#include <linux/posix-timers.h>
#include <linux/signal.h>
#include <linux/audit.h>
+#include <linux/capability.h>
#include <asm/param.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
return(q);
}
-static inline void __sigqueue_free(struct sigqueue *q)
+static void __sigqueue_free(struct sigqueue *q)
{
if (q->flags & SIGQUEUE_PREALLOC)
return;
posix_cpu_timers_exit(tsk);
if (atomic_dec_and_test(&sig->count)) {
posix_cpu_timers_exit_group(tsk);
- if (tsk == sig->curr_target)
- sig->curr_target = next_thread(tsk);
tsk->signal = NULL;
__exit_sighand(tsk);
spin_unlock(&sighand->siglock);
spin_unlock_irqrestore(¤t->sighand->siglock, flags);
}
-static inline int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
+static int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
{
struct sigqueue *q, *first = NULL;
int still_pending = 0;
kick_process(t);
}
+/*
+ * Remove signals in mask from the pending set and queue.
+ * Returns 1 if any signals were found.
+ *
+ * All callers must be holding the siglock.
+ *
+ * This version takes a sigset mask and looks at all signals,
+ * not just those in the first mask word.
+ */
+static int rm_from_queue_full(sigset_t *mask, struct sigpending *s)
+{
+ struct sigqueue *q, *n;
+ sigset_t m;
+
+ sigandsets(&m, mask, &s->signal);
+ if (sigisemptyset(&m))
+ return 0;
+
+ signandsets(&s->signal, &s->signal, mask);
+ list_for_each_entry_safe(q, n, &s->list, list) {
+ if (sigismember(mask, q->info.si_signo)) {
+ list_del_init(&q->list);
+ __sigqueue_free(q);
+ }
+ }
+ return 1;
+}
/*
* Remove signals in mask from the pending set and queue.
* Returns 1 if any signals were found.
ret = -ESRCH;
goto out_unlock;
}
- if ((!info || ((unsigned long)info != 1 &&
- (unsigned long)info != 2 && SI_FROMUSER(info)))
+ if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
&& (euid != p->suid) && (euid != p->uid)
&& (uid != p->suid) && (uid != p->uid)) {
ret = -EPERM;
* We return zero if we still hold the siglock and should look
* for another signal without checking group_stop_count again.
*/
-static inline int handle_group_stop(void)
+static int handle_group_stop(void)
{
int stop_count;
}
int
-do_sigaction(int sig, const struct k_sigaction *act, struct k_sigaction *oact)
+do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact)
{
struct k_sigaction *k;
+ sigset_t mask;
if (!valid_signal(sig) || sig < 1 || (act && sig_kernel_only(sig)))
return -EINVAL;
*oact = *k;
if (act) {
+ sigdelsetmask(&act->sa.sa_mask,
+ sigmask(SIGKILL) | sigmask(SIGSTOP));
/*
* POSIX 3.3.1.3:
* "Setting a signal action to SIG_IGN for a signal that is
read_lock(&tasklist_lock);
spin_lock_irq(&t->sighand->siglock);
*k = *act;
- sigdelsetmask(&k->sa.sa_mask,
- sigmask(SIGKILL) | sigmask(SIGSTOP));
- rm_from_queue(sigmask(sig), &t->signal->shared_pending);
+ sigemptyset(&mask);
+ sigaddset(&mask, sig);
+ rm_from_queue_full(&mask, &t->signal->shared_pending);
do {
- rm_from_queue(sigmask(sig), &t->pending);
+ rm_from_queue_full(&mask, &t->pending);
recalc_sigpending_tsk(t);
t = next_thread(t);
} while (t != current);
}
*k = *act;
- sigdelsetmask(&k->sa.sa_mask,
- sigmask(SIGKILL) | sigmask(SIGSTOP));
}
spin_unlock_irq(¤t->sighand->siglock);
new_sa.sa.sa_handler = handler;
new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
+ sigemptyset(&new_sa.sa.sa_mask);
ret = do_sigaction(sig, &new_sa, &old_sa);
#endif
+#ifdef __ARCH_WANT_SYS_RT_SIGSUSPEND
+asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize)
+{
+ sigset_t newset;
+
+ /* XXX: Don't preclude handling different sized sigset_t's. */
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (copy_from_user(&newset, unewset, sizeof(newset)))
+ return -EFAULT;
+ sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
+
+ spin_lock_irq(¤t->sighand->siglock);
+ current->saved_sigmask = current->blocked;
+ current->blocked = newset;
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_thread_flag(TIF_RESTORE_SIGMASK);
+ return -ERESTARTNOHAND;
+}
+#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */
+
void __init signals_init(void)
{
sigqueue_cachep =