1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
expect()
{
echo expect "$@"
}
expect '<^J^J^J>'
recho $'\n\n\n'
expect '<++^J++>'
f=$'\n'
recho "++$f++"
unset f
z1=$''
expect '<>'
recho "$z1"
ZIFS=$'\n'$'\t'$' '
expect '<^J^I >'
recho "$ZIFS"
expect '<abc>'
recho $'abc'
expect '<^M^[^Gabc>'
recho $'\r\e\aabc'
D=$"hello"," "$"world"
expect '<hello,> <world>'
recho $D
expect '<hello, world>'
recho "$D"
D=$""
expect '<>'
recho "$D"
world=chet
expect '<$hello, world>'
recho \$"hello, world"
expect '<hello, $world>'
recho $"hello, \$world"
expect '<hello, "world">'
recho $"hello, \"world\""
expect '<hello, $"world">'
recho $"hello"', $"world"'
expect '<hello, $"world">'
recho $'hello, $"world"'
expect '<$hello, chet>'
recho \$"hello, $world"
expect '<hello, chet>'
recho $"hello, $world"
z=$'\v\f\a\b'
case "$z" in
$'\v\f\a\b') echo ok;;
*) echo bad;;
esac
# Dave Korn says this should be allowed and echo 'abcd'
echo $'\'abcd\''
# printf translates \' to ' ...
printf "\'abcd\'\n"
# but echo -e doesn't
echo -e "\'abcd\'"
echo -e "\\'abcd\\'"
# and what do we do about unrecognized escape sequences?
shopt -s xpg_echo
recho $'A\CB'
recho "A\CB"
cde=c
recho $'ab$cde'
printf "%b\n" 'A\CB'
printf 'A\CB\n'
echo 'A\CB'
world=chet
recho $'hello, $"world"'
recho $'hello, \$"world"'
recho $'hello, $\"world"'
recho "hello, $"world""
|