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# @(#)dotsh.pl 03/19/94 |
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# This library is no longer being maintained, and is included for backward |
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# compatibility with Perl 4 programs which may require it. |
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# |
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# In particular, this should not be used as an example of modern Perl |
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# programming techniques. |
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# Author: Charles Collins |
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# Description: |
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# This routine takes a shell script and 'dots' it into the current perl |
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# environment. This makes it possible to use existing system scripts |
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# to alter environment variables on the fly. |
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# |
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# Usage: |
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# &dotsh ('ShellScript', 'DependentVariable(s)'); |
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# |
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# where |
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# |
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# 'ShellScript' is the full name of the shell script to be dotted |
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# |
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# 'DependentVariable(s)' is an optional list of shell variables in the |
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# form VARIABLE=VALUE,VARIABLE=VALUE,... that 'ShellScript' is |
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# dependent upon. These variables MUST be defined using shell syntax. |
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# |
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# Example: |
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# &dotsh ('/foo/bar', 'arg1'); |
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# &dotsh ('/foo/bar'); |
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# &dotsh ('/foo/bar arg1 ... argN'); |
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# |
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sub dotsh { |
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local(@sh) = @_; |
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local($tmp,$key,$shell,$command,$args,$vars) = ''; |
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local(*dotsh); |
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undef *dotsh; |
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$dotsh = shift(@sh); |
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@dotsh = split (/\s/, $dotsh); |
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$command = shift (@dotsh); |
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$args = join (" ", @dotsh); |
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$vars = join ("\n", @sh); |
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open (_SH_ENV, "$command") || die "Could not open $dotsh!\n"; |
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chop($_ = <_SH_ENV>); |
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$shell = "$1 -c" if ($_ =~ /^\#\!\s*(\S+(\/sh|\/ksh|\/zsh|\/csh))\s*$/); |
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close (_SH_ENV); |
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if (!$shell) { |
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if ($ENV{'SHELL'} =~ /\/sh$|\/ksh$|\/zsh$|\/bash$|\/csh$/) { |
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$shell = "$ENV{'SHELL'} -c"; |
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} else { |
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print "SHELL not recognized!\nUsing /bin/sh...\n"; |
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$shell = "/bin/sh -c"; |
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} |
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} |
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if (length($vars) > 0) { |
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open (_SH_ENV, "$shell \"$vars && . $command $args && set \" |") || die; |
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} else { |
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open (_SH_ENV, "$shell \". $command $args && set \" |") || die; |
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} |
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while (<_SH_ENV>) { |
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chop; |
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m/^([^=]*)=(.*)/s; |
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$ENV{$1} = $2; |
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} |
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close (_SH_ENV); |
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foreach $key (keys(%ENV)) { |
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$tmp .= "\$$key = \$ENV{'$key'};" if $key =~ /^[A-Za-z]\w*$/; |
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} |
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eval $tmp; |
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} |
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1; |
