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/*
* Copyright (c) 2020, Nicholas Hollett <niax@niax.co.uk>, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "Launcher.h"
#include <AK/FileSystemPath.h>
#include <AK/Function.h>
#include <LibCore/ConfigFile.h>
#include <LibCore/DirIterator.h>
#include <stdio.h>
#include <sys/stat.h>
namespace LaunchServer {
static Launcher* s_the;
static bool spawn(String executable, String argument);
Launcher::Launcher()
{
ASSERT(s_the == nullptr);
s_the = this;
}
Launcher& Launcher::the()
{
ASSERT(s_the);
return *s_the;
}
void Launcher::load_handlers(const String& af_dir)
{
auto load_hashtable = [](auto& af, auto& key) {
HashTable<String> table;
auto config_value = af->read_entry("Launcher", key, {});
for (auto& key : config_value.split(','))
table.set(key.to_lowercase());
return table;
};
Core::DirIterator dt(af_dir, Core::DirIterator::SkipDots);
while (dt.has_next()) {
auto af_name = dt.next_path();
auto af_path = String::format("%s/%s", af_dir.characters(), af_name.characters());
auto af = Core::ConfigFile::open(af_path);
if (!af->has_key("App", "Name") || !af->has_key("App", "Executable"))
continue;
auto app_name = af->read_entry("App", "Name");
auto app_executable = af->read_entry("App", "Executable");
auto file_types = load_hashtable(af, "FileTypes");
auto protocols = load_hashtable(af, "Protocols");
m_handlers.set(app_executable, { app_name, app_executable, file_types, protocols });
}
}
void Launcher::load_config(const Core::ConfigFile& cfg)
{
for (auto key : cfg.keys("FileType")) {
m_file_handlers.set(key.to_lowercase(), cfg.read_entry("FileType", key));
}
for (auto key : cfg.keys("Protocol")) {
m_protocol_handlers.set(key.to_lowercase(), cfg.read_entry("Protocol", key));
}
}
Vector<String> Launcher::handlers_for_url(const URL& url)
{
if (url.protocol() == "file")
return handlers_for_path(url.path());
return handlers_for(url.protocol(), m_protocol_handlers, [](auto& handler, auto& key) {
return handler.protocols.contains(key);
});
}
bool Launcher::open_url(const URL& url, const String& handler_name)
{
if (!handler_name.is_null())
return open_with_handler_name(url, handler_name);
if (url.protocol() == "file")
return open_file_url(url);
return open_with_user_preferences(m_protocol_handlers, url.protocol(), url.to_string(), "/bin/Browser");
}
bool Launcher::open_with_handler_name(const URL& url, const String& handler_name)
{
auto handler_optional = m_handlers.get(handler_name);
if (!handler_optional.has_value())
return false;
auto& handler = handler_optional.value();
String argument;
if (url.protocol() == "file")
argument = url.path();
else
argument = url.to_string();
return spawn(handler.executable, argument);
}
bool spawn(String executable, String argument)
{
pid_t child_pid = fork();
if (child_pid < 0) {
perror("fork");
return false;
}
if (child_pid == 0) {
if (execl(executable.characters(), executable.characters(), argument.characters(), nullptr) < 0) {
perror("execl");
return false;
}
ASSERT_NOT_REACHED();
}
return true;
}
bool Launcher::open_with_user_preferences(const HashMap<String, String>& user_preferences, const String key, const String argument, const String default_program)
{
auto program_path = user_preferences.get(key);
if (program_path.has_value())
return spawn(program_path.value(), argument);
// There wasn't a handler for this, so try the fallback instead
program_path = user_preferences.get("*");
if (program_path.has_value())
return spawn(program_path.value(), argument);
// Absolute worst case, try the provided default
return spawn(default_program, argument);
}
Vector<String> Launcher::handlers_for(const String& key, HashMap<String, String>& user_preference, Function<bool(Handler&, const String&)> handler_matches)
{
Vector<String> handlers;
auto user_preferred = user_preference.get(key);
if (user_preferred.has_value())
handlers.append(user_preferred.value());
for (auto& handler : m_handlers) {
// Skip over the existing item in the list
if (user_preferred.has_value() && user_preferred.value() == handler.value.executable)
continue;
if (handler_matches(handler.value, key))
handlers.append(handler.value.executable);
}
auto user_default = user_preference.get("*");
if (handlers.size() == 0 && user_default.has_value())
handlers.append(user_default.value());
return handlers;
}
Vector<String> Launcher::handlers_for_path(const String& path)
{
struct stat st;
if (stat(path.characters(), &st) < 0) {
perror("stat");
return {};
}
// TODO: Make directory opening configurable
if (S_ISDIR(st.st_mode))
return { "/bin/FileManager" };
auto extension = FileSystemPath(path).extension().to_lowercase();
return handlers_for(extension, m_file_handlers, [](auto& handler, auto& key) {
return handler.file_types.contains(key);
});
}
bool Launcher::open_file_url(const URL& url)
{
struct stat st;
if (stat(url.path().characters(), &st) < 0) {
perror("stat");
return false;
}
// TODO: Make directory opening configurable
if (S_ISDIR(st.st_mode))
return spawn("/bin/FileManager", url.path());
if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
return spawn(url.path(), {});
auto extension_parts = url.path().to_lowercase().split('.');
String extension = {};
if (extension_parts.size() > 1)
extension = extension_parts.last();
return open_with_user_preferences(m_file_handlers, extension, url.path(), "/bin/TextEdit");
}
}
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