From: "jeremyevans0 (Jeremy Evans)" Date: 2022-11-19T23:07:54+00:00 Subject: [ruby-core:110822] [Ruby master Bug#19130] MRI failing when executing shell builtin commands with Errno::ENOENT Issue #19130 has been updated by jeremyevans0 (Jeremy Evans). I don't think this is a bug. Ruby's behavior for the Kernel backtick method (what `%x` uses) is that a shell is only used if Ruby thinks it is necessary. If Ruby doesn't determine the use of a shell is necessary, it will directly execute the program instead of using a shell. Here's an example showing the behavior: ``` # Simple command line that Ruby doesn't use a shell for $ ruby -e 'puts %x{ps al}.split("\n").grep(/#{$$}/)' 1000 54241 42309 3 2 0 61228 15220 kqread S+ pi 0:00.14 ruby -e puts %x{ps al}.split("\\n").grep(/#{$$}/) (ruby31) 1000 24047 54241 3 31 0 736 756 - R+pU/0 pi 0:00.00 ps -al # Command line including pipe, which Ruby does use a shell for $ ruby -e 'puts %x{ps al | grep #{$$}}' 1000 37783 42309 3 2 0 61228 15224 kqread S+ pi 0:00.14 ruby -e puts %x{ps al | grep #{$$}} (ruby31) 1000 95607 37783 3 18 0 872 880 sigsusp S+p pi 0:00.01 sh -c ps al | grep 37783 1000 47178 95607 3 31 0 172 460 - R+/2 pi 0:00.00 grep 37783 ``` If you want to force the use of a shell when would not be used, you need to manually execute the shell: ```ruby %x{sh -c "type type"} # => "type is a shell builtin\n" ``` ---------------------------------------- Bug #19130: MRI failing when executing shell builtin commands with Errno::ENOENT https://bugs.ruby-lang.org/issues/19130#change-100179 * Author: ifiht (Mikal R) * Status: Open * Priority: Normal * ruby -v: 3.2.0 * Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN ---------------------------------------- Sorry if this came up already, Google & Redmine came up blank but maybe I missed it. Bug was found on 3.0.0 but I tested on 3.2.0-preview1 and it's present on both. Trying to execute any shell builtin commands from irb or script fails with `No such file or directory - (Errno::ENOENT)` ``` ���$ rvm list * ruby-3.0.0 [ x86_64 ] => ruby-3.2.0-preview1 [ x86_64 ] ``` MRI 3.0.0: ``` 3.0.0 :001 > %x(type ls) Traceback (most recent call last): 5: from /home/ifiht/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `
' 4: from /home/ifiht/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `load' 3: from /home/ifiht/.rvm/rubies/ruby-3.0.0/lib/ruby/gems/3.0.0/gems/irb-1.3.0/exe/irb:11:in `' 2: from (irb):1:in `
' 1: from (irb):1:in ``' Errno::ENOENT (No such file or directory - type) 3.0.0 :002 > %x(cd /home/ifiht) Traceback (most recent call last): 6: from /home/ifiht/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `
' 5: from /home/ifiht/.rvm/rubies/ruby-3.0.0/bin/irb:23:in `load' 4: from /home/ifiht/.rvm/rubies/ruby-3.0.0/lib/ruby/gems/3.0.0/gems/irb-1.3.0/exe/irb:11:in `' 3: from (irb):1:in `
' 2: from (irb):2:in `rescue in
' 1: from (irb):2:in ``' Errno::ENOENT (No such file or directory - cd) 3.0.0 :003 > exit ``` MRI 3.2.0: ``` :001 > %x(type ls) (irb):1:in ``': No such file or directory - type (Errno::ENOENT) from (irb):1:in `
' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/lib/ruby/gems/3.2.0+1/gems/irb-1.4.1/exe/irb:11:in `' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/bin/irb:25:in `load' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/bin/irb:25:in `
' :002 > `type ls` (irb):2:in ``': No such file or directory - type (Errno::ENOENT) from (irb):2:in `
' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/lib/ruby/gems/3.2.0+1/gems/irb-1.4.1/exe/irb:11:in `' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/bin/irb:25:in `load' from /home/ifiht/.rvm/rubies/ruby-3.2.0-preview1/bin/irb:25:in `
' ``` Assuming this is a bug? Let me know if shell builtins are deliberately excluded for some reason, I'll try to work around it. -- https://bugs.ruby-lang.org/ Unsubscribe: