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681aaee461
- Drop check for kernel >= 2.6.32, which released in 2009.
- Drop restarting of some daemons due to the devtmpfs migration, which
happened before the above kernel even.
- Drop support for forcing upgrades on kernels known not to work via
/etc/udev/kernel-upgrade. Don't pretend that this would help, as users
could end up with a non-bootable system. Always fail early in preinst
when it's still possible to install a working kernel.
- Drop postinst test for "running in containers" -- it's actually possible
to run udev in containers if you mount /sys r/w and you know what you
are doing. Also, the init.d script and systemd service do that check
again.
- Keep the kernel feature and chroot checks, as these are still useful.
Simplify check_kernel_features() by eliminating some variables.
- Drop debconf templates. Two of them are obsolete, and having
CONFIG_SYSFS_DEPRECATED is now so implausible that this doesn't warrant
the overhead and translator efforts.
82 lines
2.0 KiB
Bash
82 lines
2.0 KiB
Bash
#!/bin/sh -e
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# adapted from postinst
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chrooted() {
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if [ "$(stat -c %d/%i /)" = "$(stat -Lc %d/%i /proc/1/root 2>/dev/null)" ];
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then
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return 1
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fi
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return 0
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}
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check_kernel_features() {
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# skip the check if udev is not already active
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[ -d /run/udev/ ] || return 0
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if [ -e /proc/kallsyms ]; then
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local needed_symbols='inotify_init signalfd accept4 open_by_handle_at timerfd_create epoll_create'
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for symbol in $needed_symbols; do
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if ! egrep -q "^[a-fA-F0-9]+ T \.?sys_${symbol}$" /proc/kallsyms; then
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cat <<END
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Since release 198, udev requires support for the following features in
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the running kernel:
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- inotify(2) (CONFIG_INOTIFY_USER)
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- signalfd(2) (CONFIG_SIGNALFD)
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- accept4(2)
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- open_by_handle_at(2) (CONFIG_FHANDLE)
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- timerfd_create(2) (CONFIG_TIMERFD)
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- epoll_create(2) (CONFIG_EPOLL)
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END
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exit 1
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fi
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done
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fi
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if ! grep -q '[[:space:]]devtmpfs$' /proc/filesystems; then
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cat <<END
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Since release 176, udev requires support for the following features in
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the running kernel:
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- devtmpfs (CONFIG_DEVTMPFS)
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END
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exit 1
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fi
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if [ -d /sys/class/mem/null -a ! -L /sys/class/mem/null ] ||
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[ -e /sys/block -a ! -e /sys/class/block ]; then
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cat <<END
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The currently running kernel has the CONFIG_SYSFS_DEPRECATED option
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enabled, which is incompatible with udev.
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END
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exit 1
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fi
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}
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check_version() {
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# $2 is non-empty when installing from the "config-files" state
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[ -n "$2" ] || return 0
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if dpkg --compare-versions $2 lt 204-4; then
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# these must be checked first to allow aborting before changing anything
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if chrooted; then
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echo 'Running in a chroot, skipping the kernel versions checks!'
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else
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check_kernel_features
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# suppress errors when the new rules files contain options not supported by
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# the old daemon
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udevadm control --log-priority=0 || true
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fi
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fi # 204-4
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}
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case "$1" in
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install|upgrade|abort-upgrade)
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check_version "$@"
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;;
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esac
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#DEBHELPER#
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