bug-bash
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: coproc FDs (file descriptors) available to subshells


From: Tadeus Prastowo
Subject: Re: coproc FDs (file descriptors) available to subshells
Date: Wed, 24 Jan 2018 19:52:29 +0100

On Wed, Jan 24, 2018 at 7:32 PM, Tadeus Prastowo
<address@hidden> wrote:
> On Wed, Jan 24, 2018 at 5:51 PM, Tadeus Prastowo
> <address@hidden> wrote:
>> On Wed, Jan 24, 2018 at 3:55 PM, Tadeus Prastowo
>> <address@hidden> wrote:

[...]

>>> Okay, I will propose a patch.
>>
>> diff --git a/doc/bashref.texi b/doc/bashref.texi
>> index c0f4a2f..fee8f0e 100644
>> --- a/doc/bashref.texi
>> +++ b/doc/bashref.texi
>> @@ -1197,7 +1197,10 @@ This pipe is established before any
>> redirections specified by the
>>  command (@pxref{Redirections}).
>>  The file descriptors can be utilized as arguments to shell commands
>>  and redirections using standard word expansions.
>> -The file descriptors are not available in subshells.
>> +The file descriptors are not available in subshells other than those
>> +created by command and process substitutions (see the descriptions
>> +the substitutions in @ref{Command Substitution} and
>> address@hidden Substitution}, respectively).
>>
>>  The process ID of the shell spawned to execute the coprocess is
>>  available as the value of the variable @env{NAME}_PID.
>> @@ -3025,6 +3028,12 @@ shell's parent, and traps ignored by the shell
>> are ignored
>>  A command invoked in this separate environment cannot affect the
>>  shell's execution environment.
>>
>> +Command substitution and process substitution are invoked in a
>> +separate execution environment that starts as an exact duplicate of
>> +the execution environment of the shell.  As before, any command within
>> +the separate execution environment cannot affect the shell's execution
>> +environment.
>> +
>>  Command substitution, commands grouped with parentheses,
>>  and asynchronous commands are invoked in a
>>  subshell environment that is a duplicate of the shell environment,
>
> I think the patch misses some information.  Please find attached the
> new patch that I propose.  What do you think?

Sorry, the patch still misses some information as per
https://lists.gnu.org/archive/html/bug-bash/2011-04/msg00056.html.  I
attach the updated patch.  What do you think?

Thank you.

--
Best regards,
Tadeus

Attachment: patch
Description: Binary data


reply via email to

[Prev in Thread] Current Thread [Next in Thread]