.

t/qemu-runlinux

 #!/bin/sh -e
-# qemu-runlinux <kernel> <program> ...
+# qemu-runlinux [options] <kernel> <program> ...
 # run kernel in QEMU with root fs taken from host
 #
 # Useful to test/debug just compiled kernel via running programs
@@ -7,7 +7,6 @@
 
 # pid=1: we are running inside booted kernel as init.
 # mount /sys /proc etc and tail to the program.
-
 qshutdown() {
 	echo 1 >/proc/sys/kernel/sysrq
 	echo o >/proc/sysrq-trigger	# shutdown
@@ -58,12 +57,33 @@ if [ $$ == 1 ]; then
 	qdie "unreachable"
 fi
 
+
+# ----------------------------------------
+
+die() {
+	echo "$*" 1>&2
+	exit 1
+}
+
+nographic=y
+
+while test $# != 0
+do
+	case "$1" in
+	-g)
+		nographic=;;
+	*)
+		break;;
+	esac
+	shift
+done
+
 kernel=$1
-arch=`uname -m`
-test -z "$kernel" && kernel=arch/$arch/boot/bzImage
+test -n "$kernel" || die "kernel not specified"
 
 shift
 prog="$@"
+test -n "$prog" || die "program not specified"
 
 dir=`pwd`
 
@@ -85,9 +105,10 @@ dir=`pwd`
 # References
 #   http://unix.stackexchange.com/questions/90423/can-virtfs-9p-be-used-as-root-file-system
 #   http://stackoverflow.com/questions/11408041/kernel-debugging-with-gdb-and-qemu
+arch=`uname -m`
 qemu-system-$arch   \
     -enable-kvm \
-    -nographic	\
+    ${nographic:+-nographic}	\
  \
     -m 512M `# default 128M is too limiting` \
  \
@@ -96,7 +117,7 @@ qemu-system-$arch   \
  \
     -kernel $kernel \
     -append "ro rootfstype=9p rootflags=trans=virtio \
-console=ttyS0 init="$(realpath $0)" \
+${nographic:+console=ttyS0} init="$(realpath $0)" \
 CWD="$dir" HOME="$HOME" LANG="$LANG" TERM="$TERM" PATH="$PATH" \
 -- $prog \
 "