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authorGurusamy Sarathy <gsar@cpan.org>2000-03-03 15:42:28 +0000
committerGurusamy Sarathy <gsar@cpan.org>2000-03-03 15:42:28 +0000
commitc93fa8177be816b728baa070d16f5574403845f6 (patch)
tree4808e1f396a09528ccea5aca00bedca957836837 /vms/perlvms.pod
parent8c8ad484ae56ad5a81dc3b76a40859fc90c16a10 (diff)
parent7e6fa307436d3e019e355ee1012a967957762854 (diff)
downloadperl-c93fa8177be816b728baa070d16f5574403845f6.tar.gz
integrate cfgperl and vmsperl contents into mainline
p4raw-id: //depot/perl@5486
Diffstat (limited to 'vms/perlvms.pod')
-rw-r--r--vms/perlvms.pod19
1 files changed, 15 insertions, 4 deletions
diff --git a/vms/perlvms.pod b/vms/perlvms.pod
index 53925b2541..3883233c28 100644
--- a/vms/perlvms.pod
+++ b/vms/perlvms.pod
@@ -463,7 +463,11 @@ is executed as a DCL command. Otherwise, the first token on
the command line is treated as the filespec of an image to
run, and an attempt is made to invoke it (using F<.Exe> and
the process defaults to expand the filespec) and pass the
-rest of C<exec>'s argument to it as parameters.
+rest of C<exec>'s argument to it as parameters. If the token
+has no file type, and matches a file with null type, then an
+attempt is made to determine whether the file is an executable
+image which should be invoked using C<MCR> or a text file which
+should be passed to DCL as a command procedure.
You can use C<exec> in both ways within the same script, as
long as you call C<fork> and C<exec> in pairs. Perl
@@ -558,9 +562,16 @@ specification (e.g. C<:> or C<]>), an attempt is made to expand it
using a default type of F<.Exe> and the process defaults, and if
successful, the resulting file is invoked via C<MCR>. This allows you
to invoke an image directly simply by passing the file specification
-to C<system>, a common Unixish idiom. If LIST consists
-of the empty string, C<system> spawns an interactive DCL subprocess,
-in the same fashion as typiing B<SPAWN> at the DCL prompt.
+to C<system>, a common Unixish idiom. If the token has no file type,
+and matches a file with null type, then an attempt is made to
+determine whether the file is an executable image which should be
+invoked using C<MCR> or a text file which should be passed to DCL
+as a command procedure.
+
+If LIST consists of the empty string, C<system> spawns an
+interactive DCL subprocess, in the same fashion as typiing
+B<SPAWN> at the DCL prompt.
+
Perl waits for the subprocess to complete before continuing
execution in the current process. As described in L<perlfunc>,
the return value of C<system> is a fake "status" which follows