Core::System::waitpid serenityos c++ system call - c++ first see.

c++ example

#include <LibCore/System.h>

int main(int argc, char * argv[])
{
	bool enable_wait = false;
	if (argc == 2 && "true"sv == argv[1])
		enable_wait = true;
	auto id = Core::System::fork();

	if (id.value() == 0)
	{
		for (int i=0; i<5; ++i)
			AK::outln("[child] I am child");
	}

	if (id.value() > 0)
	{
		if (enable_wait)
		{
			auto result = Core::System::waitpid(id.value(), 0);
			AK::outln("[parent] wait has error: {}", result.is_error());
			AK::outln("[parent] wait child: {}, wait result: {}", result.value().pid, result.value().status);
		}
		AK::outln("[parent] I am parent, my child is {}", id);
		for (int i=0; i<5; ++i)
		{
			AK::outln("[parent] I am parent");
		}
	}
}

output (not enable):

courage:~ $ ./hello
[parent] I am parent, my child is {3579}
[parent] I am parent
[parent] I am parent
[parent] I am parent
[parent] I am parent
[parent] I am parent
[child] I am child
[child] I am child
[child] I am child
[child] I am child
[child] I am child

output (enable):

courage:~ $ ./hello true
[child] I am child
[child] I am child
[child] I am child
[child] I am child
[child] I am child
[parent] wait has error: false
[parent] wait child: 3643, wait result: 0
[parent] I am parent, my child is {3643}
[parent] I am parent
[parent] I am parent
[parent] I am parent
[parent] I am parent
[parent] I am parent

Jan 20, 2025

Back

Up

cpp/c++

c++ std::exception:

std::cout.write(err.data(), err.size());

std::cout << std::endl;

caught:

  ===================================
  #  The c++ programming language.  #
  #                                 #
  #  Join c++ Discord: yZcauUAUyC   #
  #  Deck                           #
  ===================================

Home: cppfx.xyz