int main(int ac, char *av[])
{
int pid, todc[2], fromdc[2]; /* equipment */
/*
* special case for -c option
*/
if ( ac > 1 && strcmp(av[1], "-c") == 0 ){
compile_only();
return 0;
}
/* make two pipes */
if ( pipe(todc) == -1 || pipe(fromdc) == -1 )
oops("pipe failed", 1);
/* get a process for user interface */
if ( (pid = fork()) == -1 )
oops("cannot fork", 2);
if ( pid == 0 ) /* child is dc */
be_dc(todc, fromdc);
else {
be_bc(todc, fromdc); /* parent is ui */
wait(NULL); /* wait for child */
}
return 0;
}
int main(void) {
int todc[2], fromdc[2];
pipe(todc);
pipe(fromdc);
if (fork() == 0) {
be_dc(todc, fromdc);
}
else {
be_bc(todc, fromdc);
wait(NULL);
}
return EXIT_SUCCESS;
}
int main(){
int pid,todc[2],fromdc[2];
//make 2 pipes
if(pipe(todc)==-1||pipe(fromdc)==-1){
oops("pipe failed",1);
}
if((pid=fork())==-1){
oops("fork failed",1);
}
if(pid==0){
be_dc(todc,fromdc);
}else{
be_bc(todc,fromdc);
wait(NULL);
}
}
int main( void )
{
int pid, todc[2], fromdc[2];
if( pipe( todc ) == -1 || pipe( fromdc ) == -1 ) {
oops( "pipe failed", 1 );
}
if( ( pid = fork() ) == -1 ) {
oops( "cannot fork", 2 );
}
if( pid == 0 ) {
be_dc( todc, fromdc );
} else {
be_bc( todc, fromdc );
wait( NULL );
}
return 0;
}
int main(int argc, char *argv[])
{
int pid, todc[2], fromdc[2];
/* make tow pipes */
if (pipe(todc) == -1 || pipe(fromdc) == -1)
opps("pipe failed", 1);
/* get a process for user interface */
if ((pid = fork()) == -1)
opps("Cannot fork", 2);
if (pid == 0) /* child dc */
be_dc(todc, fromdc);
else{
be_bc(todc, fromdc);
wait(NULL);
}
return 0;
}
