| 1 |
joko |
1.1 |
package Shell; |
| 2 |
|
|
use 5.005_64; |
| 3 |
|
|
use strict; |
| 4 |
|
|
use warnings; |
| 5 |
|
|
our($capture_stderr, $VERSION, $AUTOLOAD); |
| 6 |
|
|
|
| 7 |
|
|
$VERSION = '0.4'; |
| 8 |
|
|
|
| 9 |
|
|
sub new { bless \$VERSION, shift } # Nothing better to bless |
| 10 |
|
|
sub DESTROY { } |
| 11 |
|
|
|
| 12 |
|
|
sub get_coderef { |
| 13 |
|
|
my $codepack = shift; |
| 14 |
|
|
my $method = shift; |
| 15 |
|
|
$codepack || return '[error]'; |
| 16 |
|
|
$method ||= ''; |
| 17 |
|
|
$method && ($codepack .= '::'); |
| 18 |
|
|
return eval '\&' . $codepack . $method . ';'; |
| 19 |
|
|
} |
| 20 |
|
|
|
| 21 |
|
|
sub import { |
| 22 |
|
|
my $self = shift; |
| 23 |
|
|
my ($callpack, $callfile, $callline) = caller; |
| 24 |
|
|
my @EXPORT; |
| 25 |
|
|
if (@_) { |
| 26 |
|
|
@EXPORT = @_; |
| 27 |
|
|
} else { |
| 28 |
|
|
@EXPORT = 'AUTOLOAD'; |
| 29 |
|
|
} |
| 30 |
|
|
foreach my $sym (@EXPORT) { |
| 31 |
|
|
no strict 'refs'; |
| 32 |
|
|
*{"${callpack}::$sym"} = get_coderef($self, $sym); |
| 33 |
|
|
} |
| 34 |
|
|
} |
| 35 |
|
|
|
| 36 |
|
|
sub AUTOLOAD { |
| 37 |
|
|
shift if ref $_[0] && $_[0]->isa( 'Shell' ); |
| 38 |
|
|
my $cmd = $AUTOLOAD; |
| 39 |
|
|
$cmd =~ s/^.*:://; |
| 40 |
|
|
eval <<"*END*"; |
| 41 |
|
|
sub $AUTOLOAD { |
| 42 |
|
|
if (\@_ < 1) { |
| 43 |
|
|
\$Shell::capture_stderr ? `$cmd 2>&1` : `$cmd`; |
| 44 |
|
|
} elsif ('$^O' eq 'os2') { |
| 45 |
|
|
local(\*SAVEOUT, \*READ, \*WRITE); |
| 46 |
|
|
|
| 47 |
|
|
open SAVEOUT, '>&STDOUT' or die; |
| 48 |
|
|
pipe READ, WRITE or die; |
| 49 |
|
|
open STDOUT, '>&WRITE' or die; |
| 50 |
|
|
close WRITE; |
| 51 |
|
|
|
| 52 |
|
|
my \$pid = system(1, '$cmd', \@_); |
| 53 |
|
|
die "Can't execute $cmd: \$!\\n" if \$pid < 0; |
| 54 |
|
|
|
| 55 |
|
|
open STDOUT, '>&SAVEOUT' or die; |
| 56 |
|
|
close SAVEOUT; |
| 57 |
|
|
|
| 58 |
|
|
if (wantarray) { |
| 59 |
|
|
my \@ret = <READ>; |
| 60 |
|
|
close READ; |
| 61 |
|
|
waitpid \$pid, 0; |
| 62 |
|
|
\@ret; |
| 63 |
|
|
} else { |
| 64 |
|
|
local(\$/) = undef; |
| 65 |
|
|
my \$ret = <READ>; |
| 66 |
|
|
close READ; |
| 67 |
|
|
waitpid \$pid, 0; |
| 68 |
|
|
\$ret; |
| 69 |
|
|
} |
| 70 |
|
|
} else { |
| 71 |
|
|
my \$a; |
| 72 |
|
|
my \@arr = \@_; |
| 73 |
|
|
if ('$^O' eq 'MSWin32') { |
| 74 |
|
|
# XXX this special-casing should not be needed |
| 75 |
|
|
# if we do quoting right on Windows. :-( |
| 76 |
|
|
# |
| 77 |
|
|
# First, escape all quotes. Cover the case where we |
| 78 |
|
|
# want to pass along a quote preceded by a backslash |
| 79 |
|
|
# (i.e., C<"param \\""" end">). |
| 80 |
|
|
# Ugly, yup? You know, windoze. |
| 81 |
|
|
# Enclose in quotes only the parameters that need it: |
| 82 |
|
|
# try this: c:\> dir "/w" |
| 83 |
|
|
# and this: c:\> dir /w |
| 84 |
|
|
for (\@arr) { |
| 85 |
|
|
s/"/\\\\"/g; |
| 86 |
|
|
s/\\\\\\\\"/\\\\\\\\"""/g; |
| 87 |
|
|
\$_ = qq["\$_"] if /\\s/; |
| 88 |
|
|
} |
| 89 |
|
|
} else { |
| 90 |
|
|
for (\@arr) { |
| 91 |
|
|
s/(['\\\\])/\\\\\$1/g; |
| 92 |
|
|
\$_ = \$_; |
| 93 |
|
|
} |
| 94 |
|
|
} |
| 95 |
|
|
push \@arr, '2>&1' if \$Shell::capture_stderr; |
| 96 |
|
|
open(SUBPROC, join(' ', '$cmd', \@arr, '|')) |
| 97 |
|
|
or die "Can't exec $cmd: \$!\\n"; |
| 98 |
|
|
if (wantarray) { |
| 99 |
|
|
my \@ret = <SUBPROC>; |
| 100 |
|
|
close SUBPROC; # XXX Oughta use a destructor. |
| 101 |
|
|
\@ret; |
| 102 |
|
|
} else { |
| 103 |
|
|
local(\$/) = undef; |
| 104 |
|
|
my \$ret = <SUBPROC>; |
| 105 |
|
|
close SUBPROC; |
| 106 |
|
|
\$ret; |
| 107 |
|
|
} |
| 108 |
|
|
} |
| 109 |
|
|
} |
| 110 |
|
|
*END* |
| 111 |
|
|
|
| 112 |
|
|
die "$@\n" if $@; |
| 113 |
|
|
goto &$AUTOLOAD; |
| 114 |
|
|
} |
| 115 |
|
|
|
| 116 |
|
|
1; |
| 117 |
|
|
|
| 118 |
|
|
__END__ |
| 119 |
|
|
|
| 120 |
|
|
=head1 NAME |
| 121 |
|
|
|
| 122 |
|
|
Shell - run shell commands transparently within perl |
| 123 |
|
|
|
| 124 |
|
|
=head1 SYNOPSIS |
| 125 |
|
|
|
| 126 |
|
|
See below. |
| 127 |
|
|
|
| 128 |
|
|
=head1 DESCRIPTION |
| 129 |
|
|
|
| 130 |
|
|
Date: Thu, 22 Sep 94 16:18:16 -0700 |
| 131 |
|
|
Message-Id: <9409222318.AA17072@scalpel.netlabs.com> |
| 132 |
|
|
To: perl5-porters@isu.edu |
| 133 |
|
|
From: Larry Wall <lwall@scalpel.netlabs.com> |
| 134 |
|
|
Subject: a new module I just wrote |
| 135 |
|
|
|
| 136 |
|
|
Here's one that'll whack your mind a little out. |
| 137 |
|
|
|
| 138 |
|
|
#!/usr/bin/perl |
| 139 |
|
|
|
| 140 |
|
|
use Shell; |
| 141 |
|
|
|
| 142 |
|
|
$foo = echo("howdy", "<funny>", "world"); |
| 143 |
|
|
print $foo; |
| 144 |
|
|
|
| 145 |
|
|
$passwd = cat("</etc/passwd"); |
| 146 |
|
|
print $passwd; |
| 147 |
|
|
|
| 148 |
|
|
sub ps; |
| 149 |
|
|
print ps -ww; |
| 150 |
|
|
|
| 151 |
|
|
cp("/etc/passwd", "/tmp/passwd"); |
| 152 |
|
|
|
| 153 |
|
|
That's maybe too gonzo. It actually exports an AUTOLOAD to the current |
| 154 |
|
|
package (and uncovered a bug in Beta 3, by the way). Maybe the usual |
| 155 |
|
|
usage should be |
| 156 |
|
|
|
| 157 |
|
|
use Shell qw(echo cat ps cp); |
| 158 |
|
|
|
| 159 |
|
|
Larry |
| 160 |
|
|
|
| 161 |
|
|
|
| 162 |
|
|
If you set $Shell::capture_stderr to 1, the module will attempt to |
| 163 |
|
|
capture the STDERR of the process as well. |
| 164 |
|
|
|
| 165 |
|
|
The module now should work on Win32. |
| 166 |
|
|
|
| 167 |
|
|
Jenda |
| 168 |
|
|
|
| 169 |
|
|
There seemed to be a problem where all arguments to a shell command were |
| 170 |
|
|
quoted before being executed. As in the following example: |
| 171 |
|
|
|
| 172 |
|
|
cat('</etc/passwd'); |
| 173 |
|
|
ls('*.pl'); |
| 174 |
|
|
|
| 175 |
|
|
really turned into: |
| 176 |
|
|
|
| 177 |
|
|
cat '</etc/passwd' |
| 178 |
|
|
ls '*.pl' |
| 179 |
|
|
|
| 180 |
|
|
instead of: |
| 181 |
|
|
|
| 182 |
|
|
cat </etc/passwd |
| 183 |
|
|
ls *.pl |
| 184 |
|
|
|
| 185 |
|
|
and of course, this is wrong. |
| 186 |
|
|
|
| 187 |
|
|
I have fixed this bug, it was brought up by Wolfgang Laun [ID 20000326.008] |
| 188 |
|
|
|
| 189 |
|
|
Casey |
| 190 |
|
|
|
| 191 |
|
|
=head2 OBJECT ORIENTED SYNTAX |
| 192 |
|
|
|
| 193 |
|
|
Shell now has an OO interface. Good for namespace conservation |
| 194 |
|
|
and shell representation. |
| 195 |
|
|
|
| 196 |
|
|
use Shell; |
| 197 |
|
|
my $sh = Shell->new; |
| 198 |
|
|
print $sh->ls; |
| 199 |
|
|
|
| 200 |
|
|
Casey |
| 201 |
|
|
|
| 202 |
|
|
=head1 AUTHOR |
| 203 |
|
|
|
| 204 |
|
|
Larry Wall |
| 205 |
|
|
|
| 206 |
|
|
Changes by Jenda@Krynicky.cz and Dave Cottle <d.cottle@csc.canterbury.ac.nz> |
| 207 |
|
|
|
| 208 |
|
|
Changes and bug fixes by Casey Tweten <crt@kiski.net> |
| 209 |
|
|
|
| 210 |
|
|
=cut |
Parent Directory
| 
Revision Log
