package Shell;
+use vars qw($capture_stderr $VERSION);
-use Config;
+$VERSION = '0.2';
sub import {
my $self = shift;
AUTOLOAD {
my $cmd = $AUTOLOAD;
$cmd =~ s/^.*:://;
- eval qq {
+ eval <<"*END*";
sub $AUTOLOAD {
if (\@_ < 1) {
- `$cmd`;
+ \$Shell::capture_stderr ? `$cmd 2>&1` : `$cmd`;
}
- elsif (\$Config{'archname'} eq 'os2') {
+ elsif ('$^O' eq 'os2') {
local(\*SAVEOUT, \*READ, \*WRITE);
open SAVEOUT, '>&STDOUT' or die;
open STDOUT, '>&WRITE' or die;
close WRITE;
- my \$pid = system(1, \$cmd, \@_);
- die "Can't execute $cmd: \$!\n" if \$pid < 0;
+ my \$pid = system(1, '$cmd', \@_);
+ die "Can't execute $cmd: \$!\\n" if \$pid < 0;
open STDOUT, '>&SAVEOUT' or die;
close SAVEOUT;
}
}
else {
- open(SUBPROC, "-|")
- or exec '$cmd', \@_
- or die "Can't exec $cmd: \$!\n";
+ my \$a;
+ my \@arr = \@_;
+ if ('$^O' eq 'MSWin32') {
+ # XXX this special-casing should not be needed
+ # if we do quoting right on Windows. :-(
+ #
+ # First, escape all quotes. Cover the case where we
+ # want to pass along a quote preceded by a backslash
+ # (i.e., C<"param \\""" end">).
+ # Ugly, yup? You know, windoze.
+ # Enclose in quotes only the parameters that need it:
+ # try this: c:\> dir "/w"
+ # and this: c:\> dir /w
+ for (\@arr) {
+ s/"/\\\\"/g;
+ s/\\\\\\\\"/\\\\\\\\"""/g;
+ \$_ = qq["\$_"] if /\s/;
+ }
+ }
+ else {
+ for (\@arr) {
+ s/(['\\\\])/\\\\\$1/g;
+ \$_ = "'\$_'";
+ }
+ }
+ push \@arr, '2>&1' if \$Shell::capture_stderr;
+ open(SUBPROC, join(' ', '$cmd', \@arr, '|'))
+ or die "Can't exec $cmd: \$!\\n";
if (wantarray) {
my \@ret = <SUBPROC>;
close SUBPROC; # XXX Oughta use a destructor.
}
}
}
- };
+*END*
+
+ die "$@\n" if $@;
goto &$AUTOLOAD;
}
1;
+__END__
+
+=head1 NAME
+
+Shell - run shell commands transparently within perl
+
+=head1 SYNOPSIS
+
+See below.
+
+=head1 DESCRIPTION
+
+ 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
+
+Here's one that'll whack your mind a little out.
+
+ #!/usr/bin/perl
+
+ use Shell;
+
+ $foo = echo("howdy", "<funny>", "world");
+ print $foo;
+
+ $passwd = cat("</etc/passwd");
+ print $passwd;
+
+ sub ps;
+ print ps -ww;
+
+ cp("/etc/passwd", "/tmp/passwd");
+
+That's maybe too gonzo. It actually exports an AUTOLOAD to the current
+package (and uncovered a bug in Beta 3, by the way). Maybe the usual
+usage should be
+
+ use Shell qw(echo cat ps cp);
+
+Larry
+
+
+If you set $Shell::capture_stderr to 1, the module will attempt to
+capture the STDERR of the process as well.
+
+The module now should work on Win32.
+
+ Jenda
+
+=head1 AUTHOR
+
+Larry Wall
+
+Changes by Jenda@Krynicky.cz and Dave Cottle <d.cottle@csc.canterbury.ac.nz>
+
+=cut