waiting for a child process to finish execution in C

cynthia_thomas · 05-26-2006, 02:49 AM

hi,
I have forked a child process from my main process. I want my main pgm to wait till the child finishes execution. I thought of using wait_pid() function in wait.h. But an error is comming

undefined reference to `wait_pid'.

If i am using this wait_pid(), where should i write this, before fork() or after fork()?

I want to know how to use this wait_pid() function. If there is any other way to wait for the completion of the child process please tell me that also

thanks and regards
cynthia

Randux · 05-26-2006, 03:44 AM

man waitpid

debulu · 05-26-2006, 03:58 AM

int status;
int pid=fork();
if(pid<0)
{
/*error code*/
}
else if(pid==0)
{
/*do child work here*/
}
else{
waitpid(pid,&status,0);
/* parent work */
}