| 1 | ## compare_shells: dash bash mksh zsh ash
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| 2 |
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| 3 | #### command -v
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| 4 | myfunc() { echo x; }
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| 5 | command -v echo
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| 6 | echo $?
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| 7 |
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| 8 | command -v myfunc
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| 9 | echo $?
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| 10 |
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| 11 | command -v nonexistent # doesn't print anything
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| 12 | echo nonexistent=$?
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| 13 |
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| 14 | command -v '' # BUG FIX, shouldn't succeed
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| 15 | echo empty=$?
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| 16 |
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| 17 | command -v for
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| 18 | echo $?
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| 19 |
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| 20 | ## STDOUT:
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| 21 | echo
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| 22 | 0
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| 23 | myfunc
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| 24 | 0
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| 25 | nonexistent=1
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| 26 | empty=1
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| 27 | for
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| 28 | 0
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| 29 | ## OK dash/ash STDOUT:
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| 30 | echo
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| 31 | 0
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| 32 | myfunc
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| 33 | 0
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| 34 | nonexistent=127
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| 35 | empty=127
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| 36 | for
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| 37 | 0
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| 38 | ## END
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| 39 |
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| 40 | #### command -v executable, builtin
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| 41 |
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| 42 | #command -v grep ls
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| 43 |
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| 44 | command -v grep | egrep -o '/[^/]+$'
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| 45 | command -v ls | egrep -o '/[^/]+$'
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| 46 | echo
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| 47 |
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| 48 | command -v true
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| 49 | command -v eval
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| 50 |
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| 51 | ## STDOUT:
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| 52 | /grep
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| 53 | /ls
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| 54 |
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| 55 | true
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| 56 | eval
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| 57 | ## END
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| 58 |
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| 59 |
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| 60 | #### command -v with multiple names
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| 61 | # ALL FOUR SHELLS behave differently here!
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| 62 | #
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| 63 | # bash chooses to swallow the error! We agree with zsh if ANY word lookup
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| 64 | # fails, then the whole thing fails.
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| 65 |
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| 66 | myfunc() { echo x; }
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| 67 | command -v echo myfunc ZZZ for
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| 68 | echo status=$?
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| 69 |
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| 70 | ## STDOUT:
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| 71 | echo
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| 72 | myfunc
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| 73 | for
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| 74 | status=1
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| 75 | ## BUG bash STDOUT:
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| 76 | echo
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| 77 | myfunc
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| 78 | for
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| 79 | status=0
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| 80 | ## BUG dash/ash STDOUT:
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| 81 | echo
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| 82 | status=0
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| 83 | ## OK mksh STDOUT:
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| 84 | echo
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| 85 | myfunc
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| 86 | status=1
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| 87 | ## END
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| 88 |
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| 89 | #### command -v doesn't find non-executable file
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| 90 | # PATH resolution is different
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| 91 |
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| 92 | mkdir -p _tmp
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| 93 | PATH="_tmp:$PATH"
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| 94 | touch _tmp/non-executable _tmp/executable
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| 95 | chmod +x _tmp/executable
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| 96 |
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| 97 | command -v _tmp/non-executable
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| 98 | echo status=$?
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| 99 |
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| 100 | command -v _tmp/executable
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| 101 | echo status=$?
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| 102 |
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| 103 | ## STDOUT:
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| 104 | status=1
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| 105 | _tmp/executable
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| 106 | status=0
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| 107 | ## END
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| 108 |
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| 109 | ## BUG dash/ash STDOUT:
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| 110 | _tmp/non-executable
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| 111 | status=0
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| 112 | _tmp/executable
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| 113 | status=0
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| 114 | ## END
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| 115 |
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| 116 | #### command -V
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| 117 | myfunc() { echo x; }
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| 118 |
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| 119 | shopt -s expand_aliases
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| 120 | alias ll='ls -l'
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| 121 |
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| 122 | backtick=\`
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| 123 | command -V ll | sed "s/$backtick/'/g"
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| 124 | echo status=$?
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| 125 |
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| 126 | command -V echo
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| 127 | echo status=$?
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| 128 |
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| 129 | # Paper over insignificant difference
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| 130 | command -V myfunc | sed 's/shell function/function/'
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| 131 | echo status=$?
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| 132 |
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| 133 | command -V nonexistent # doesn't print anything
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| 134 | echo status=$?
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| 135 |
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| 136 | command -V for
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| 137 | echo status=$?
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| 138 |
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| 139 | ## STDOUT:
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| 140 | ll is an alias for "ls -l"
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| 141 | status=0
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| 142 | echo is a shell builtin
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| 143 | status=0
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| 144 | myfunc is a function
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| 145 | status=0
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| 146 | status=1
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| 147 | for is a shell keyword
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| 148 | status=0
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| 149 | ## END
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| 150 |
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| 151 | ## OK zsh STDOUT:
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| 152 | ll is an alias for ls -l
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| 153 | status=0
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| 154 | echo is a shell builtin
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| 155 | status=0
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| 156 | myfunc is a function
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| 157 | status=0
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| 158 | nonexistent not found
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| 159 | status=1
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| 160 | for is a reserved word
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| 161 | status=0
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| 162 | ## END
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| 163 |
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| 164 | ## OK bash STDOUT:
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| 165 | ll is aliased to 'ls -l'
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| 166 | status=0
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| 167 | echo is a shell builtin
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| 168 | status=0
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| 169 | myfunc is a function
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| 170 | myfunc ()
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| 171 | {
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| 172 | echo x
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| 173 | }
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| 174 | status=0
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| 175 | status=1
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| 176 | for is a shell keyword
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| 177 | status=0
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| 178 | ## END
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| 179 |
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| 180 | ## OK mksh STDOUT:
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| 181 | ll is an alias for 'ls -l'
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| 182 | status=0
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| 183 | echo is a shell builtin
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| 184 | status=0
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| 185 | myfunc is a function
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| 186 | status=0
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| 187 | nonexistent not found
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| 188 | status=1
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| 189 | for is a reserved word
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| 190 | status=0
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| 191 | ## END
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| 192 |
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| 193 | ## OK dash/ash STDOUT:
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| 194 | ll is an alias for ls -l
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| 195 | status=0
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| 196 | echo is a shell builtin
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| 197 | status=0
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| 198 | myfunc is a function
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| 199 | status=0
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| 200 | nonexistent: not found
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| 201 | status=127
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| 202 | for is a shell keyword
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| 203 | status=0
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| 204 | ## END
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| 205 |
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| 206 | #### command -V nonexistent
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| 207 | command -V nonexistent 2>err.txt
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| 208 | echo status=$?
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| 209 | fgrep -o 'nonexistent: not found' err.txt || true
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| 210 |
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| 211 | ## STDOUT:
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| 212 | status=1
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| 213 | nonexistent: not found
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| 214 | ## END
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| 215 |
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| 216 | ## OK zsh/mksh STDOUT:
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| 217 | nonexistent not found
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| 218 | status=1
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| 219 | ## END
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| 220 |
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| 221 | ## BUG dash/ash STDOUT:
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| 222 | nonexistent: not found
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| 223 | status=127
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| 224 | ## END
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| 225 |
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| 226 |
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| 227 | #### command skips function lookup
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| 228 | seq() {
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| 229 | echo "$@"
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| 230 | }
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| 231 | command # no-op
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| 232 | seq 3
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| 233 | command seq 3
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| 234 | # subshell shouldn't fork another process (but we don't have a good way of
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| 235 | # testing it)
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| 236 | ( command seq 3 )
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| 237 | ## STDOUT:
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| 238 | 3
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| 239 | 1
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| 240 | 2
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| 241 | 3
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| 242 | 1
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| 243 | 2
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| 244 | 3
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| 245 | ## END
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| 246 |
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| 247 | #### command command seq 3
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| 248 | command command seq 3
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| 249 | ## STDOUT:
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| 250 | 1
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| 251 | 2
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| 252 | 3
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| 253 | ## END
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| 254 | ## N-I zsh stdout-json: ""
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| 255 | ## N-I zsh status: 127
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| 256 |
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| 257 | #### command command -v seq
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| 258 | seq() {
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| 259 | echo 3
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| 260 | }
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| 261 | command command -v seq
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| 262 | ## stdout: seq
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| 263 | ## N-I zsh stdout-json: ""
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| 264 | ## N-I zsh status: 127
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| 265 |
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| 266 | #### command -p (override existing program)
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| 267 | # Tests whether command -p overrides the path
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| 268 | # tr chosen because we need a simple non-builtin
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| 269 | mkdir -p $TMP/bin
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| 270 | echo "echo wrong" > $TMP/bin/tr
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| 271 | chmod +x $TMP/bin/tr
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| 272 | PATH="$TMP/bin:$PATH"
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| 273 | echo aaa | tr "a" "b"
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| 274 | echo aaa | command -p tr "a" "b"
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| 275 | rm $TMP/bin/tr
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| 276 | ## STDOUT:
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| 277 | wrong
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| 278 | bbb
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| 279 | ## END
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| 280 |
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| 281 | #### command -p (hide tool in custom path)
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| 282 | mkdir -p $TMP/bin
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| 283 | echo "echo hello" > $TMP/bin/hello
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| 284 | chmod +x $TMP/bin/hello
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| 285 | export PATH=$TMP/bin
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| 286 | command -p hello
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| 287 | ## status: 127
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| 288 |
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| 289 | #### command -p (find hidden tool in default path)
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| 290 | export PATH=''
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| 291 | command -p ls
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| 292 | ## status: 0
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| 293 |
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| 294 |
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| 295 | #### $(command type ls)
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| 296 | type() { echo FUNCTION; }
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| 297 | type
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| 298 | s=$(command type echo)
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| 299 | echo $s | grep builtin > /dev/null
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| 300 | echo status=$?
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| 301 | ## STDOUT:
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| 302 | FUNCTION
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| 303 | status=0
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| 304 | ## END
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| 305 | ## N-I zsh STDOUT:
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| 306 | FUNCTION
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| 307 | status=1
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| 308 | ## END
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| 309 | ## N-I mksh STDOUT:
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| 310 | status=1
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| 311 | ## END
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| 312 |
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| 313 | #### builtin
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| 314 | cd () { echo "hi"; }
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| 315 | cd
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| 316 | builtin cd / && pwd
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| 317 | unset -f cd
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| 318 | ## STDOUT:
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| 319 | hi
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| 320 | /
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| 321 | ## END
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| 322 | ## N-I dash/ash STDOUT:
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| 323 | hi
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| 324 | ## END
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| 325 |
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| 326 | #### builtin ls not found
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| 327 | builtin ls
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| 328 | ## status: 1
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| 329 | ## N-I dash/ash status: 127
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| 330 |
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| 331 | #### builtin usage
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| 332 |
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| 333 | builtin
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| 334 | echo status=$?
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| 335 |
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| 336 | builtin --
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| 337 | echo status=$?
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| 338 |
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| 339 | builtin -- false
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| 340 | echo status=$?
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| 341 |
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| 342 | ## STDOUT:
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| 343 | status=0
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| 344 | status=0
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| 345 | status=1
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| 346 | ## END
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| 347 |
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| 348 | ## BUG zsh STDOUT:
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| 349 | status=0
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| 350 | status=1
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| 351 | status=1
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| 352 | ## END
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| 353 |
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| 354 | ## N-I dash/ash STDOUT:
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| 355 | status=127
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| 356 | status=127
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| 357 | status=127
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| 358 | ## END
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| 359 |
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| 360 | #### builtin command echo hi
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| 361 | builtin command echo hi
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| 362 | ## status: 0
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| 363 | ## stdout: hi
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| 364 | ## N-I dash/ash status: 127
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| 365 | ## N-I dash/ash stdout-json: ""
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