From b905e61ae0dae0dec58fa9657d4e1514566b143f Mon Sep 17 00:00:00 2001
From: Mitchell Riedstra <mitch@riedstra.dev>
Date: Mon, 12 Jan 2026 20:22:17 -0500
Subject: Reduce the size of the Linux system. Add a better readme.

---
 build.sh | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

(limited to 'build.sh')

diff --git a/build.sh b/build.sh
index 285a76b..8ee46a5 100755
--- a/build.sh
+++ b/build.sh
@@ -6,6 +6,14 @@ sudo=sudo
 docker=docker
 [ -n "$(command -v podman)" ] && [ -x "$(command -v podman)" ] && docker=podman
 
+bin_only=false
+no_plat=false
+while [ $# -gt 0 ] ; do case $1 in
+	-bin-only) bin_only=true ; shift ;;
+	-no-platform) no_plat=true ; shift ;;
+	*) echo "bad arg: '$1'" ; exit 2 ;;
+esac ; done
+
 simh_url="https://github.com/simh/simh/archive/master.zip"
 simh_archive="./simh.zip"
 if ! [ -e "$simh_archive" ] ; then
@@ -16,12 +24,12 @@ $docker build --platform=i386 -t unixv4 .
 $docker run --name unixv4emulator --entrypoint=/bin/true --replace unixv4
 $docker export unixv4emulator > img.tar
 $docker container rm unixv4emulator
-truncate -s 50M disk.img
+tar --strip-components 2 -xf img.tar usr/bin/pdp11
+$bin_only && exit 0
+truncate -s 12M disk.img
 $sudo kpartx -av disk.img
 $sudo mkfs.ext2 /dev/loop0
 $sudo mount /dev/loop0 /mnt
 $sudo tar -C /mnt -xpvf img.tar
 $sudo umount /mnt
 $sudo kpartx -dv disk.img
-
-
-- 
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