busybox-1.19.3/shell/hush_test/hush-misc/empty_args.tests - nest-learning-thermostat/5.0.2/busybox - Git at Google

 echo Null 0th arg:
 ""
 echo $?
 echo Null 1st arg:
 # printf without args would print usage info
 printf ""
 echo $?
 echo Null arg in exec:
 exec printf ""
	echo Null 0th arg:
	""
	echo $?
	echo Null 1st arg:
	# printf without args would print usage info
	printf ""
	echo $?
	echo Null arg in exec:
	exec printf ""