6 ms·

Kind of worrying that the inventor of PowerShell could make such a mistake. Reminds be of when rvm used an alias for "cd", which was even worse. Making up alias

Kind of worrying that the inventor of PowerShell could make such a mistake. Reminds be of when rvm used an alias for "cd", which was even worse. Making up alias for popular tools such as cd, curl or wget is always a bad idea both for security and practical reasons since it breaks many tools in non-obvious ways and can be hijacked etc. It's great though that it's being fixed. I installed PS on my ubuntu last night, it works but I don't really see the point in using it on anything but windows. Last thing I need is worry whether my scripts will run on my custom shell script as if running ubuntu didn't come with its own issues to worry about already.

amyjess 10y ago
> Making up alias for popular tools such as cd cd is a shell builtin on every single *nix shell, not an independent tool. Every shell has its own cd implementation.
- dTal 10y ago
  You might also add that it's actually impossible to implement cd as a standalone tool - processes cannot change their parent's working directory.
  - richardwhiuk 10y ago
    It's not pretty, but you can: https://rudd-o.com/linux-and-free-software/the-shell-challenge-changing-another-process-working-directory https://rudd-o.com/linux-and-free-software/the-shell-challen...
    - dTal 10y ago
      Well how about that. Serve me right calling something "impossible". Now what do I say? "Impossible without awful hackery"?
  - iaskwhy 10y ago
    Are other commands also different from shell to shell? It seems like an interesting point, if true.
    - snuxoll 10y ago
      Here's a couple of pages listing the builtins in bash: https://www.gnu.org/software/bash/manual/html_node/Shell-Builtin-Commands.html https://www.gnu.org/software/bash/manual/html_node/Shell-Bui... And zsh: http://zsh.sourceforge.net/Doc/Release/Shell-Builtin-Commands.html http://zsh.sourceforge.net/Doc/Release/Shell-Builtin-Command... Powershell doesn't really have "builtins" per-se, every cmdlet is executed in the process of the shell itself but they're all contained within loadable modules (though 2-3 modules are loaded with the shell startup by default), Invoke-WebRequest is contained within Microsoft.PowerShell.Utility for example.
    - kemayo 10y ago
      Lots of simple shell functionality is provided as builtins. See the bash manual for a list of builtins inherited from the Bourne Shell[1] and that are bash-specific[2]. Note that some of these are part of the POSIX standard, so there's not a huge amount of variance allowed between shells which are being compliant. Obviously, PowerShell doesn't adhere to this. [1] https://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html#Bourne-Shell-Builtins https://www.gnu.org/software/bash/manual/html_node/Bourne-Sh... [2]: https://www.gnu.org/software/bash/manual/html_node/Bash-Builtins.html#Bash-Builtins https://www.gnu.org/software/bash/manual/html_node/Bash-Buil...

amyjess 10y ago

> Making up alias for popular tools such as cd cd is a shell builtin on every single *nix shell, not an independent tool. Every shell has its own cd implementation.

dTal 10y ago
You might also add that it's actually impossible to implement cd as a standalone tool - processes cannot change their parent's working directory.
- richardwhiuk 10y ago
  It's not pretty, but you can: https://rudd-o.com/linux-and-free-software/the-shell-challenge-changing-another-process-working-directory https://rudd-o.com/linux-and-free-software/the-shell-challen...
  - dTal 10y ago
    Well how about that. Serve me right calling something "impossible". Now what do I say? "Impossible without awful hackery"?
- iaskwhy 10y ago
  Are other commands also different from shell to shell? It seems like an interesting point, if true.
  - snuxoll 10y ago
    Here's a couple of pages listing the builtins in bash: https://www.gnu.org/software/bash/manual/html_node/Shell-Builtin-Commands.html https://www.gnu.org/software/bash/manual/html_node/Shell-Bui... And zsh: http://zsh.sourceforge.net/Doc/Release/Shell-Builtin-Commands.html http://zsh.sourceforge.net/Doc/Release/Shell-Builtin-Command... Powershell doesn't really have "builtins" per-se, every cmdlet is executed in the process of the shell itself but they're all contained within loadable modules (though 2-3 modules are loaded with the shell startup by default), Invoke-WebRequest is contained within Microsoft.PowerShell.Utility for example.
  - kemayo 10y ago
    Lots of simple shell functionality is provided as builtins. See the bash manual for a list of builtins inherited from the Bourne Shell[1] and that are bash-specific[2]. Note that some of these are part of the POSIX standard, so there's not a huge amount of variance allowed between shells which are being compliant. Obviously, PowerShell doesn't adhere to this. [1] https://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html#Bourne-Shell-Builtins https://www.gnu.org/software/bash/manual/html_node/Bourne-Sh... [2]: https://www.gnu.org/software/bash/manual/html_node/Bash-Builtins.html#Bash-Builtins https://www.gnu.org/software/bash/manual/html_node/Bash-Buil...