Hi,
I have been having an issue with dynamic loading of sybase libraries in a perl script that runs in a captive environment. I am not able to source any environment variables becuase the perl script fires up in a secure shell which simply runs the perl script and then exits. I saw this bit of code from Tye which has solved the load library issue. 
BEGIN {
    my $need= '/usr/local/sybase/lib';
    my $ld= $ENV{LD_LIBRARY_PATH};
    if(  ! $ld  ) {
        $ENV{LD_LIBRARY_PATH}= $need;
    } elsif(  $ld !~ m#(^|:)\Q$need\E(:|$)#  ) {
        $ENV{LD_LIBRARY_PATH} .= ':' . $need;
    } else {
        $need= "";
    }
    if(  $need  ) {
        exec 'env', $^X, $0, @ARGV;
    }
}

[download]
However I still have an issue with the SYBASE variable which will need to be set in the same way. My question is how do I adapt this piece of code to also deal with the SYBASE variable and only exec once instead of exec after each variable setting ?
e.g. 
BEGIN {
    my $needlib= '/usr/local/sybase/lib';
    my $needsyb= '/usr/local/sybase';
    my $sybpath= $ENV{SYBASE};
    my $ld= $ENV{LD_LIBRARY_PATH};
    if(  ! $ld  ) {
        $ENV{LD_LIBRARY_PATH}= $needlib;
    } elsif(  $ld !~ m#(^|:)\Q$needlib\E(:|$)#  ) {
        $ENV{LD_LIBRARY_PATH} .= ':' . $needlib;
    } else {
        $needlib= "";
    }
    if(  $needlib  ) {
        exec 'env', $^X, $0, @ARGV;
    }

   if(  ! $sybpath  ) {
        $ENV{SYBASE}= $needsyb;
    } elsif(  $ld !~ m#(^|:)\Q$needsyb\E(:|$)#  ) {
        $ENV{SYBASE} .= ':' . $needsyb;
    } else {
        $needsyb= "";
    }
    if(  $needsyb  ) {
        exec 'env', $^X, $0, @ARGV;
    }

}

[download]
My perl knowledge is basic and I'm sure the above code could be tidied up. Any comments welcome

In reply to path setting in captive environment by Anonymous Monk

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