doc: mention realpath in the readlink info

* doc/coreutils.texi (readlink invocation): Add realpath to the index,
and also mention it in the readlink description so people
searching for that functionality can easily make the connection.

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index 4599a27..334d932 100644 (file)
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -9134,6 +9134,8 @@ Set the default SELinux security context to be used for created files.
 @cindex displaying value of a symbolic link
 @cindex canonical file name
 @cindex canonicalize a file name
+@pindex realpath
+@findex realpath
 
 @command{readlink} may work in one of two supported modes:
 
@@ -9213,6 +9215,9 @@ Report error messages.
 
 The @command{readlink} utility first appeared in OpenBSD 2.1.
 
+There is a @command{realpath} command on some systems
+which operates like @command{readlink} in canonicalize mode.
+
 @exitstatus