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86530b38 AT |
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; |