| 1 | ## compare_shells: dash bash-4.4 mksh
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| 2 |
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| 3 |
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| 4 | # In this file:
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| 5 | #
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| 6 | # - strict_control-flow: break/continue at the top level should be fatal!
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| 7 | #
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| 8 | # Other tests:
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| 9 | # - spec/errexit-strict: command subs inherit errexit
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| 10 | # - TODO: does bash 4.4. use inherit_errexit?
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| 11 | #
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| 12 | # - spec/var-op-other tests strict_word-eval (negative indices and invalid
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| 13 | # utf-8)
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| 14 | # - hm I think these should be the default? compat-word-eval?
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| 15 | #
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| 16 | # - spec/arith tests strict_arith - invalid strings become 0
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| 17 | # - OSH has a warning that can turn into an error. I think the error could
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| 18 | # be the default (since this was a side effect of "ShellMathShock")
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| 19 |
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| 20 | # - strict_array: unimplemented.
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| 21 | # - WAS undef[2]=x, but bash-completion relied on the associative array
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| 22 | # version of that.
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| 23 | # - TODO: It should disable decay_array EVERYWHERE except a specific case like:
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| 24 | # - s="${a[*]}" # quoted, the unquoted ones glob in a command context
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| 25 | # - spec/dbracket has array comparison relevant to the case below
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| 26 | #
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| 27 | # Most of those options could be compat-*.
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| 28 | #
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| 29 | # One that can't: strict_scope disables dynamic scope.
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| 30 |
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| 31 |
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| 32 | #### strict_arith option
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| 33 | shopt -s strict_arith
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| 34 | ## status: 0
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| 35 | ## N-I bash status: 1
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| 36 | ## N-I dash/mksh status: 127
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| 37 |
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| 38 | #### Sourcing a script that returns at the top level
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| 39 | echo one
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| 40 | . $REPO_ROOT/spec/testdata/return-helper.sh
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| 41 | echo $?
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| 42 | echo two
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| 43 | ## STDOUT:
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| 44 | one
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| 45 | return-helper.sh
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| 46 | 42
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| 47 | two
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| 48 | ## END
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| 49 |
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| 50 | #### top level control flow
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| 51 | $SH $REPO_ROOT/spec/testdata/top-level-control-flow.sh
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| 52 | ## status: 0
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| 53 | ## STDOUT:
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| 54 | SUBSHELL
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| 55 | BREAK
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| 56 | CONTINUE
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| 57 | RETURN
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| 58 | ## OK bash STDOUT:
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| 59 | SUBSHELL
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| 60 | BREAK
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| 61 | CONTINUE
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| 62 | RETURN
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| 63 | DONE
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| 64 | ## END
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| 65 |
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| 66 | #### errexit and top-level control flow
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| 67 | $SH -o errexit $REPO_ROOT/spec/testdata/top-level-control-flow.sh
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| 68 | ## status: 2
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| 69 | ## OK bash status: 1
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| 70 | ## STDOUT:
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| 71 | SUBSHELL
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| 72 | ## END
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| 73 |
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| 74 | #### shopt -s strict_control_flow
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| 75 | shopt -s strict_control_flow || true
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| 76 | echo break
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| 77 | break
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| 78 | echo hi
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| 79 | ## STDOUT:
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| 80 | break
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| 81 | ## END
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| 82 | ## status: 1
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| 83 | ## N-I dash/bash/mksh STDOUT:
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| 84 | break
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| 85 | hi
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| 86 | # END
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| 87 | ## N-I dash/bash/mksh status: 0
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| 88 |
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| 89 | #### return at top level is an error
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| 90 | return
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| 91 | echo "status=$?"
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| 92 | ## stdout-json: ""
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| 93 | ## OK bash STDOUT:
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| 94 | status=1
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| 95 | ## END
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| 96 |
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| 97 | #### continue at top level is NOT an error
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| 98 | # NOTE: bash and mksh both print warnings, but don't exit with an error.
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| 99 | continue
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| 100 | echo status=$?
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| 101 | ## stdout: status=0
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| 102 |
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| 103 | #### break at top level is NOT an error
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| 104 | break
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| 105 | echo status=$?
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| 106 | ## stdout: status=0
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| 107 |
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| 108 | #### empty argv WITHOUT strict_argv
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| 109 | x=''
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| 110 | $x
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| 111 | echo status=$?
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| 112 |
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| 113 | if $x; then
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| 114 | echo VarSub
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| 115 | fi
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| 116 |
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| 117 | if $(echo foo >/dev/null); then
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| 118 | echo CommandSub
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| 119 | fi
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| 120 |
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| 121 | if "$x"; then
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| 122 | echo VarSub
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| 123 | else
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| 124 | echo VarSub FAILED
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| 125 | fi
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| 126 |
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| 127 | if "$(echo foo >/dev/null)"; then
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| 128 | echo CommandSub
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| 129 | else
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| 130 | echo CommandSub FAILED
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| 131 | fi
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| 132 |
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| 133 | ## STDOUT:
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| 134 | status=0
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| 135 | VarSub
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| 136 | CommandSub
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| 137 | VarSub FAILED
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| 138 | CommandSub FAILED
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| 139 | ## END
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| 140 |
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| 141 | #### empty argv WITH strict_argv
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| 142 | shopt -s strict_argv || true
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| 143 | echo empty
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| 144 | x=''
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| 145 | $x
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| 146 | echo status=$?
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| 147 | ## status: 1
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| 148 | ## STDOUT:
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| 149 | empty
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| 150 | ## END
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| 151 | ## N-I dash/bash/mksh status: 0
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| 152 | ## N-I dash/bash/mksh STDOUT:
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| 153 | empty
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| 154 | status=0
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| 155 | ## END
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| 156 |
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| 157 | #### Arrays are incorrectly compared, but strict_array prevents it
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| 158 |
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| 159 | # NOTE: from spec/dbracket has a test case like this
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| 160 | # sane-array should turn this ON.
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| 161 | # bash and mksh allow this because of decay
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| 162 |
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| 163 | a=('a b' 'c d')
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| 164 | b=('a' 'b' 'c' 'd')
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| 165 | echo ${#a[@]}
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| 166 | echo ${#b[@]}
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| 167 | [[ "${a[@]}" == "${b[@]}" ]] && echo EQUAL
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| 168 |
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| 169 | shopt -s strict_array || true
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| 170 | [[ "${a[@]}" == "${b[@]}" ]] && echo EQUAL
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| 171 |
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| 172 | ## status: 1
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| 173 | ## STDOUT:
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| 174 | 2
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| 175 | 4
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| 176 | EQUAL
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| 177 | ## END
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| 178 | ## OK bash/mksh status: 0
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| 179 | ## OK bash/mksh STDOUT:
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| 180 | 2
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| 181 | 4
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| 182 | EQUAL
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| 183 | EQUAL
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| 184 | ## END
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| 185 | ## N-I dash status: 2
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| 186 | ## N-I dash stdout-json: ""
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| 187 |
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| 188 | #### automatically creating arrays WITHOUT strict_array
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| 189 | undef[2]=x
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| 190 | undef[3]=y
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| 191 | argv.py "${undef[@]}"
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| 192 | ## STDOUT:
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| 193 | ['x', 'y']
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| 194 | ## END
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| 195 | ## N-I dash status: 2
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| 196 | ## N-I dash stdout-json: ""
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| 197 |
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| 198 | #### automatically creating arrays are INDEXED, not associative
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| 199 | shopt -u strict_arith || true
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| 200 |
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| 201 | undef[2]=x
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| 202 | undef[3]=y
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| 203 | x='bad'
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| 204 | # bad gets coerced to zero, but this is part of the RECURSIVE arithmetic
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| 205 | # behavior, which we want to disallow. Consider disallowing in OSH.
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| 206 |
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| 207 | undef[$x]=zzz
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| 208 | argv.py "${undef[@]}"
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| 209 | ## STDOUT:
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| 210 | ['zzz', 'x', 'y']
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| 211 | ## END
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| 212 | ## N-I dash status: 2
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| 213 | ## N-I dash stdout-json: ""
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| 214 |
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| 215 | #### simple_eval_builtin
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| 216 | for i in 1 2; do
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| 217 | eval # zero args
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| 218 | echo status=$?
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| 219 | eval echo one
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| 220 | echo status=$?
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| 221 | eval 'echo two'
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| 222 | echo status=$?
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| 223 | shopt -s simple_eval_builtin
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| 224 | echo ---
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| 225 | done
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| 226 | ## STDOUT:
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| 227 | status=0
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| 228 | one
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| 229 | status=0
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| 230 | two
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| 231 | status=0
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| 232 | ---
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| 233 | status=2
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| 234 | status=2
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| 235 | two
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| 236 | status=0
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| 237 | ---
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| 238 | ## END
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| 239 | ## N-I dash/bash/mksh STDOUT:
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| 240 | status=0
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| 241 | one
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| 242 | status=0
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| 243 | two
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| 244 | status=0
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| 245 | ---
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| 246 | status=0
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| 247 | one
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| 248 | status=0
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| 249 | two
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| 250 | status=0
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| 251 | ---
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| 252 | ## END
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