C:\>perl -e "print $^O, qq{\n};" MSWin32 #### $ perl -e "print $^O, qq{\n};" cygwin #### BASH=/cygdrive/c/GNUWin32/bin/bash BASH_ARGC=() BASH_ARGV=() BASH_LINENO=() BASH_SOURCE=() BASH_VERSINFO=([0]="3" [1]="2" [2]="39" [3]="20"[4]="release" [5]="i686-pc-cygwin") BASH_VERSION='3.2.39(20)-release'