From: Paul Green <Paul.Green@stratus.com>
Date: Fri, 31 May 2002 12:23:00 +0000 (-0400)
Subject: Adjust executable suffix checks for VMS
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=68fb0eb7ecdd3258dde75aba3e98109bd2bcc6c3;p=p5sagit%2Fp5-mst-13.2.git

Adjust executable suffix checks for VMS
Message-Id: <200205311622.MAA21673@mailhub2.stratus.com>

p4raw-id: //depot/perl@16927
---

diff --git a/pod/perlport.pod b/pod/perlport.pod
index 2b4d3d9..a90d4cd 100644
--- a/pod/perlport.pod
+++ b/pod/perlport.pod
@@ -453,30 +453,32 @@ Don't count on specific values of C<$!>.
 Don't assume that the name used to invoke a command or program with
 C<system> or C<exec> can also be used to test for the existence of the
 file that holds the executable code for that command or program.
-First, many operating systems have "internal" commands that are
-built-in to the OS and while these commands can be invoked, there is
-no corresponding file.  Second, some operating systems (Cygwin, DJGPP,
-OS/2, and VOS) have required suffixes for executable files; these
-suffixes are generally permitted on the command name but are not
+First, many systems have "internal" commands that are built-in to the
+shell or OS and while these commands can be invoked, there is no
+corresponding file.  Second, some operating systems (e.g., Cygwin,
+DJGPP, OS/2, and VOS) have required suffixes for executable files;
+these suffixes are generally permitted on the command name but are not
 required.  Thus, a command like "perl" might exist in a file named
 "perl", "perl.exe", or "perl.pm", depending on the operating system.
 The variable "_exe" in the Config module holds the executable suffix,
-if any.  Third, VMS files always end in a version number, which comes
-after the executable suffix.
+if any.  Third, the VMS port carefully sets up $^X and
+$Config{perlpath} so that no further processing is required.  This is
+just as well, because the matching regular expression used below would
+then have to deal with a possible trailing version number in the VMS
+file name.
 
 To convert $^X to a file pathname, taking account of the requirements
 of the various operating system possibilities, say:
   use Config;
-  use File::Spec;
   $thisperl = $^X;
-  $thisperl .= $Config{_exe} unless $thisperl ~= m/$Config{_exe}([;\d]*)$/i;
+  if ($^O ne 'VMS')
+     {$thisperl .= $Config{_exe} unless $thisperl =~ m/$Config{_exe}$/i;}
 
 To convert $Config{perlpath} to a file pathname, say:
-
   use Config;
-  use File::Spec;
-  $thisperl = File::Spec->canonpath($Config{perlpath});
-  $thisperl .= $Config{_exe} unless $thisperl ~= m/$Config{_exe}([;\d]*)$/i;
+  $thisperl = $Config{perlpath};
+  if ($^O ne 'VMS')
+     {$thisperl .= $Config{_exe} unless $thisperl =~ m/$Config{_exe}$/i;}
 
 =head2 Interprocess Communication (IPC)
 
diff --git a/pod/perlvar.pod b/pod/perlvar.pod
index 9f23dcf..ae72617 100644
--- a/pod/perlvar.pod
+++ b/pod/perlvar.pod
@@ -1178,10 +1178,10 @@ following statements:
 
 # Build up a set of file names (not command names).
   use Config;
-  use File::Spec;
-  $this_perl = File::Spec->canonpath($^X);
-  $this_perl .= $Config{_ext}
-          unless $this_perl =~ m/$Config{_ext}([;\d]*)$/i;
+  $this_perl = $^X;
+  if ($^O ne 'VMS')
+     {$this_perl .= $Config{_exe}
+          unless $this_perl =~ m/$Config{_exe}$/i;}
 
 Because many operating systems permit anyone with read access to
 the Perl program file to make a copy of it, patch the copy, and
@@ -1192,10 +1192,10 @@ this goal, and produce a pathname that can be invoked as a
 command or referenced as a file.
 
   use Config;
-  use File::Spec;
-  $secure_perl_path = File::Spec->canonpath($Config{perlpath});
-  $secure_perl_path .= $Config{_ext}
-          unless $secure_perl_path =~ m/$Config{_ext}([;\d]*)$/i;
+  $secure_perl_path = $Config{perlpath};
+  if ($^O ne 'VMS')
+     {$secure_perl_path .= $Config{_exe}
+          unless $secure_perl_path =~ m/$Config{_exe}$/i;}
 
 =item ARGV