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Add -f option to follow all symlinks recursively in a pathname

.\"	$OpenBSD: readlink.1,v 1.3 1997/09/23 20:13:21 niklas Exp $
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.Dd August 18, 1997
.Dt READLINK 1
.Os
.Sh NAME
.Nm readlink
.Nd display target of symbolic link on standard output
.Sh SYNOPSIS
.Nm readlink
.Op Fl fn
.Ar file
.Sh DESCRIPTION
The
.Nm readlink
utility when invoked with the pathname of a symbolic link as its
argument dereferences the symbolic link and prints the name of target
on standard output.  If readlink is invoked with an argument other
than the pathname of a symbolic link it exits with a non-zero exit
code and without printing anything.
.Pp
The following option is available:
.Bl -tag -width flag
.It Fl f
Canonicalize by following every symlink in every component of the given
path recursively.
.It Fl n
Do not print a trailing newline character.
.El
.Pp
The
.Nm readlink
utility exits 0 on success, and >0 if an error occurs.
.Sh SEE ALSO
.Xr readlink 2
.Sh HISTORY
The
.Nm readlink
utility first appeared in
.Ox 2.1