PREIN
/bin/sh
if [ $1 == 1 ]; then /usr/sbin/useradd -c "Nginx user" -s /bin/false -r -d /var/lib/nginx nginx 2>/dev/null || : fi
PREUN
/bin/sh
if [ $1 = 0 ]; then /sbin/service nginx stop >/dev/null 2>&1 /sbin/chkconfig --del nginx fi
POSTIN
/bin/sh
if [ $1 == 1 ]; then /sbin/chkconfig --add nginx fi
POSTUN
/bin/sh
if [ $1 == 2 ]; then /sbin/service nginx upgrade || : fi