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https://github.com/linuxboot/heads.git
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68 lines
1.5 KiB
Bash
Executable File
68 lines
1.5 KiB
Bash
Executable File
#!/bin/sh
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# Scan for USB installation options
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set -e -o pipefail
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. /etc/functions
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. /etc/config
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# Unmount any previous boot device
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if grep -q /boot /proc/mounts ; then
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umount /boot \
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|| die '$CONFIG_USB_BOOT_DEV: Unable to unmount /boot'
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fi
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# Mount the USB boot device
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if ! grep -q /media /proc/mounts ; then
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mount-usb "$CONFIG_USB_BOOT_DEV" \
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|| die '$CONFIG_USB_BOOT_DEV: Unable to mount /media'
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fi
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# Check for ISO first
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get_menu_option() {
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echo "+++ Select your ISO boot option:"
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n=0
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while read option
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do
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n=`expr $n + 1`
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echo "$n. $option"
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done < /tmp/iso_menu.txt
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read \
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-p "Choose the ISO boot option [1-$n, s for standard boot, a to abort]: " \
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option_index
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if [ "$option_index" = "a" ]; then
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die "Aborting boot attempt"
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fi
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if [ "$option_index" = "s" ]; then
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option=""
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return
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fi
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option=`head -n $option_index /tmp/iso_menu.txt | tail -1`
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}
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# create ISO menu options
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ls -1r /media/*.iso 2>/dev/null > /tmp/iso_menu.txt || true
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if [ `cat /tmp/iso_menu.txt | wc -l` -gt 0 ]; then
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option_confirm=""
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while [ -z "$option" -a "$option_index" != "s" ]
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do
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get_menu_option
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done
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if [ -n "$option" ]; then
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MOUNTED_ISO=$option
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ISO=${option:7} # remove /media/ to get device relative path
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kexec-iso-init $MOUNTED_ISO $ISO $CONFIG_USB_BOOT_DEV
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die "Something failed in iso init"
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fi
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fi
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echo "!!! Could not find any ISO, trying bootable USB"
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# Attempt to pull verified config from device
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kexec-select-boot -b /media/ -c "*.cfg" -u
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die "Something failed in selecting boot"
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