Lunatik

• Index

Contents

• Functions
• signal

Modules

• byteorder
• completion
• cpu
• crypto.aead
• crypto.comp
• crypto.rng
• crypto.shash
• crypto.skcipher
• data
• device
• fib
• fifo
• hid
• linux
• lunatik
• lunatik.runner
• mailbox
• net
• netfilter
• notifier
• probe
• rcu
• signal
• socket
• socket.inet
• socket.raw
• socket.unix
• syscall
• syscall.table
• thread
• xdp
• xtable

Topics

• README

Module signal

POSIX Signals

Functions

kill (pid[, sig])

Kills a process by sending a signal.

signal

sigmask (sig[, cmd])	Modifies signal mask for current task.
sigpending ()	Checks current task pending signals.
sigstate (sig[, state])	Checks signal state for current task.

Functions

kill (pid[, sig])

Kills a process by sending a signal. By default, sends SIGKILL. An optional second argument can specify a different signal (either by number or by using the constants from signal.flags).

Parameters:

• pid integer Process ID to kill.
• sig integer Signal number to send (default: signal.flags.KILL). (optional)

Returns:

boolean true if the signal was sent successfully.

Raises:

Error string (e.g., "ESRCH", "EPERM") if the operation fails.

Usage:

signal.kill(1234)  -- Kill process 1234 with SIGKILL (default)
signal.kill(1234, signal.flags.TERM)  -- Kill process 1234 with SIGTERM

signal

sigmask (sig[, cmd])

Modifies signal mask for current task.

Parameters:

• sig integer Signal number
• cmd integer 0=BLOCK (default), 1=UNBLOCK (optional)

Raises:

error string on failure (EINVAL, EPERM, etc.)

Usage:

pcall(signal.sigmask, 15) -- Block SIGTERM
pcall(signal.sigmask, 15, 1) -- Unblock SIGTERM

sigpending ()

Checks current task pending signals.

Returns:

boolean

Usage:

signal.sigpending()

sigstate (sig[, state])

Checks signal state for current task.

Parameters:

• sig integer Signal number
• state string One of: "blocked", "pending", "allowed" (optional)

Returns:

boolean

Usage:

signal.sigstate(15) -- check if SIGTERM is blocked (default)
signal.sigstate(signal.flags.TERM, "pending")