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Assignment
General Control Flow/fork()
int main(int argc,char** argv){
.....
for(i = 0;i < 4;i++){
int ret_pid = fork();
if ( ret_pid < 0 ) exit(1); //this means fork() failed
else if ( ret_pid == 0 ) ! //this is the child
else ... //this is the parent (Controller)
}
return 0;
execlp()
Same thing applies when using exec, you just have to be explicit about it.
More execlp() and parameters
This is because the argument list must be null-terminated, just like any other string.
Makefiles
Makefile example
[target] : [dependency1] ! [dependencyn] [command to execute]
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problems of procedure
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