+++ /dev/null
-package Shell;
-use 5.006_001;
-use strict;
-use warnings;
-use File::Spec::Functions;
-
-our($capture_stderr, $raw, $VERSION, $AUTOLOAD);
-
-$VERSION = '0.72_01';
-$VERSION = eval $VERSION;
-
-sub new { bless \my $foo, shift }
-sub DESTROY { }
-
-sub import {
- my $self = shift;
- my ($callpack, $callfile, $callline) = caller;
- my @EXPORT;
- if (@_) {
- @EXPORT = @_;
- } else {
- @EXPORT = 'AUTOLOAD';
- }
- foreach my $sym (@EXPORT) {
- no strict 'refs';
- *{"${callpack}::$sym"} = \&{"Shell::$sym"};
- }
-}
-
-# NOTE: this is used to enable constant folding in
-# expressions like (OS eq 'MSWin32') and
-# (OS eq 'os2') just like it happened in 0.6 version
-# which used eval "string" to install subs on the fly.
-use constant OS => $^O;
-
-=begin private
-
-=item B<_make_cmd>
-
- $sub = _make_cmd($cmd);
- $sub = $shell->_make_cmd($cmd);
-
-Creates a closure which invokes the system command C<$cmd>.
-
-=end private
-
-=cut
-
-sub _make_cmd {
- shift if ref $_[0] && $_[0]->isa( 'Shell' );
- my $cmd = shift;
- my $null = File::Spec::Functions::devnull();
- $Shell::capture_stderr ||= 0;
- # closing over $^O, $cmd, and $null
- return sub {
- shift if ref $_[0] && $_[0]->isa( 'Shell' );
- if (@_ < 1) {
- $Shell::capture_stderr == 1 ? `$cmd 2>&1` :
- $Shell::capture_stderr == -1 ? `$cmd 2>$null` :
- `$cmd`;
- } elsif (OS eq 'os2') {
- local(*SAVEOUT, *READ, *WRITE);
-
- open SAVEOUT, '>&STDOUT' or die;
- pipe READ, WRITE or die;
- open STDOUT, '>&WRITE' or die;
- close WRITE;
-
- my $pid = system(1, $cmd, @_);
- die "Can't execute $cmd: $!\n" if $pid < 0;
-
- open STDOUT, '>&SAVEOUT' or die;
- close SAVEOUT;
-
- if (wantarray) {
- my @ret = <READ>;
- close READ;
- waitpid $pid, 0;
- @ret;
- } else {
- local($/) = undef;
- my $ret = <READ>;
- close READ;
- waitpid $pid, 0;
- $ret;
- }
- } else {
- my $a;
- my @arr = @_;
- unless( $Shell::raw ){
- if (OS 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 $Shell::capture_stderr == 1;
- push @arr, '2>$null' if $Shell::capture_stderr == -1;
- open(SUBPROC, join(' ', $cmd, @arr, '|'))
- or die "Can't exec $cmd: $!\n";
- if (wantarray) {
- my @ret = <SUBPROC>;
- close SUBPROC; # XXX Oughta use a destructor.
- @ret;
- } else {
- local($/) = undef;
- my $ret = <SUBPROC>;
- close SUBPROC;
- $ret;
- }
- }
- };
- }
-
-sub AUTOLOAD {
- shift if ref $_[0] && $_[0]->isa( 'Shell' );
- my $cmd = $AUTOLOAD;
- $cmd =~ s/^.*:://;
- no strict 'refs';
- *$AUTOLOAD = _make_cmd($cmd);
- goto &$AUTOLOAD;
-}
-
-1;
-
-__END__
-
-=head1 NAME
-
-Shell - run shell commands transparently within perl
-
-=head1 SYNOPSIS
-
- use Shell qw(cat ps cp);
- $passwd = cat('</etc/passwd');
- @pslines = ps('-ww'),
- cp("/etc/passwd", "/tmp/passwd");
-
- # object oriented
- my $sh = Shell->new;
- print $sh->ls('-l');
-
-=head1 DESCRIPTION
-
-=head2 Caveats
-
-This package is included as a show case, illustrating a few Perl features.
-It shouldn't be used for production programs. Although it does provide a
-simple interface for obtaining the standard output of arbitrary commands,
-there may be better ways of achieving what you need.
-
-Running shell commands while obtaining standard output can be done with the
-C<qx/STRING/> operator, or by calling C<open> with a filename expression that
-ends with C<|>, giving you the option to process one line at a time.
-If you don't need to process standard output at all, you might use C<system>
-(in preference of doing a print with the collected standard output).
-
-Since Shell.pm and all of the aforementioned techniques use your system's
-shell to call some local command, none of them is portable across different
-systems. Note, however, that there are several built in functions and
-library packages providing portable implementations of functions operating
-on files, such as: C<glob>, C<link> and C<unlink>, C<mkdir> and C<rmdir>,
-C<rename>, C<File::Compare>, C<File::Copy>, C<File::Find> etc.
-
-Using Shell.pm while importing C<foo> creates a subroutine C<foo> in the
-namespace of the importing package. Calling C<foo> with arguments C<arg1>,
-C<arg2>,... results in a shell command C<foo arg1 arg2...>, where the
-function name and the arguments are joined with a blank. (See the subsection
-on Escaping magic characters.) Since the result is essentially a command
-line to be passed to the shell, your notion of arguments to the Perl
-function is not necessarily identical to what the shell treats as a
-command line token, to be passed as an individual argument to the program.
-Furthermore, note that this implies that C<foo> is callable by file name
-only, which frequently depends on the setting of the program's environment.
-
-Creating a Shell object gives you the opportunity to call any command
-in the usual OO notation without requiring you to announce it in the
-C<use Shell> statement. Don't assume any additional semantics being
-associated with a Shell object: in no way is it similar to a shell
-process with its environment or current working directory or any
-other setting.
-
-=head2 Escaping Magic Characters
-
-It is, in general, impossible to take care of quoting the shell's
-magic characters. For some obscure reason, however, Shell.pm quotes
-apostrophes (C<'>) and backslashes (C<\>) on UNIX, and spaces and
-quotes (C<">) on Windows.
-
-=head2 Configuration
-
-If you set $Shell::capture_stderr to 1, the module will attempt to
-capture the standard error output of the process as well. This is
-done by adding C<2E<gt>&1> to the command line, so don't try this on
-a system not supporting this redirection.
-
-Setting $Shell::capture_stderr to -1 will send standard error to the
-bit bucket (i.e., the equivalent of adding C<2E<gt>/dev/null> to the
-command line). The same caveat regarding redirection applies.
-
-If you set $Shell::raw to true no quoting whatsoever is done.
-
-=head1 BUGS
-
-Quoting should be off by default.
-
-It isn't possible to call shell built in commands, but it can be
-done by using a workaround, e.g. shell( '-c', 'set' ).
-
-Capturing standard error does not work on some systems (e.g. VMS).
-
-=head1 AUTHOR
-
- 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 $passwd;
-
- sub ps;
- print ps -ww;
-
- cp("/etc/passwd", "/etc/passwd.orig");
-
-That's maybe too gonzo. It actually exports an AUTOLOAD to the current
-package (and uncovered a bug in Beta 3, by the way). Maybe the usual
-usage should be
-
- use Shell qw(echo cat ps cp);
-
-Larry Wall
-
-Changes by Jenda@Krynicky.cz and Dave Cottle <d.cottle@csc.canterbury.ac.nz>.
-
-Changes for OO syntax and bug fixes by Casey West <casey@geeknest.com>.
-
-C<$Shell::raw> and pod rewrite by Wolfgang Laun.
-
-Rewritten to use closures rather than C<eval "string"> by Adriano Ferreira.
-
-=cut
+++ /dev/null
-#!./perl
-
-use Test::More tests => 7;
-
-BEGIN { use_ok('Shell'); }
-
-my $so = Shell->new;
-ok($so, 'Shell->new');
-
-my $Is_VMS = $^O eq 'VMS';
-my $Is_MSWin32 = $^O eq 'MSWin32';
-my $Is_NetWare = $^O eq 'NetWare';
-
-$Shell::capture_stderr = 1;
-
-# Now test that that works ..
-
-my $tmpfile = 'sht0001';
-while ( -f $tmpfile ) {
- $tmpfile++;
-}
-END { -f $tmpfile && (open STDERR, '>&SAVERR' and unlink $tmpfile) }
-
-no warnings 'once';
-# no false warning about Name "main::SAVERR" used only once: possible typo
-
-open(SAVERR, ">&STDERR");
-open(STDERR, ">$tmpfile");
-
-xXx_not_there(); # Ok someone could have a program called this :(
-
-# On os2 the warning is on by default...
-ok(($^O eq 'os2' xor !(-s $tmpfile)), '$Shell::capture_stderr');
-
-$Shell::capture_stderr = 0;
-
-# someone will have to fill in the blanks for other platforms
-
-if ($Is_VMS) {
- ok(directory(), 'Execute command');
- my @files = directory('*.*');
- ok(@files, 'Quoted arguments');
-
- ok(eq_array(\@files, [$so->directory('*.*')]), 'object method');
- eval { $so->directory };
- ok(!$@, '2 methods calls');
-} elsif ($Is_MSWin32) {
- ok(dir(), 'Execute command');
- my @files = grep !/bytes free$/, dir('*.*');
- ok(@files, 'Quoted arguments');
-
- ok(eq_array(\@files, [grep !/bytes free$/, $so->dir('*.*')]), 'object method');
- eval { $so->dir };
- ok(!$@, '2 methods calls');
-} else {
- ok(ls(), 'Execute command');
- my @files = ls('*');
- ok(@files, 'Quoted arguments');
-
- ok(eq_array(\@files, [$so->ls('*')]), 'object method');
- eval { $so->ls };
- ok(!$@, '2 methods calls');
-
-}
-open(STDERR, ">&SAVERR") ;
projects / p5sagit/p5-mst-13.2.git / commitdiff