68 lines
2.0 KiB
Perl
68 lines
2.0 KiB
Perl
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#
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# @(#)dotsh.pl 03/19/94
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#
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# Author: Charles Collins
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#
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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 ('/tmp/foo', 'arg1');
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# &dotsh ('/tmp/foo');
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# &dotsh ('/tmp/foo 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,$shell,*dotsh,$command,$args,$vars) = '';
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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$|\/zsh$|\/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($vars) > 0) {
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system "$shell \"$vars;. $command $args; set > /tmp/_sh_env$$\"";
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} else {
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system "$shell \". $command $args; set > /tmp/_sh_env$$\"";
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}
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open (_SH_ENV, "/tmp/_sh_env$$") || die "Could not open /tmp/_sh_env$$!\n";
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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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system "rm -f /tmp/_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;
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