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Re: leaks fd for internal functions but not external command
From: |
Sam Liddicott |
Subject: |
Re: leaks fd for internal functions but not external command |
Date: |
Tue, 23 Jul 2019 16:40:03 +0100 |
On Tue, 23 Jul 2019 at 16:35, Chet Ramey <chet.ramey@case.edu> wrote:
> On 7/23/19 11:20 AM, Sam Liddicott wrote:
> >
> > On Tue, 23 Jul 2019 at 16:15, Sam Liddicott <sam@liddicott.com
> > <mailto:sam@liddicott.com>> wrote:
> >
> >
> >
> > On Tue, 23 Jul 2019 at 16:13, Chet Ramey <chet.ramey@case.edu
> > <mailto:chet.ramey@case.edu>> wrote:
> >
> > On 7/23/19 11:11 AM, Sam Liddicott wrote:
> >
> > > The report concerns the different behaviour with internal and
> > external
> > > operations.
> >
> > Right. The close-on-exec is deliberate. That's how it was
> intended.
> >
> >
> > Doesn't close-on-exec usually takes effect only on the process that
> > does the exec?
> > i.e. the fork that does the exec, not the parent process?
> >
> >
> > It got closed in the parent. The lsof is running for the parent, the main
> > process. /bin/echo has quit before the lsof runs.
>
> You mean case 2 in your original post? That's because redirections are
> performed in the child process forked to run /bin/echo, so the fd never
> exists in the parent process. I thought you were talking about case 1,
> with the builtin echo.
>
No doubt, but this report concerns the inconsistency.
Is using {xxx}>... suppose to give me a file handle I can use as I wish (as
you say), or not?
Using explicit descriptors e.g. 10>... behaves consistently whether the the
command is internal or external.
Having bash allocate the descriptor is not consistent.
Sam
- leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command,
Sam Liddicott <=
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/23
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/23
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/24
- leaks fd for internal functions but not external command, Chet Ramey, 2019/07/25
- Re: leaks fd for internal functions but not external command, Sam Liddicott, 2019/07/25
- Re: leaks fd for internal functions but not external command, Chet Ramey, 2019/07/25
- Re: leaks fd for internal functions but not external command, Greg Wooledge, 2019/07/23