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Everywhere: Replace some uses of fork/exec with posix_spawn

Browse source 
It's less code, and it's potentially more efficient once
posix_spawn is a real syscall.
This commit is contained in:
Nico Weber 2020-06-28 13:40:10 -04:00 • committed by Andreas Kling
parent 301ac3c7e5
commit 12cbc4ad0d
11 changed files with 65 additions and 101 deletions
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27
Applications/FileManager/main.cpp
View file

@ -58,6 +58,7 @@
#include <LibGUI/Window.h>
#include <LibGfx/Palette.h>
#include <signal.h>
#include <spawn.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
@ -337,16 +338,13 @@ int run_in_windowed_mode(RefPtr<Core::ConfigFile> config, String initial_locatio
});
auto open_terminal_action = GUI::Action::create("Open Terminal here...", Gfx::Bitmap::load_from_file("/res/icons/16x16/app-terminal.png"), [&](const GUI::Action&) {
if (!fork()) {
if (chdir(directory_view.path().characters()) < 0) {
perror("chdir");
exit(1);
}
if (execl("/bin/Terminal", "Terminal", nullptr) < 0)
perror("execl");
exit(1);
}
posix_spawn_file_actions_t spawn_actions;
posix_spawn_file_actions_init(&spawn_actions);
posix_spawn_file_actions_addchdir(&spawn_actions, directory_view.path().characters());
pid_t pid;
const char* argv[] = { "Terminal", nullptr };
posix_spawn(&pid, "/bin/Terminal", &spawn_actions, nullptr, const_cast<char**>(argv), environ);
posix_spawn_file_actions_destroy(&spawn_actions);
});
RefPtr<GUI::Action> view_as_table_action;
@ -719,13 +717,10 @@ int run_in_windowed_mode(RefPtr<Core::ConfigFile> config, String initial_locatio
};
auto open_in_text_editor_action = GUI::Action::create("Open in TextEditor...", Gfx::Bitmap::load_from_file("/res/icons/TextEditor16.png"), [&](auto&) {
pid_t child;
for (auto& path : selected_file_paths()) {
if (!fork()) {
int rc = execl("/bin/TextEditor", "TextEditor", path.characters(), nullptr);
if (rc < 0)
perror("execl");
exit(1);
}
const char* argv[] = { "TextEditor", path.characters(), nullptr };
posix_spawn(&child, "/bin/TextEditor", nullptr, nullptr, const_cast<char**>(argv), environ);
}
});

15
Applications/KeyboardSettings/main.cpp
View file

@ -40,6 +40,7 @@
#include <LibGUI/MessageBox.h>
#include <LibGUI/WindowServerConnection.h>
#include <LibKeyboard/CharacterMap.h>
#include <spawn.h>
int main(int argc, char** argv)
{
@ -123,18 +124,12 @@ int main(int argc, char** argv)
GUI::MessageBox::show("Please select character mapping file.", "Keyboard settings", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window);
return;
}
pid_t child_pid = fork();
if (child_pid < 0) {
perror("fork");
pid_t child_pid;
const char* argv[] = { "/bin/keymap", character_map_file.characters(), nullptr };
if ((errno = posix_spawn(&child_pid, "/bin/keymap", nullptr, nullptr, const_cast<char**>(argv), environ))) {
perror("posix_spawn");
exit(1);
}
if (child_pid == 0) {
if (execl("/bin/keymap", "/bin/keymap", character_map_file.characters(), nullptr) < 0) {
perror("execl");
exit(1);
}
}
if (quit)
app.quit();
};

8
Applications/QuickShow/main.cpp
View file

@ -44,6 +44,7 @@
#include <LibGfx/Bitmap.h>
#include <LibGfx/Palette.h>
#include <LibGfx/Rect.h>
#include <spawn.h>
#include <stdio.h>
#include <string.h>
@ -110,11 +111,10 @@ int main(int argc, char** argv)
widget.load_from_file(url.path());
}
pid_t child;
for (size_t i = 1; i < urls.size(); ++i) {
if (fork() == 0) {
execl("/bin/QuickShow", "/bin/QuickShow", urls[i].path().characters(), nullptr);
ASSERT_NOT_REACHED();
}
const char* argv[] = { "/bin/QuickShow", urls[i].path().characters(), nullptr };
posix_spawn(&child, "/bin/QuickShow", nullptr, nullptr, const_cast<char**>(argv), environ);
}
}
};

8
Applications/Terminal/main.cpp
View file

@ -47,6 +47,7 @@
#include <fcntl.h>
#include <pwd.h>
#include <signal.h>
#include <spawn.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -257,10 +258,9 @@ int main(int argc, char** argv)
auto& app_menu = menubar->add_menu("Terminal");
app_menu.add_action(GUI::Action::create("Open new terminal", { Mod_Ctrl | Mod_Shift, Key_N }, Gfx::Bitmap::load_from_file("/res/icons/16x16/app-terminal.png"), [&](auto&) {
if (!fork()) {
execl("/bin/Terminal", "Terminal", nullptr);
exit(1);
}
pid_t child;
const char* argv[] = { "Terminal", nullptr };
posix_spawn(&child, "/bin/Terminal", nullptr, nullptr, const_cast<char**>(argv), environ);
}));
app_menu.add_action(GUI::Action::create("Settings...", Gfx::Bitmap::load_from_file("/res/icons/gear16.png"),
[&](const GUI::Action&) {