Bug: Failed to read initial configuration, open() syscall might be inter

Hi,

Error:

bash: /etc/bash.bashrc: Interrupted system call

Reproduced on bash-4.4 via gnome-terminal or terminator terminal.

Traces attached, issue is at line 42065

Here is short analyze of bug.

Correct scenario, P - parent, C - child:

(P) terminator does clone()
(C) SIGWINCH(terminal resized) is configured with SA_RESTART (do not interrupt syscalls on this signal)
(C) execve(/bin/bash)
(P) terminator send SIGWINCH
(C) SIGWINCH handled by bash
(C) bash reconfigures SIGWINCH without SA_RESTART (syscalls will be interrupted)
(C) bash opens bashrc file

Some time parent gets control little bit later, different timing:

(P) terminator does clone()
(C) SIGWINCH(terminal resized) is configured with SA_RESTART (do not interrupt syscalls on this signal)
(C) execve(/bin/bash)
(C) bash reconfigures SIGWINCH without SA_RESTART (syscalls will be interrupted)
(C) bash opens bashrc file (is not finished yet)
(P) terminator send SIGWINCH
(C) SIGWINCH handled by bash and interrupts open(bashrc)
(C) open(bashrc) failed with -EINTR, configuration read failed

Best Regards,

From:	Andriy Prystupa
Subject:	Bug: Failed to read initial configuration, open() syscall might be interrupted.
Date:	Wed, 5 Oct 2016 16:04:44 +0300