sleep.1

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th SLEEP I 11/1/73
.sh NAME
sleep \*- suspend execution for an interval
.sh SYNOPSIS
.bd sleep
time
.sh DESCRIPTION
.it Sleep
suspends execution for
.it time
seconds.
It is used to execute a command
in a certain amount of time as in:
.s3
	(sleep 105; command)&
.s3
Or to execute a command every so often as in
this shell command file:
.s3
	: loop
.br
	command
.br
	sleep 37
.br
	goto loop
.sh "SEE ALSO"
sleep (II)
.sh BUGS
.it Time
must be less than 65536 seconds.