if (!valid_signal(sig))
return error;
error = -EPERM;
- 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)))
&& ((sig != SIGCONT) ||
(current->signal->session != t->signal->session))
&& (current->euid ^ t->suid) && (current->euid ^ t->uid)
* fast-pathed signals for kernel-internal things like SIGSTOP
* or SIGKILL.
*/
- if ((unsigned long)info == 2)
+ if (info == SEND_SIG_FORCED)
goto out_set;
/* Real-time signals must be queued if sent by sigqueue, or
pass on the info struct. */
q = __sigqueue_alloc(t, GFP_ATOMIC, (sig < SIGRTMIN &&
- ((unsigned long) info < 2 ||
+ (is_si_special(info) ||
info->si_code >= 0)));
if (q) {
list_add_tail(&q->list, &signals->list);
switch ((unsigned long) info) {
- case 0:
+ case (unsigned long) SEND_SIG_NOINFO:
q->info.si_signo = sig;
q->info.si_errno = 0;
q->info.si_code = SI_USER;
q->info.si_pid = current->pid;
q->info.si_uid = current->uid;
break;
- case 1:
+ case (unsigned long) SEND_SIG_PRIV:
q->info.si_signo = sig;
q->info.si_errno = 0;
q->info.si_code = SI_KERNEL;
copy_siginfo(&q->info, info);
break;
}
- } else {
- if (sig >= SIGRTMIN && info && (unsigned long)info != 1
- && info->si_code != SI_USER)
+ } else if (!is_si_special(info)) {
+ if (sig >= SIGRTMIN && info->si_code != SI_USER)
/*
* Queue overflow, abort. We may abort if the signal was rt
* and sent by user using something other than kill().
*/
return -EAGAIN;
- if (((unsigned long)info > 1) && (info->si_code == SI_TIMER))
- /*
- * Set up a return to indicate that we dropped
- * the signal.
- */
- ret = info->si_sys_private;
}
out_set:
BUG();
assert_spin_locked(&t->sighand->siglock);
- if (((unsigned long)info > 2) && (info->si_code == SI_TIMER))
- /*
- * Set up a return to indicate that we dropped the signal.
- */
- ret = info->si_sys_private;
-
/* Short-circuit ignored signals. */
if (sig_ignored(t, sig))
goto out;
int ret;
spin_lock_irqsave(&t->sighand->siglock, flags);
- if (sigismember(&t->blocked, sig) || t->sighand->action[sig-1].sa.sa_handler == SIG_IGN) {
+ if (t->sighand->action[sig-1].sa.sa_handler == SIG_IGN) {
t->sighand->action[sig-1].sa.sa_handler = SIG_DFL;
+ }
+ if (sigismember(&t->blocked, sig)) {
sigdelset(&t->blocked, sig);
- recalc_sigpending_tsk(t);
}
+ recalc_sigpending_tsk(t);
ret = specific_send_sig_info(sig, info, t);
spin_unlock_irqrestore(&t->sighand->siglock, flags);
void
force_sig_specific(int sig, struct task_struct *t)
{
- unsigned long int flags;
-
- spin_lock_irqsave(&t->sighand->siglock, flags);
- if (t->sighand->action[sig-1].sa.sa_handler == SIG_IGN)
- t->sighand->action[sig-1].sa.sa_handler = SIG_DFL;
- sigdelset(&t->blocked, sig);
- recalc_sigpending_tsk(t);
- specific_send_sig_info(sig, (void *)2, t);
- spin_unlock_irqrestore(&t->sighand->siglock, flags);
+ force_sig_info(sig, SEND_SIG_FORCED, t);
}
/*
assert_spin_locked(&p->sighand->siglock);
handle_stop_signal(sig, p);
- if (((unsigned long)info > 2) && (info->si_code == SI_TIMER))
- /*
- * Set up a return to indicate that we dropped the signal.
- */
- ret = info->si_sys_private;
-
/* Short-circuit ignored signals. */
if (sig_ignored(p, sig))
return ret;
return ret;
}
+#define __si_special(priv) \
+ ((priv) ? SEND_SIG_PRIV : SEND_SIG_NOINFO)
+
int
send_sig(int sig, struct task_struct *p, int priv)
{
- return send_sig_info(sig, (void*)(long)(priv != 0), p);
+ return send_sig_info(sig, __si_special(priv), p);
}
/*
void
force_sig(int sig, struct task_struct *p)
{
- force_sig_info(sig, (void*)1L, p);
+ force_sig_info(sig, SEND_SIG_PRIV, p);
}
/*
int
kill_pg(pid_t pgrp, int sig, int priv)
{
- return kill_pg_info(sig, (void *)(long)(priv != 0), pgrp);
+ return kill_pg_info(sig, __si_special(priv), pgrp);
}
int
kill_proc(pid_t pid, int sig, int priv)
{
- return kill_proc_info(sig, (void *)(long)(priv != 0), pid);
+ return kill_proc_info(sig, __si_special(priv), pid);
}
/*