How to check if running in Cygwin, Mac or Linux?

Question

I have a shell script that is used both on Windows/Cygwin and Mac and Linux. It needs slightly different variables for each versions.

How can a shell/bash script de

Answer 1

http://en.wikipedia.org/wiki/Uname

All the info you'll ever need. Google is your friend.

Use uname -s to query the system name.

• Mac: Darwin
• Cygwin: CYGWIN_...
• Linux: various, LINUX for most