svn commit: r274254 - head/bin/sh

[Jilles Tjoelker]

Author: jilles
Date: Fri Nov  7 21:30:16 2014
New Revision: 274254
URL: https://svnweb.freebsd.org/changeset/base/274254

Log:
  sh(1): Mention portability issue with shifting zero positional parameters.
  
  Per Austin Group issue #459, shifting zero positional parameters may or may
  not be considered an operand error (which causes the shell to exit in most
  cases).

Modified:
  head/bin/sh/sh.1

Modified: head/bin/sh/sh.1
==============================================================================
--- head/bin/sh/sh.1	Fri Nov  7 20:42:15 2014	(r274253)
+++ head/bin/sh/sh.1	Fri Nov  7 21:30:16 2014	(r274254)
@@ -32,7 +32,7 @@
 .\"	from: @(#)sh.1	8.6 (Berkeley) 5/4/95
 .\" $FreeBSD$
 .\"
-.Dd September 21, 2014
+.Dd November 7, 2014
 .Dt SH 1
 .Os
 .Sh NAME
@@ -2522,7 +2522,8 @@ and so on,
 decreasing the value of
 .Li $#
 by one.
-If there are zero positional parameters, shifting does not do anything.
+For portability, shifting if there are zero positional parameters
+should be avoided, since the shell may abort.
 .It Ic test
 A built-in equivalent of
 .Xr test 1 .