/usr/lib/os-probes/mounted/20microsoft is in os-prober 1.65+deb8u1.
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 | #!/bin/sh
# Detects all Microsoft OSes on a collection of partitions.
. /usr/share/os-prober/common.sh
partition="$1"
mpoint="$2"
type="$3"
# This script looks for legacy BIOS bootloaders only. Skip if running UEFI
if [ -d /sys/firmware/efi ] && [ ! -f /var/lib/partman/ignore_uefi ]; then
debug "Skipping legacy bootloaders on UEFI system"
exit 1
fi
# Weed out stuff that doesn't apply to us
case "$type" in
ntfs|ntfs-3g) debug "$1 is a NTFS partition" ;;
vfat) debug "$1 is a FAT32 partition" ;;
msdos) debug "$1 is a FAT16 partition" ;;
fat) debug "$1 is a FAT partition (mounted by GRUB)" ;;
fuse|fuseblk) debug "$1 is a FUSE partition" ;; # might be ntfs-3g
*) debug "$1 is not a MS partition: exiting"; exit 1 ;;
esac
found=
# Vista (previously Longhorn)
if item_in_dir -q bootmgr "$2"; then
# there might be different boot directories in different case as:
# boot Boot BOOT
for boot in $(item_in_dir boot "$2"); do
bcd=$(item_in_dir bcd "$2/$boot")
if [ -n "$bcd" ]; then
if grep -aqs "W.i.n.d.o.w.s. .1.0" "$2/$boot/$bcd"; then
long="Windows 10 (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .8" "$2/$boot/$bcd"; then
long="Windows 8 (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .7" "$2/$boot/$bcd"; then
long="Windows 7 (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .V.i.s.t.a" "$2/$boot/$bcd"; then
long="Windows Vista (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .S.e.r.v.e.r. .2.0.0.8. .R.2." "$2/$boot/$bcd"; then
long="Windows Server 2008 R2 (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .S.e.r.v.e.r. .2.0.0.8." "$2/$boot/$bcd"; then
long="Windows Server 2008 (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .R.e.c.o.v.e.r.y. .E.n.v.i.r.o.n.m.e.n.t" "$2/$boot/$bcd"; then
long="Windows Recovery Environment (loader)"
elif grep -aqs "W.i.n.d.o.w.s. .S.e.t.u.p" "$2/$boot/$bcd"; then
long="Windows Recovery Environment (loader)"
else
long="Windows Vista (loader)"
fi
short=Windows
found=true
break
fi
done
fi
# 2000/XP/NT4.0
if [ -z "$found" ] && item_in_dir -q ntldr "$2" && item_in_dir -q ntdetect.com "$2"; then
long="Windows NT/2000/XP"
short=Windows
ini=$(item_in_dir boot.ini "$2")
if [ -n "$ini" ]; then
multicount="$(grep -e "^multi" "$2/$ini" | wc -l)"
scsicount="$(grep -e "^scsi" "$2/$ini" | wc -l)"
msoscount="$(expr "${multicount}" + "${scsicount}")"
if [ "$msoscount" -eq 1 ]; then
# We need to remove a Carriage Return at the end of
# the line...
defaultmspart="$(grep -e "^default=" "$2/$ini" | cut -d '=' -f2 | tr -d '\r')"
# Escape any backslashes in defaultmspart
grepexp="^$(echo "$defaultmspart" | sed -e 's/\\/\\\\/')="
# Colons not allowed; replace by spaces
# Accented characters (non UTF-8) cause debconf to
# hang, so we fall back to the default if the name
# contains any weird characters.
long="$(grep -e "$grepexp" "$2/$ini" | cut -d '"' -f2 | \
tr ':' ' ' | LC_ALL=C grep -v '[^a-zA-Z0-9 &()/_-]')"
if [ -z "$long" ]; then
long="Windows NT/2000/XP"
fi
else
long="Windows NT/2000/XP (loader)"
fi
found=true
fi
fi
# MS-DOS
if [ -z "$found" ] && item_in_dir -q dos "$2"; then
long="MS-DOS 5.x/6.x/Win3.1"
short=MS-DOS
found=true
fi
# 95/98/Me
if [ -z "$found" ] && item_in_dir -q windows "$2" &&
item_in_dir -q win.com "$2"/"$(item_in_dir windows "$2")"; then
long="Windows 95/98/Me"
short=Windows9xMe
found=true
fi
if [ -z "$found" ]; then
exit 1
fi
label="$(count_next_label "$short")"
result "${partition}:${long}:${label}:chain"
exit 0
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