memtest86plus/memtest-setup

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#!/bin/bash
# GRUB 2 template
G2TEMPL="20_memtest86+"
# GRUB 2 environment file
CONF_FILE="/etc/memtest86+.conf"
# GRUB2 configuration file
GRUB2CFG="/boot/grub2/grub.cfg"
# GRUB2 environment variable to control image type
CONF_VAR="INSTALL_ELF"
# whether to install ELF image
ELF=1
if [ "$1" = "--help" -o "$1" = "-h" ]; then
cat <<:EOF
Usage:
memtest-setup [-b|-e|-h]
memtest-setup [--bin|--elf|--help]
The memtest-setup utility installs Memtest86+ into GRUB 2 boot loader menu.
It installs GRUB 2 template into /etc/grub.d directory.
GRUB 2 configuration file needs to be regenerated manually by running:
grub2-mkconfig -o $GRUB2CFG
This is not done automatically because it could overwrite any custom changes
in GRUB 2 configuration file.
Options:
-b, --bin Install a binary Memtest86+ image.
-e, --elf Install an ELF Memtest86+ image (the default).
-h, --help Print a help message and exit.
:EOF
exit 0
fi
[ "$1" = "-b" -o "$1" = "--bin" ] && ELF=0
[ "$1" = "-e" -o "$1" = "--elf" ] && ELF=1
if [ -d /sys/firmware/efi ]; then
echo "ERROR: memtest86+ does not support EFI platforms."
exit 254
fi
if [ ! -r "$GRUB2CFG" ]; then
echo "ERROR: unable to read grub configuration file. Do you have enough permissions?"
echo "Try to run as root."
exit 249
fi
# install GRUB 2 template
if [ ! -d /etc/grub.d ]; then
echo "ERROR: unable to find /etc/grub.d"
exit 253
fi
if [ ! -r /usr/share/memtest86+/$G2TEMPL ]; then
echo "ERROR: unable to find GRUB 2 template."
exit 251
fi
if ! cp /usr/share/memtest86+/$G2TEMPL /etc/grub.d; then
echo "ERROR: unable to copy GRUB 2 template, do you have write permission to"
echo "/etc/grub.d?"
# EX_IOERR
exit 74
fi
if [ ! -w "$CONF_FILE" ]
then
echo "ERROR: file '$CONF_FILE' is not writable."
exit 250
fi
chmod a+x /etc/grub.d/$G2TEMPL
echo "GRUB 2 template installed."
echo "Do not forget to regenerate your grub.cfg by:"
echo " # grub2-mkconfig -o $GRUB2CFG"
# update/add configuration variable to the configuration file
if grep -q "^\s*$CONF_VAR\s*=" "$CONF_FILE"
then
sed -i "/^\s*$CONF_VAR\s*=/ s/\(\s*$CONF_VAR\s*=[\"']\?\)[^\"']*\([\"']\?\s*\)/\1${ELF}\2/g" "$CONF_FILE"
else
echo "$CONF_VAR=\"$ELF\"" >> "$CONF_FILE"
fi
echo "Setup complete."