#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

int glob = 6;
char buf[] = "a write to standard output\n";

int main( void )
{
        int var = 88; /* local variable on the stack */
        pid_t pid;
        if ( write( STDOUT_FILENO, buf, sizeof (buf) - 1 )
             != sizeof( buf ) - 1 ) {
                fprintf( stderr, "write error" );
                exit( 1 );
        }
        printf( "before fork\n" );
        if ( ( pid = fork() ) < 0 ) {
                fprintf( stderr, "fork error\n" );
                exit( 1 );
        } else if ( pid == 0 ) {  /* child */
                ++glob;
                ++var;
        } else
                sleep( 2 );     /* parent */
        printf( "pid = %d, glob = %d, var = %d\n", getpid(), glob, var );
        exit( 0 );
}