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Current Path : /lib/dracut/modules.d/99uefi-lib/ |
Current File : //lib/dracut/modules.d/99uefi-lib/uefi-lib.sh |
#!/usr/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=0 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' "'$c") || c=0 printf "%s" "$c" return $res } getword() { local b1=0 b2=0 val=0 b1=$(getbyte) b2=$(getbyte) ((val = b2 * 256 + b1)) echo "$val" return 0 } # E.g. Acpi(PNP0A08,0x0)/Pci(0x3,0x0)/Pci(0x0,0x0)/MAC(90E2BA265ED4,0x0)/Vlan(172)/Fibre(0x4EA06104A0CC0050,0x0) uefi_device_path() { data=${1:-/sys/firmware/efi/efivars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac} [ -f "$data" ] || return 1 local IFS= LC_CTYPE=C res tt len type hextype first first=1 { getword > /dev/null getword > /dev/null 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)" "$(getbyte)" for ((i = 0; i < 26; i++)); do tt=$(getbyte) || return 1; done printf "0x%x)" "$(getbyte)" ;; 0314) # VLAN printf "VLAN(%d)" "$(getword)" ;; 7fff) # END printf "\n" return 0 ;; *) #printf "Unknown(Type:0x%02x SubType:0x%02x len=%d)\n" "$type" "$subtype" "$len" >&2 for ((i = 0; i < len - 4; i++)); do tt=$(getbyte); done ;; esac done } < "$data" } get_fcoe_boot_mac() { data=${1:-/sys/firmware/efi/efivars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac} [ -f "$data" ] || return 1 local IFS= LC_CTYPE=C tt len type hextype { getword > /dev/null getword > /dev/null while :; do type=$(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)" "$(getbyte)" for ((i = 0; i < 27; i++)); do tt=$(getbyte) || return 1; done ;; 7fff) # END return 0 ;; *) #printf "Unknown(Type:0x%02x SubType:0x%02x len=%d)\n" "$type" "$subtype" "$len" >&2 for ((i = 0; i < len - 4; i++)); do tt=$(getbyte); done ;; esac done } < "$data" } get_fcoe_boot_vlan() { data=${1:-/sys/firmware/efi/efivars/FcoeBootDevice-a0ebca23-5f9c-447a-a268-22b6c158c2ac} [ -f "$data" ] || return 1 local IFS= LC_CTYPE=C tt len type hextype { getword > /dev/null getword > /dev/null while :; do type=$(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 ;; *) #printf "Unknown(Type:0x%02x SubType:0x%02x len=%d)\n" "$type" "$subtype" "$len" >&2 for ((i = 0; i < len; i++)); do tt=$(getbyte); done ;; esac done } < "$data" }