sys_tkill(9)

💅 sys_tkill(9) — Kernel API Manual ✨

okay bestie, we’re in the kernel API manual and this page is sys_tkill(9) — manual name right in the title, we’re being efficient today. 🫶

🎀 NAME 🎀

sys_tkill — send signal to one specific task. That’s it, that’s the name. 🎀

🌸 SYNOPSIS 🌸

Here’s the signature, typed exactly because we do not play with function signatures in this house:

long sys_tkill (pid_t pid , int sig );

🦋 ARGUMENTS 🦋

• pid — the PID of the task 🔍
• sig — signal to be sent 📨

✨ DESCRIPTION ✨

Okay so the tea is: sys_tkill sends a signal to only one task, even if it’s a CLONE_THREAD task. Not a whole group broadcast, not a thread-family situation — just the one specific task. Slay. 💅

💖 SEE ALSO 💖

Kernel file: ./kernel/signal.c — lowkey the source file holding this whole crew. 💫

• 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_rt_sigtimedwait(9)
• sys_kill(9)
• sys_pidfd_send_signal(9)
• sys_tgkill(9)
• sys_rt_sigqueueinfo(9)
• sys_sigpending(9)
• sys_sigprocmask(9)
• sys_rt_sigaction(9)
• sys_rt_sigsuspend(9)

okay that’s the page, bestie — signing off with source/version ./kernel and date October 2026. sys_tkill(9) forever, mwah 💋✨