mailinabox/setup/preflight.sh

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# Are we running as root?
if [[ $EUID -ne 0 ]]; then
echo "This script must be run as root. Please re-run like this:"
echo
echo "sudo $0"
echo
exit
fi
# Check that we are running on Ubuntu 14.04 LTS (or 14.04.xx).
if [ "`lsb_release -d | sed 's/.*:\s*//' | sed 's/14\.04\.[0-9]/14.04/' `" != "Ubuntu 14.04 LTS" ]; then
echo "Mail-in-a-Box only supports being installed on Ubuntu 14.04, sorry. You are running:"
echo
lsb_release -d | sed 's/.*:\s*//'
echo
echo "We can't write scripts that run on every possible setup, sorry."
exit
fi
# Check that we have enough memory.
#
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# /proc/meminfo reports free memory in kibibytes. Our baseline will be 768 MB,
# which is 750000 kibibytes.
#
# Skip the check if we appear to be running inside of Vagrant, because that's really just for testing.
TOTAL_PHYSICAL_MEM=$(head -n 1 /proc/meminfo | awk '{print $2}')
if [ $TOTAL_PHYSICAL_MEM -lt 750000 ]; then
if [ ! -d /vagrant ]; then
TOTAL_PHYSICAL_MEM=$(expr \( \( $TOTAL_PHYSICAL_MEM \* 1024 \) / 1000 \) / 1000)
echo "Your Mail-in-a-Box needs more memory (RAM) to function properly."
echo "Please provision a machine with at least 768 MB, 1 GB recommended."
echo "This machine has $TOTAL_PHYSICAL_MEM MB memory."
exit
fi
fi
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# Check that tempfs is mounted with exec
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MOUNTED_TMP_AS_NO_EXEC=$(grep "/tmp.*noexec" /proc/mounts)
if [ -n "$MOUNTED_TMP_AS_NO_EXEC" ]; then
echo "Mail-in-a-Box has to have exec rights on /tmp, please mount /tmp with exec"
exit
fi
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# Check that no .wgetrc exists
if [ -e ~/.wgetrc ]; then
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echo "Mail-in-a-Box expects no overrides to wget defaults, ~/.wgetrc exists"
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exit
fi