Test wether you're exposed to ghost (CVE-2015-0235). All kudos go to Qualys Security
/tmp/ghost-checker (master)$ make
cc -o ghost ghost.c
/tmp/ghost-checker (master)$ ./ghost
not vulnerable
/tmp/ghost-checker (master)$ make clean
rm ghost
Qualys Security Team http://www.openwall.com/lists/oss-security/2015/01/27/9