Messages in this thread Patch in this message | | | From | Claudio Scordino <> | Subject | Re: [PATCH] getrusage sucks | Date | Sat, 12 Nov 2005 00:43:51 +0100 |
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> > In which case the only comment I have is the one about accuracy - and > that is true for procfs too so will only come up if someone gets the > urge to use perfctr timers for precision resource management
According to your comments, this the final patch.
Should it be committed ?
Claudio
diff --git a/kernel/sys.c b/kernel/sys.c --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1746,9 +1746,26 @@ 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; + struct rusage r; + read_lock(&tasklist_lock); + tsk = find_task_by_pid(who); + if (tsk == NULL) { + read_unlock(&tasklist_lock); + return -EINVAL; + } + if ((current->euid != tsk->euid) && + (current->euid != tsk->uid) && + (!capable(CAP_SYS_ADMIN))){ + read_unlock(&tasklist_lock); + return -EPERM; + } + k_getrusage(tsk, RUSAGE_SELF, &r); + read_unlock(&tasklist_lock); + return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; + } else + return getrusage(current, who, ru); }
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