Does exist any _real_ reason why getrusage can't be invoked by a task to know
statistics of another task ?
The changes would be very trivial, as shown by the following patch.
Claudio
diff --git a/kernel/sys.c b/kernel/sys.c
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1746,9 +1746,13 @@ int getrusage(struct task_struct *p, int
asmlinkage long sys_getrusage(int who, struct rusage __user *ru)
{
- if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
- return -EINVAL;
- return getrusage(current, who, ru);
+ if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) {
+ struct task_struct* tsk = find_task_by_pid(who);
+ if (tsk == NULL)
+ return -EINVAL;
+ return getrusage(tsk, RUSAGE_SELF, ru);
+ } else
+ return getrusage(current, who, ru);
}
asmlinkage long sys_umask(int mask)
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
