V4/man/man1/cp.1

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.th CP I 1/24/73
.sh  NAME
cp \*- copy
.sh SYNOPSIS
.bd cp
file1 file2
.sh DESCRIPTION
The
first file is copied onto the second.
The mode and owner of the target file
are preserved if it already
existed; the mode of the source file
is used otherwise.
.s3
If
.it file2
is a directory, then the target 
file is a file in that directory with the file-name
of
.it file1.
.sh "SEE ALSO"
cat(I), pr(I), mv(I)
.sh BUGS
Copying
a file onto itself destroys its contents.