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timeout(1) run a command with a time limit
timeout, timeout_set, timeout_add, timeout_add_msec, timeout_add_nsec, timeout_add_sec, timeout_add_tv, timeout_add_usec, timeout_barrier, timeout_del, timeout_del_barrier, timeout_initialized, TIMEOUT_INITIALIZER, TIMEOUT_INITIALIZER_FLAGS, timeout_pending, timeout_set_flags, timeout_set_proc, timeout_triggered(9) execute a function after a specified period of time
curs_inopts, cbreak, echo, halfdelay, intrflush, keypad, meta, nocbreak, nodelay, noecho, noqiflush, noraw, notimeout, qiflush, raw, timeout, typeahead, wtimeout(3) curses input options
TIMEOUT(1) General Commands Manual TIMEOUT(1)

timeout — run a command with a time limit

timeout [-k time] [-s sig] [--foreground] [--preserve-status] duration command [args]

The timeout utility executes command, with any args, and kills it if it is still running after the specified duration. If duration is 0, the timeout is disabled.

The options are as follows:

time, --kill-after=time
Send a second signal, SIGKILL, if the command is still running time after the first signal was sent.
sig, --signal=sig
Specify the signal to send on timeout, instead of the default SIGTERM.
Do not propagate the timeout signal to children processes.
Always exit with the same status as command, even if the timeout was reached.

duration and time may contain a decimal fraction. The value defaults to seconds unless a unit suffix is given.

The supported unit suffixes are:

s
seconds
m
minutes
h
hours
d
days

If the timeout was not reached or --preserve-status was set, the exit status of command is returned.

If the timeout was reached and --preserve-status was not set, an exit status of 124 is returned.

If command exited after receiving a signal, the exit status returned is the signal number plus 128.

kill(1), signal(3)

The timeout utility first appeared in GNU Coreutils 7.0 and has been available since OpenBSD 7.0.

September 4, 2021 OpenBSD-current