true.1

unix v7是最后一个广泛发布的研究型UNIX版本

.TH TRUE 1 
.SH NAME
true, false \- provide truth values
.SH SYNOPSIS
.B true
.PP
.B false
.SH DESCRIPTION
.I True
does nothing, successfully.
.I False
does nothing, unsuccessfully.
They are typically used in input to
.IR  sh (1)
such as:
.PP
	while true
.br
	do
.br
		command
.br
	done
.SH "SEE ALSO"
sh(1)
.SH DIAGNOSTICS
.I True
has exit status zero,
.I false
nonzero.