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1 | package Shell; |
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2 | use vars qw($capture_stderr $VERSION); |
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3 | |
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4 | $VERSION = '0.2'; |
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5 | |
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6 | sub import { |
7 | my $self = shift; |
8 | my ($callpack, $callfile, $callline) = caller; |
9 | my @EXPORT; |
10 | if (@_) { |
11 | @EXPORT = @_; |
12 | } |
13 | else { |
14 | @EXPORT = 'AUTOLOAD'; |
15 | } |
16 | foreach $sym (@EXPORT) { |
17 | *{"${callpack}::$sym"} = \&{"Shell::$sym"}; |
18 | } |
19 | }; |
20 | |
21 | AUTOLOAD { |
22 | my $cmd = $AUTOLOAD; |
23 | $cmd =~ s/^.*:://; |
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24 | eval <<"*END*"; |
25 | sub $AUTOLOAD { |
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26 | if (\@_ < 1) { |
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27 | \$Shell::capture_stderr ? `$cmd 2>&1` : `$cmd`; |
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28 | } |
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29 | elsif ('$^O' eq 'os2') { |
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30 | local(\*SAVEOUT, \*READ, \*WRITE); |
31 | |
32 | open SAVEOUT, '>&STDOUT' or die; |
33 | pipe READ, WRITE or die; |
34 | open STDOUT, '>&WRITE' or die; |
35 | close WRITE; |
36 | |
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37 | my \$pid = system(1, '$cmd', \@_); |
38 | die "Can't execute $cmd: \$!\\n" if \$pid < 0; |
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39 | |
40 | open STDOUT, '>&SAVEOUT' or die; |
41 | close SAVEOUT; |
42 | |
43 | if (wantarray) { |
44 | my \@ret = <READ>; |
45 | close READ; |
46 | waitpid \$pid, 0; |
47 | \@ret; |
48 | } |
49 | else { |
50 | local(\$/) = undef; |
51 | my \$ret = <READ>; |
52 | close READ; |
53 | waitpid \$pid, 0; |
54 | \$ret; |
55 | } |
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56 | } |
57 | else { |
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58 | my \$a; |
59 | my \@arr = \@_; |
60 | if ('$^O' eq 'MSWin32') { |
61 | # XXX this special-casing should not be needed |
62 | # if we do quoting right on Windows. :-( |
63 | # |
64 | # First, escape all quotes. Cover the case where we |
65 | # want to pass along a quote preceded by a backslash |
66 | # (i.e., C<"param \\""" end">). |
67 | # Ugly, yup? You know, windoze. |
68 | # Enclose in quotes only the parameters that need it: |
69 | # try this: c:\> dir "/w" |
70 | # and this: c:\> dir /w |
71 | for (\@arr) { |
72 | s/"/\\\\"/g; |
73 | s/\\\\\\\\"/\\\\\\\\"""/g; |
74 | \$_ = qq["\$_"] if /\s/; |
75 | } |
76 | } |
77 | else { |
78 | for (\@arr) { |
79 | s/(['\\\\])/\\\\\$1/g; |
80 | \$_ = "'\$_'"; |
81 | } |
82 | } |
83 | push \@arr, '2>&1' if \$Shell::capture_stderr; |
84 | open(SUBPROC, join(' ', '$cmd', \@arr, '|')) |
85 | or die "Can't exec $cmd: \$!\\n"; |
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86 | if (wantarray) { |
87 | my \@ret = <SUBPROC>; |
88 | close SUBPROC; # XXX Oughta use a destructor. |
89 | \@ret; |
90 | } |
91 | else { |
92 | local(\$/) = undef; |
93 | my \$ret = <SUBPROC>; |
94 | close SUBPROC; |
95 | \$ret; |
96 | } |
97 | } |
98 | } |
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99 | *END* |
100 | |
101 | die "$@\n" if $@; |
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102 | goto &$AUTOLOAD; |
103 | } |
104 | |
105 | 1; |
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106 | __END__ |
107 | |
108 | =head1 NAME |
109 | |
110 | Shell - run shell commands transparently within perl |
111 | |
112 | =head1 SYNOPSIS |
113 | |
114 | See below. |
115 | |
116 | =head1 DESCRIPTION |
117 | |
118 | Date: Thu, 22 Sep 94 16:18:16 -0700 |
119 | Message-Id: <9409222318.AA17072@scalpel.netlabs.com> |
120 | To: perl5-porters@isu.edu |
121 | From: Larry Wall <lwall@scalpel.netlabs.com> |
122 | Subject: a new module I just wrote |
123 | |
124 | Here's one that'll whack your mind a little out. |
125 | |
126 | #!/usr/bin/perl |
127 | |
128 | use Shell; |
129 | |
130 | $foo = echo("howdy", "<funny>", "world"); |
131 | print $foo; |
132 | |
133 | $passwd = cat("</etc/passwd"); |
134 | print $passwd; |
135 | |
136 | sub ps; |
137 | print ps -ww; |
138 | |
139 | cp("/etc/passwd", "/tmp/passwd"); |
140 | |
141 | That's maybe too gonzo. It actually exports an AUTOLOAD to the current |
142 | package (and uncovered a bug in Beta 3, by the way). Maybe the usual |
143 | usage should be |
144 | |
145 | use Shell qw(echo cat ps cp); |
146 | |
147 | Larry |
148 | |
149 | |
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150 | If you set $Shell::capture_stderr to 1, the module will attempt to |
151 | capture the STDERR of the process as well. |
152 | |
153 | The module now should work on Win32. |
154 | |
155 | Jenda |
156 | |
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157 | =head1 AUTHOR |
158 | |
159 | Larry Wall |
160 | |
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161 | Changes by Jenda@Krynicky.cz and Dave Cottle <d.cottle@csc.canterbury.ac.nz> |
162 | |
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163 | =cut |