/usr/share/initramfs-tools/scripts/init-bottom/copymods is in cloud-initramfs-copymods 0.27ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | #!/bin/sh
# Copyright, 2014 Scott Moser <smoser@ubuntu.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see
# <http://www.gnu.org/licenses/>.
prereqs() {
local o="/scripts/init-bottom/overlayroot" p=""
# basically we run after overlayroot but do not depend on it
for p in "$DESTDIR/" ""; do
[ -e "$p$o" ] && echo "overlayroot" && return 0
done
}
[ "$1" != "prereqs" ] || { prereqs; exit; }
. /scripts/functions
set -f
PATH=/usr/sbin:/usr/bin:/sbin:/bin
cmdline=""
myopts=""
if [ -f /proc/cmdline ]; then
read cmdline < /proc/cmdline
for tok in cmdline; do
[ "${tok#copymods=}" != "$tok" ] || continue
myopts="${tok#copymods=}"
done
fi
myver=$(uname -r)
if [ ! -d "/lib/modules/$myver" ]; then
log_warning_msg "Something odd, no /lib/modules/$myver in initramfs."
exit 0
fi
[ -d "$rootmnt/lib/modules" ] || mkdir -p "$rootmnt/lib/modules" ||
{ log_warning_msg "No /lib/modules in target. cannot help."; exit 0; }
if [ -d "$rootmnt/lib/modules/$myver" ]; then
if [ "${myopts#*force}" = "$myopts" ]; then
exit 0
else
log_warning_msg "copying over existing modules! due to copymods=force"
fi
fi
mount -t tmpfs copymods "$rootmnt/lib/modules" ||
{ log_failure_msg "failed mount of tmpfs"; exit 0; }
mv "/lib/modules/$myver" "$rootmnt/lib/modules" ||
{ log_failure_msg "failed to copy modules to target root"; exit 0; }
ln -s "$rootmnt/lib/modules" "/lib/modules/$myver" ||
{ log_failure_msg "failed to link to modules"; exit 0; }
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