So I have asked a couple of questions already about this shell programming, but I have another yet again.
I'm not sure why my times function in this program isn't reporting the time right. It always says that I have 0 seconds of time for a process or some giant number. I cannot get CLK_TCK to be recognized even though I included time.h and limits.h just in case. What am I doing wrong. Also I need to be getting the time of the parent process - time of the child process but am not sure it's actually the time I'm getting. If someone could help me figure this out I would much appreciate it, cause I recieve little to no direction from my teachers and TAs
Here is the code so far:
void runProc(char* cmd[], int argSz)
{
struct tms strt, end;
pid_t pid;
clock_t start, finish;
// fork
start = times(&strt);
pid = fork();
switch(pid)
{
case -1:
cout << "Fork Failed" << endl;
exit(-1);
case 0:
execvp(cmd[0], cmd);
//iff execvp returns a value then that means it was not a proper process
cout << cmd[0] << ": Command Not Found" << endl;
exit(0);
default:
wait(NULL);
finish = times(&end);
//cout << "Process took: " <<(double) (end.tms_stime-strt.tms_stime)/CLK_TCK;
//cout << " seconds" << endl;
//cout << "Child has finished" << endl;
}
cout << "Process took: " << (finish-start);
//cout << (end.tms_stime-strt.tms_stime)/CLK_TCK; //above line generates error saying must use function first
cout << (end.tms_utime-strt.tms_utime);
cout << " seconds" << endl;
}
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Junior Poster in Training
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since Jan 2005
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