[Bug 1100359] [NEW] Reading from <STDIN> results in "Interrupted system call" error when SIGCHLD handler is active

[Dmitry]

Public bug reported:

Hi all,

I've stumbled upon quite a strange behaviour on a server which has
recently been upgraded from Debian squeeze to Ubuntu 12.04. I've
narrowed it down to a simple test case which is attached.

To reproduce the problem run "./f.pl | ./2.pl". Within a second
(sometimes it takes a bit longer) it gives me the following:

error: Interrupted system call at ./2.pl line 8, <STDIN> line 11.

I've also tried it on 12.10 and got exactly the same behaviour.

Best regards,
--
Dmitry

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: perl 5.14.2-6ubuntu2.2
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
Uname: Linux 3.2.0-35-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Wed Jan 16 16:20:32 2013
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: perl
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: perl (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug precise

** Attachment added: "perl_bug.tgz"
   https://bugs.launchpad.net/bugs/1100359/+attachment/3484814/+files/perl_bug.tgz

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https://bugs.launchpad.net/bugs/1100359

Title:
  Reading from <STDIN> results in "Interrupted system call" error when
  SIGCHLD handler is active

Status in “perl” package in Ubuntu:
  New

Bug description:
  Hi all,

  I've stumbled upon quite a strange behaviour on a server which has
  recently been upgraded from Debian squeeze to Ubuntu 12.04. I've
  narrowed it down to a simple test case which is attached.

  To reproduce the problem run "./f.pl | ./2.pl". Within a second
  (sometimes it takes a bit longer) it gives me the following:

  error: Interrupted system call at ./2.pl line 8, <STDIN> line 11.

  I've also tried it on 12.10 and got exactly the same behaviour.

  Best regards,
  --
  Dmitry

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: perl 5.14.2-6ubuntu2.2
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34
  Uname: Linux 3.2.0-35-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  Date: Wed Jan 16 16:20:32 2013
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MarkForUpload: True
  SourcePackage: perl
  UpgradeStatus: No upgrade log present (probably fresh install)

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