From d8ecf0178d4e3e48a8fd2bfade6a550b3be63959 Mon Sep 17 00:00:00 2001
From: Harmen Stoppels <harmenstoppels@gmail.com>
Date: Tue, 21 Jun 2022 21:52:27 +0200
Subject: [PATCH] add make install-suid target

---
 Makefile  |  7 +++++--
 README.md | 15 ++++++++++++---
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 47174b3..2db8be6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: install clean
+.PHONY: install install-suid clean
 
 prefix = /usr/local
 exec_prefix = $(prefix)
@@ -17,10 +17,13 @@ all: squashfs-mount
 squashfs-mount: squashfs-mount.o
 	$(CC) $< $(LDFLAGS) $(SQUASHFS_MOUNT_LDFLAGS) -o $@
 
-
 install: squashfs-mount
 	mkdir -p $(DESTDIR)$(bindir)
 	cp -p squashfs-mount $(DESTDIR)$(bindir)
 
+install-suid: install
+	chown root:root $(DESTDIR)$(bindir)/squashfs-mount
+	chmod u+s $(DESTDIR)$(bindir)/squashfs-mount
+
 clean:
 	rm -f squashfs-mount squashfs-mount.o
diff --git a/README.md b/README.md
index f568fe9..9a480d4 100644
--- a/README.md
+++ b/README.md
@@ -97,9 +97,18 @@ issues:
 
 ## Install instructions
 
+Build and install without privileges and make it a root-owned setuid binary by hand:
+
 ```console
 make
-sudo chown root:root squashfs-mount
-sudo chmod +s squashfs-mount
-make install
+make install prefix=./install
+sudo chown root:root ./install/bin/squashfs-mount
+sudo chmod u+s ./install/bin/squashfs-mount
+```
+
+Or use the `install-suid` target:
+
+```
+make install prefix=./install
+sudo make install-suid prefix=./install
 ```