Author: jilles Date: Fri Sep 10 14:00:27 2010 New Revision: 212418 URL: http://svn.freebsd.org/changeset/base/212418
Log: test(1): Clarify grammar ambiguity and -a/-o vs shell &&/||. Modified: head/bin/test/test.1 Modified: head/bin/test/test.1 ============================================================================== --- head/bin/test/test.1 Fri Sep 10 13:40:31 2010 (r212417) +++ head/bin/test/test.1 Fri Sep 10 14:00:27 2010 (r212418) @@ -32,7 +32,7 @@ .\" @(#)test.1 8.1 (Berkeley) 5/31/93 .\" $FreeBSD$ .\" -.Dd July 31, 2006 +.Dd September 10, 2010 .Dt TEST 1 .Os .Sh NAME @@ -310,6 +310,14 @@ are evaluated consistently according to standards document. All other cases are subject to the ambiguity in the command semantics. +.Pp +In particular, only expressions containing +.Fl a , +.Fl o , +.Cm \&( +or +.Cm \&) +can be ambiguous. .Sh EXIT STATUS The .Nm @@ -338,12 +346,11 @@ specification. Both sides are always evaluated in .Fl a and -.Fl o , -unlike in the logical operators of -.Xr sh 1 . +.Fl o . For instance, the writable status of .Pa file will be tested by the following command even though the former expression indicated false, which results in a gratuitous access to the file system: -.Pp .Dl "[ -z abc -a -w file ]" +To avoid this, write +.Dl "[ -z abc ] && [ -w file ]" _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
