Commit | Line | Data |
---|---|---|
a0d0e21e LW |
1 | package Shell; |
2 | ||
4633a7c4 LW |
3 | use Config; |
4 | ||
a0d0e21e LW |
5 | sub import { |
6 | my $self = shift; | |
7 | my ($callpack, $callfile, $callline) = caller; | |
8 | my @EXPORT; | |
9 | if (@_) { | |
10 | @EXPORT = @_; | |
11 | } | |
12 | else { | |
13 | @EXPORT = 'AUTOLOAD'; | |
14 | } | |
15 | foreach $sym (@EXPORT) { | |
16 | *{"${callpack}::$sym"} = \&{"Shell::$sym"}; | |
17 | } | |
18 | }; | |
19 | ||
20 | AUTOLOAD { | |
21 | my $cmd = $AUTOLOAD; | |
22 | $cmd =~ s/^.*:://; | |
23 | eval qq { | |
2b2e613f | 24 | *$AUTOLOAD = sub { |
4633a7c4 LW |
25 | if (\@_ < 1) { |
26 | `$cmd`; | |
27 | } | |
28 | elsif (\$Config{'archname'} eq 'os2') { | |
29 | local(\*SAVEOUT, \*READ, \*WRITE); | |
30 | ||
31 | open SAVEOUT, '>&STDOUT' or die; | |
32 | pipe READ, WRITE or die; | |
33 | open STDOUT, '>&WRITE' or die; | |
34 | close WRITE; | |
35 | ||
36 | my \$pid = system(1, \$cmd, \@_); | |
37 | die "Can't execute $cmd: \$!\n" if \$pid < 0; | |
38 | ||
39 | open STDOUT, '>&SAVEOUT' or die; | |
40 | close SAVEOUT; | |
41 | ||
42 | if (wantarray) { | |
43 | my \@ret = <READ>; | |
44 | close READ; | |
45 | waitpid \$pid, 0; | |
46 | \@ret; | |
47 | } | |
48 | else { | |
49 | local(\$/) = undef; | |
50 | my \$ret = <READ>; | |
51 | close READ; | |
52 | waitpid \$pid, 0; | |
53 | \$ret; | |
54 | } | |
a0d0e21e LW |
55 | } |
56 | else { | |
57 | open(SUBPROC, "-|") | |
58 | or exec '$cmd', \@_ | |
59 | or die "Can't exec $cmd: \$!\n"; | |
60 | if (wantarray) { | |
61 | my \@ret = <SUBPROC>; | |
62 | close SUBPROC; # XXX Oughta use a destructor. | |
63 | \@ret; | |
64 | } | |
65 | else { | |
66 | local(\$/) = undef; | |
67 | my \$ret = <SUBPROC>; | |
68 | close SUBPROC; | |
69 | \$ret; | |
70 | } | |
71 | } | |
72 | } | |
73 | }; | |
74 | goto &$AUTOLOAD; | |
75 | } | |
76 | ||
77 | 1; | |
a5f75d66 AD |
78 | __END__ |
79 | ||
80 | =head1 NAME | |
81 | ||
82 | Shell - run shell commands transparently within perl | |
83 | ||
84 | =head1 SYNOPSIS | |
85 | ||
86 | See below. | |
87 | ||
88 | =head1 DESCRIPTION | |
89 | ||
90 | Date: Thu, 22 Sep 94 16:18:16 -0700 | |
91 | Message-Id: <9409222318.AA17072@scalpel.netlabs.com> | |
92 | To: perl5-porters@isu.edu | |
93 | From: Larry Wall <lwall@scalpel.netlabs.com> | |
94 | Subject: a new module I just wrote | |
95 | ||
96 | Here's one that'll whack your mind a little out. | |
97 | ||
98 | #!/usr/bin/perl | |
99 | ||
100 | use Shell; | |
101 | ||
102 | $foo = echo("howdy", "<funny>", "world"); | |
103 | print $foo; | |
104 | ||
105 | $passwd = cat("</etc/passwd"); | |
106 | print $passwd; | |
107 | ||
108 | sub ps; | |
109 | print ps -ww; | |
110 | ||
111 | cp("/etc/passwd", "/tmp/passwd"); | |
112 | ||
113 | That's maybe too gonzo. It actually exports an AUTOLOAD to the current | |
114 | package (and uncovered a bug in Beta 3, by the way). Maybe the usual | |
115 | usage should be | |
116 | ||
117 | use Shell qw(echo cat ps cp); | |
118 | ||
119 | Larry | |
120 | ||
121 | ||
122 | =head1 AUTHOR | |
123 | ||
124 | Larry Wall | |
125 | ||
126 | =cut |