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