));
zerr = zipWriteInFileInZip(dst_pkg_zip, data.ptr(), data.size());
print_line("WRITE ERR: " + itos(zerr));
zipCloseFileInZip(dst_pkg_zip);
}
}
ret = unzGoToNextFile(src_pkg_zip);
}
/* we're done with our source zip */
// we're done with our source zip
unzClose(src_pkg_zip);
if (!found_binary) {
ERR_PRINTS("Requested template binary '" + binary_to_use + "' not found. It might be missing from your template archive.");
unzClose(src_pkg_zip);
return ERR_FILE_NOT_FOUND;
err = ERR_FILE_NOT_FOUND;
}
ep.step("Making PKG", 1);
if (err == OK) {
ep.step("Making PKG", 1);
String pack_path = tmp_app_path_name + "/Contents/Resources/" + pkg_name + ".pck";
Error err = save_pack(p_preset, pack_path);
// chmod(pack_path.utf8().get_data(), 0644);
if (use_dmg()) {
String pack_path = tmp_app_path_name + "/Contents/Resources/" + pkg_name + ".pck";
err = save_pack(p_preset, pack_path);
if (err) {
return err;
}
// see if we can code sign our new package
String identity = p_preset->get("codesign/identity");
if (err == OK && identity != "") {
ep.step("Code signing bundle", 2);
/* see if we can code sign our new package */
if (p_preset->get("codesign/identity") != "") {
ep.step("Code signing bundle", 2);
// the order in which we code sign is important, this is a bit of a shame or we could do this in our loop that extracts the files from our ZIP
/* the order in which we code sign is important, this is a bit of a shame or we could do this in our loop that extracts the files from our ZIP */
// start with our application
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/MacOS/" + pkg_name);
// start with our application
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/MacOS/" + pkg_name);
ERR_FAIL_COND_V(err, err);
///@TODO we should check the contents of /Contents/Frameworks for frameworks to sign
// we should probably loop through all resources and sign them?
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Resources/icon.icns");
ERR_FAIL_COND_V(err, err);
err = _code_sign(p_preset, pack_path);
ERR_FAIL_COND_V(err, err);
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Info.plist");
ERR_FAIL_COND_V(err, err);
}
/* and finally create a DMG */
ep.step("Making DMG", 3);
err = _create_dmg(p_path, pkg_name, tmp_app_path_name);
ERR_FAIL_COND_V(err, err);
return OK;
}
#else
/**
When exporting for OSX from any other platform we don't have access to code signing or creating DMGs so we'll wrap the bundle into a zip file.
Should probably find a nicer way to have just one export method instead of duplicating the method like this but I would the code got very
messy with switches inside of it.
**/
Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &p_path, int p_flags) {
String src_pkg_name;
EditorProgress ep("export", "Exporting for OSX", 104);
if (p_debug)
src_pkg_name = p_preset->get("custom_package/debug");
else
src_pkg_name = p_preset->get("custom_package/release");
if (src_pkg_name == "") {
String err;
src_pkg_name = find_export_template("osx.zip", &err);
if (src_pkg_name == "") {
EditorNode::add_io_error(err);
return ERR_FILE_NOT_FOUND;
}
}
FileAccess *src_f = NULL;
zlib_filefunc_def io = zipio_create_io_from_file(&src_f);
ep.step("Creating app", 0);
unzFile src_pkg_zip = unzOpen2(src_pkg_name.utf8().get_data(), &io);
if (!src_pkg_zip) {
EditorNode::add_io_error("Could not find template app to export:\n" + src_pkg_name);
return ERR_FILE_NOT_FOUND;
}
ERR_FAIL_COND_V(!src_pkg_zip, ERR_CANT_OPEN);
int ret = unzGoToFirstFile(src_pkg_zip);
String binary_to_use = "godot_osx_" + String(p_debug ? "debug" : "release") + ".";
int bits_mode = p_preset->get("application/bits_mode");
binary_to_use += String(bits_mode == 0 ? "fat" : bits_mode == 1 ? "64" : "32");
print_line("binary: " + binary_to_use);
String pkg_name;
if (p_preset->get("application/name") != "")
pkg_name = p_preset->get("application/name"); // app_name
else if (String(ProjectSettings::get_singleton()->get("application/config/name")) != "")
pkg_name = String(ProjectSettings::get_singleton()->get("application/config/name"));
else
pkg_name = "Unnamed";
/* Open our destination zip file */
zlib_filefunc_def io2 = io;
FileAccess *dst_f = NULL;
io2.opaque = &dst_f;
zipFile dst_pkg_zip = zipOpen2(p_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io2);
bool found_binary = false;
while (ret == UNZ_OK) {
//get filename
unz_file_info info;
char fname[16384];
ret = unzGetCurrentFileInfo(src_pkg_zip, &info, fname, 16384, NULL, 0, NULL, 0);
String file = fname;
print_line("READ: " + file);
Vector<uint8_t> data;
data.resize(info.uncompressed_size);
//read
unzOpenCurrentFile(src_pkg_zip);
unzReadCurrentFile(src_pkg_zip, data.ptr(), data.size());
unzCloseCurrentFile(src_pkg_zip);
//write
file = file.replace_first("osx_template.app/", "");
if (file == "Contents/Info.plist") {
print_line("parse plist");
_fix_plist(p_preset, data, pkg_name);
}
if (file.begins_with("Contents/MacOS/godot_")) {
if (file != "Contents/MacOS/" + binary_to_use) {
ret = unzGoToNextFile(src_pkg_zip);
continue; //ignore!
///@TODO we should check the contents of /Contents/Frameworks for frameworks to sign
}
found_binary = true;
file = "Contents/MacOS/" + pkg_name;
}
if (file == "Contents/Resources/icon.icns") {
//see if there is an icon
String iconpath;
if (p_preset->get("application/icon") != "")
iconpath = p_preset->get("application/icon");
else
iconpath = ProjectSettings::get_singleton()->get("application/config/icon");
print_line("icon? " + iconpath);
if (iconpath != "") {
Ref<Image> icon;
icon.instance();
icon->load(iconpath);
if (!icon->empty()) {
print_line("loaded?");
_make_icon(icon, data);
if (err == OK && identity != "") {
// we should probably loop through all resources and sign them?
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Resources/icon.icns");
}
if (err == OK && identity != "") {
err = _code_sign(p_preset, pack_path);
}
if (err == OK && identity != "") {
err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Info.plist");
}
// and finally create a DMG
if (err == OK) {
ep.step("Making DMG", 3);
err = _create_dmg(p_path, pkg_name, tmp_app_path_name);
}
// Clean up temporary .app dir
OS::get_singleton()->move_to_trash(tmp_app_path_name);
} else {
String pack_path = EditorSettings::get_singleton()->get_settings_path() + "/tmp/" + pkg_name + ".pck";
Error err = save_pack(p_preset, pack_path);
if (err == OK) {
zipOpenNewFileInZip(dst_pkg_zip,
(pkg_name + ".app/Contents/Resources/" + pkg_name + ".pck").utf8().get_data(),
NULL,
NULL,
0,
NULL,
0,
NULL,
Z_DEFLATED,
Z_DEFAULT_COMPRESSION);
FileAccess *pf = FileAccess::open(pack_path, FileAccess::READ);
if (pf) {
const int BSIZE = 16384;
uint8_t buf[BSIZE];
while (true) {
int r = pf->get_buffer(buf, BSIZE);
if (r <= 0)
break;
zipWriteInFileInZip(dst_pkg_zip, buf, r);
}
zipCloseFileInZip(dst_pkg_zip);
memdelete(pf);
} else {
err = ERR_CANT_OPEN;
}
}
//bleh?
}
if (data.size() > 0) {
print_line("ADDING: " + file + " size: " + itos(data.size()));
/* add it to our zip file */
file = pkg_name + ".app/" + file;
zip_fileinfo fi;
fi.tmz_date.tm_hour = info.tmu_date.tm_hour;
fi.tmz_date.tm_min = info.tmu_date.tm_min;
fi.tmz_date.tm_sec = info.tmu_date.tm_sec;
fi.tmz_date.tm_mon = info.tmu_date.tm_mon;
fi.tmz_date.tm_mday = info.tmu_date.tm_mday;
fi.tmz_date.tm_year = info.tmu_date.tm_year;
fi.dosDate = info.dosDate;
fi.internal_fa = info.internal_fa;
fi.external_fa = info.external_fa;
int err = zipOpenNewFileInZip(dst_pkg_zip,
file.utf8().get_data(),
&fi,
NULL,
0,
NULL,
0,
NULL,
Z_DEFLATED,
Z_DEFAULT_COMPRESSION);
print_line("OPEN ERR: " + itos(err));
err = zipWriteInFileInZip(dst_pkg_zip, data.ptr(), data.size());
print_line("WRITE ERR: " + itos(err));
zipCloseFileInZip(dst_pkg_zip);
}
ret = unzGoToNextFile(src_pkg_zip);
}
if (!found_binary) {
ERR_PRINTS("Requested template binary '" + binary_to_use + "' not found. It might be missing from your template archive.");
if (dst_pkg_zip) {
zipClose(dst_pkg_zip, NULL);
unzClose(src_pkg_zip);
return ERR_FILE_NOT_FOUND;
}
ep.step("Making PKG", 1);
String pack_path = EditorSettings::get_singleton()->get_settings_path() + "/tmp/" + pkg_name + ".pck";
Error err = save_pack(p_preset, pack_path);
if (err) {
zipClose(dst_pkg_zip, NULL);
unzClose(src_pkg_zip);
return err;
}
{
//write datapack
zipOpenNewFileInZip(dst_pkg_zip,
(pkg_name + ".app/Contents/Resources/" + pkg_name + ".pck").utf8().get_data(),
NULL,
NULL,
0,
NULL,
0,
NULL,
Z_DEFLATED,
Z_DEFAULT_COMPRESSION);
FileAccess *pf = FileAccess::open(pack_path, FileAccess::READ);
ERR_FAIL_COND_V(!pf, ERR_CANT_OPEN);
const int BSIZE = 16384;
uint8_t buf[BSIZE];
while (true) {
int r = pf->get_buffer(buf, BSIZE);
if (r <= 0)
break;
zipWriteInFileInZip(dst_pkg_zip, buf, r);
}
zipCloseFileInZip(dst_pkg_zip);
memdelete(pf);
}
zipClose(dst_pkg_zip, NULL);
unzClose(src_pkg_zip);
return OK;
}
#endif
bool EditorExportPlatformOSX::can_export(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const {

2
platform/uwp/os_uwp.cpp
View File

@ -674,7 +674,7 @@ void OSUWP::set_cursor_shape(CursorShape p_shape) {
cursor_shape = p_shape;
}
Error OSUWP::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode) {
Error OSUWP::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr) {
return FAILED;
};

2
platform/uwp/os_uwp.h
View File

@ -215,7 +215,7 @@ public:
virtual void delay_usec(uint32_t p_usec) const;
virtual uint64_t get_ticks_usec() const;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL);
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false);
virtual Error kill(const ProcessID &p_pid);
virtual bool has_environment(const String &p_var) const;

2
platform/windows/os_windows.cpp
View File

@ -1812,7 +1812,7 @@ void OS_Windows::set_cursor_shape(CursorShape p_shape) {
cursor_shape = p_shape;
}
Error OS_Windows::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode) {
Error OS_Windows::execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id, String *r_pipe, int *r_exitcode, bool read_stderr) {
if (p_blocking && r_pipe) {

2
platform/windows/os_windows.h
View File

@ -240,7 +240,7 @@ public:
virtual void delay_usec(uint32_t p_usec) const;
virtual uint64_t get_ticks_usec() const;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL);
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false);
virtual Error kill(const ProcessID &p_pid);
virtual int get_process_id() const;