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From 6240d78097c6f828aa2ca3b50ac322b41dc41fd1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Fri, 23 Aug 2019 11:34:45 +0200
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Subject: [PATCH] kernel-install: do not require non-empty kernel cmdline
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When booting with Fedora-Server-dvd-x86_64-30-20190411.n.0.iso,
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/proc/cmdline is empty (libvirt, qemu host with bios, not sure if that
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matters), after installation to disk, anaconda would "crash" in kernel-core
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%posttrans, after calling kernel-install, because dracut would fail
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with
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> Could not determine the kernel command line parameters.
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> Please specify the kernel command line in /etc/kernel/cmdline!
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I guess it's legitimate, even if unusual, to have no cmdline parameters.
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Two changes are done in this patch:
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1. do not fail if the cmdline is empty.
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2. if /usr/lib/kernel/cmdline or /etc/kernel/cmdline are present, but
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   empty, ignore /proc/cmdline. If there's explicit configuration to
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   have empty cmdline, don't ignore it.
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The same change was done in dracut:
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https://github.com/dracutdevs/dracut/pull/561.
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(cherry picked from commit 88e1306af6380794842fb31108ba67895799fab4)
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Resolves: #1701454
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---
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 src/kernel-install/90-loaderentry.install | 14 ++++----------
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 1 file changed, 4 insertions(+), 10 deletions(-)
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diff --git a/src/kernel-install/90-loaderentry.install b/src/kernel-install/90-loaderentry.install
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index a271cdb8a0..1619301536 100644
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--- a/src/kernel-install/90-loaderentry.install
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+++ b/src/kernel-install/90-loaderentry.install
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@@ -43,13 +43,13 @@ if ! [[ $PRETTY_NAME ]]; then
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     PRETTY_NAME="Linux $KERNEL_VERSION"
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 fi
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-declare -a BOOT_OPTIONS
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-
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 if [[ -f /etc/kernel/cmdline ]]; then
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     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
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-fi
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+elif [[ -f /usr/lib/kernel/cmdline ]]; then
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+    read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
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+else
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+    declare -a BOOT_OPTIONS
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-if ! [[ ${BOOT_OPTIONS[*]} ]]; then
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     read -r -d '' -a line < /proc/cmdline
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     for i in "${line[@]}"; do
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         [[ "${i#initrd=*}" != "$i" ]] && continue
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@@ -57,12 +57,6 @@ if ! [[ ${BOOT_OPTIONS[*]} ]]; then
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     done
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 fi
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-if ! [[ ${BOOT_OPTIONS[*]} ]]; then
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-    echo "Could not determine the kernel command line parameters." >&2
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-    echo "Please specify the kernel command line in /etc/kernel/cmdline!" >&2
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-    exit 1
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-fi
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-
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 cp "$KERNEL_IMAGE" "$BOOT_DIR_ABS/linux" &&
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    chown root:root "$BOOT_DIR_ABS/linux" &&
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    chmod 0644 "$BOOT_DIR_ABS/linux" || {