1	# spec/nul-bytes
2
3	#### NUL bytes with echo -e
4	case $SH in (dash) exit ;; esac
5
6	echo -e '\0'
7	## stdout-repr: "\x00\n"
8	## N-I dash stdout-json: ""
9
10	#### NUL bytes in printf format
11	printf '\0\n'
12	## stdout-repr: "\x00\n"
13
14	#### NUL bytes in printf value (OSH and zsh agree)
15	case $SH in (dash) exit ;; esac
16
17	nul=$'\0'
18	echo "$nul"
19	printf '%s\n' "$nul"
20
21	## stdout-repr: "\n\n"
22	## OK osh/zsh stdout-repr: "\x00\n\x00\n"
23	## N-I dash stdout-json: ""
24
25
26
27	#### NUL bytes with echo $'\0' (OSH and zsh agree)
28
29	case $SH in (dash) exit ;; esac
30
31	# OSH agrees with ZSH -- so you have the ability to print NUL bytes without
32	# legacy echo -e
33
34	echo $'\0'
35
36	## stdout-repr: "\n"
37	## OK osh/zsh stdout-repr: "\0\n"
38	## N-I dash stdout-json: ""
39
40
41	#### NUL bytes and IFS splitting
42	case $SH in (dash) exit ;; esac
43
44	argv.py $(echo -e '\0')
45	argv.py "$(echo -e '\0')"
46	argv.py $(echo -e 'a\0b')
47	argv.py "$(echo -e 'a\0b')"
48
49	## STDOUT:
50	[]
51	['']
52	['ab']
53	['ab']
54	## END
55	## BUG zsh STDOUT:
56	['', '']
57	['']
58	['a', 'b']
59	['a']
60	## END
61
62	## N-I dash STDOUT:
63	## END
64
65	#### NUL bytes with test -n
66
67	case $SH in (dash) exit ;; esac
68
69	# zsh is buggy here, weird
70	test -n $''
71	echo status=$?
72
73	test -n $'\0'
74	echo status=$?
75
76
77	## STDOUT:
78	status=1
79	status=1
80	## END
81	## OK osh STDOUT:
82	status=1
83	status=0
84	## END
85	## BUG zsh STDOUT:
86	status=0
87	status=0
88	## END
89
90	## N-I dash STDOUT:
91	## END
92
93
94	#### NUL bytes with test -f
95
96	case $SH in (dash) exit ;; esac
97
98
99	test -f $'\0'
100	echo status=$?
101
102	touch foo
103	test -f $'foo\0'
104	echo status=$?
105
106	test -f $'foo\0bar'
107	echo status=$?
108
109	test -f $'foobar'
110	echo status=$?
111
112
113	## STDOUT:
114	status=1
115	status=0
116	status=0
117	status=1
118	## END
119
120	## OK ash STDOUT:
121	status=1
122	status=0
123	status=1
124	status=1
125	## END
126
127	## N-I dash STDOUT:
128	## END
129
130
131	#### NUL bytes with ${#s} (OSH and zsh agree)
132
133	case $SH in (dash) exit ;; esac
134
135	empty=$''
136	nul=$'\0'
137
138	echo empty=${#empty}
139	echo nul=${#nul}
140
141
142	## STDOUT:
143	empty=0
144	nul=0
145	## END
146
147	## OK osh/zsh STDOUT:
148	empty=0
149	nul=1
150	## END
151
152	## N-I dash STDOUT:
153	## END