feat(userspace): programs in /bin w/o .elf; bin manifests (needs = display) so shell runs snake; Ctrl+C kills foreground via terminal interrupt notification; ctrl keys; sleep

scripts/make-disk-image.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # Builds the k-os disk: one ext4 filesystem holding every program init may
-# start. Init and storage themselves are packed into the kernel image.
+# start, in /bin. Init and storage themselves are packed into the kernel image.
 set -euo pipefail
 
 IMG="${IMG:-boot.img}"
@@ -17,31 +17,33 @@ trap 'rm -rf "${ROOT}"' EXIT
 copy() {
     local src="$1" dst="$2"
     if [ -f "${BUILD_DIR}/${src}" ]; then
-        cp "${BUILD_DIR}/${src}" "${ROOT}/${dst}"
+        cp "${BUILD_DIR}/${src}" "${ROOT}/bin/${dst}"
     fi
 }
 
-copy echo               "echo.elf"
-copy snake              "snake.elf"
-copy display-qemu       "display.elf"
-copy input-qemu         "input.elf"
-copy log-server         "log.elf"
-copy permission-manager "permis.elf"
-copy session-server     "session.elf"
-copy terminal-server    "terminal.elf"
-copy shell              "shell.elf"
-copy cat                "cat.elf"
-copy ls                 "ls.elf"
-# Files that ship on the disk.
+mkdir -p "${ROOT}/bin"
+copy echo               echo
+copy snake              snake
+copy display-qemu       display
+copy input-qemu         input
+copy log-server         log
+copy permission-manager permission
+copy session-server     session
+copy terminal-server    terminal
+copy shell              shell
+copy cat                cat
+copy ls                 ls
+copy sleep              sleep
+# Files that ship on the disk, programs' manifests among them.
 cp -r disk/. "${ROOT}/"
 # Only the test image: its presence makes init run the self-test.
 if [ -n "${SMPTEST:-}" ]; then
-    copy smptest   "smptest.elf"
-    copy spawntest "spawntst.elf"
-    copy hello     "hello.elf"
+    copy smptest   smptest
+    copy spawntest spawntest
+    copy hello     hello
 fi
 
 rm -f "${IMG}"
 mkfs.ext4 -q -F -b 4096 -L k-os -O "${FEATURES}" -d "${ROOT}" "${IMG}" "${SIZE}"
 echo "=== ${IMG}: ext4, ${SIZE} ==="
-ls -1 "${ROOT}"
+ls -1 "${ROOT}" "${ROOT}/bin"