/usr/lib/dracut/modules.d/99uefi-lib/uefi-lib.sh is in dracut-network 040+1-1.
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 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | #!/bin/bash
#
# Copyright 2013 Red Hat, Inc. All rights reserved.
# Copyright 2013 Harald Hoyer <harald@redhat.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 2 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/>.
#
getbyte () {
local IFS= LC_CTYPE=C res c
read -r -n 1 -d '' c
res=$?
# the single quote in the argument of the printf
# yields the numeric value of $c (ASCII since LC_CTYPE=C)
[[ -n $c ]] && c=$(printf '%u' "'$c") || c=0
printf "$c"
return $res
}
getword () {
local b1 b2 val
b1=$(getbyte) || return 1
b2=$(getbyte) || return 1
(( val = b2 * 256 + b1 ))
echo $val
return 0
}
# Acpi(PNP0A08,0x0)/Pci(0x3,0x0)/Pci(0x0,0x0)/MAC(90E2BA265ED4,0x0)/Vlan(172)/Fibre(0x4EA06104A0CC0050,0x0)
uefi_device_path()
{
local IFS= LC_CTYPE=C res tt len type hextype first
first=1
while :; do
type=$(getbyte) || return 1
subtype=$(getbyte) || return 1
len=$(getword) || return 1
hextype=$(printf "%02x%02x" "$type" "$subtype")
if [[ $first == 1 ]]; then
first=0
elif [[ $hextype != "7fff" ]]; then
printf "/"
fi
case $hextype in
0101)
# PCI
tt=$(getword)
printf "PCI(0x%x,0x%x)" $(($tt / 256)) $(($tt & 255))
;;
0201)
# ACPI
printf "Acpi(0x%x,0x%x)" $(($(getword) + $(getword) * 65536)) $(($(getword) + $(getword) * 65536))
;;
0303)
# FIBRE
getword &>/dev/null
getword &>/dev/null
printf "Fibre(0x%x%x%x%x%x%x%x%x,0x%x)" \
$(getbyte) $(getbyte) $(getbyte) $(getbyte) \
$(getbyte) $(getbyte) $(getbyte) $(getbyte) \
$(( $(getword) + $(getword) * 65536 + 4294967296 * ( $(getword) + $(getword) * 65536 ) ))
;;
030b)
# MAC
printf "MAC(%02x%02x%02x%02x%02x%02x," $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
read -r -N 26 tt || return 1
printf "0x%x)" $(getbyte)
;;
0314)
# VLAN
printf "VLAN(%d)" $(getword)
;;
7fff)
# END
printf "\n"
return 0
;;
*)
printf "Unknown(Type:%d SubType:%d len=%d)" "$type" "$subtype" "$len"
read -r -N $(($len-4)) tt || return 1
;;
esac
done
}
get_fcoe_boot_mac()
{
data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
[ -f $data ] || return 1
local IFS= LC_CTYPE=C tt len type hextype
first=1
while :; do
type=$(getbyte) || return 1
subtype=$(getbyte) || return 1
len=$(getword) || return 1
hextype=$(printf "%02x%02x" "$type" "$subtype")
case $hextype in
030b)
# MAC
printf "%02x:%02x:%02x:%02x:%02x:%02x" $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte) $(getbyte)
read -r -N 27 tt || return 1
;;
7fff)
# END
return 0
;;
*)
read -r -N $(($len-4)) tt || return 1
;;
esac
done < $data
}
get_fcoe_boot_vlan()
{
data=${1:-/sys/firmware/efi/vars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac/data}
[ -f $data ] || return 1
local IFS= LC_CTYPE=C tt len type hextype
first=1
while :; do
type=$(getbyte) || return 1
subtype=$(getbyte) || return 1
len=$(getword) || return 1
hextype=$(printf "%02x%02x" "$type" "$subtype")
case $hextype in
0314)
# VLAN
printf "%d" $(getword)
;;
7fff)
# END
return 0
;;
*)
read -r -N $(($len-4)) tt || return 1
;;
esac
done < $data
}
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