From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Jerry D <jvdelisle2@gmail.com>
Cc: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>,
gfortran <fortran@gcc.gnu.org>,
gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: [patch, libgfortran] Part 2: PR105456 Child I/O does not propage iostat
Date: Thu, 29 Feb 2024 10:13:38 -0800 [thread overview]
Message-ID: <ZeDJUn02oSzPadUO@troutmask.apl.washington.edu> (raw)
In-Reply-To: <a54fa158-378a-4b5d-b1d1-703d9a45e4d7@gmail.com>
On Thu, Feb 29, 2024 at 09:36:43AM -0800, Jerry D wrote:
> On 2/29/24 1:47 AM, Bernhard Reutner-Fischer wrote:
>
> > And, just for my own education, the length limitation of iomsg to 255
> > chars is not backed by the standard AFAICS, right? It's just our
> > STRERR_MAXSZ?
>
> Yes, its what we have had for a long lone time. Once you throw an error
> things get very processor dependent. I found MSGLEN set to 100 and IOMSG_len
> to 256. Nothing magic about it.
>
There is no restriction on the length for the iomsg-variable
that receives the generated error message. In fact, if the
iomsg-variable has a deferred-length type parameter, then
(re)-allocation to the exact length is expected.
F2023
12.11.6 IOMSG= specifier
If an error, end-of-file, or end-of-record condition occurs during
execution of an input/output statement, iomsg-variable is assigned
an explanatory message, as if by intrinsic assignment. If no such
condition occurs, the definition status and value of iomsg-variable
are unchanged.
character(len=23) emsg
read(fd,*,iomsg=emsg)
Here, the generated iomsg is either truncated to a length of 23
or padded with blanks to a length of 23.
character(len=:), allocatable :: emsg
read(fd,*,iomsg=emsg)
Here, emsg should have the length of whatever error message was
generated.
HTH
--
Steve
next prev parent reply other threads:[~2024-02-29 18:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-29 5:29 Jerry D
2024-02-29 9:47 ` Bernhard Reutner-Fischer
2024-02-29 17:36 ` Jerry D
2024-02-29 18:13 ` Steve Kargl [this message]
[not found] ` <033ebcdd-6e25-4af7-9012-3338978751d8@gmail.com>
[not found] ` <05A1AEE6-6A68-4D4F-8BEA-6E87969E19E7@gmail.com>
2024-03-05 3:15 ` Jerry D
2024-03-05 21:30 ` rep.dot.nop
2024-03-05 21:37 ` Harald Anlauf
2024-03-05 21:37 ` Harald Anlauf
2024-03-05 21:51 ` Harald Anlauf
2024-03-05 21:51 ` Harald Anlauf
2024-03-06 4:06 ` Jerry D
2024-03-06 6:06 ` Steve Kargl
2024-03-06 17:13 ` Harald Anlauf
2024-03-06 17:13 ` Harald Anlauf
2024-03-07 4:01 ` Jerry D
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZeDJUn02oSzPadUO@troutmask.apl.washington.edu \
--to=sgk@troutmask.apl.washington.edu \
--cc=fortran@gcc.gnu.org \
--cc=gcc-patches@gcc.gnu.org \
--cc=jvdelisle2@gmail.com \
--cc=rep.dot.nop@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).