| # |
| # @(#)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; |