# We need the $SYBASE and $LD_LIBRARY_PATH environment variables to be able
# to use the Sybase::Simple library (because it links to libsybct.so in
# $SYBASE/$SYBASE_OCS/lib), but if we are invoked through cron, then
# ~/.profile doesn't get sourced and we are stuck with a nearly empty %ENV
# hash.  So if we detect $SYBASE is not in %ENV, reexec through a shell that
# first sources in the necessary environment variables.

unless (exists $ENV{SYBASE}) {
    # $^X is the path to the current perl interpreter
    # $0 is the script itself
    exec '/bin/sh', '-c', ". /db/sybsdk/SYBASE.sh ; exec $^X $0 @ARGV";
}

# even with the above, we need to wrap the import of the Sybase Perl
# module in a runtime block as to avoid initialization by the Perl compiler
# prior to runtime (which checks for the necessary $SYBASE env variables).
# See 'perldoc perlfaq8' as to the difference between 'use' and 'require'.
# Basically: 'use' is ran at compile time, 'require' at runtime.
require Sybase::Simple;