sys_rt_sigtimedwait(9)

💅 sys_rt_sigtimedwait(9) — like, the kernel API manual bestie ✨

Okay so picture this: you're in the Kernel API Manual, and today's main character is sys_rt_sigtimedwait. Buckle up 🎀

---

🌸 NAME 🌸

sys_rt_sigtimedwait — ok so this one synchronously waits for queued signals that you specified in @uthese. Synchronously!! Like it's just gonna stand there and wait for them, no cap 💅

---

✨ SYNOPSIS ✨

long sys_rt_sigtimedwait (const sigset_t __user * uthese , siginfo_t
__user * uinfo , const struct __kernel_timespec __user * uts , size_t
sigsetsize );

Literally the whole signature, character for character, because we do not mess with the source 🫶

---

💖 ARGUMENTS 💖

• uthese — the queued signals you're waiting for 👀 like, the lineup. the guest list.
• uinfo — if this is non-null, the signal's siginfo gets returned right here 💌 so you actually find out what happened.
• uts — the upper bound on how long the process can be suspended 😴 your lil time limit for the nap.
• sigsetsize — the size of the sigset_t type 📏 just, the size. that's it.

---

🦋 SEE ALSO 🦋

Kernel file ./kernel/signal.c — and honestly the whole signal.c friend group came through 😭💕

• task_set_jobctl_pending(9)
• task_clear_jobctl_trapping(9)
• task_clear_jobctl_pending(9)
• task_participate_group_stop(9)
• ptrace_trap_notify(9)
• force_sig_seccomp(9)
• do_notify_parent_cldstop(9)
• do_signal_stop(9)
• do_jobctl_trap(9)
• do_freezer_trap(9)
• signal_delivered(9)
• sys_restart_syscall(9)
• set_current_blocked(9)
• sys_rt_sigprocmask(9)
• sys_rt_sigpending(9)
• copy_siginfo_to_external32(9)
• do_sigtimedwait(9)
• sys_kill(9)
• sys_pidfd_send_signal(9)
• sys_tgkill(9)
• sys_tkill(9)
• sys_rt_sigqueueinfo(9)
• sys_sigpending(9)
• sys_sigprocmask(9)
• sys_rt_sigaction(9)
• sys_rt_sigsuspend(9)

---

ngl if you're poking at signals from inside ./kernel, this list is your group chat. read it. iykyk 💀

---

And that's the whole page, bestie — sign-off time 🌈 This one lives in ./kernel, it's dated October 2026, and the title up top is sys_rt_sigtimedwait(9) because of course it is 👑 Slay, stay blocked-until-ready, and don't wait synchronously for anything that isn't worth it 💜🦋✨