1	#!/bin/bash
2
3	### command -v
4	myfunc() { echo x; }
5	command -v echo
6	echo $?
7	command -v myfunc
8	echo $?
9	command -v nonexistent # doesn't print anything?
10	echo $?
11	command -v for
12	echo $?
13	# stdout-json: "echo\n0\nmyfunc\n0\n1\nfor\n0\n"
14	# OK dash stdout-json: "echo\n0\nmyfunc\n0\n127\nfor\n0\n"
15
16	### command -v with multiple names
17	# bash chooses to swallow the error! We agree with zsh if ANY word lookup
18	# fails, then the whole thing fails.
19	# All four shells behave differently here!
20	myfunc() { echo x; }
21	command -v echo myfunc ZZZ for
22	echo status=$?
23	# stdout-json: "echo\nmyfunc\nfor\nstatus=1\n"
24	# BUG bash stdout-json: "echo\nmyfunc\nfor\nstatus=0\n"
25	# BUG dash stdout-json: "echo\nstatus=0\n"
26	# OK mksh stdout-json: "echo\nmyfunc\nstatus=1\n"
27
28	### dirs builtin
29	cd /
30	dirs
31	# stdout-json: "/\n"
32	# status: 0
33	# N-I dash/mksh status: 127
34	# N-I dash/mksh stdout-json: ""
35
36	### dirs -c to clear the stack
37	cd /
38	pushd /tmp >/dev/null # zsh pushd doesn't print anything, but bash does
39	dirs
40	dirs -c
41	dirs
42	# stdout-json: "/tmp /\n/tmp\n"
43	# status: 0
44	# N-I dash/mksh status: 127
45	# N-I dash/mksh stdout-json: ""
46
47	### dirs -v to print numbered stack, one entry per line
48	cd /
49	pushd /tmp >/dev/null
50	dirs -v
51	pushd /lib >/dev/null
52	dirs -v
53	# stdout-json: " 0 /tmp\n 1 /\n 0 /lib\n 1 /tmp\n 2 /\n"
54	# status: 0
55	# zsh uses tabs
56	# OK zsh stdout-json: "0\t/tmp\n1\t/\n0\t/lib\n1\t/tmp\n2\t/\n"
57	# N-I dash/mksh status: 127
58	# N-I dash/mksh stdout-json: ""
59
60	### dirs -p to print one entry per line
61	cd /
62	pushd /tmp >/dev/null
63	dirs -p
64	pushd /lib >/dev/null
65	dirs -p
66	# stdout-json: "/tmp\n/\n/lib\n/tmp\n/\n"
67	# N-I dash/mksh status: 127
68	# N-I dash/mksh stdout-json: ""