| 1 | ## compare_shells: dash bash mksh zsh
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| 2 | ## oils_failures_allowed: 0
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| 3 |
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| 4 | #### implicit for loop
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| 5 | # This is like "for i in $@".
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| 6 | fun() {
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| 7 | for i; do
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| 8 | echo $i
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| 9 | done
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| 10 | echo "finished=$i"
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| 11 | }
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| 12 | fun 1 2 3
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| 13 | ## STDOUT:
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| 14 | 1
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| 15 | 2
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| 16 | 3
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| 17 | finished=3
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| 18 | ## END
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| 19 |
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| 20 | #### empty for loop (has "in")
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| 21 | set -- 1 2 3
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| 22 | for i in ; do
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| 23 | echo $i
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| 24 | done
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| 25 | ## STDOUT:
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| 26 | ## END
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| 27 |
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| 28 | #### for loop with invalid identifier
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| 29 | # should be compile time error, but runtime error is OK too
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| 30 | for - in a b c; do
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| 31 | echo hi
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| 32 | done
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| 33 | ## stdout-json: ""
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| 34 | ## status: 2
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| 35 | ## OK bash/mksh status: 1
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| 36 | ## BUG zsh stdout: hi
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| 37 | ## BUG zsh status: 1
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| 38 |
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| 39 | #### the word 'in' can be the loop variable
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| 40 |
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| 41 | for in in a b c; do
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| 42 | echo $in
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| 43 | done
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| 44 | echo finished=$in
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| 45 | ## STDOUT:
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| 46 | a
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| 47 | b
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| 48 | c
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| 49 | finished=c
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| 50 | ## END
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| 51 |
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| 52 | #### Tilde expansion within for loop
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| 53 | HOME=/home/bob
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| 54 | for name in ~/src ~/git; do
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| 55 | echo $name
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| 56 | done
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| 57 | ## STDOUT:
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| 58 | /home/bob/src
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| 59 | /home/bob/git
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| 60 | ## END
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| 61 |
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| 62 | #### Brace Expansion within Array
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| 63 | for i in -{a,b} {c,d}-; do
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| 64 | echo $i
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| 65 | done
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| 66 | ## STDOUT:
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| 67 | -a
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| 68 | -b
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| 69 | c-
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| 70 | d-
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| 71 | ## END
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| 72 | ## N-I dash STDOUT:
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| 73 | -{a,b}
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| 74 | {c,d}-
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| 75 | ## END
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| 76 |
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| 77 | #### using loop var outside loop
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| 78 | fun() {
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| 79 | for i in a b c; do
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| 80 | echo $i
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| 81 | done
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| 82 | echo $i
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| 83 | }
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| 84 | fun
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| 85 | ## status: 0
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| 86 | ## STDOUT:
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| 87 | a
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| 88 | b
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| 89 | c
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| 90 | c
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| 91 | ## END
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| 92 |
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| 93 | #### continue
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| 94 | for i in a b c; do
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| 95 | echo $i
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| 96 | if test $i = b; then
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| 97 | continue
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| 98 | fi
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| 99 | echo $i
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| 100 | done
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| 101 | ## status: 0
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| 102 | ## STDOUT:
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| 103 | a
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| 104 | a
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| 105 | b
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| 106 | c
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| 107 | c
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| 108 | ## END
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| 109 |
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| 110 | #### break
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| 111 | for i in a b c; do
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| 112 | echo $i
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| 113 | if test $i = b; then
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| 114 | break
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| 115 | fi
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| 116 | done
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| 117 | ## status: 0
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| 118 | ## STDOUT:
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| 119 | a
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| 120 | b
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| 121 | ## END
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| 122 |
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| 123 | #### while in while condition
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| 124 | # This is a consequence of the grammar
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| 125 | while while true; do echo cond; break; done
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| 126 | do
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| 127 | echo body
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| 128 | break
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| 129 | done
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| 130 | ## STDOUT:
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| 131 | cond
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| 132 | body
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| 133 | ## END
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| 134 |
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| 135 | #### while in pipe
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| 136 | x=$(find spec/ | wc -l)
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| 137 | y=$(find spec/ | while read path; do
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| 138 | echo $path
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| 139 | done | wc -l
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| 140 | )
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| 141 | test $x -eq $y
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| 142 | echo status=$?
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| 143 | ## stdout: status=0
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| 144 |
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| 145 | #### while in pipe with subshell
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| 146 | i=0
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| 147 | seq 3 | ( while read foo; do
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| 148 | i=$((i+1))
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| 149 | #echo $i
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| 150 | done
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| 151 | echo $i )
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| 152 | ## stdout: 3
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| 153 |
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| 154 | #### until loop
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| 155 | # This is just the opposite of while? while ! cond?
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| 156 | until false; do
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| 157 | echo hi
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| 158 | break
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| 159 | done
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| 160 | ## stdout: hi
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| 161 |
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| 162 | #### continue at top level
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| 163 | if true; then
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| 164 | echo one
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| 165 | continue
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| 166 | echo two
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| 167 | fi
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| 168 | ## status: 0
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| 169 | ## STDOUT:
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| 170 | one
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| 171 | two
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| 172 | ## END
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| 173 | # zsh behaves like strict_control_flow!
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| 174 | ## OK zsh status: 1
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| 175 | ## OK zsh STDOUT:
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| 176 | one
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| 177 | ## END
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| 178 |
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| 179 | #### continue in subshell
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| 180 | for i in $(seq 2); do
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| 181 | echo "> $i"
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| 182 | ( if true; then continue; fi; echo "Should not print" )
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| 183 | echo subshell status=$?
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| 184 | echo ". $i"
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| 185 | done
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| 186 | ## STDOUT:
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| 187 | # osh lets you fail
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| 188 | > 1
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| 189 | subshell status=1
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| 190 | . 1
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| 191 | > 2
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| 192 | subshell status=1
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| 193 | . 2
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| 194 | ## END
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| 195 | ## OK dash/zsh STDOUT:
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| 196 | > 1
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| 197 | subshell status=0
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| 198 | . 1
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| 199 | > 2
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| 200 | subshell status=0
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| 201 | . 2
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| 202 | ## END
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| 203 | ## BUG mksh/bash STDOUT:
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| 204 | > 1
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| 205 | Should not print
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| 206 | subshell status=0
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| 207 | . 1
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| 208 | > 2
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| 209 | Should not print
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| 210 | subshell status=0
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| 211 | . 2
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| 212 | ## END
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| 213 |
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| 214 | #### continue in subshell aborts with errexit
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| 215 | # The other shells don't let you recover from this programming error!
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| 216 | set -o errexit
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| 217 | for i in $(seq 2); do
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| 218 | echo "> $i"
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| 219 | ( if true; then continue; fi; echo "Should not print" )
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| 220 | echo 'should fail after subshell'
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| 221 | echo ". $i"
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| 222 | done
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| 223 |
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| 224 | ## STDOUT:
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| 225 | > 1
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| 226 | ## END
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| 227 | ## status: 1
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| 228 |
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| 229 | ## BUG-2 dash/zsh STDOUT:
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| 230 | > 1
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| 231 | should fail after subshell
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| 232 | . 1
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| 233 | > 2
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| 234 | should fail after subshell
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| 235 | . 2
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| 236 | ## END
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| 237 | ## BUG-2 dash/zsh status: 0
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| 238 |
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| 239 | ## BUG mksh/bash STDOUT:
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| 240 | > 1
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| 241 | Should not print
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| 242 | should fail after subshell
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| 243 | . 1
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| 244 | > 2
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| 245 | Should not print
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| 246 | should fail after subshell
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| 247 | . 2
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| 248 | ## END
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| 249 | ## BUG mksh/bash status: 0
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| 250 |
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| 251 | #### bad arg to break
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| 252 | x=oops
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| 253 | while true; do
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| 254 | echo hi
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| 255 | break $x
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| 256 | sleep 0.1
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| 257 | done
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| 258 | ## stdout: hi
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| 259 | ## status: 1
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| 260 | ## OK dash status: 2
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| 261 | ## OK bash status: 128
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| 262 |
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| 263 | #### too many args to continue
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| 264 | # OSH treats this as a parse error
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| 265 | for x in a b c; do
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| 266 | echo $x
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| 267 | # bash breaks rather than continue or fatal error!!!
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| 268 | continue 1 2 3
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| 269 | done
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| 270 | echo --
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| 271 | ## stdout-json: ""
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| 272 | ## status: 2
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| 273 | ## BUG bash STDOUT:
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| 274 | a
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| 275 | --
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| 276 | ## END
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| 277 | ## BUG bash status: 0
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| 278 | ## BUG-2 dash/mksh/zsh STDOUT:
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| 279 | a
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| 280 | b
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| 281 | c
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| 282 | --
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| 283 | ## END
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| 284 | ## BUG-2 dash/mksh/zsh status: 0
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| 285 |
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| 286 | #### break in condition of loop
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| 287 | while break; do
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| 288 | echo x
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| 289 | done
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| 290 | echo done
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| 291 | ## STDOUT:
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| 292 | done
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| 293 | ## END
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| 294 |
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| 295 |
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| 296 | #### break in condition of nested loop
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| 297 | for i in 1 2 3; do
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| 298 | echo i=$i
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| 299 | while break; do
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| 300 | echo x
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| 301 | done
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| 302 | done
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| 303 | echo done
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| 304 | ## STDOUT:
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| 305 | i=1
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| 306 | i=2
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| 307 | i=3
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| 308 | done
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| 309 | ## END
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| 310 |
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| 311 | #### return within eval
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| 312 | f() {
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| 313 | echo one
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| 314 | eval 'return'
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| 315 | echo two
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| 316 | }
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| 317 | f
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| 318 | ## STDOUT:
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| 319 | one
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| 320 | ## END
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| 321 |
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| 322 | #### break/continue within eval
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| 323 | # NOTE: This changes things
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| 324 | # set -e
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| 325 | f() {
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| 326 | for i in $(seq 5); do
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| 327 | if test $i = 2; then
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| 328 | eval continue
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| 329 | fi
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| 330 | if test $i = 4; then
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| 331 | eval break
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| 332 | fi
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| 333 | echo $i
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| 334 | done
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| 335 |
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| 336 | eval 'return'
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| 337 | echo 'done'
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| 338 | }
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| 339 | f
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| 340 | ## STDOUT:
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| 341 | 1
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| 342 | 3
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| 343 | ## END
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| 344 | ## BUG mksh STDOUT:
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| 345 | 1
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| 346 | 2
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| 347 | 3
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| 348 | 4
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| 349 | 5
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| 350 | ## END
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| 351 |
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| 352 | #### break/continue within source
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| 353 | # NOTE: This changes things
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| 354 | # set -e
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| 355 |
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| 356 | cd $REPO_ROOT
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| 357 | f() {
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| 358 | for i in $(seq 5); do
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| 359 | if test $i = 2; then
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| 360 | . spec/testdata/continue.sh
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| 361 | fi
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| 362 | if test $i = 4; then
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| 363 | . spec/testdata/break.sh
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| 364 | fi
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| 365 | echo $i
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| 366 | done
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| 367 |
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| 368 | # Return is different!
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| 369 | . spec/testdata/return.sh
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| 370 | echo done
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| 371 | }
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| 372 | f
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| 373 | ## STDOUT:
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| 374 | 1
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| 375 | 3
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| 376 | done
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| 377 | ## END
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| 378 | ## BUG zsh/mksh STDOUT:
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| 379 | 1
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| 380 | 2
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| 381 | 3
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| 382 | 4
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| 383 | 5
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| 384 | done
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| 385 | ## END
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| 386 |
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| 387 | #### top-level break/continue/return (without strict_control_flow)
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| 388 | $SH -c 'break; echo break=$?'
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| 389 | $SH -c 'continue; echo continue=$?'
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| 390 | $SH -c 'return; echo return=$?'
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| 391 | ## STDOUT:
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| 392 | break=0
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| 393 | continue=0
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| 394 | ## END
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| 395 | ## BUG-2 zsh STDOUT:
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| 396 | ## END
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| 397 | ## BUG bash STDOUT:
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| 398 | break=0
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| 399 | continue=0
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| 400 | return=2
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| 401 | ## END
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| 402 |
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| 403 |
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| 404 | #### multi-level break with argument
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| 405 |
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| 406 | # reported in issue #1459
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| 407 |
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| 408 | counterA=100
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| 409 | counterB=100
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| 410 |
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| 411 | while test "$counterA" -gt 0
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| 412 | do
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| 413 | counterA=$((counterA - 1))
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| 414 | while test "$counterB" -gt 0
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| 415 | do
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| 416 | counterB=$((counterB - 1))
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| 417 | if test "$counterB" = 50
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| 418 | then
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| 419 | break 2
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| 420 | fi
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| 421 | done
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| 422 | done
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| 423 |
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| 424 | echo "$counterA"
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| 425 | echo "$counterB"
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| 426 |
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| 427 | ## STDOUT:
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| 428 | 99
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| 429 | 50
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| 430 | ## END
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| 431 |
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| 432 |
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| 433 | #### multi-level continue
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| 434 |
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| 435 | for i in 1 2; do
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| 436 | for j in a b c; do
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| 437 | if test $j = b; then
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| 438 | continue
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| 439 | fi
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| 440 | echo $i $j
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| 441 | done
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| 442 | done
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| 443 |
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| 444 | echo ---
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| 445 |
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| 446 | for i in 1 2; do
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| 447 | for j in a b c; do
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| 448 | if test $j = b; then
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| 449 | continue 2 # MULTI-LEVEL
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| 450 | fi
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| 451 | echo $i $j
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| 452 | done
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| 453 | done
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| 454 |
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| 455 | ## STDOUT:
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| 456 | 1 a
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| 457 | 1 c
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| 458 | 2 a
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| 459 | 2 c
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| 460 | ---
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| 461 | 1 a
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| 462 | 2 a
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| 463 | ## END
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| 464 |
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| 465 | #### $b break, $c continue, $r return, $e exit
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| 466 |
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| 467 | # hm would it be saner to make FATAL builtins called break/continue/etc.?
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| 468 | # On the other hand, this spits out errors loudly.
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| 469 |
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| 470 | echo '- break'
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| 471 | b=break
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| 472 | for i in 1 2 3; do
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| 473 | echo $i
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| 474 | $b
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| 475 | done
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| 476 |
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| 477 | echo '- continue'
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| 478 | c='continue'
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| 479 | for i in 1 2 3; do
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| 480 | if test $i = 2; then
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| 481 | $c
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| 482 | fi
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| 483 | echo $i
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| 484 | done
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| 485 |
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| 486 | r='return'
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| 487 | f() {
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| 488 | echo '- return'
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| 489 | for i in 1 2 3; do
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| 490 | echo $i
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| 491 | if test $i = 2; then
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| 492 | $r 99
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| 493 | fi
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| 494 | done
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| 495 | }
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| 496 | f
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| 497 | echo status=$?
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| 498 |
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| 499 | echo '- exit'
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| 500 | e='exit'
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| 501 | $e 5
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| 502 | echo 'not executed'
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| 503 |
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| 504 | ## status: 5
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| 505 | ## STDOUT:
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| 506 | - break
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| 507 | 1
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| 508 | - continue
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| 509 | 1
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| 510 | 3
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| 511 | - return
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| 512 | 1
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| 513 | 2
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| 514 | status=99
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| 515 | - exit
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| 516 | ## END
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| 517 |
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| 518 | #### \break \continue \return \exit
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| 519 |
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| 520 | echo '- break'
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| 521 | for i in 1 2 3; do
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| 522 | echo $i
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| 523 | \break
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| 524 | done
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| 525 |
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| 526 | echo '- continue'
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| 527 | for i in 1 2 3; do
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| 528 | if test $i = 2; then
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| 529 | \continue
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| 530 | fi
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| 531 | echo $i
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| 532 | done
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| 533 |
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| 534 | f() {
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| 535 | echo '- return'
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| 536 | for i in 1 2 3; do
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| 537 | echo $i
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| 538 | if test $i = 2; then
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| 539 | \return 99
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| 540 | fi
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| 541 | done
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| 542 | }
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| 543 | f
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| 544 | echo status=$?
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| 545 |
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| 546 | echo '- exit'
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| 547 | \exit 5
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| 548 | echo 'not executed'
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| 549 |
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| 550 | ## status: 5
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| 551 | ## STDOUT:
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| 552 | - break
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| 553 | 1
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| 554 | - continue
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| 555 | 1
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| 556 | 3
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| 557 | - return
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| 558 | 1
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| 559 | 2
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| 560 | status=99
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| 561 | - exit
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| 562 | ## END
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| 563 |
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| 564 | #### builtin,command break,continue,return,exit
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| 565 | case $SH in dash|zsh) exit ;; esac
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| 566 |
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| 567 | echo '- break'
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| 568 | for i in 1 2 3; do
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| 569 | echo $i
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| 570 | builtin break
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| 571 | done
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| 572 |
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| 573 | echo '- continue'
|
| 574 | for i in 1 2 3; do
|
| 575 | if test $i = 2; then
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| 576 | command continue
|
| 577 | fi
|
| 578 | echo $i
|
| 579 | done
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| 580 |
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| 581 | f() {
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| 582 | echo '- return'
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| 583 | for i in 1 2 3; do
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| 584 | echo $i
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| 585 | if test $i = 2; then
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| 586 | builtin command return 99
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| 587 | fi
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| 588 | done
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| 589 | }
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| 590 | f
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| 591 | echo status=$?
|
| 592 |
|
| 593 | echo '- exit'
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| 594 | command builtin exit 5
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| 595 | echo 'not executed'
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| 596 |
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| 597 | ## status: 5
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| 598 | ## STDOUT:
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| 599 | - break
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| 600 | 1
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| 601 | - continue
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| 602 | 1
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| 603 | 3
|
| 604 | - return
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| 605 | 1
|
| 606 | 2
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| 607 | status=99
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| 608 | - exit
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| 609 | ## END
|
| 610 |
|
| 611 | ## N-I dash/zsh status: 0
|
| 612 | ## N-I dash/zsh STDOUT:
|
| 613 | ## END
|
| 614 |
|
| 615 |
|