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