| 1 | package Psh::Support::Env; |
| 2 | |
| 3 | # |
| 4 | # string do_setenv(string command) |
| 5 | # |
| 6 | # command is of the form "VAR VALUE" or "VAR = VALUE" or "VAR"; sets |
| 7 | # $ENV{VAR} to "VALUE" in the first two cases, or to "$VAR" in the |
| 8 | # third case unless $VAR is undefined. Used by the setenv and export |
| 9 | # builtins. Returns VAR (which is a string with no $). |
| 10 | |
| 11 | sub do_setenv |
| 12 | { |
| 13 | my $arg = shift; |
| 14 | if( $arg=~ /^\s*(\w+)(\s+|\s*=\s*)(.+)/ ) { |
| 15 | my $var= $1; |
| 16 | my $value= $3; |
| 17 | if( $value=~ /^\'(.*)\'\s*$/ ) { |
| 18 | # If single quotes were used, do not interpret |
| 19 | # variables |
| 20 | $ENV{$var}=$1; |
| 21 | } else { |
| 22 | $var =~ s/^\$//; |
| 23 | if ($value=~ /^\"(.*)\"/) { |
| 24 | $value=$1; |
| 25 | } |
| 26 | # Use eval so that variables may appear on RHS |
| 27 | # ($value); use protected_eval so that lexicals |
| 28 | # in this file don't shadow package variables |
| 29 | Psh::PerlEval::protected_eval("\$ENV{$var}=\"$value\"", 'do_setenv'); |
| 30 | } |
| 31 | return $var; |
| 32 | } elsif( $arg=~ /(\w+)/ ) { |
| 33 | my $var= $1; |
| 34 | $var =~ s/^\$//; |
| 35 | Psh::PerlEval::protected_eval("\$ENV{$var}=\$$var if defined(\$$var);", |
| 36 | 'do_setenv'); |
| 37 | return $var; |
| 38 | } |
| 39 | return ''; |
| 40 | } |
| 41 | |
| 42 | |
| 43 | 1; |