diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2009-04-04 21:01:06 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2009-04-30 17:24:24 (GMT) |
commit | 62ab4505e3efaf67784f84059e0fb9cedb1728ea (patch) | |
tree | 54da8395eaf30a0386cd71214fbabe94ded229e2 /kernel/signal.c | |
parent | 30b4ae8a4498543863501f707879b7220b649602 (diff) | |
download | linux-fsl-qoriq-62ab4505e3efaf67784f84059e0fb9cedb1728ea.tar.xz |
signals: implement sys_rt_tgsigqueueinfo
sys_kill has the per thread counterpart sys_tgkill. sigqueueinfo is
missing a thread directed counterpart. Such an interface is important
for migrating applications from other OSes which have the per thread
delivery implemented.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Acked-by: Ulrich Drepper <drepper@redhat.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r-- | kernel/signal.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 56d27ac..f79b3b9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2369,6 +2369,32 @@ SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, return kill_proc_info(sig, &info, pid); } +long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) +{ + /* This is only valid for single tasks */ + if (pid <= 0 || tgid <= 0) + return -EINVAL; + + /* Not even root can pretend to send signals from the kernel. + Nor can they impersonate a kill(), which adds source info. */ + if (info->si_code >= 0) + return -EPERM; + info->si_signo = sig; + + return do_send_specific(tgid, pid, sig, info); +} + +SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, + siginfo_t __user *, uinfo) +{ + siginfo_t info; + + if (copy_from_user(&info, uinfo, sizeof(siginfo_t))) + return -EFAULT; + + return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); +} + int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) { struct task_struct *t = current; |