Fork test

gistfile1.c

#include <stdio.h>
#include <stdlib.h>

int main( int argc, char** argv );

int main( int argc, char** argv )
{
	int pid;

	printf( "Start main function.(%d)\n", __LINE__ );

	pid = fork();
	printf( "Forked process id is %d.(%d)\n", pid, __LINE__ );
	switch( pid ) {
	case 0:
		printf( "I am child process.(%d)\n", __LINE__ );
		exit( 0 );
		break;
	case -1:
		printf( "Fork is failed.(%d)\n", __LINE__ );
		exit( 0 );
		break;
	default:
		printf( "I am parent process.(%d)\n", __LINE__ );
		wait( NULL );
		break;
	}

	printf( "End main function.(%d)\n", __LINE__ );

	return 0;
}