[ruby-core:64727] [ruby-trunk - Feature #10181] New method File.openat()

From: normalperson@...
Date: 2014-09-03 06:20:47 UTC
List: ruby-core #64727
Issue #10181 has been updated by Eric Wong.


 We already have opendir (in the form of Dir.open), so would
 Dir.at would be an alias of Dir.open?
 
 I do not like aliases since they makes reading/searching code harder.
 
 But I think we should use Dir.open instead of File.open/File.new for
 openat, and also support Dir#fileno:
    https://bugs.ruby-lang.org/issues/9880

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Feature #10181: New method File.openat()
https://bugs.ruby-lang.org/issues/10181#change-48621

* Author: Technorama Ltd.
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
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The purpose of the openat() function is to enable opening files in directories other than the current working directory without exposure to race conditions. Any part of the path of a file could be changed in parallel to a call to open(), resulting in unspecified behavior. By opening a file descriptor for the target directory and using the openat() function it can be guaranteed that the opened file is located relative to the desired directory.

openat() is part of POSIX.1-2008.

Compatibility:
  Linux kernel >= 2.6.16
  FreeBSD >= 7.0
  OpenBSD >= 5.0
  NetBSD >= 6.1.4
  MacOS/X no

Pull request: https://github.com/ruby/ruby/pull/706



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