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Change shell variable resolution order

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This commit is contained in:
Tom Eastep 2010-11-07 13:28:03 -08:00
parent 1e6b7c8130
commit 8a9aaff4e8
3 changed files with 16 additions and 13 deletions
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14
Shorewall/Perl/Shorewall/Config.pm
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@ -1858,16 +1858,19 @@ sub read_a_line(;$) {
my $count = 0; my $count = 0;
# #
# Expand Shell Variables using %params # Expand Shell Variables using %params and %ENV
# #
# $1 $2 $3 - $4 # $1 $2 $3 - $4
while ( $currentline =~ m( ^(.*?) \$({)? ([a-zA-Z]\w*) (?(2)}) (.*)$ )x ) { while ( $currentline =~ m( ^(.*?) \$({)? ([a-zA-Z]\w*) (?(2)}) (.*)$ )x ) {
unless ( exists $params{$3} ) {
$params{$3} = $ENV{$3} if exists $ENV{$3};
}
my $val = $params{$3}; my $val = $params{$3};
$params{$3} = $ENV{$3} if exists $ENV{$3};
unless ( defined $val ) { unless ( defined $val ) {
fatal_error "Undefined shell variable (\$$3)" unless exists $params{$3}; fatal_error "Undefined shell variable (\$$3)" unless exists $params{$3} || exists $ENV{$3};
$val = ''; $val = '';
} }
@ -2882,9 +2885,8 @@ sub unsupported_yes_no_warning( $ ) {
# Process the params file # Process the params file
# #
sub get_params() { sub get_params() {
my $fn = find_file 'params'; if ( my $fn = find_file 'params' ) {
if ( $fn ) {
progress_message2 "Processing $fn ..."; progress_message2 "Processing $fn ...";
my @params = `$globals{SHAREDIRPL}/getparams $fn`; my @params = `$globals{SHAREDIRPL}/getparams $fn`;

2
Shorewall/Perl/getparams
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@ -24,7 +24,7 @@
exported=$(env | sed 's/=.*//'); exported=$(env | sed 's/=.*//');
# #
# Sigh -- POSIX shells don't support 'typeset' or 'declare' # Sigh -- POSIX shells don't support 'typeset +x' or 'declare +x'
# #
for v in $exported; do for v in $exported; do

13
Shorewall/releasenotes.txt
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@ -30,13 +30,14 @@ VI. PROBLEMS CORRECTED AND NEW FEATURES IN PRIOR RELEASES
1) Previously, /usr/share/shorewall/compiler.pl expected the contents 1) Previously, /usr/share/shorewall/compiler.pl expected the contents
of the params file to be passed in the environment. Now, the of the params file to be passed in the environment. Now, the
compiler invokes the shell program /usr/share/shorewall/getparams compiler invokes a small shell program
to process the file and to pass the (variable,value) pairs back to (/usr/share/shorewall/getparams) to process the file and to pass
the compiler. the (variable,value) pairs back to the compiler.
In this new implementation, the contents of the environment of the Shell variable expansion uses the value from the params file if the
program that launches /usr/share/shorewall/compiler.pl overrides parameter was set in that file. Otherwise the current environment
the contents of /etc/shorewall/params. is used. If the variable does not appear in either place, an error
message is generated.
---------------------------------------------------------------------------- ----------------------------------------------------------------------------
I V. R E L E A S E 4 . 4 H I G H L I G H T S I V. R E L E A S E 4 . 4 H I G H L I G H T S