90-loaderentry.install: fixup BOOT_OPTIONS better use "read -r -d '' -a" to read in the array. It handles multiple lines and missing newline at the EOF.

kernel-install/90-loaderentry.install: fix cmdline parsing A recent commit (2f3a215) changed the parsing of /proc/cmdline to use a shell array. Unfortunately, this introduced a bug: "read -ar line" populates the shell variable $r, not $line. This breaks installation of new loader entries: # kernel-install add 3.17.1-304.fc21.x86_64 \ /boot/vmlinuz-3.17.1-304.fc21.x86_64 Could not determine the kernel command line parameters. Please specify the kernel command line in /etc/kernel/cmdline! This commit alters the read command to correctly populate the $line array instead.

kernel-install/90-loaderentry.install: fixed cmdline parsing If /etc/kernel/cmdline is missing or empty, we read /proc/cmdline and want to filter out the initrd line. Due to a bug, the whole contents was filtered out.

os-release: define /usr/lib/os-release as fallback for /etc/os-release The file should have been in /usr/lib/ in the first place, since it describes the OS container in /usr (and not the configuration in /etc), hence, let's support os-release files in /usr/lib as fallback if no version in /etc exists, following the usual override logic. A prior commit already enabled tmpfiles to create /etc/os-release as a symlink to /usr/lib/os-release should it be missing, thus providing nice compatibility with applications only checking in /etc. While it's probably a good idea if all apps check both locations via a fallback logic, it is only necessary in the early boot process, as long as the /etc/os-release symlink has not been restored, in case we boot with an empty /etc.

kernel-install: avoid using 'cp --preserve' Force 0644 and root:root instead, to avoid problems with fat filesystems.

kernel-install/90-loaderentry.install: do not fail for missing initrd

kernel-install: filter out "initrd=" from /proc/cmdline

kernel-install: add default install scripts Do the depmod in the kernel-install hooks, so hooks can produce/install kernel modules and be part of the depmod. Also move the basic boot loader entry creation and removal to a plugin script. If PRETTY_NAME is not defined in /etc/os-release, fallback to PRETTY_NAME="Linux $KERNEL_VERSION". Add documentation for everything in the man page.