| 1 | ## oils_failures_allowed: 4
|
| 2 | ## compare_shells: dash bash-4.4 mksh zsh
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| 3 |
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| 4 |
|
| 5 | # NOTE:
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| 6 | # - $! is tested in background.test.sh
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| 7 | # - $- is tested in sh-options
|
| 8 | #
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| 9 | # TODO: It would be nice to make a table, like:
|
| 10 | #
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| 11 | # $$ $BASHPID $PPID $SHLVL $BASH_SUBSHELL
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| 12 | # X
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| 13 | # (Subshell, Command Sub, Pipeline, Spawn $0)
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| 14 | #
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| 15 | # And see whether the variable changed.
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| 16 |
|
| 17 | #### $PWD is set
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| 18 | # Just test that it has a slash for now.
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| 19 | echo $PWD | grep /
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| 20 | ## status: 0
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| 21 |
|
| 22 | #### $PWD is not only set, but exported
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| 23 | env | grep PWD
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| 24 | ## status: 0
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| 25 | ## BUG mksh status: 1
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| 26 |
|
| 27 | #### $PATH is set if unset at startup
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| 28 |
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| 29 | # WORKAROUND for Python version of bin/osh -- we can't run bin/oils_for_unix.py
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| 30 | # because it a shebang #!/usr/bin/env python2
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| 31 | # This test is still useful for the C++ oils-for-unix.
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| 32 |
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| 33 | case $SH in
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| 34 | */bin/osh)
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| 35 | echo yes
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| 36 | echo yes
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| 37 | exit
|
| 38 | ;;
|
| 39 | esac
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| 40 |
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| 41 | # Get absolute path before changing PATH
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| 42 | sh=$(which $SH)
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| 43 |
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| 44 | old_path=$PATH
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| 45 | unset PATH
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| 46 |
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| 47 | $sh -c 'echo $PATH' > path.txt
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| 48 |
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| 49 | PATH=$old_path
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| 50 |
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| 51 | # looks like PATH=/usr/bin:/bin for mksh, but more complicated for others
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| 52 | # cat path.txt
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| 53 |
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| 54 | # should contain /usr/bin
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| 55 | if egrep -q '(^|:)/usr/bin($|:)' path.txt; then
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| 56 | echo yes
|
| 57 | fi
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| 58 |
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| 59 | # should contain /bin
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| 60 | if egrep -q '(^|:)/bin($|:)' path.txt ; then
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| 61 | echo yes
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| 62 | fi
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| 63 |
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| 64 | ## STDOUT:
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| 65 | yes
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| 66 | yes
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| 67 | ## END
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| 68 |
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| 69 | #### $HOME is NOT set
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| 70 | case $SH in *zsh) echo 'zsh sets HOME'; exit ;; esac
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| 71 |
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| 72 | home=$(echo $HOME)
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| 73 | test "$home" = ""
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| 74 | echo status=$?
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| 75 |
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| 76 | env | grep HOME
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| 77 | echo status=$?
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| 78 |
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| 79 | # not in interactive shell either
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| 80 | $SH -i -c 'echo $HOME' | grep /
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| 81 | echo status=$?
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| 82 |
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| 83 | ## STDOUT:
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| 84 | status=0
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| 85 | status=1
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| 86 | status=1
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| 87 | ## END
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| 88 | ## BUG zsh STDOUT:
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| 89 | zsh sets HOME
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| 90 | ## END
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| 91 |
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| 92 | #### Vars set interactively only: $HISTFILE
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| 93 | case $SH in dash|mksh|zsh) exit ;; esac
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| 94 |
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| 95 | $SH --norc --rcfile /dev/null -c 'echo histfile=${HISTFILE:+yes}'
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| 96 | $SH --norc --rcfile /dev/null -i -c 'echo histfile=${HISTFILE:+yes}'
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| 97 |
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| 98 | ## STDOUT:
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| 99 | histfile=
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| 100 | histfile=yes
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| 101 | ## END
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| 102 |
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| 103 | ## N-I dash/mksh/zsh STDOUT:
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| 104 | ## END
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| 105 |
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| 106 | #### Some vars are set, even without startup file, or env: PATH, PWD
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| 107 |
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| 108 | flags=''
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| 109 | case $SH in
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| 110 | dash) exit ;;
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| 111 | bash*)
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| 112 | flags='--noprofile --norc --rcfile /devnull'
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| 113 | ;;
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| 114 | osh)
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| 115 | flags='--rcfile /devnull'
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| 116 | ;;
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| 117 | esac
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| 118 |
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| 119 | sh_path=$(which $SH)
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| 120 |
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| 121 | case $sh_path in
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| 122 | */bin/osh)
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| 123 | # Hack for running with Python2
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| 124 | export PYTHONPATH="$REPO_ROOT:$REPO_ROOT/vendor"
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| 125 | sh_prefix="$(which python2) $REPO_ROOT/bin/oils_for_unix.py osh"
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| 126 | ;;
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| 127 | *)
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| 128 | sh_prefix=$sh_path
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| 129 | ;;
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| 130 | esac
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| 131 |
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| 132 | #echo PATH=$PATH
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| 133 |
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| 134 |
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| 135 | # mksh has typeset, not declare
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| 136 | # bash exports PWD, but not PATH PS4
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| 137 |
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| 138 | /usr/bin/env -i PYTHONPATH=$PYTHONPATH $sh_prefix $flags -c 'typeset -p PATH PWD PS4' >&2
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| 139 | echo path pwd ps4 $?
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| 140 |
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| 141 | /usr/bin/env -i PYTHONPATH=$PYTHONPATH $sh_prefix $flags -c 'typeset -p SHELLOPTS' >&2
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| 142 | echo shellopts $?
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| 143 |
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| 144 | # bash doesn't set HOME, mksh and zsh do
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| 145 | /usr/bin/env -i PYTHONPATH=$PYTHONPATH $sh_prefix $flags -c 'typeset -p HOME PS4' >&2
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| 146 | echo home ps1 $?
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| 147 |
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| 148 | # bash doesn't set PS1, mksh and zsh do
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| 149 | /usr/bin/env -i PYTHONPATH=$PYTHONPATH $sh_prefix $flags -c 'typeset -p IFS' >&2
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| 150 | echo ifs $?
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| 151 |
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| 152 | ## STDOUT:
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| 153 | path pwd ps4 0
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| 154 | shellopts 0
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| 155 | home ps1 1
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| 156 | ifs 0
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| 157 | ## END
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| 158 |
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| 159 | ## OK mksh STDOUT:
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| 160 | path pwd ps4 0
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| 161 | shellopts 0
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| 162 | home ps1 0
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| 163 | ifs 0
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| 164 | ## END
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| 165 |
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| 166 | ## OK zsh STDOUT:
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| 167 | path pwd ps4 0
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| 168 | shellopts 1
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| 169 | home ps1 0
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| 170 | ifs 0
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| 171 | ## END
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| 172 |
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| 173 | ## N-I dash STDOUT:
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| 174 | ## END
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| 175 |
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| 176 | #### UID EUID PPID can't be changed
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| 177 |
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| 178 | # bash makes these 3 read-only
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| 179 | {
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| 180 | UID=xx $SH -c 'echo uid=$UID'
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| 181 |
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| 182 | EUID=xx $SH -c 'echo euid=$EUID'
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| 183 |
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| 184 | PPID=xx $SH -c 'echo ppid=$PPID'
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| 185 |
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| 186 | } > out.txt
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| 187 |
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| 188 | # bash shows that vars are readonly
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| 189 | # zsh shows other errors
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| 190 | # cat out.txt
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| 191 | #echo
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| 192 |
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| 193 | grep '=xx' out.txt
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| 194 | echo status=$?
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| 195 |
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| 196 | ## STDOUT:
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| 197 | status=1
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| 198 | ## END
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| 199 | ## BUG dash/mksh STDOUT:
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| 200 | uid=xx
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| 201 | euid=xx
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| 202 | status=0
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| 203 | ## END
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| 204 |
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| 205 | #### HOSTNAME OSTYPE can be changed
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| 206 | case $SH in zsh) exit ;; esac
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| 207 |
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| 208 | #$SH -c 'echo hostname=$HOSTNAME'
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| 209 |
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| 210 | HOSTNAME=x $SH -c 'echo hostname=$HOSTNAME'
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| 211 | OSTYPE=x $SH -c 'echo ostype=$OSTYPE'
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| 212 | echo
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| 213 |
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| 214 | #PS4=x $SH -c 'echo ps4=$PS4'
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| 215 |
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| 216 | # OPTIND is special
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| 217 | #OPTIND=xx $SH -c 'echo optind=$OPTIND'
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| 218 |
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| 219 |
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| 220 | ## STDOUT:
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| 221 | hostname=x
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| 222 | ostype=x
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| 223 |
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| 224 | ## END
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| 225 |
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| 226 | ## BUG zsh STDOUT:
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| 227 | ## END
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| 228 |
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| 229 |
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| 230 | #### $1 .. $9 are scoped, while $0 is not
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| 231 | fun() {
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| 232 | echo $0 | grep -o 'sh'
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| 233 | echo $1 $2
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| 234 | }
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| 235 | fun a b
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| 236 |
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| 237 | ## STDOUT:
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| 238 | sh
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| 239 | a b
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| 240 | ## END
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| 241 | ## BUG zsh STDOUT:
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| 242 | a b
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| 243 | ## END
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| 244 |
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| 245 | #### $?
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| 246 | echo $? # starts out as 0
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| 247 | sh -c 'exit 33'
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| 248 | echo $?
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| 249 | ## STDOUT:
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| 250 | 0
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| 251 | 33
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| 252 | ## END
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| 253 | ## status: 0
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| 254 |
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| 255 | #### $#
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| 256 | set -- 1 2 3 4
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| 257 | echo $#
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| 258 | ## stdout: 4
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| 259 | ## status: 0
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| 260 |
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| 261 | #### $$ looks like a PID
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| 262 | # Just test that it has decimal digits
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| 263 | echo $$ | egrep '[0-9]+'
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| 264 | ## status: 0
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| 265 |
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| 266 | #### $$ doesn't change with subshell or command sub
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| 267 | # Just test that it has decimal digits
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| 268 | set -o errexit
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| 269 | die() {
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| 270 | echo 1>&2 "$@"; exit 1
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| 271 | }
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| 272 | parent=$$
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| 273 | test -n "$parent" || die "empty PID in parent"
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| 274 | ( child=$$
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| 275 | test -n "$child" || die "empty PID in subshell"
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| 276 | test "$parent" = "$child" || die "should be equal: $parent != $child"
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| 277 | echo 'subshell OK'
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| 278 | )
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| 279 | echo $( child=$$
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| 280 | test -n "$child" || die "empty PID in command sub"
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| 281 | test "$parent" = "$child" || die "should be equal: $parent != $child"
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| 282 | echo 'command sub OK'
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| 283 | )
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| 284 | exit 3 # make sure we got here
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| 285 | ## status: 3
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| 286 | ## STDOUT:
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| 287 | subshell OK
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| 288 | command sub OK
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| 289 | ## END
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| 290 |
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| 291 | #### $BASHPID DOES change with subshell and command sub
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| 292 | set -o errexit
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| 293 | die() {
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| 294 | echo 1>&2 "$@"; exit 1
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| 295 | }
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| 296 | parent=$BASHPID
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| 297 | test -n "$parent" || die "empty BASHPID in parent"
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| 298 | ( child=$BASHPID
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| 299 | test -n "$child" || die "empty BASHPID in subshell"
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| 300 | test "$parent" != "$child" || die "should not be equal: $parent = $child"
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| 301 | echo 'subshell OK'
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| 302 | )
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| 303 | echo $( child=$BASHPID
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| 304 | test -n "$child" || die "empty BASHPID in command sub"
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| 305 | test "$parent" != "$child" ||
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| 306 | die "should not be equal: $parent = $child"
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| 307 | echo 'command sub OK'
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| 308 | )
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| 309 | exit 3 # make sure we got here
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| 310 |
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| 311 | # mksh also implements BASHPID!
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| 312 |
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| 313 | ## status: 3
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| 314 | ## STDOUT:
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| 315 | subshell OK
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| 316 | command sub OK
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| 317 | ## END
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| 318 | ## N-I dash/zsh status: 1
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| 319 | ## N-I dash/zsh stdout-json: ""
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| 320 |
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| 321 | #### Background PID $! looks like a PID
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| 322 | sleep 0.01 &
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| 323 | pid=$!
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| 324 | wait
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| 325 | echo $pid | egrep '[0-9]+' >/dev/null
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| 326 | echo status=$?
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| 327 | ## stdout: status=0
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| 328 |
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| 329 | #### $PPID
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| 330 | echo $PPID | egrep '[0-9]+'
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| 331 | ## status: 0
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| 332 |
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| 333 | # NOTE: There is also $BASHPID
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| 334 |
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| 335 | #### $PIPESTATUS
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| 336 | echo hi | sh -c 'cat; exit 33' | wc -l >/dev/null
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| 337 | argv.py "${PIPESTATUS[@]}"
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| 338 | ## status: 0
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| 339 | ## STDOUT:
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| 340 | ['0', '33', '0']
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| 341 | ## END
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| 342 | ## N-I dash stdout-json: ""
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| 343 | ## N-I dash status: 2
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| 344 | ## N-I zsh STDOUT:
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| 345 | ['']
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| 346 | ## END
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| 347 |
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| 348 | #### $RANDOM
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| 349 | expr $0 : '.*/osh$' && exit 99 # Disabled because of spec-runner.sh issue
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| 350 | echo $RANDOM | egrep '[0-9]+'
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| 351 | ## status: 0
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| 352 | ## N-I dash status: 1
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| 353 |
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| 354 | #### $UID and $EUID
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| 355 | # These are both bash-specific.
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| 356 | set -o errexit
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| 357 | echo $UID | egrep -o '[0-9]+' >/dev/null
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| 358 | echo $EUID | egrep -o '[0-9]+' >/dev/null
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| 359 | echo status=$?
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| 360 | ## stdout: status=0
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| 361 | ## N-I dash/mksh stdout-json: ""
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| 362 | ## N-I dash/mksh status: 1
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| 363 |
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| 364 | #### $OSTYPE is non-empty
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| 365 | test -n "$OSTYPE"
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| 366 | echo status=$?
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| 367 | ## STDOUT:
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| 368 | status=0
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| 369 | ## END
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| 370 | ## N-I dash/mksh STDOUT:
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| 371 | status=1
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| 372 | ## END
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| 373 |
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| 374 | #### $HOSTNAME
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| 375 | test "$HOSTNAME" = "$(hostname)"
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| 376 | echo status=$?
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| 377 | ## STDOUT:
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| 378 | status=0
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| 379 | ## END
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| 380 | ## N-I dash/mksh/zsh STDOUT:
|
| 381 | status=1
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| 382 | ## END
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| 383 |
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| 384 | #### $LINENO is the current line, not line of function call
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| 385 | echo $LINENO # first line
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| 386 | g() {
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| 387 | argv.py $LINENO # line 3
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| 388 | }
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| 389 | f() {
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| 390 | argv.py $LINENO # line 6
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| 391 | g
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| 392 | argv.py $LINENO # line 8
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| 393 | }
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| 394 | f
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| 395 | ## STDOUT:
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| 396 | 1
|
| 397 | ['6']
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| 398 | ['3']
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| 399 | ['8']
|
| 400 | ## END
|
| 401 | ## BUG zsh STDOUT:
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| 402 | 1
|
| 403 | ['1']
|
| 404 | ['1']
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| 405 | ['3']
|
| 406 | ## END
|
| 407 | ## BUG dash STDOUT:
|
| 408 | 1
|
| 409 | ['2']
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| 410 | ['2']
|
| 411 | ['4']
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| 412 | ## END
|
| 413 |
|
| 414 | #### $LINENO in "bare" redirect arg (bug regression)
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| 415 | filename=$TMP/bare3
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| 416 | rm -f $filename
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| 417 | > $TMP/bare$LINENO
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| 418 | test -f $filename && echo written
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| 419 | echo $LINENO
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| 420 | ## STDOUT:
|
| 421 | written
|
| 422 | 5
|
| 423 | ## END
|
| 424 | ## BUG zsh STDOUT:
|
| 425 | ## END
|
| 426 |
|
| 427 | #### $LINENO in redirect arg (bug regression)
|
| 428 | filename=$TMP/lineno_regression3
|
| 429 | rm -f $filename
|
| 430 | echo x > $TMP/lineno_regression$LINENO
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| 431 | test -f $filename && echo written
|
| 432 | echo $LINENO
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| 433 | ## STDOUT:
|
| 434 | written
|
| 435 | 5
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| 436 | ## END
|
| 437 |
|
| 438 | #### $LINENO in [[
|
| 439 | echo one
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| 440 | [[ $LINENO -eq 2 ]] && echo OK
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| 441 | ## STDOUT:
|
| 442 | one
|
| 443 | OK
|
| 444 | ## END
|
| 445 | ## N-I dash status: 127
|
| 446 | ## N-I dash stdout: one
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| 447 | ## N-I mksh status: 1
|
| 448 | ## N-I mksh stdout: one
|
| 449 |
|
| 450 | #### $LINENO in ((
|
| 451 | echo one
|
| 452 | (( x = LINENO ))
|
| 453 | echo $x
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| 454 | ## STDOUT:
|
| 455 | one
|
| 456 | 2
|
| 457 | ## END
|
| 458 | ## N-I dash stdout-json: "one\n\n"
|
| 459 |
|
| 460 | #### $LINENO in for loop
|
| 461 | # hm bash doesn't take into account the word break. That's OK; we won't either.
|
| 462 | echo one
|
| 463 | for x in \
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| 464 | $LINENO zzz; do
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| 465 | echo $x
|
| 466 | done
|
| 467 | ## STDOUT:
|
| 468 | one
|
| 469 | 2
|
| 470 | zzz
|
| 471 | ## END
|
| 472 | ## OK mksh STDOUT:
|
| 473 | one
|
| 474 | 1
|
| 475 | zzz
|
| 476 | ## END
|
| 477 |
|
| 478 | #### $LINENO in other for loops
|
| 479 | set -- a b c
|
| 480 | for x; do
|
| 481 | echo $LINENO $x
|
| 482 | done
|
| 483 | ## STDOUT:
|
| 484 | 3 a
|
| 485 | 3 b
|
| 486 | 3 c
|
| 487 | ## END
|
| 488 |
|
| 489 | #### $LINENO in for (( loop
|
| 490 | # This is a real edge case that I'm not sure we care about. We would have to
|
| 491 | # change the span ID inside the loop to make it really correct.
|
| 492 | echo one
|
| 493 | for (( i = 0; i < $LINENO; i++ )); do
|
| 494 | echo $i
|
| 495 | done
|
| 496 | ## STDOUT:
|
| 497 | one
|
| 498 | 0
|
| 499 | 1
|
| 500 | ## END
|
| 501 | ## N-I dash stdout: one
|
| 502 | ## N-I dash status: 2
|
| 503 | ## BUG mksh stdout: one
|
| 504 | ## BUG mksh status: 1
|
| 505 |
|
| 506 | #### $LINENO for assignment
|
| 507 | a1=$LINENO a2=$LINENO
|
| 508 | b1=$LINENO b2=$LINENO
|
| 509 | echo $a1 $a2
|
| 510 | echo $b1 $b2
|
| 511 | ## STDOUT:
|
| 512 | 1 1
|
| 513 | 2 2
|
| 514 | ## END
|
| 515 |
|
| 516 | #### $LINENO in case
|
| 517 | case $LINENO in
|
| 518 | 1) echo 'got line 1' ;;
|
| 519 | *) echo line=$LINENO
|
| 520 | esac
|
| 521 | ## STDOUT:
|
| 522 | got line 1
|
| 523 | ## END
|
| 524 | ## BUG mksh STDOUT:
|
| 525 | line=3
|
| 526 | ## END
|
| 527 |
|
| 528 | #### $_ with simple command and evaluation
|
| 529 |
|
| 530 | name=world
|
| 531 | echo "hi $name"
|
| 532 | echo "$_"
|
| 533 | ## STDOUT:
|
| 534 | hi world
|
| 535 | hi world
|
| 536 | ## END
|
| 537 | ## N-I dash/mksh STDOUT:
|
| 538 | hi world
|
| 539 |
|
| 540 | ## END
|
| 541 |
|
| 542 | #### $_ and ${_}
|
| 543 | case $SH in (dash|mksh) exit ;; esac
|
| 544 |
|
| 545 | _var=value
|
| 546 |
|
| 547 | : 42
|
| 548 | echo $_ $_var ${_}var
|
| 549 |
|
| 550 | : 'foo'"bar"
|
| 551 | echo $_
|
| 552 |
|
| 553 | ## STDOUT:
|
| 554 | 42 value 42var
|
| 555 | foobar
|
| 556 | ## END
|
| 557 | ## N-I dash/mksh stdout-json: ""
|
| 558 |
|
| 559 | #### $_ with word splitting
|
| 560 | case $SH in (dash|mksh) exit ;; esac
|
| 561 |
|
| 562 | setopt shwordsplit # for ZSH
|
| 563 |
|
| 564 | x='with spaces'
|
| 565 | : $x
|
| 566 | echo $_
|
| 567 |
|
| 568 | ## STDOUT:
|
| 569 | spaces
|
| 570 | ## END
|
| 571 | ## N-I dash/mksh stdout-json: ""
|
| 572 |
|
| 573 | #### $_ with pipeline and subshell
|
| 574 | case $SH in (dash|mksh) exit ;; esac
|
| 575 |
|
| 576 | shopt -s lastpipe
|
| 577 |
|
| 578 | seq 3 | echo last=$_
|
| 579 |
|
| 580 | echo pipeline=$_
|
| 581 |
|
| 582 | ( echo subshell=$_ )
|
| 583 | echo done=$_
|
| 584 |
|
| 585 | ## STDOUT:
|
| 586 | last=
|
| 587 | pipeline=last=
|
| 588 | subshell=pipeline=last=
|
| 589 | done=pipeline=last=
|
| 590 | ## END
|
| 591 |
|
| 592 | # very weird semantics for zsh!
|
| 593 | ## OK zsh STDOUT:
|
| 594 | last=3
|
| 595 | pipeline=last=3
|
| 596 | subshell=
|
| 597 | done=
|
| 598 | ## END
|
| 599 |
|
| 600 | ## N-I dash/mksh stdout-json: ""
|
| 601 |
|
| 602 |
|
| 603 | #### $_ with && and ||
|
| 604 | case $SH in (dash|mksh) exit ;; esac
|
| 605 |
|
| 606 | echo hi && echo last=$_
|
| 607 | echo and=$_
|
| 608 |
|
| 609 | echo hi || echo last=$_
|
| 610 | echo or=$_
|
| 611 |
|
| 612 | ## STDOUT:
|
| 613 | hi
|
| 614 | last=hi
|
| 615 | and=last=hi
|
| 616 | hi
|
| 617 | or=hi
|
| 618 | ## END
|
| 619 |
|
| 620 | ## N-I dash/mksh stdout-json: ""
|
| 621 |
|
| 622 | #### $_ is not reset with (( and [[
|
| 623 |
|
| 624 | # bash is inconsistent because it does it for pipelines and assignments, but
|
| 625 | # not (( and [[
|
| 626 |
|
| 627 | case $SH in (dash|mksh) exit ;; esac
|
| 628 |
|
| 629 | echo simple
|
| 630 | (( a = 2 + 3 ))
|
| 631 | echo "(( $_"
|
| 632 |
|
| 633 | [[ a == *.py ]]
|
| 634 | echo "[[ $_"
|
| 635 |
|
| 636 | ## STDOUT:
|
| 637 | simple
|
| 638 | (( simple
|
| 639 | [[ (( simple
|
| 640 | ## END
|
| 641 |
|
| 642 | ## N-I dash/mksh stdout-json: ""
|
| 643 |
|
| 644 |
|
| 645 | #### $_ with assignments, arrays, etc.
|
| 646 | case $SH in (dash|mksh) exit ;; esac
|
| 647 |
|
| 648 | : foo
|
| 649 | echo "colon [$_]"
|
| 650 |
|
| 651 | s=bar
|
| 652 | echo "bare assign [$_]"
|
| 653 |
|
| 654 | # zsh uses declare; bash uses s=bar
|
| 655 | declare s=bar
|
| 656 | echo "declare [$_]"
|
| 657 |
|
| 658 | # zsh remains s:declare, bash resets it
|
| 659 | a=(1 2)
|
| 660 | echo "array [$_]"
|
| 661 |
|
| 662 | # zsh sets it to declare, bash uses the LHS a
|
| 663 | declare a=(1 2)
|
| 664 | echo "declare array [$_]"
|
| 665 |
|
| 666 | declare -g d=(1 2)
|
| 667 | echo "declare flag [$_]"
|
| 668 |
|
| 669 | ## STDOUT:
|
| 670 | colon [foo]
|
| 671 | bare assign []
|
| 672 | declare [s=bar]
|
| 673 | array []
|
| 674 | declare array [a]
|
| 675 | declare flag [d]
|
| 676 | ## END
|
| 677 |
|
| 678 | ## OK zsh STDOUT:
|
| 679 | colon [foo]
|
| 680 | bare assign []
|
| 681 | declare [declare]
|
| 682 | array [declare [declare]]
|
| 683 | declare array [declare]
|
| 684 | declare flag [-g]
|
| 685 | ## END
|
| 686 |
|
| 687 | ## OK osh STDOUT:
|
| 688 | colon [foo]
|
| 689 | bare assign [colon [foo]]
|
| 690 | declare [bare assign [colon [foo]]]
|
| 691 | array [declare [bare assign [colon [foo]]]]
|
| 692 | declare array [array [declare [bare assign [colon [foo]]]]]
|
| 693 | declare flag [declare array [array [declare [bare assign [colon [foo]]]]]]
|
| 694 | ## END
|
| 695 |
|
| 696 | ## N-I dash/mksh stdout-json: ""
|
| 697 |
|
| 698 | #### $_ with loop
|
| 699 |
|
| 700 | case $SH in (dash|mksh) exit ;; esac
|
| 701 |
|
| 702 | # zsh resets it when in a loop
|
| 703 |
|
| 704 | echo init
|
| 705 | echo begin=$_
|
| 706 | for x in 1 2 3; do
|
| 707 | echo prev=$_
|
| 708 | done
|
| 709 |
|
| 710 | ## STDOUT:
|
| 711 | init
|
| 712 | begin=init
|
| 713 | prev=begin=init
|
| 714 | prev=prev=begin=init
|
| 715 | prev=prev=prev=begin=init
|
| 716 | ## END
|
| 717 |
|
| 718 | ## OK zsh STDOUT:
|
| 719 | init
|
| 720 | begin=init
|
| 721 | prev=
|
| 722 | prev=prev=
|
| 723 | prev=prev=prev=
|
| 724 | ## END
|
| 725 | ## N-I dash/mksh stdout-json: ""
|
| 726 |
|
| 727 |
|
| 728 | #### $_ is not undefined on first use
|
| 729 | set -e
|
| 730 |
|
| 731 | x=$($SH -u -c 'echo prev=$_')
|
| 732 | echo status=$?
|
| 733 |
|
| 734 | # bash and mksh set $_ to $0 at first; zsh is empty
|
| 735 | #echo "$x"
|
| 736 |
|
| 737 | ## STDOUT:
|
| 738 | status=0
|
| 739 | ## END
|
| 740 |
|
| 741 | ## N-I dash status: 2
|
| 742 | ## N-I dash stdout-json: ""
|
| 743 |
|
| 744 | #### BASH_VERSION / OILS_VERSION
|
| 745 | case $SH in
|
| 746 | bash*)
|
| 747 | # BASH_VERSION=zz
|
| 748 |
|
| 749 | echo $BASH_VERSION | egrep -o '4\.4\.0' > /dev/null
|
| 750 | echo matched=$?
|
| 751 | ;;
|
| 752 | *osh)
|
| 753 | # note: version string is mutable like in bash. I guess that's useful for
|
| 754 | # testing? We might want a strict mode to eliminate that?
|
| 755 |
|
| 756 | echo $OILS_VERSION | egrep -o '[0-9]+\.[0-9]+\.' > /dev/null
|
| 757 | echo matched=$?
|
| 758 | ;;
|
| 759 | *)
|
| 760 | echo 'no version'
|
| 761 | ;;
|
| 762 | esac
|
| 763 | ## STDOUT:
|
| 764 | matched=0
|
| 765 | ## END
|
| 766 | ## N-I dash/mksh/zsh STDOUT:
|
| 767 | no version
|
| 768 | ## END
|
| 769 |
|
| 770 | #### $SECONDS
|
| 771 |
|
| 772 | # should be zero seconds
|
| 773 | echo seconds=$SECONDS
|
| 774 |
|
| 775 | ## status: 0
|
| 776 | ## STDOUT:
|
| 777 | seconds=0
|
| 778 | ## END
|
| 779 | ## N-I dash STDOUT:
|
| 780 | seconds=
|
| 781 | ## END
|
| 782 |
|