| 1 | ## compare_shells: bash dash mksh zsh
|
| 2 |
|
| 3 | #### ~ expansion in assignment
|
| 4 | HOME=/home/bob
|
| 5 | a=~/src
|
| 6 | echo $a
|
| 7 | ## stdout: /home/bob/src
|
| 8 |
|
| 9 | #### ~ expansion in readonly assignment
|
| 10 | # dash fails here!
|
| 11 | # http://stackoverflow.com/questions/8441473/tilde-expansion-doesnt-work-when-i-logged-into-gui
|
| 12 | HOME=/home/bob
|
| 13 | readonly const=~/src
|
| 14 | echo $const
|
| 15 | ## stdout: /home/bob/src
|
| 16 | ## BUG dash stdout: ~/src
|
| 17 |
|
| 18 | #### No ~ expansion in dynamic assignment
|
| 19 | HOME=/home/bob
|
| 20 | binding='const=~/src'
|
| 21 | readonly "$binding"
|
| 22 | echo $const
|
| 23 | ## stdout: ~/src
|
| 24 |
|
| 25 | #### No tilde expansion in word that looks like assignment but isn't
|
| 26 | # bash and mksh mistakenly expand here!
|
| 27 | # bash fixes this in POSIX mode (gah).
|
| 28 | # http://lists.gnu.org/archive/html/bug-bash/2016-06/msg00001.html
|
| 29 | HOME=/home/bob
|
| 30 | echo x=~
|
| 31 | ## stdout: x=~
|
| 32 | ## BUG bash/mksh stdout: x=/home/bob
|
| 33 |
|
| 34 | #### tilde expansion of word after redirect
|
| 35 | HOME=$TMP
|
| 36 | echo hi > ~/tilde1.txt
|
| 37 | cat $HOME/tilde1.txt | wc -c
|
| 38 | ## stdout: 3
|
| 39 | ## status: 0
|
| 40 |
|
| 41 | #### other user
|
| 42 | echo ~nonexistent
|
| 43 | ## stdout: ~nonexistent
|
| 44 | # zsh doesn't like nonexistent
|
| 45 | ## OK zsh stdout-json: ""
|
| 46 | ## OK zsh status: 1
|
| 47 |
|
| 48 | #### ${undef:-~}
|
| 49 | HOME=/home/bar
|
| 50 | echo ${undef:-~}
|
| 51 | echo ${HOME:+~/z}
|
| 52 | echo "${undef:-~}"
|
| 53 | echo ${undef:-"~"}
|
| 54 | ## STDOUT:
|
| 55 | /home/bar
|
| 56 | /home/bar/z
|
| 57 | ~
|
| 58 | ~
|
| 59 | ## END
|
| 60 |
|
| 61 | #### ${x//~/~root}
|
| 62 | HOME=/home/bar
|
| 63 | x=~
|
| 64 | echo ${x//~/~root}
|
| 65 |
|
| 66 | # gah there is some expansion, what the hell
|
| 67 | echo ${HOME//~/~root}
|
| 68 |
|
| 69 | x=[$HOME]
|
| 70 | echo ${x//~/~root}
|
| 71 |
|
| 72 | ## STDOUT:
|
| 73 | /root
|
| 74 | /root
|
| 75 | [/root]
|
| 76 | ## END
|
| 77 | ## N-I dash status: 2
|
| 78 | ## N-I dash stdout-json: ""
|
| 79 |
|
| 80 | #### x=foo:~ has tilde expansion
|
| 81 | HOME=/home/bar
|
| 82 | x=foo:~
|
| 83 | echo $x
|
| 84 | echo "$x" # quotes don't matter, the expansion happens on assignment?
|
| 85 | x='foo:~'
|
| 86 | echo $x
|
| 87 |
|
| 88 | x=foo:~, # comma ruins it, must be /
|
| 89 | echo $x
|
| 90 |
|
| 91 | x=~:foo
|
| 92 | echo $x
|
| 93 |
|
| 94 | # no tilde expansion here
|
| 95 | echo foo:~
|
| 96 | ## STDOUT:
|
| 97 | foo:/home/bar
|
| 98 | foo:/home/bar
|
| 99 | foo:~
|
| 100 | foo:~,
|
| 101 | /home/bar:foo
|
| 102 | foo:~
|
| 103 | ## END
|
| 104 |
|
| 105 | #### a[x]=foo:~ has tilde expansion
|
| 106 | case $SH in (dash|zsh) exit ;; esac
|
| 107 |
|
| 108 | HOME=/home/bar
|
| 109 | declare -a a
|
| 110 | a[0]=foo:~
|
| 111 | echo ${a[0]}
|
| 112 |
|
| 113 | declare -A A
|
| 114 | A['x']=foo:~
|
| 115 | echo ${A['x']}
|
| 116 |
|
| 117 | ## STDOUT:
|
| 118 | foo:/home/bar
|
| 119 | foo:/home/bar
|
| 120 | ## END
|
| 121 | ## N-I dash/zsh stdout-json: ""
|
| 122 |
|
| 123 | #### tilde expansion an assignment keyword
|
| 124 | HOME=/home/bar
|
| 125 | f() {
|
| 126 | local x=foo:~
|
| 127 | echo $x
|
| 128 | }
|
| 129 | f
|
| 130 | ## STDOUT:
|
| 131 | foo:/home/bar
|
| 132 | ## END
|
| 133 | ## BUG dash STDOUT:
|
| 134 | foo:~
|
| 135 | ## END
|
| 136 |
|
| 137 | #### x=${undef-~:~}
|
| 138 | HOME=/home/bar
|
| 139 |
|
| 140 | x=~:${undef-~:~}
|
| 141 | echo $x
|
| 142 |
|
| 143 | # Most shells agree on a different behavior, but with the OSH parsing model,
|
| 144 | # it's easier to agree with yash. bash disagrees in a different way
|
| 145 |
|
| 146 | ## STDOUT:
|
| 147 | /home/bar:/home/bar:/home/bar
|
| 148 | ## END
|
| 149 | ## OK osh/yash STDOUT:
|
| 150 | /home/bar:~:~
|
| 151 | ## END
|
| 152 |
|
| 153 | #### strict tilde
|
| 154 | echo ~nonexistent
|
| 155 |
|
| 156 | shopt -s strict_tilde
|
| 157 | echo ~nonexistent
|
| 158 |
|
| 159 | echo status=$?
|
| 160 | ## status: 1
|
| 161 | ## STDOUT:
|
| 162 | ~nonexistent
|
| 163 | ## END
|
| 164 | ## N-I bash/dash/mksh status: 0
|
| 165 | ## N-I bash/dash/mksh STDOUT:
|
| 166 | ~nonexistent
|
| 167 | ~nonexistent
|
| 168 | status=0
|
| 169 | ## END
|
| 170 | ## OK zsh stdout-json: ""
|
| 171 |
|
| 172 | #### temp assignment x=~ env
|
| 173 |
|
| 174 | HOME=/home/bar
|
| 175 |
|
| 176 | xx=~ env | grep xx=
|
| 177 |
|
| 178 | # Does it respect the colon rule too?
|
| 179 | xx=~root:~:~ env | grep xx=
|
| 180 |
|
| 181 | ## STDOUT:
|
| 182 | xx=/home/bar
|
| 183 | xx=/root:/home/bar:/home/bar
|
| 184 | ## END
|