62 lines
1.5 KiB
Plaintext
62 lines
1.5 KiB
Plaintext
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#!/bin/sh
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# find given append opt
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get_append_opt() {
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awk -v search="$1" '
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$1 == "append" || $1 == "APPEND" {
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split($0, a);
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for (i in a) {
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if (index(a[i], search) == 1) {
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print a[i];
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}
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}
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}' /boot/extlinux.conf | sort | uniq
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}
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# print default kernel options
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get_default_opts() {
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awk '
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$1 == "append" || $1 == "APPEND" {
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opts="";
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space="";
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split($0, a);
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for (i in a) {
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if (i != 1 \
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&& (index(a[i], "root=") != 1) \
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&& (index(a[i], "initrd=") != 1) \
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&& (index(a[i], "modules=") != 1)) {
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opts = opts space a[i];
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space = " ";
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}
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}
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print opts;
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}
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' /boot/extlinux.conf | sort | uniq
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}
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if ! [ -f /boot/extlinux.conf ]; then
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exit 0
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fi
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# check if we already have a generated extlinux.conf
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if grep -q '^# Generated by update-extlinux' /boot/extlinux.conf; then
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exit 0
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fi
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# try fish out the kernel opts from extlinuix.conf's append line
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root=$(get_append_opt 'root=' | head -n 1)
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modules=$(get_append_opt 'modules=' | head -n 1)
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opts=$(get_default_opts | head -n 1)
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# populate update-extlinux.conf with the info we know
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if [ -n "$root" ]; then
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sed -i -e "/^root=/s|.*|$root|g" /etc/update-extlinux.conf
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fi
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if [ -n "$modules" ]; then
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sed -i -e "/^modules=/s|.*|$modules|g" /etc/update-extlinux.conf
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fi
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if [ -n "$opts" ]; then
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sed -i -e "/^default_kernel_opts=/s|.*|default_kernel_opts=\"$opts\"|g" /etc/update-extlinux.conf
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fi
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