Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / tools / perl-5.8.0 / man / man3 / Shell.3

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.\" ========================================================================
.\"
.IX Title "Shell 3"
.TH Shell 3 "2002-06-01" "perl v5.8.0" "Perl Programmers Reference Guide"
.SH "NAME"
Shell \- run shell commands transparently within perl
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
See below.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.Vb 5
\&  Date: Thu, 22 Sep 94 16:18:16 -0700
\&  Message-Id: <9409222318.AA17072@scalpel.netlabs.com>
\&  To: perl5-porters@isu.edu
\&  From: Larry Wall <lwall@scalpel.netlabs.com>
\&  Subject: a new module I just wrote
.Ve
.PP
Here's one that'll whack your mind a little out.
.PP
.Vb 1
\&    #!/usr/bin/perl
.Ve
.PP
.Vb 1
\&    use Shell;
.Ve
.PP
.Vb 2
\&    $foo = echo("howdy", "<funny>", "world");
\&    print $foo;
.Ve
.PP
.Vb 2
\&    $passwd = cat("</etc/passwd");
\&    print $passwd;
.Ve
.PP
.Vb 2
\&    sub ps;
\&    print ps -ww;
.Ve
.PP
.Vb 1
\&    cp("/etc/passwd", "/tmp/passwd");
.Ve
.PP
That's maybe too gonzo.  It actually exports an \s-1AUTOLOAD\s0 to the current
package (and uncovered a bug in Beta 3, by the way).  Maybe the usual
usage should be
.PP
.Vb 1
\&    use Shell qw(echo cat ps cp);
.Ve
.PP
Larry
.PP
If you set \f(CW$Shell::capture_stderr\fR to 1, the module will attempt to
capture the \s-1STDERR\s0 of the process as well.
.PP
The module now should work on Win32.
.PP
.Vb 1
\& Jenda
.Ve
.PP
There seemed to be a problem where all arguments to a shell command were
quoted before being executed.  As in the following example:
.PP
.Vb 2
\& cat('</etc/passwd');
\& ls('*.pl');
.Ve
.PP
really turned into:
.PP
.Vb 2
\& cat '</etc/passwd'
\& ls '*.pl'
.Ve
.PP
instead of:
.PP
.Vb 2
\&  cat </etc/passwd
\&  ls *.pl
.Ve
.PP
and of course, this is wrong.
.PP
I have fixed this bug, it was brought up by Wolfgang Laun [\s-1ID\s0 20000326.008]
.PP
Casey
.Sh "\s-1OBJECT\s0 \s-1ORIENTED\s0 \s-1SYNTAX\s0"
.IX Subsection "OBJECT ORIENTED SYNTAX"
Shell now has an \s-1OO\s0 interface.  Good for namespace conservation 
and shell representation.
.PP
.Vb 3
\& use Shell;
\& my $sh = Shell->new;
\& print $sh->ls;
.Ve
.PP
Casey
.SH "AUTHOR"
.IX Header "AUTHOR"
Larry Wall
.PP
Changes by Jenda@Krynicky.cz and Dave Cottle <d.cottle@csc.canterbury.ac.nz>
.PP
Changes and bug fixes by Casey West <casey@geeknest.com>