From 02354704729d38c3b078c696adc1bbbd33cbcf72 Mon Sep 17 00:00:00 2001
From: "Alexander G. M. Smith" <agmsmith@ncf.ca>
Date: Tue, 21 Sep 2021 15:40:33 -0400
Subject: [PATCH] 3rdparty/os_probe: Original 83haiku GRUB auto detect Haiku.

Original version of 83haiku as seen in Debian Linux, for detecting
pre-package based Haiku OS and automatically setting up a GRUB
boot menu item for bootable Haiku partitions.

Change-Id: I0d1fe4c9b395e7912b2398ab6bac5c25d92aa64a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4495
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Alexander G. M. Smith <agmsmith@ncf.ca>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
---
 3rdparty/os_probe/83haiku   | 35 +++++++++++++++++++++++++++++++++++
 3rdparty/os_probe/README.md | 30 ++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100755 3rdparty/os_probe/83haiku
 create mode 100644 3rdparty/os_probe/README.md

diff --git a/3rdparty/os_probe/83haiku b/3rdparty/os_probe/83haiku
new file mode 100755
index 0000000000..1fcd4b8535
--- /dev/null
+++ b/3rdparty/os_probe/83haiku
@@ -0,0 +1,35 @@
+#!/usr/bin/sh
+# Detects Haiku on BeFS partitions.
+
+. /usr/share/os-prober/common.sh
+
+partition="$1"
+mpoint="$2"
+type="$3"
+
+# Weed out stuff that doesn't apply to us
+case "$type" in
+	befs|befs_be) debug "$partition is a BeFS partition" ;;
+	*) debug "$partition is not a BeFS partition: exiting"; exit 1 ;;
+esac
+
+if head -c 512 "$partition" | grep -aqs "system.haiku_loader"; then
+	debug "Stage 1 bootloader found"
+else
+	debug "Stage 1 bootloader not found: exiting"
+	exit 1
+fi
+
+if system="$(item_in_dir "system" "$mpoint")" &&
+	item_in_dir -q "haiku_loader" "$mpoint/$system" &&
+	(item_in_dir -q "kernel_x86" "$mpoint/$system" ||
+		item_in_dir -q "kernel_x86_64" "$mpoint/$system")
+then
+	debug "Stage 2 bootloader and kernel found"
+	label="$(count_next_label Haiku)"
+	result "$partition:Haiku:$label:chain"
+	exit 0
+else
+	debug "Stage 2 bootloader and kernel not found: exiting"
+	exit 1
+fi
diff --git a/3rdparty/os_probe/README.md b/3rdparty/os_probe/README.md
new file mode 100644
index 0000000000..cc4804815d
--- /dev/null
+++ b/3rdparty/os_probe/README.md
@@ -0,0 +1,30 @@
+# os-probe for the Haiku Computer Operating System
+
+This is the Linux "os-probes" file to detect Haiku OS and to automatically add
+it to the GRUB boot menu.
+
+First make sure the Haiku volumes you want to boot are mounted in Linux
+(otherwise nothing gets detected).  Then copy the 83haiku file to your Linux
+system in the os-probes subdirectory, usually (in Fedora at least) it will be
+/usr/libexec/os-probes/mounted/83haiku  You can find older 83haiku versions in
+the repository history, though the latest should be able to detect older
+(pre-package manager) Haiku too.
+
+Then regenerate the GRUB boot configuration file.  This will happen
+automatically the next time your kernel is updated.  To do it manually,
+for old school MBR BIOS boot computers, the command is
+`grub2-mkconfig --output /boot/grub2/grub.cfg`
+
+Computers using the newer UEFI boot system have a EFI/HAIKU/BOOTX64.EFI file
+that you manually install to your EFI partition, and booting is done
+differently, so you don't need this 83Haiku file for them.  See
+[UEFI Booting Haiku](https://www.haiku-os.org/guides/uefi_booting/) instead.
+
+The original seems to have come from Debian and was written by François Revol.
+It's in the
+[Debian os-prober package](https://packages.debian.org/search?keywords=os-prober).
+There's also a big discussion about updating it in
+[Debian Bug Report #732696](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732696).
+
+_AGMS20210921_
+