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## compare_shells: bash dash mksh zsh
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# Alias is in POSIX.
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#
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# http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_03_01
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#
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# Bash is the only one that doesn't support aliases by default!
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shopt -s expand_aliases || true
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alias -- foo=echo
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echo status=$?
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foo x
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unalias -- foo
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foo x
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## status: 127
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## STDOUT:
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status=0
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x
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## END
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# dash doesn't accept --
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## BUG dash STDOUT:
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status=1
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x
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## END
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shopt -s expand_aliases # bash requires this
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alias hi='echo hello world'
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hi || echo 'should not run this'
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echo hi # second word is not
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'hi' || echo 'expected failure'
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## STDOUT:
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hello world
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hi
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expected failure
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## END
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shopt -s expand_aliases
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alias e=echo; e one # this is not alias-expanded because we parse lines at once
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e two; e three
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## STDOUT:
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two
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three
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## END
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shopt -s expand_aliases
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alias echo='echo foo'
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echo bar
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## stdout: foo bar
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shopt -s expand_aliases # bash requires this
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x=x
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y=y
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alias echo-x='echo $x' echo-y='echo $y'
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echo status=$?
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echo-x X
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echo-y Y
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unalias echo-x echo-y
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echo status=$?
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echo-x X || echo undefined
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echo-y Y || echo undefined
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## STDOUT:
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status=0
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x X
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y Y
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status=0
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undefined
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undefined
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## END
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alias e='echo' nonexistentZ
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echo status=$?
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## STDOUT:
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status=1
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## END
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## OK mksh STDOUT:
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nonexistentZ alias not found
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status=1
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## END
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alias e=echo ll='ls -l'
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unalias e nonexistentZ ll
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echo status=$?
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## STDOUT:
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status=1
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## END
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alias foo=bar
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alias spam=eggs
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alias | egrep 'foo|spam' | wc -l
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unalias -a
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alias
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echo status=$?
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## STDOUT:
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2
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status=0
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## END
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alias e=echo ll='ls -l'
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alias e ll
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## STDOUT:
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alias e='echo'
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alias ll='ls -l'
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## END
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## OK mksh/zsh STDOUT:
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e=echo
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ll='ls -l'
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## END
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## OK dash STDOUT:
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e='echo'
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ll='ls -l'
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## END
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alias ex=exit ll='ls -l'
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alias | grep -E 'ex=|ll=' # need to grep because mksh/zsh have builtin aliases
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echo status=$?
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## STDOUT:
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alias ex='exit'
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alias ll='ls -l'
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status=0
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## END
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## OK dash STDOUT:
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ex='exit'
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ll='ls -l'
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status=0
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## END
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## OK mksh/zsh STDOUT:
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ex=exit
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ll='ls -l'
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status=0
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## END
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unalias
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echo status=$?
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## stdout: status=2
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## BUG mksh/dash stdout: status=0
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## BUG zsh stdout: status=1
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shopt -s expand_aliases # bash requires this
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alias hi='echo hello world '
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alias punct='!!!'
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hi punct
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alias hi='echo hello world' # No trailing space
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hi punct
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## STDOUT:
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hello world !!!
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hello world punct
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## END
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shopt -s expand_aliases # bash requires this
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alias hi='e_ hello world'
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alias e_='echo __'
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hi # first hi is expanded to echo hello world; then echo is expanded. gah.
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## STDOUT:
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__ hello world
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## END
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shopt -s expand_aliases # bash requires this
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alias one='ONE '
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alias two='TWO '
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alias e_='echo one '
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e_ two hello world
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## STDOUT:
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one TWO hello world
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## END
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shopt -s expand_aliases # bash requires this
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x=x
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alias echo-x='echo $x' # nothing is evaluated here
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x=y
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echo-x hi
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## STDOUT:
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y hi
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## END
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shopt -s expand_aliases # bash requires this
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alias echo_alias_='echo'
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cmd=echo_alias_
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echo_alias_ X # this works
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$cmd X # this fails because it's quoted
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echo status=$?
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## STDOUT:
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X
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status=127
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## END
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shopt -s expand_aliases # bash requires this
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x=x
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alias echo-x='echo $x' # nothing is evaluated here
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echo-x echo-x
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## STDOUT:
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x echo-x
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## END
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shopt -s expand_aliases # bash requires this
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x=x
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alias echo-x='echo $x ' # nothing is evaluated here
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echo-x echo-x
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## STDOUT:
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x echo x
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## END
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shopt -s expand_aliases # bash requires this
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alias echo_alias_= 'echo --; echo' # bad space here
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echo_alias_ x
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## status: 127
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shopt -s expand_aliases # bash requires this
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x=x
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name='echo_alias_'
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val='=echo'
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alias "$name$val"
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echo_alias_ X
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## stdout: X
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# NOTE: / is not OK in bash, but OK in other shells. Must less restrictive
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# than var names.
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shopt -s expand_aliases # bash requires this
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alias e_+.~x='echo'
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e_+.~x X
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## stdout: X
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shopt -s expand_aliases # bash requires this
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alias e_=';; oops'
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e_ x
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## status: 2
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## OK mksh/zsh status: 1
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shopt -s expand_aliases # bash requires this
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alias e_='for i in 1 2 3; do echo $i;'
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e_ done
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## STDOUT:
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1
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2
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3
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## END
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shopt -s expand_aliases
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alias e_='for i in 1 2 3; do echo '
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e_ $i; done
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## STDOUT:
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1
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2
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3
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## END
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## OK osh stdout-json: ""
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## OK osh status: 2
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shopt -s expand_aliases # bash requires this
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alias FOR1='for '
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alias FOR2='FOR1 '
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alias eye1='i '
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alias eye2='eye1 '
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alias IN='in '
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alias onetwo='$one "2" ' # NOTE: this does NOT work in any shell except bash.
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one=1
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FOR2 eye2 IN onetwo 3; do echo $i; done
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## STDOUT:
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1
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2
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3
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## END
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## OK osh stdout-json: ""
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## OK osh status: 2
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## BUG zsh stdout-json: ""
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shopt -s expand_aliases
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alias e_='echo "'
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var=x
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e_ '${var}"'
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## status: 2
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## OK mksh/zsh status: 1
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shopt -s expand_aliases
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alias e_='echo 1
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echo 2
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echo 3'
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var='echo foo'
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e_ ${var}
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## STDOUT:
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1
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2
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3 echo foo
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## END
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shopt -s expand_aliases
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alias e_='echo 1
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echo 2
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echo 3
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'
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var='echo foo'
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e_ ${var}
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## STDOUT:
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1
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2
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3
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foo
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## END
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## OK zsh STDOUT:
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1
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2
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3
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## END
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## OK zsh status: 127
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shopt -s expand_aliases
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alias SEQ='seq '
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alias THREE='3 '
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alias WC='wc '
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SEQ THREE | WC -l
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## stdout: 3
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# This could be parsed correctly, but it is only defined in a child process.
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shopt -s expand_aliases
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echo $(alias sayhi='echo hello')
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sayhi
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## status: 127
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shopt -s expand_aliases
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alias sayhi='echo hello'; sayhi same line
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sayhi other line
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## STDOUT:
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hello other line
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## END
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shopt -s expand_aliases
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eval "alias sayhi='echo hello'
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sayhi inside"
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sayhi outside
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## STDOUT:
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hello inside
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hello outside
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## END
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## BUG zsh STDOUT:
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hello outside
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## END
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shopt -s expand_aliases
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alias e_=echo
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>$TMP/alias1.txt e_ 1
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e_ >$TMP/alias2.txt 2
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e_ 3 >$TMP/alias3.txt
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cat $TMP/alias1.txt $TMP/alias2.txt $TMP/alias3.txt
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## STDOUT:
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1
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2
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3
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## END
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shopt -s expand_aliases
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alias p_=printenv.py
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FOO=1 printenv.py FOO
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FOO=2 p_ FOO
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## STDOUT:
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1
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2
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## END
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shopt -s expand_aliases
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alias e_='echo '
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alias one='ONE '
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alias two='TWO '
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alias three='THREE' # no trailing space
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e_ one \
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two one \
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two three two \
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one
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## stdout: ONE TWO ONE TWO THREE two one
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shopt -s expand_aliases
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alias LEFT='{'
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LEFT echo one; echo two; }
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## STDOUT:
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one
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two
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## END
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## OK osh stdout-json: ""
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## OK osh status: 2
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shopt -s expand_aliases
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alias LEFT='('
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LEFT echo one; echo two )
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## STDOUT:
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one
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two
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## END
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## OK osh stdout-json: ""
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## OK osh status: 2
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# This spec seems to be contradictoary?
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# http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_03_01
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# "When used as specified by this volume of POSIX.1-2017, alias definitions
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# shall not be inherited by separate invocations of the shell or by the utility
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# execution environments invoked by the shell; see Shell Execution
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# Environment."
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shopt -s expand_aliases
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alias echo_='echo [ '
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( echo_ subshell; )
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echo $(echo_ commandsub)
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## STDOUT:
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[ subshell
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[ commandsub
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## END
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shopt -s expand_aliases
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alias echo_='echo [ '
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cat <<EOF
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$(echo_ ])
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EOF
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## STDOUT:
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[ ]
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## END
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shopt -s expand_aliases
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alias c='cat <<EOF
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$(echo hi)
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EOF
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'
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c
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## STDOUT:
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hi
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## END
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## BUG bash stdout-json: ""
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## BUG bash status: 127
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|
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shopt -s expand_aliases
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alias zero='echo 0'
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a[$(zero)]=ZERO
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a[1]=ONE
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argv.py "${a[@]}"
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## STDOUT:
|
485 |
['ZERO', 'ONE']
|
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## END
|
487 |
## N-I dash stdout-json: ""
|
488 |
## N-I dash status: 2
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489 |
## N-I zsh stdout-json: ""
|
490 |
## N-I zsh status: 1
|
491 |
|
492 |
|
493 |
shopt -s expand_aliases
|
494 |
alias t1='echo hi|wc -c'
|
495 |
t1
|
496 |
## STDOUT:
|
497 |
3
|
498 |
## END
|
499 |
|
500 |
|
501 |
shopt -s expand_aliases
|
502 |
alias t1='echo one && echo two && echo 3 | wc -l;
|
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echo four'
|
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t1
|
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## STDOUT:
|
506 |
one
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two
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1
|
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four
|
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## END
|
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|
512 |
|
513 |
cd $TMP
|
514 |
shopt -s expand_aliases
|
515 |
echo foo bar > tmp.txt
|
516 |
alias a=argv.py
|
517 |
a `cat tmp.txt`
|
518 |
## stdout: ['foo', 'bar']
|
519 |
|
520 |
|
521 |
shopt -s expand_aliases
|
522 |
alias a=argv.py
|
523 |
a $((1 + 2))
|
524 |
## stdout: ['3']
|
525 |
|
526 |
|
527 |
# dash enters an infinite loop!
|
528 |
case $SH in
|
529 |
dash)
|
530 |
exit 1
|
531 |
;;
|
532 |
esac
|
533 |
|
534 |
set -x
|
535 |
PS4='+$(echo trace) '
|
536 |
shopt -s expand_aliases
|
537 |
alias a=argv.py
|
538 |
a foo bar
|
539 |
## stdout: ['foo', 'bar']
|
540 |
## BUG dash status: 1
|
541 |
## BUG dash stdout-json: ""
|
542 |
|
543 |
|
544 |
# from issue #299
|
545 |
shopt -s expand_aliases
|
546 |
alias a=
|
547 |
|
548 |
# both of these fail to parse in OSH
|
549 |
# this is because of our cleaner evaluation model
|
550 |
|
551 |
a (( var = 0 ))
|
552 |
#a case x in x) true;; esac
|
553 |
|
554 |
echo done
|
555 |
## stdout: done
|
556 |
## OK osh status: 2
|
557 |
## OK osh stdout-json: ""
|
558 |
|
559 |
|
560 |
|
561 |
shopt -s expand_aliases
|
562 |
|
563 |
alias ll='ls -l'
|
564 |
ll '1
|
565 |
2
|
566 |
3'
|
567 |
echo status=$?
|
568 |
|
569 |
## STDOUT:
|
570 |
status=2
|
571 |
## END
|