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uefi-lib.sh
#!/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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