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a0d0e21e LW |
1 | # |
2 | # @(#)dotsh.pl 03/19/94 | |
3 | # | |
a6d71656 GS |
4 | # This library is no longer being maintained, and is included for backward |
5 | # compatibility with Perl 4 programs which may require it. | |
6d10188c S |
6 | # This legacy library is deprecated and will be removed in a future |
7 | # release of perl. | |
a6d71656 GS |
8 | # |
9 | # In particular, this should not be used as an example of modern Perl | |
10 | # programming techniques. | |
11 | # | |
a0d0e21e LW |
12 | # Author: Charles Collins |
13 | # | |
14 | # Description: | |
15 | # This routine takes a shell script and 'dots' it into the current perl | |
16 | # environment. This makes it possible to use existing system scripts | |
17 | # to alter environment variables on the fly. | |
18 | # | |
19 | # Usage: | |
20 | # &dotsh ('ShellScript', 'DependentVariable(s)'); | |
21 | # | |
22 | # where | |
23 | # | |
24 | # 'ShellScript' is the full name of the shell script to be dotted | |
25 | # | |
26 | # 'DependentVariable(s)' is an optional list of shell variables in the | |
27 | # form VARIABLE=VALUE,VARIABLE=VALUE,... that 'ShellScript' is | |
28 | # dependent upon. These variables MUST be defined using shell syntax. | |
29 | # | |
30 | # Example: | |
2359510d SD |
31 | # &dotsh ('/foo/bar', 'arg1'); |
32 | # &dotsh ('/foo/bar'); | |
33 | # &dotsh ('/foo/bar arg1 ... argN'); | |
a0d0e21e | 34 | # |
6d10188c | 35 | |
a0d0e21e LW |
36 | sub dotsh { |
37 | local(@sh) = @_; | |
90758174 AD |
38 | local($tmp,$key,$shell,$command,$args,$vars) = ''; |
39 | local(*dotsh); | |
40 | undef *dotsh; | |
a0d0e21e LW |
41 | $dotsh = shift(@sh); |
42 | @dotsh = split (/\s/, $dotsh); | |
43 | $command = shift (@dotsh); | |
44 | $args = join (" ", @dotsh); | |
45 | $vars = join ("\n", @sh); | |
46 | open (_SH_ENV, "$command") || die "Could not open $dotsh!\n"; | |
47 | chop($_ = <_SH_ENV>); | |
48 | $shell = "$1 -c" if ($_ =~ /^\#\!\s*(\S+(\/sh|\/ksh|\/zsh|\/csh))\s*$/); | |
49 | close (_SH_ENV); | |
50 | if (!$shell) { | |
90758174 | 51 | if ($ENV{'SHELL'} =~ /\/sh$|\/ksh$|\/zsh$|\/bash$|\/csh$/) { |
a0d0e21e LW |
52 | $shell = "$ENV{'SHELL'} -c"; |
53 | } else { | |
54 | print "SHELL not recognized!\nUsing /bin/sh...\n"; | |
55 | $shell = "/bin/sh -c"; | |
56 | } | |
57 | } | |
58 | if (length($vars) > 0) { | |
2359510d | 59 | open (_SH_ENV, "$shell \"$vars && . $command $args && set \" |") || die; |
a0d0e21e | 60 | } else { |
2359510d | 61 | open (_SH_ENV, "$shell \". $command $args && set \" |") || die; |
a0d0e21e LW |
62 | } |
63 | ||
a0d0e21e LW |
64 | while (<_SH_ENV>) { |
65 | chop; | |
3730ca99 | 66 | m/^([^=]*)=(.*)/s; |
67 | $ENV{$1} = $2; | |
a0d0e21e LW |
68 | } |
69 | close (_SH_ENV); | |
a0d0e21e | 70 | |
4633a7c4 | 71 | foreach $key (keys(%ENV)) { |
a0d0e21e LW |
72 | $tmp .= "\$$key = \$ENV{'$key'};" if $key =~ /^[A-Za-z]\w*$/; |
73 | } | |
74 | eval $tmp; | |
75 | } | |
76 | 1; |