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   Dan Gohman (sunfish@hachyderm.io)'s status on Tuesday, 10-Sep-2024 16:15:42 JST Dan Gohman

   New blog post: Errors from `close`.

   Following up on my enormously(?) popular blog post about bugs in hello world, I dive into the electrifying topic of whether the fixed version still has a bug lurking. 🐛

   https://blog.sunfishcode.online/errors-from-close/

   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Tuesday, 10-Sep-2024 20:33:30 JST Haelwenn /элвэн/ :triskell:

     in reply to

     @sunfish Wouldn't the problem of dup-then-close being ignored due to reference counting also apply on the file descriptors passed by the shell? (Which effectively does open/fd-pass/close for redirections)

     Also for me calling close on files explicitly opened makes sense, while calling close on passed fds feels weird although exit(), implied for returns from main, closes all open streams. (cf. ISO C)

   • Embed this notice
     Dan Gohman (sunfish@hachyderm.io)'s status on Wednesday, 11-Sep-2024 05:29:44 JST Dan Gohman

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @lanodan

     > Wouldn't the problem [...] also apply on the file descriptors passed by the shell?

     The shell closes its own fd after doing the `dup2`, so the reference count would go back to 1 before the fd is passed to the new application.

     Haelwenn /элвэн/ :triskell: likes this.