| 1 | ## compare_shells: bash dash mksh ash
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| 2 |
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| 3 | # OSH mechanisms:
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| 4 | #
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| 5 | # - shopt -s strict_errexit
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| 6 | # - shopt -s command_sub_errexit
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| 7 | # - inherit_errexit (bash)
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| 8 | #
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| 9 | # Summary:
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| 10 | # - local assignment is different than global! The exit code and errexit
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| 11 | # behavior are different because the concept of the "last command" is
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| 12 | # different.
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| 13 | # - ash has copied bash behavior!
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| 14 |
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| 15 | #### command sub: errexit is NOT inherited and outer shell keeps going
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| 16 |
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| 17 | # This is the bash-specific bug here:
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| 18 | # https://blogs.janestreet.com/when-bash-scripts-bite/
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| 19 | # See inherit_errexit below.
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| 20 | #
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| 21 | # I remember finding a script that relies on bash's bad behavior, so OSH copies
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| 22 | # it. But you can opt in to better behavior.
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| 23 |
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| 24 | set -o errexit
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| 25 | echo $(echo one; false; echo two) # bash/ash keep going
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| 26 | echo parent status=$?
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| 27 | ## STDOUT:
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| 28 | one two
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| 29 | parent status=0
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| 30 | ## END
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| 31 | # dash and mksh: inner shell aborts, but outer one keeps going!
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| 32 | ## OK dash/mksh STDOUT:
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| 33 | one
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| 34 | parent status=0
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| 35 | ## END
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| 36 |
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| 37 | #### command sub with inherit_errexit only
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| 38 | set -o errexit
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| 39 | shopt -s inherit_errexit || true
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| 40 | echo zero
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| 41 | echo $(echo one; false; echo two) # bash/ash keep going
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| 42 | echo parent status=$?
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| 43 | ## STDOUT:
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| 44 | zero
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| 45 | one
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| 46 | parent status=0
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| 47 | ## END
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| 48 | ## N-I ash STDOUT:
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| 49 | zero
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| 50 | one two
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| 51 | parent status=0
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| 52 | ## END
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| 53 |
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| 54 | #### strict_errexit and assignment builtins (local, export, readonly ...)
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| 55 | set -o errexit
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| 56 | shopt -s strict_errexit || true
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| 57 | #shopt -s command_sub_errexit || true
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| 58 |
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| 59 | f() {
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| 60 | local x=$(echo hi; false)
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| 61 | echo x=$x
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| 62 | }
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| 63 |
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| 64 | eval 'f'
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| 65 | echo ---
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| 66 |
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| 67 | ## status: 1
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| 68 | ## STDOUT:
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| 69 | ## END
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| 70 | ## N-I dash/bash/mksh/ash status: 0
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| 71 | ## N-I dash/bash/mksh/ash STDOUT:
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| 72 | x=hi
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| 73 | ---
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| 74 | ## END
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| 75 |
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| 76 | #### strict_errexit and command sub in export / readonly
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| 77 | case $SH in (dash|bash|mksh|ash) exit ;; esac
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| 78 |
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| 79 | $SH -o errexit -O strict_errexit -c 'echo a; export x=$(might-fail); echo b'
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| 80 | echo status=$?
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| 81 | $SH -o errexit -O strict_errexit -c 'echo a; readonly x=$(might-fail); echo b'
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| 82 | echo status=$?
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| 83 | $SH -o errexit -O strict_errexit -c 'echo a; x=$(true); echo b'
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| 84 | echo status=$?
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| 85 |
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| 86 | ## STDOUT:
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| 87 | a
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| 88 | status=1
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| 89 | a
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| 90 | status=1
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| 91 | a
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| 92 | b
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| 93 | status=0
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| 94 | ## END
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| 95 | ## N-I dash/bash/mksh/ash stdout-json: ""
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| 96 |
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| 97 |
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| 98 | #### strict_errexit disallows pipeline
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| 99 | set -o errexit
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| 100 | shopt -s strict_errexit || true
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| 101 |
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| 102 | if echo 1 | grep 1; then
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| 103 | echo one
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| 104 | fi
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| 105 |
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| 106 | ## status: 1
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| 107 | ## N-I dash/bash/mksh/ash status: 0
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| 108 | ## N-I dash/bash/mksh/ash STDOUT:
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| 109 | 1
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| 110 | one
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| 111 | ## END
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| 112 |
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| 113 | #### strict_errexit allows singleton pipeline
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| 114 | set -o errexit
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| 115 | shopt -s strict_errexit || true
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| 116 |
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| 117 | if ! false; then
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| 118 | echo yes
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| 119 | fi
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| 120 |
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| 121 | ## STDOUT:
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| 122 | yes
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| 123 | ## END
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| 124 |
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| 125 | #### strict_errexit with && || !
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| 126 | set -o errexit
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| 127 | shopt -s strict_errexit || true
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| 128 |
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| 129 | if true && true; then
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| 130 | echo A
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| 131 | fi
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| 132 |
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| 133 | if true || false; then
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| 134 | echo B
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| 135 | fi
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| 136 |
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| 137 | if ! false && ! false; then
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| 138 | echo C
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| 139 | fi
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| 140 |
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| 141 | ## STDOUT:
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| 142 | A
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| 143 | B
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| 144 | C
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| 145 | ## END
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| 146 |
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| 147 | #### strict_errexit detects proc in && || !
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| 148 | set -o errexit
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| 149 | shopt -s strict_errexit || true
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| 150 |
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| 151 | myfunc() {
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| 152 | echo 'failing'
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| 153 | false
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| 154 | echo 'should not get here'
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| 155 | }
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| 156 |
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| 157 | if true && ! myfunc; then
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| 158 | echo B
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| 159 | fi
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| 160 |
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| 161 | if ! myfunc; then
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| 162 | echo A
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| 163 | fi
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| 164 |
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| 165 | ## status: 1
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| 166 | ## STDOUT:
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| 167 | ## END
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| 168 |
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| 169 | # POSIX shell behavior:
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| 170 |
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| 171 | ## OK bash/dash/mksh/ash status: 0
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| 172 | ## OK bash/dash/mksh/ash STDOUT:
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| 173 | failing
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| 174 | should not get here
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| 175 | failing
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| 176 | should not get here
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| 177 | ## END
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| 178 |
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| 179 |
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| 180 |
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| 181 | #### strict_errexit without errexit proc
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| 182 | myproc() {
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| 183 | echo myproc
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| 184 | }
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| 185 | myproc || true
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| 186 |
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| 187 | # This should be a no-op I guess
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| 188 | shopt -s strict_errexit || true
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| 189 | myproc || true
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| 190 |
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| 191 | ## status: 1
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| 192 | ## STDOUT:
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| 193 | myproc
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| 194 | ## END
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| 195 | ## N-I dash/bash/mksh/ash status: 0
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| 196 | ## N-I dash/bash/mksh/ash STDOUT:
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| 197 | myproc
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| 198 | myproc
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| 199 | ## END
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| 200 |
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| 201 | #### strict_errexit without errexit proc / command sub
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| 202 |
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| 203 | # Implementation quirk:
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| 204 | # - The proc check happens only if errexit WAS on and is disabled
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| 205 | # - But 'shopt --unset allow_csub_psub' happens if it was never on
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| 206 |
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| 207 | shopt -s strict_errexit || true
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| 208 |
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| 209 | p() {
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| 210 | echo before
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| 211 | local x
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| 212 | # This line fails, which is a bit weird, but errexit
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| 213 | x=$(false)
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| 214 | echo x=$x
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| 215 | }
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| 216 |
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| 217 | if p; then
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| 218 | echo ok
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| 219 | fi
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| 220 |
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| 221 | ## N-I dash/bash/mksh/ash status: 0
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| 222 | ## N-I dash/bash/mksh/ash STDOUT:
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| 223 | before
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| 224 | x=
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| 225 | ok
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| 226 | ## END
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| 227 | ## status: 1
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| 228 | ## STDOUT:
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| 229 | ## END
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| 230 |
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| 231 | #### strict_errexit and errexit disabled
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| 232 | case $SH in (dash|bash|mksh|ash) exit ;; esac
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| 233 |
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| 234 | shopt -s parse_brace strict_errexit || true
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| 235 |
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| 236 | p() {
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| 237 | echo before
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| 238 | local x
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| 239 | # This line fails, which is a bit weird, but errexit
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| 240 | x=$(false)
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| 241 | echo x=$x
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| 242 | }
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| 243 |
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| 244 | set -o errexit
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| 245 | shopt --unset errexit {
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| 246 | # It runs normally here, because errexit was disabled (just not by a
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| 247 | # conditional)
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| 248 | p
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| 249 | }
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| 250 | ## N-I dash/bash/mksh/ash STDOUT:
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| 251 | ## END
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| 252 | ## STDOUT:
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| 253 | before
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| 254 | x=
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| 255 | ## END
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| 256 |
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| 257 |
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| 258 | #### command sub with command_sub_errexit only
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| 259 | set -o errexit
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| 260 | shopt -s command_sub_errexit || true
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| 261 | echo zero
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| 262 | echo $(echo one; false; echo two) # bash/ash keep going
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| 263 | echo parent status=$?
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| 264 | ## STDOUT:
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| 265 | zero
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| 266 | one two
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| 267 | parent status=0
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| 268 | ## END
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| 269 | ## N-I dash/mksh STDOUT:
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| 270 | zero
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| 271 | one
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| 272 | parent status=0
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| 273 | ## END
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| 274 |
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| 275 | #### command_sub_errexit stops at first error
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| 276 | case $SH in (dash|bash|mksh|ash) exit ;; esac
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| 277 |
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| 278 | set -o errexit
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| 279 | shopt --set parse_brace command_sub_errexit verbose_errexit || true
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| 280 |
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| 281 | rm -f BAD
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| 282 |
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| 283 | try {
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| 284 | echo $(date %d) $(touch BAD)
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| 285 | }
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| 286 | if ! test -f BAD; then # should not exist
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| 287 | echo OK
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| 288 | fi
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| 289 |
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| 290 | ## STDOUT:
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| 291 | OK
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| 292 | ## END
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| 293 | ## N-I dash/bash/mksh/ash STDOUT:
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| 294 | ## END
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| 295 |
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| 296 | #### command sub with inherit_errexit and command_sub_errexit
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| 297 | set -o errexit
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| 298 |
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| 299 | # bash implements inherit_errexit, but it's not as strict as OSH.
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| 300 | shopt -s inherit_errexit || true
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| 301 | shopt -s command_sub_errexit || true
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| 302 | echo zero
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| 303 | echo $(echo one; false; echo two) # bash/ash keep going
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| 304 | echo parent status=$?
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| 305 | ## STDOUT:
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| 306 | zero
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| 307 | ## END
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| 308 | ## status: 1
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| 309 | ## N-I dash/mksh/bash status: 0
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| 310 | ## N-I dash/mksh/bash STDOUT:
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| 311 | zero
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| 312 | one
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| 313 | parent status=0
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| 314 | ## END
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| 315 | ## N-I ash status: 0
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| 316 | ## N-I ash STDOUT:
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| 317 | zero
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| 318 | one two
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| 319 | parent status=0
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| 320 | ## END
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| 321 |
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| 322 | #### command sub: last command fails but keeps going and exit code is 0
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| 323 | set -o errexit
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| 324 | echo $(echo one; false) # we lost the exit code
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| 325 | echo status=$?
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| 326 | ## STDOUT:
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| 327 | one
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| 328 | status=0
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| 329 | ## END
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| 330 |
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| 331 | #### global assignment with command sub: middle command fails
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| 332 | set -o errexit
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| 333 | s=$(echo one; false; echo two;)
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| 334 | echo "$s"
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| 335 | ## status: 0
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| 336 | ## STDOUT:
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| 337 | one
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| 338 | two
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| 339 | ## END
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| 340 | # dash and mksh: whole thing aborts!
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| 341 | ## OK dash/mksh stdout-json: ""
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| 342 | ## OK dash/mksh status: 1
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| 343 |
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| 344 | #### global assignment with command sub: last command fails and it aborts
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| 345 | set -o errexit
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| 346 | s=$(echo one; false)
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| 347 | echo status=$?
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| 348 | ## stdout-json: ""
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| 349 | ## status: 1
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| 350 |
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| 351 | #### local: middle command fails and keeps going
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| 352 | set -o errexit
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| 353 | f() {
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| 354 | echo good
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| 355 | local x=$(echo one; false; echo two)
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| 356 | echo status=$?
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| 357 | echo $x
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| 358 | }
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| 359 | f
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| 360 | ## STDOUT:
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| 361 | good
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| 362 | status=0
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| 363 | one two
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| 364 | ## END
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| 365 | # for dash and mksh, the INNER shell aborts, but the outer one keeps going!
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| 366 | ## OK dash/mksh STDOUT:
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| 367 | good
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| 368 | status=0
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| 369 | one
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| 370 | ## END
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| 371 |
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| 372 | #### local: last command fails and also keeps going
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| 373 | set -o errexit
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| 374 | f() {
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| 375 | echo good
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| 376 | local x=$(echo one; false)
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| 377 | echo status=$?
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| 378 | echo $x
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| 379 | }
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| 380 | f
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| 381 | ## STDOUT:
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| 382 | good
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| 383 | status=0
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| 384 | one
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| 385 | ## END
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| 386 |
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| 387 | #### local and inherit_errexit / command_sub_errexit
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| 388 | # I've run into this problem a lot.
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| 389 | set -o errexit
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| 390 | shopt -s inherit_errexit || true # bash option
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| 391 | shopt -s command_sub_errexit || true # oil option
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| 392 | f() {
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| 393 | echo good
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| 394 | local x=$(echo one; false; echo two)
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| 395 | echo status=$?
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| 396 | echo $x
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| 397 | }
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| 398 | f
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| 399 | ## status: 1
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| 400 | ## STDOUT:
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| 401 | good
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| 402 | ## END
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| 403 | ## N-I ash status: 0
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| 404 | ## N-I ash STDOUT:
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| 405 | good
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| 406 | status=0
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| 407 | one two
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| 408 | ## END
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| 409 | ## N-I bash/dash/mksh status: 0
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| 410 | ## N-I bash/dash/mksh STDOUT:
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| 411 | good
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| 412 | status=0
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| 413 | one
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| 414 | ## END
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| 415 |
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| 416 | #### global assignment when last status is failure
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| 417 | # this is a bug I introduced
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| 418 | set -o errexit
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| 419 | x=$(false) || true # from abuild
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| 420 | [ -n "$APORTSDIR" ] && true
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| 421 | BUILDDIR=${_BUILDDIR-$BUILDDIR}
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| 422 | echo status=$?
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| 423 | ## STDOUT:
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| 424 | status=0
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| 425 | ## END
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| 426 |
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| 427 | #### strict_errexit prevents errexit from being disabled in function
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| 428 | set -o errexit
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| 429 | fun() { echo fun; }
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| 430 |
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| 431 | fun || true # this is OK
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| 432 |
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| 433 | shopt -s strict_errexit || true
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| 434 |
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| 435 | echo 'builtin ok' || true
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| 436 | env echo 'external ok' || true
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| 437 |
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| 438 | fun || true # this fails
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| 439 |
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| 440 | ## status: 1
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| 441 | ## STDOUT:
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| 442 | fun
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| 443 | builtin ok
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| 444 | external ok
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| 445 | ## END
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| 446 | ## N-I dash/bash/mksh/ash status: 0
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| 447 | ## N-I dash/bash/mksh/ash STDOUT:
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| 448 | fun
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| 449 | builtin ok
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| 450 | external ok
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| 451 | fun
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| 452 | ## END
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| 453 |
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| 454 | #### strict_errexit prevents errexit from being disabled in brace group
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| 455 | set -o errexit
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| 456 | # false failure is NOT respected either way
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| 457 | { echo foo; false; echo bar; } || echo "failed"
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| 458 |
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| 459 | shopt -s strict_errexit || true
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| 460 | { echo foo; false; echo bar; } || echo "failed"
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| 461 | ## status: 1
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| 462 | ## STDOUT:
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| 463 | foo
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| 464 | bar
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| 465 | ## END
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| 466 |
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| 467 | ## N-I dash/bash/mksh/ash status: 0
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| 468 | ## N-I dash/bash/mksh/ash STDOUT:
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| 469 | foo
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| 470 | bar
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| 471 | foo
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| 472 | bar
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| 473 | ## END
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| 474 |
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| 475 | #### strict_errexit prevents errexit from being disabled in subshell
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| 476 | set -o errexit
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| 477 | shopt -s inherit_errexit || true
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| 478 |
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| 479 | # false failure is NOT respected either way
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| 480 | ( echo foo; false; echo bar; ) || echo "failed"
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| 481 |
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| 482 | shopt -s strict_errexit || true
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| 483 | ( echo foo; false; echo bar; ) || echo "failed"
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| 484 | ## status: 1
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| 485 | ## STDOUT:
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| 486 | foo
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| 487 | bar
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| 488 | ## END
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| 489 |
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| 490 | ## N-I dash/bash/mksh/ash status: 0
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| 491 | ## N-I dash/bash/mksh/ash STDOUT:
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| 492 | foo
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| 493 | bar
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| 494 | foo
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| 495 | bar
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| 496 | ## END
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| 497 |
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| 498 | #### strict_errexit and ! && || if while until
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| 499 | prelude='set -o errexit
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| 500 | shopt -s strict_errexit || true
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| 501 | fun() { echo fun; }'
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| 502 |
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| 503 | $SH -c "$prelude; ! fun; echo 'should not get here'"
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| 504 | echo bang=$?
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| 505 | echo --
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| 506 |
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| 507 | $SH -c "$prelude; fun || true"
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| 508 | echo or=$?
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| 509 | echo --
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| 510 |
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| 511 | $SH -c "$prelude; fun && true"
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| 512 | echo and=$?
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| 513 | echo --
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| 514 |
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| 515 | $SH -c "$prelude; if fun; then true; fi"
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| 516 | echo if=$?
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| 517 | echo --
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| 518 |
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| 519 | $SH -c "$prelude; while fun; do echo while; exit; done"
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| 520 | echo while=$?
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| 521 | echo --
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| 522 |
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| 523 | $SH -c "$prelude; until fun; do echo until; exit; done"
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| 524 | echo until=$?
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| 525 | echo --
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| 526 |
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| 527 |
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| 528 | ## STDOUT:
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| 529 | bang=1
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| 530 | --
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| 531 | or=1
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| 532 | --
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| 533 | and=1
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| 534 | --
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| 535 | if=1
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| 536 | --
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| 537 | while=1
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| 538 | --
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| 539 | until=1
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| 540 | --
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| 541 | ## END
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| 542 | ## N-I dash/bash/mksh/ash STDOUT:
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| 543 | fun
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| 544 | should not get here
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| 545 | bang=0
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| 546 | --
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| 547 | fun
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| 548 | or=0
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| 549 | --
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| 550 | fun
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| 551 | and=0
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| 552 | --
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| 553 | fun
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| 554 | if=0
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| 555 | --
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| 556 | fun
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| 557 | while
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| 558 | while=0
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| 559 | --
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| 560 | fun
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| 561 | until=0
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| 562 | --
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| 563 | ## END
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| 564 |
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| 565 | #### if pipeline doesn't fail fatally
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| 566 | set -o errexit
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| 567 | set -o pipefail
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| 568 |
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| 569 | f() {
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| 570 | local dir=$1
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| 571 | if ls $dir | grep ''; then
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| 572 | echo foo
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| 573 | echo ${PIPESTATUS[@]}
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| 574 | fi
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| 575 | }
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| 576 | rmdir $TMP/_tmp || true
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| 577 | rm -f $TMP/*
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| 578 | f $TMP
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| 579 | f /nonexistent # should fail
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| 580 | echo done
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| 581 |
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| 582 | ## N-I dash status: 2
|
| 583 | ## N-I dash stdout-json: ""
|
| 584 | ## STDOUT:
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| 585 | done
|
| 586 | ## END
|
| 587 |
|
| 588 | #### errexit is silent (verbose_errexit for Oil)
|
| 589 | shopt -u verbose_errexit 2>/dev/null || true
|
| 590 | set -e
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| 591 | false
|
| 592 | ## stderr-json: ""
|
| 593 | ## status: 1
|
| 594 |
|
| 595 | #### command sub errexit preserves exit code
|
| 596 | set -e
|
| 597 | shopt -s command_sub_errexit || true
|
| 598 |
|
| 599 | echo before
|
| 600 | echo $(exit 42)
|
| 601 | echo after
|
| 602 | ## STDOUT:
|
| 603 | before
|
| 604 | ## END
|
| 605 | ## status: 42
|
| 606 | ## N-I dash/bash/mksh/ash STDOUT:
|
| 607 | before
|
| 608 |
|
| 609 | after
|
| 610 | ## N-I dash/bash/mksh/ash status: 0
|
| 611 |
|
| 612 | #### What's in strict:all?
|
| 613 |
|
| 614 | # inherit_errexit, strict_errexit, but not command_sub_errexit!
|
| 615 | # for that you need oil:upgrade!
|
| 616 |
|
| 617 | set -o errexit
|
| 618 | shopt -s strict:all || true
|
| 619 |
|
| 620 | # inherit_errexit is bash compatible, so we have it
|
| 621 | #echo $(date %x)
|
| 622 |
|
| 623 | # command_sub_errexit would hide errors!
|
| 624 | f() {
|
| 625 | local d=$(date %x)
|
| 626 | }
|
| 627 | f
|
| 628 |
|
| 629 | deploy_func() {
|
| 630 | echo one
|
| 631 | false
|
| 632 | echo two
|
| 633 | }
|
| 634 |
|
| 635 | if ! deploy_func; then
|
| 636 | echo failed
|
| 637 | fi
|
| 638 |
|
| 639 | echo 'should not get here'
|
| 640 |
|
| 641 | ## status: 1
|
| 642 | ## STDOUT:
|
| 643 | ## END
|
| 644 | ## N-I dash/bash/mksh/ash status: 0
|
| 645 | ## N-I dash/bash/mksh/ash STDOUT:
|
| 646 | one
|
| 647 | two
|
| 648 | should not get here
|
| 649 | ## END
|
| 650 |
|
| 651 | #### command_sub_errexit causes local d=$(date %x) to fail
|
| 652 | set -o errexit
|
| 653 | shopt -s inherit_errexit || true
|
| 654 | #shopt -s strict_errexit || true
|
| 655 | shopt -s command_sub_errexit || true
|
| 656 |
|
| 657 | myproc() {
|
| 658 | # this is disallowed because we want a runtime error 100% of the time
|
| 659 | local x=$(true)
|
| 660 |
|
| 661 | # Realistic example. Should fail here but shells don't!
|
| 662 | local d=$(date %x)
|
| 663 | echo hi
|
| 664 | }
|
| 665 | myproc
|
| 666 |
|
| 667 | ## status: 1
|
| 668 | ## STDOUT:
|
| 669 | ## END
|
| 670 | ## N-I dash/bash/mksh/ash status: 0
|
| 671 | ## N-I dash/bash/mksh/ash STDOUT:
|
| 672 | hi
|
| 673 | ## END
|
| 674 |
|
| 675 | #### command_sub_errexit and command sub in array
|
| 676 | case $SH in (dash|ash|mksh) exit ;; esac
|
| 677 |
|
| 678 | set -o errexit
|
| 679 | shopt -s inherit_errexit || true
|
| 680 | #shopt -s strict_errexit || true
|
| 681 | shopt -s command_sub_errexit || true
|
| 682 |
|
| 683 | # We don't want silent failure here
|
| 684 | readonly -a myarray=( one "$(date %x)" two )
|
| 685 |
|
| 686 | #echo len=${#myarray[@]}
|
| 687 | argv.py "${myarray[@]}"
|
| 688 | ## status: 1
|
| 689 | ## STDOUT:
|
| 690 | ## END
|
| 691 | ## N-I bash status: 0
|
| 692 | ## N-I bash STDOUT:
|
| 693 | ['one', '', 'two']
|
| 694 | ## END
|
| 695 | ## N-I dash/ash/mksh status: 0
|
| 696 |
|
| 697 | #### OLD: command sub in conditional, with inherit_errexit
|
| 698 | set -o errexit
|
| 699 | shopt -s inherit_errexit || true
|
| 700 | if echo $(echo 1; false; echo 2); then
|
| 701 | echo A
|
| 702 | fi
|
| 703 | echo done
|
| 704 |
|
| 705 | ## STDOUT:
|
| 706 | 1 2
|
| 707 | A
|
| 708 | done
|
| 709 | ## END
|
| 710 | ## N-I dash/mksh STDOUT:
|
| 711 | 1
|
| 712 | A
|
| 713 | done
|
| 714 | ## END
|
| 715 |
|
| 716 | #### OLD: command sub in redirect in conditional
|
| 717 | set -o errexit
|
| 718 |
|
| 719 | if echo tmp_contents > $(echo tmp); then
|
| 720 | echo 2
|
| 721 | fi
|
| 722 | cat tmp
|
| 723 | ## STDOUT:
|
| 724 | 2
|
| 725 | tmp_contents
|
| 726 | ## END
|
| 727 |
|
| 728 | #### Regression
|
| 729 | case $SH in (bash|dash|ash|mksh) exit ;; esac
|
| 730 |
|
| 731 | shopt --set oil:upgrade
|
| 732 |
|
| 733 | shopt --unset errexit {
|
| 734 | echo hi
|
| 735 | }
|
| 736 |
|
| 737 | proc p {
|
| 738 | echo p
|
| 739 | }
|
| 740 |
|
| 741 | shopt --unset errexit {
|
| 742 | p
|
| 743 | }
|
| 744 | ## STDOUT:
|
| 745 | hi
|
| 746 | p
|
| 747 | ## END
|
| 748 | ## N-I bash/dash/ash/mksh stdout-json: ""
|
| 749 |
|
| 750 | #### ShAssignment used as conditional
|
| 751 |
|
| 752 | while x=$(false)
|
| 753 | do
|
| 754 | echo while
|
| 755 | done
|
| 756 |
|
| 757 | if x=$(false)
|
| 758 | then
|
| 759 | echo if
|
| 760 | fi
|
| 761 |
|
| 762 | if x=$(true)
|
| 763 | then
|
| 764 | echo yes
|
| 765 | fi
|
| 766 |
|
| 767 | # Same thing with errexit -- NOT affected
|
| 768 | set -o errexit
|
| 769 |
|
| 770 | while x=$(false)
|
| 771 | do
|
| 772 | echo while
|
| 773 | done
|
| 774 |
|
| 775 | if x=$(false)
|
| 776 | then
|
| 777 | echo if
|
| 778 | fi
|
| 779 |
|
| 780 | if x=$(true)
|
| 781 | then
|
| 782 | echo yes
|
| 783 | fi
|
| 784 |
|
| 785 | # Same thing with strict_errexit -- NOT affected
|
| 786 | shopt -s strict_errexit || true
|
| 787 |
|
| 788 | while x=$(false)
|
| 789 | do
|
| 790 | echo while
|
| 791 | done
|
| 792 |
|
| 793 | if x=$(false)
|
| 794 | then
|
| 795 | echo if
|
| 796 | fi
|
| 797 |
|
| 798 | if x=$(true)
|
| 799 | then
|
| 800 | echo yes
|
| 801 | fi
|
| 802 |
|
| 803 | ## status: 1
|
| 804 | ## STDOUT:
|
| 805 | yes
|
| 806 | yes
|
| 807 | ## END
|
| 808 | ## N-I dash/bash/mksh/ash status: 0
|
| 809 | ## N-I dash/bash/mksh/ash STDOUT:
|
| 810 | yes
|
| 811 | yes
|
| 812 | yes
|
| 813 | ## END
|