replace osi-run with osi-shell

1 files changed, 75 insertions, 0 deletions

diff --git a/osi-shell b/osi-shell
new file mode 100755
index 0000000..1230f19
--- /dev/null
+++ b/osi-shell
@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# 2018 Luke Shumaker
+declare -r NAME=osi-run
+declare -r VERSION=20180814
+
+set -euE
+source "${BASH_SOURCE[0]%/*}/lib/osi.sh"
+
+main() {
+	local arg_mode=main
+	local args
+	if ! args="$(getopt -n "${0##*/}" -o hV -l help,version -- "$@")"; then
+		arg_mode=error
+	else
+		eval "set -- $args"
+		while true; do
+			case "$1" in
+				-V|--version) shift; arg_mode=version;;
+				-h|--help) shift; arg_mode=usage;;
+				--) shift; break;;
+				*) error 1 'Internal error.  The programmer writing this tool screwed up.';;
+			esac
+		done
+		case "$arg_mode" in
+			main)
+				if (( $# != 1 )); then
+					if (( $# == 0 )); then
+						error 0 "Expected 1 positional argument, got none"
+					else
+						error 0 "Expected 1 positional argument, got %d: %s" "$#" "${*@Q}"
+					fi
+					arg_mode=error
+				else
+					arg_image=$1
+				fi
+				;;
+		esac
+	fi
+	case "$arg_mode" in
+		error) print "Try '%q --help' for more information" "${0##*/}" >&2; return 2;;
+		version)
+			print "%s (notsystemd) %s" "$NAME" "$VERSION"
+			return 0
+			;;
+		usage)
+			print 'Usage: %s [OPTIONS] FILENAME.img [< SCRIPT.sh]' "${0##*/}"
+			print 'Operating System Image: Interactive Shell'
+			echo
+			print 'OPTIONS:'
+			print '  -h, --help     display this help'
+			print '  -V, --version  output version information'
+			return 0
+			;;
+		main)
+			tmp=$(mktemp -td -- "${0##*/}.XXXXXXXXXX")
+			trap "rm -rf -- ${tmp@Q}" EXIT
+
+			mkfifo -- "$tmp/sync"
+
+			qemu-system-x86_64 \
+			    -machine accel=kvm \
+			    -m 512 \
+			    -name "osi-shell $arg_image" \
+			    -drive media=disk,format=raw,if=virtio,file="$arg_image" \
+			    -serial stdio \
+			    -serial file:"$tmp/exit" \
+			    < <(cat <"$tmp/sync" >/dev/null; cat; while sleep 0.1; do printf '\x04'; done) \
+			    > >(read -N1 c; printf '%s' "$c"; :>"$tmp/sync"; exec cat)
+
+			return "$(sed 's/\r$//' <"$tmp/exit")"
+			;;
+	esac
+}
+
+main "$@"