blob: 512da351ba8e72be4df2405a8e8229685fe4e90c (
plain)
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
|
# first try some invalid patterns
# do all of these in subshells since it's supposed to error out
# (set argv0 to "SHELL" to avoid "/path/to/shell: blah" in error messages)
export var=0123456789
"$THIS_SH" -c 'echo ${:}' SHELL
"$THIS_SH" -c 'echo ${::}' SHELL
"$THIS_SH" -c 'echo ${:1}' SHELL
"$THIS_SH" -c 'echo ${::1}' SHELL
#this also is not valid in bash, hush accepts it:
"$THIS_SH" -c 'echo ${var:}' SHELL
# then some funky ones
"$THIS_SH" -c 'echo ${?:0}' SHELL
# now some valid ones
set --; echo "1 =|${1}|"
set --; echo "1:1 =|${1:1}|"
set --; echo "1:1:2=|${1:1:2}|"
set --; echo "1::2 =|${1::2}|"
set --; echo "1:1: =|${1:1:}|"
set --; echo "1:: =|${1::}|"
set -- 0123; echo "1 =|${1}|"
set -- 0123; echo "1:1 =|${1:1}|"
set -- 0123; echo "1:1:2=|${1:1:2}|"
set -- 0123; echo "1::2 =|${1::2}|"
set -- 0123; echo "1:1: =|${1:1:}|"
set -- 0123; echo "1:: =|${1::}|"
unset f; echo "f =|$f|"
unset f; echo "f:1 =|${f:1}|"
unset f; echo "f:1:2=|${f:1:2}|"
unset f; echo "f::2 =|${f::2}|"
unset f; echo "f:1: =|${f:1:}|"
unset f; echo "f:: =|${f::}|"
f=; echo "f =|$f|"
f=; echo "f:1 =|${f:1}|"
f=; echo "f:1:2=|${f:1:2}|"
f=; echo "f::2 =|${f::2}|"
f=; echo "f:1: =|${f:1:}|"
f=; echo "f:: =|${f::}|"
f=a; echo "f =|$f|"
f=a; echo "f:1 =|${f:1}|"
f=a; echo "f:1:2=|${f:1:2}|"
f=a; echo "f::2 =|${f::2}|"
f=a; echo "f:1: =|${f:1:}|"
f=a; echo "f:: =|${f::}|"
f=0123456789; echo "f =|$f|"
f=0123456789; echo "f:1 =|${f:1}|"
f=0123456789; echo "f:1:2=|${f:1:2}|"
f=0123456789; echo "f::2 =|${f::2}|"
f=0123456789; echo "f:1: =|${f:1:}|"
f=0123456789; echo "f:: =|${f::}|"
echo "Substrings from special vars"
echo '? '"=|$?|"
echo '?:1 '"=|${?:1}|"
echo '?:1:2'"=|${?:1:2}|"
echo '?::2 '"=|${?::2}|"
echo '?:1: '"=|${?:1:}|"
echo '?:: '"=|${?::}|"
set -- 1 2 3 4 5 6 7 8 9 10 11
echo '# '"=|$#|"
echo '#:1 '"=|${#:1}|"
echo '#:1:2'"=|${#:1:2}|"
echo '#::2 '"=|${#::2}|"
echo '#:1: '"=|${#:1:}|"
echo '#:: '"=|${#::}|"
echo "Substrings with expressions"
f=01234567; echo 'f '"=|$f|"
f=01234567; echo 'f:1+1:2+2 '"=|${f:1+1:2+2}|"
f=01234567; echo 'f:-1:2+2 '"=|${f:-1:2+2}|"
f=01234567; echo 'f:1:f '"=|${f:1:f}|"
f=01234567; echo 'f:1:$f '"=|${f:1:$f}|"
f=01234567; echo 'f:1:${f} '"=|${f:1:${f}}|"
f=01234567; echo 'f:1:${f:3:1} '"=|${f:1:${f:3:1}}|"
f=01234567; echo 'f:1:1`echo 1`'"=|${f:1:`echo 1`}|"
echo Done
|
