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