.Dd 2015-10-08
.Dt SHA1SUM 1
.Os sbase
.Sh NAME
.Nm sha1sum
.Nd compute or check SHA-1 message digests
.Sh SYNOPSIS
.Nm
.Op Fl c
.Op Ar file ...
.Sh DESCRIPTION
.Nm
writes SHA-1 (160-bit) checksums of each
.Ar file
to stdout.
If no
.Ar file
is given
.Nm
reads from stdin.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl c
Read list of SHA-1 checksums from each
.Ar file
and check them.
If no
.Ar file
is given
.Nm
reads from stdin.
.El