| 1 |
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| 2 | # TODO: Need a SETUP section.
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| 3 |
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| 4 | #### SETUP
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| 5 | a=(1 '2 3')
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| 6 |
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| 7 | #### "${a[@]}" and "${a[*]}"
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| 8 | a=(1 '2 3')
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| 9 | argv.py "${a[@]}" "${a[*]}"
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| 10 | ## stdout: ['1', '2 3', '1 2 3']
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| 11 |
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| 12 | #### ${a[@]} and ${a[*]}
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| 13 | a=(1 '2 3')
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| 14 | argv.py ${a[@]} ${a[*]}
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| 15 | ## stdout: ['1', '2', '3', '1', '2', '3']
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| 16 |
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| 17 | #### 4 ways to interpolate empty array
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| 18 | argv.py 1 "${a[@]}" 2 ${a[@]} 3 "${a[*]}" 4 ${a[*]} 5
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| 19 | ## stdout: ['1', '2', '3', '', '4', '5']
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| 20 |
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| 21 | #### empty array
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| 22 | empty=()
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| 23 | argv.py "${empty[@]}"
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| 24 | ## stdout: []
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| 25 |
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| 26 | #### Empty array with :-
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| 27 | empty=()
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| 28 | argv.py ${empty[@]:-not one} "${empty[@]:-not one}"
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| 29 | ## stdout: ['not', 'one', 'not one']
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| 30 |
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| 31 | #### nounset with empty array (design bug, makes it hard to use arrays)
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| 32 | # http://lists.gnu.org/archive/html/help-bash/2017-09/msg00005.html
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| 33 | # NOTE: This used to be a bug in bash 4.3, but is fixed in bash 4.4.
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| 34 | set -o nounset
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| 35 | empty=()
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| 36 | argv.py "${empty[@]}"
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| 37 | echo status=$?
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| 38 | ## STDOUT:
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| 39 | []
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| 40 | status=0
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| 41 | ## END
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| 42 | ## BUG mksh stdout-json: ""
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| 43 | ## BUG mksh status: 1
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| 44 |
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| 45 | #### local array
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| 46 | # mksh support local variables, but not local arrays, oddly.
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| 47 | f() {
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| 48 | local a=(1 '2 3')
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| 49 | argv.py "${a[0]}"
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| 50 | }
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| 51 | f
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| 52 | ## stdout: ['1']
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| 53 | ## status: 0
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| 54 | ## BUG mksh status: 1
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| 55 | ## BUG mksh stdout-json: ""
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| 56 |
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| 57 | #### Command with with word splitting in array
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| 58 | array=('1 2' $(echo '3 4'))
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| 59 | argv.py "${array[@]}"
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| 60 | ## stdout: ['1 2', '3', '4']
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| 61 |
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| 62 | #### space before ( in array initialization
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| 63 | # NOTE: mksh accepts this, but bash doesn't
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| 64 | a= (1 '2 3')
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| 65 | echo $a
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| 66 | ## status: 2
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| 67 | ## OK mksh status: 0
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| 68 | ## OK mksh stdout: 1
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| 69 |
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| 70 | #### array over multiple lines
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| 71 | a=(
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| 72 | 1
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| 73 | '2 3'
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| 74 | )
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| 75 | argv.py "${a[@]}"
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| 76 | ## stdout: ['1', '2 3']
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| 77 | ## status: 0
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| 78 |
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| 79 | #### array with invalid token
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| 80 | a=(
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| 81 | 1
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| 82 | &
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| 83 | '2 3'
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| 84 | )
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| 85 | argv.py "${a[@]}"
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| 86 | ## status: 2
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| 87 | ## OK mksh status: 1
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| 88 |
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| 89 | #### array with empty string
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| 90 | empty=('')
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| 91 | argv.py "${empty[@]}"
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| 92 | ## stdout: ['']
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| 93 |
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| 94 | #### Retrieve index
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| 95 | a=(1 '2 3')
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| 96 | argv.py "${a[1]}"
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| 97 | ## stdout: ['2 3']
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| 98 |
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| 99 | #### Retrieve out of bounds index
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| 100 | a=(1 '2 3')
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| 101 | argv.py "${a[3]}"
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| 102 | ## stdout: ['']
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| 103 |
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| 104 | #### Negative index
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| 105 | a=(1 '2 3')
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| 106 | argv.py "${a[-1]}" "${a[-2]}" "${a[-5]}" # last one out of bounds
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| 107 | ## stdout: ['2 3', '1', '']
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| 108 | ## N-I mksh stdout: ['', '', '']
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| 109 |
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| 110 | #### Negative index and sparse array
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| 111 | a=(0 1 2 3 4)
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| 112 | unset a[1]
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| 113 | unset a[4]
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| 114 | echo "${a[@]}"
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| 115 | echo -1 ${a[-1]}
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| 116 | echo -2 ${a[-2]}
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| 117 | echo -3 ${a[-3]}
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| 118 | echo -4 ${a[-4]}
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| 119 | echo -5 ${a[-5]}
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| 120 |
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| 121 | a[-1]+=0 # append 0 on the end
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| 122 | echo ${a[@]}
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| 123 | (( a[-1] += 42 ))
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| 124 | echo ${a[@]}
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| 125 |
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| 126 | ## STDOUT:
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| 127 | 0 2 3
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| 128 | -1 3
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| 129 | -2 2
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| 130 | -3
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| 131 | -4 0
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| 132 | -5
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| 133 | 0 2 30
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| 134 | 0 2 72
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| 135 | ## END
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| 136 | ## BUG mksh STDOUT:
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| 137 | 0 2 3
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| 138 | -1
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| 139 | -2
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| 140 | -3
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| 141 | -4
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| 142 | -5
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| 143 | 0 2 3 0
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| 144 | 0 2 3 42
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| 145 | ## END
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| 146 |
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| 147 | #### Negative index and sparse array
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| 148 | a=(0 1)
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| 149 | unset 'a[-1]' # remove last element
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| 150 | a+=(2 3)
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| 151 | echo ${a[0]} $((a[0]))
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| 152 | echo ${a[1]} $((a[1]))
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| 153 | echo ${a[2]} $((a[2]))
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| 154 | echo ${a[3]} $((a[3]))
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| 155 | ## STDOUT:
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| 156 | 0 0
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| 157 | 2 2
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| 158 | 3 3
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| 159 | 0
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| 160 | ## END
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| 161 | ## BUG mksh STDOUT:
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| 162 | 0 0
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| 163 | 1 1
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| 164 | 2 2
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| 165 | 3 3
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| 166 | ## END
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| 167 |
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| 168 | #### Length after unset
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| 169 | a=(0 1 2 3)
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| 170 | unset a[-1]
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| 171 | echo len=${#a[@]}
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| 172 | unset a[-1]
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| 173 | echo len=${#a[@]}
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| 174 | ## STDOUT:
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| 175 | len=3
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| 176 | len=2
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| 177 | ## END
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| 178 | ## BUG mksh STDOUT:
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| 179 | len=4
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| 180 | len=4
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| 181 | ## END
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| 182 |
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| 183 | #### Retrieve index that is a variable
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| 184 | a=(1 '2 3')
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| 185 | i=1
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| 186 | argv.py "${a[$i]}"
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| 187 | ## stdout: ['2 3']
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| 188 |
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| 189 | #### Retrieve index that is a variable without $
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| 190 | a=(1 '2 3')
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| 191 | i=5
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| 192 | argv.py "${a[i-4]}"
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| 193 | ## stdout: ['2 3']
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| 194 |
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| 195 | #### Retrieve index that is a command sub
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| 196 | a=(1 '2 3')
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| 197 | argv.py "${a[$(echo 1)]}"
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| 198 | ## stdout: ['2 3']
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| 199 |
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| 200 | #### Retrieve array indices with ${!a}
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| 201 | a=(1 '2 3')
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| 202 | argv.py "${!a[@]}"
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| 203 | ## stdout: ['0', '1']
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| 204 |
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| 205 | #### Retrieve sparse array indices with ${!a}
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| 206 | a=()
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| 207 | (( a[99]=1 ))
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| 208 | argv.py "${!a[@]}"
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| 209 | ## STDOUT:
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| 210 | ['99']
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| 211 | ## END
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| 212 |
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| 213 | #### ${!a[1]} is named ref in bash
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| 214 | # mksh ignores it
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| 215 | foo=bar
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| 216 | a=('1 2' foo '2 3')
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| 217 | argv.py "${!a[1]}"
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| 218 | ## status: 0
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| 219 | ## stdout: ['bar']
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| 220 | ## N-I mksh stdout: ['a[1]']
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| 221 |
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| 222 | #### ${!a} on array
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| 223 |
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| 224 | # bash gives empty string because it's like a[0]
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| 225 | # mksh gives the name of the variable with !. Very weird.
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| 226 |
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| 227 | a=(1 '2 3')
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| 228 | argv.py "${!a}"
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| 229 |
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| 230 | ## stdout: ['']
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| 231 | ## status: 0
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| 232 | ## BUG mksh stdout: ['a']
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| 233 | ## BUG mksh status: 0
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| 234 |
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| 235 | #### All elements unquoted
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| 236 | a=(1 '2 3')
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| 237 | argv.py ${a[@]}
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| 238 | ## stdout: ['1', '2', '3']
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| 239 |
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| 240 | #### All elements quoted
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| 241 | a=(1 '2 3')
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| 242 | argv.py "${a[@]}"
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| 243 | ## stdout: ['1', '2 3']
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| 244 |
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| 245 | #### $*
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| 246 | a=(1 '2 3')
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| 247 | argv.py ${a[*]}
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| 248 | ## stdout: ['1', '2', '3']
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| 249 |
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| 250 | #### "$*"
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| 251 | a=(1 '2 3')
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| 252 | argv.py "${a[*]}"
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| 253 | ## stdout: ['1 2 3']
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| 254 |
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| 255 | #### Interpolate array into array
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| 256 | a=(1 '2 3')
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| 257 | a=(0 "${a[@]}" '4 5')
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| 258 | argv.py "${a[@]}"
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| 259 | ## stdout: ['0', '1', '2 3', '4 5']
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| 260 |
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| 261 | #### Exporting array doesn't do anything, not even first element
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| 262 | # bash parses, but doesn't execute.
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| 263 | # mksh gives syntax error -- parses differently with 'export'
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| 264 | # osh no longer parses this statically.
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| 265 | export PYTHONPATH=(a b c)
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| 266 | export PYTHONPATH=a # NOTE: in bash, this doesn't work afterward!
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| 267 | printenv.py PYTHONPATH
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| 268 | ## stdout-json: ""
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| 269 | ## status: 1
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| 270 | ## OK bash stdout: None
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| 271 | ## OK bash status: 0
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| 272 |
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| 273 | #### Arrays can't be used as env bindings
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| 274 | # Hm bash it treats it as a string!
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| 275 | A=a B=(b b) printenv.py A B
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| 276 | ## status: 2
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| 277 | ## stdout-json: ""
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| 278 | ## OK bash stdout-json: "a\n(b b)\n"
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| 279 | ## OK bash status: 0
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| 280 | ## OK mksh status: 1
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| 281 |
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| 282 | #### Set element
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| 283 | a=(1 '2 3')
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| 284 | a[0]=9
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| 285 | argv.py "${a[@]}"
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| 286 | ## stdout: ['9', '2 3']
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| 287 |
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| 288 | #### Set element with var ref
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| 289 | a=(1 '2 3')
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| 290 | i=0
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| 291 | a[$i]=9
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| 292 | argv.py "${a[@]}"
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| 293 | ## stdout: ['9', '2 3']
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| 294 |
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| 295 | #### Set element with array ref
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| 296 | # This makes parsing a little more complex. Anything can be inside [],
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| 297 | # including other [].
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| 298 | a=(1 '2 3')
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| 299 | i=(0 1)
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| 300 | a[${i[1]}]=9
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| 301 | argv.py "${a[@]}"
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| 302 | ## stdout: ['1', '9']
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| 303 |
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| 304 | #### Set array item to array
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| 305 | a=(1 2)
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| 306 | a[0]=(3 4)
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| 307 | echo "status=$?"
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| 308 | ## stdout-json: ""
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| 309 | ## status: 2
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| 310 | ## N-I mksh status: 1
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| 311 | ## BUG bash stdout: status=1
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| 312 | ## BUG bash status: 0
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| 313 |
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| 314 | #### Slice of array with [@]
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| 315 | # mksh doesn't support this syntax! It's a bash extension.
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| 316 | a=(1 2 3)
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| 317 | argv.py "${a[@]:1:2}"
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| 318 | ## stdout: ['2', '3']
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| 319 | ## N-I mksh status: 1
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| 320 | ## N-I mksh stdout-json: ""
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| 321 |
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| 322 | #### Negative slice begin
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| 323 | # mksh doesn't support this syntax! It's a bash extension.
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| 324 | # NOTE: for some reason -2) has to be in parens? Ah that's because it
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| 325 | # conflicts with :-! That's silly. You can also add a space.
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| 326 | a=(1 2 3 4 5)
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| 327 | argv.py "${a[@]:(-4)}"
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| 328 | ## stdout: ['2', '3', '4', '5']
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| 329 | ## N-I mksh status: 1
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| 330 | ## N-I mksh stdout-json: ""
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| 331 |
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| 332 | #### Negative slice length
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| 333 | a=(1 2 3 4 5)
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| 334 | argv.py "${a[@]: 1: -3}"
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| 335 | ## status: 1
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| 336 | ## stdout-json: ""
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| 337 |
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| 338 | #### Slice with arithmetic
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| 339 | a=(1 2 3)
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| 340 | i=5
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| 341 | argv.py "${a[@]:i-4:2}"
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| 342 | ## stdout: ['2', '3']
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| 343 | ## N-I mksh status: 1
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| 344 | ## N-I mksh stdout-json: ""
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| 345 |
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| 346 | #### Number of elements
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| 347 | a=(1 '2 3')
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| 348 | echo "${#a[@]}" ${#a[@]} # bug fix: also test without quotes
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| 349 | ## stdout: 2 2
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| 350 |
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| 351 | #### Length of an element
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| 352 | a=(1 '2 3')
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| 353 | echo "${#a[1]}"
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| 354 | ## stdout: 3
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| 355 |
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| 356 | #### Iteration
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| 357 | a=(1 '2 3')
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| 358 | for v in "${a[@]}"; do
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| 359 | echo $v
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| 360 | done
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| 361 | ## stdout-json: "1\n2 3\n"
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| 362 |
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| 363 | #### glob within array yields separate elements
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| 364 | touch _tmp/y.Y _tmp/yy.Y
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| 365 | a=(_tmp/*.Y)
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| 366 | argv.py "${a[@]}"
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| 367 | ## stdout: ['_tmp/y.Y', '_tmp/yy.Y']
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| 368 |
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| 369 | #### declare array and then append
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| 370 | declare -a array
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| 371 | array+=(a)
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| 372 | array+=(b c)
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| 373 | argv.py "${array[@]}"
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| 374 | ## stdout: ['a', 'b', 'c']
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| 375 |
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| 376 | #### Array syntax in wrong place
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| 377 | ls foo=(1 2)
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| 378 | ## status: 1
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| 379 | ## OK bash status: 2
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| 380 |
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| 381 | #### Single array with :-
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| 382 | # bash does EMPTY ELISION here, unless it's double quoted. mksh has
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| 383 | # more sane behavior. OSH is better.
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| 384 | single=('')
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| 385 | argv.py ${single[@]:-none} x "${single[@]:-none}"
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| 386 | ## OK osh stdout: ['x', '']
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| 387 | ## OK bash stdout: ['none', 'x', '']
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| 388 | ## OK mksh stdout: ['none', 'x', 'none']
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| 389 |
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| 390 | #### Stripping a whole array unquoted
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| 391 | # Problem: it joins it first.
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| 392 | files=('foo.c' 'sp ace.h' 'bar.c')
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| 393 | argv.py ${files[@]%.c}
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| 394 | ## status: 0
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| 395 | ## stdout: ['foo', 'sp', 'ace.h', 'bar']
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| 396 | ## N-I mksh status: 1
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| 397 | ## N-I mksh stdout-json: ""
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| 398 |
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| 399 | #### Stripping a whole array quoted
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| 400 | files=('foo.c' 'sp ace.h' 'bar.c')
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| 401 | argv.py "${files[@]%.c}"
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| 402 | ## status: 0
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| 403 | ## stdout: ['foo', 'sp ace.h', 'bar']
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| 404 | ## N-I mksh status: 1
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| 405 | ## N-I mksh stdout-json: ""
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| 406 |
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| 407 | #### Multiple subscripts not allowed
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| 408 | # NOTE: bash 4.3 had a bug where it ignored the bad subscript, but now it is
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| 409 | # fixed.
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| 410 | a=('123' '456')
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| 411 | argv.py "${a[0]}" "${a[0][0]}"
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| 412 | ## stdout-json: ""
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| 413 | ## status: 2
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| 414 | ## OK bash/mksh status: 1
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| 415 |
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| 416 | #### Length op, index op, then transform op is not allowed
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| 417 | a=('123' '456')
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| 418 | echo "${#a[0]}" "${#a[0]/1/xxx}"
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| 419 | ## stdout-json: ""
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| 420 | ## status: 2
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| 421 | ## OK bash/mksh status: 1
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| 422 |
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| 423 | #### Array subscript not allowed on string
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| 424 | s='abc'
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| 425 | echo ${s[@]}
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| 426 | ## BUG bash/mksh status: 0
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| 427 | ## BUG bash/mksh stdout: abc
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| 428 | ## status: 1
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| 429 |
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| 430 | #### Create a "user" array out of the argv array
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| 431 | set -- 'a b' 'c'
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| 432 | array1=('x y' 'z')
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| 433 | array2=("$@")
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| 434 | argv.py "${array1[@]}" "${array2[@]}"
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| 435 | ## stdout: ['x y', 'z', 'a b', 'c']
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| 436 |
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| 437 | #### Tilde expansion within array
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| 438 | HOME=/home/bob
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| 439 | a=(~/src ~/git)
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| 440 | echo "${a[@]}"
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| 441 | ## stdout: /home/bob/src /home/bob/git
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| 442 |
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| 443 | #### Brace Expansion within Array
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| 444 | a=(-{a,b} {c,d}-)
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| 445 | echo "${a[@]}"
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| 446 | ## stdout: -a -b c- d-
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| 447 |
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| 448 | #### array default
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| 449 | default=('1 2' '3')
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| 450 | argv.py "${undef[@]:-${default[@]}}"
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| 451 | ## stdout: ['1 2', '3']
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| 452 |
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| 453 | #### Singleton Array Copy and Assign. OSH can't index strings with ints
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| 454 | a=( '12 3' )
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| 455 | b=( "${a[@]}" )
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| 456 | c="${a[@]}" # This decays it to a string
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| 457 | d=${a[*]} # This decays it to a string
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| 458 | echo ${#a[0]} ${#b[0]}
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| 459 | echo ${#a[@]} ${#b[@]}
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| 460 |
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| 461 | # osh is intentionally stricter, and these fail.
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| 462 | echo ${#c[0]} ${#d[0]}
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| 463 | echo ${#c[@]} ${#d[@]}
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| 464 |
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| 465 | ## status: 1
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| 466 | ## STDOUT:
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| 467 | 4 4
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| 468 | 1 1
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| 469 | ## END
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| 470 | ## OK bash/mksh status: 0
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| 471 | ## OK bash/mksh STDOUT:
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| 472 | 4 4
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| 473 | 1 1
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| 474 | 4 4
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| 475 | 1 1
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| 476 | ## END
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| 477 |
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| 478 | #### declare -a / local -a is empty array
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| 479 | declare -a myarray
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| 480 | argv.py "${myarray[@]}"
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| 481 | myarray+=('x')
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| 482 | argv.py "${myarray[@]}"
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| 483 |
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| 484 | f() {
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| 485 | local -a myarray
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| 486 | argv.py "${myarray[@]}"
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| 487 | myarray+=('x')
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| 488 | argv.py "${myarray[@]}"
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| 489 | }
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| 490 | f
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| 491 | ## STDOUT:
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| 492 | []
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| 493 | ['x']
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| 494 | []
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| 495 | ['x']
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| 496 | ## END
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| 497 |
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| 498 | #### Create sparse array
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| 499 | a=()
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| 500 | (( a[99]=1 )) # osh doesn't parse index assignment outside arithmetic yet
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| 501 | echo len=${#a[@]}
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| 502 | argv.py "${a[@]}"
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| 503 | echo "unset=${a[33]}"
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| 504 | echo len-of-unset=${#a[33]}
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| 505 | ## STDOUT:
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| 506 | len=1
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| 507 | ['1']
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| 508 | unset=
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| 509 | len-of-unset=0
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| 510 | ## END
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| 511 |
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| 512 | #### Create sparse array implicitly
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| 513 | (( a[99]=1 ))
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| 514 | echo len=${#a[@]}
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| 515 | argv.py "${a[@]}"
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| 516 | echo "unset=${a[33]}"
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| 517 | echo len-of-unset=${#a[33]}
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| 518 | ## STDOUT:
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| 519 | len=1
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| 520 | ['1']
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| 521 | unset=
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| 522 | len-of-unset=0
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| 523 | ## END
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| 524 |
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| 525 | #### Append sparse arrays
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| 526 | a=()
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| 527 | (( a[99]=1 ))
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| 528 | b=()
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| 529 | (( b[33]=2 ))
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| 530 | (( b[66]=3 ))
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| 531 | a+=( "${b[@]}" )
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| 532 | argv.py "${a[@]}"
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| 533 | argv.py "${a[99]}" "${a[100]}" "${a[101]}"
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| 534 | ## STDOUT:
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| 535 | ['1', '2', '3']
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| 536 | ['1', '2', '3']
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| 537 | ## END
|
| 538 |
|
| 539 | #### Slice of sparse array with [@]
|
| 540 | # mksh doesn't support this syntax! It's a bash extension.
|
| 541 | (( a[33]=1 ))
|
| 542 | (( a[66]=2 ))
|
| 543 | (( a[99]=2 ))
|
| 544 | argv.py "${a[@]:15:2}"
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| 545 | ## stdout: ['1', '2']
|
| 546 | ## N-I mksh status: 1
|
| 547 | ## N-I mksh stdout-json: ""
|
| 548 |
|
| 549 | #### Using an array itself as the index on LHS
|
| 550 | shopt -u strict_arith
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| 551 | a[a]=42
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| 552 | a[a]=99
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| 553 | argv.py "${a[@]}" "${a[0]}" "${a[42]}" "${a[99]}"
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| 554 |
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| 555 | ## status: 0
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| 556 | ## STDOUT:
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| 557 | ['42', '99', '42', '99', '']
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| 558 | ## END
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| 559 |
|
| 560 | #### Using an array itself as the index on RHS
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| 561 | shopt -u strict_arith
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| 562 | a=(1 2 3)
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| 563 | (( x = a[a] ))
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| 564 | echo $x
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| 565 | ## status: 0
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| 566 | ## STDOUT:
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| 567 | 2
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| 568 | ## END
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| 569 |
|
| 570 | #### a[$x$y] on LHS and RHS
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| 571 | x=1
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| 572 | y=2
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| 573 | a[$x$y]=foo
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| 574 |
|
| 575 | # not allowed by OSH parsing
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| 576 | #echo ${a[$x$y]}
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| 577 |
|
| 578 | echo ${a[12]}
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| 579 | echo ${#a[@]}
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| 580 |
|
| 581 | ## STDOUT:
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| 582 | foo
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| 583 | 1
|
| 584 | ## END
|
| 585 |
|
| 586 |
|
| 587 | #### Dynamic parsing of LHS a[$code]=value
|
| 588 |
|
| 589 | declare -a array
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| 590 | array[x=1]='one'
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| 591 |
|
| 592 | code='y=2'
|
| 593 | #code='1+2' # doesn't work either
|
| 594 | array[$code]='two'
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| 595 |
|
| 596 | argv.py "${array[@]}"
|
| 597 | echo x=$x
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| 598 | echo y=$y
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| 599 |
|
| 600 | ## STDOUT:
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| 601 | ['one', 'two']
|
| 602 | x=1
|
| 603 | y=2
|
| 604 | ## END
|
| 605 | ## N-I dash stdout-json: ""
|
| 606 | ## N-I dash status: 2
|
| 607 |
|
| 608 | #### Dynamic parsing of RHS ${a[$code]}
|
| 609 | declare -a array
|
| 610 | array=(zero one two three)
|
| 611 |
|
| 612 | echo ${array[1+2]}
|
| 613 |
|
| 614 | code='1+2'
|
| 615 | echo ${array[$code]}
|
| 616 |
|
| 617 | ## STDOUT:
|
| 618 | three
|
| 619 | three
|
| 620 | ## END
|
| 621 |
|
| 622 | # it still dynamically parses
|
| 623 |
|
| 624 | ## OK zsh STDOUT:
|
| 625 | two
|
| 626 | two
|
| 627 | ## END
|