Hello,

while gpsd itself starts fine, it fails to provide time via the SHM
interface to ntpsec on armhf architecture.
Version 3.25-5+deb13u1 works fine.

Apart from ntpsec not picking up time from the configure shm segment as with
the working version (checking with ntpq -p), ipcs -m reports a shm segment size
of 80 bytes for version 3.27.5-0.1, while it is 96 for 3.25-5+deb13u1, and
also what ntpsec creates when started first.

Best regards,

Joerg

tags 1140603 + patch fixed-upstream
thanks

Upstream has fixed the bug in the current git head.

Repackaging the current version would be greatly appreciated.

Best regards

Joerg

Hi,

If by repackaging, you mean uploading a packaged based on git head -
that is not an option. I'd rather wait for the next version to be
released and upload that.

Alternatively, the other way is to apply a minimal targeted fix on
3.27.5 - a patch addressing that problem only. But from what I saw in
git, I am not confident that I can properly extract that without
breaking something else.

If you can point me to the minimal patch that fixes the problem, I will
do it.

With best regards,
b.

Hi,

On Sun, 09 Aug 2026 11:58:33 +0300 Boian Bonev <bbonev@ipacct.com> wrote:
[...]

That patch is the following commit
https://gitlab.com/gpsd/gpsd/-/commit/8f7a59f768a87d45f546643ec7ea0546be4e0dbf

It affects only 1 file fixing exactly this bug.
The complete story is at
https://gitlab.com/gpsd/gpsd/-/work_items/403

Best regards,

Joerg

https://gitlab.com/gpsd/gpsd/-/commit/8f7a59f768a87d45f546643ec7ea0546be4e0dbf.patch
gives a directly usable patch:


From 8f7a59f768a87d45f546643ec7ea0546be4e0dbf Mon Sep 17 00:00:00 2001
From: "Gary E. Miller" <gem@rellim.com>
Date: Tue, 30 Jun 2026 20:32:13 -0700
Subject: [PATCH] inclide/ntpshm.h: Partially revert 42309b8f.

Armian uses 64 bit time_t on 32 bit kernel, but does not
set _TIME_BITS.
---
 include/ntpshm.h | 18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/include/ntpshm.h b/include/ntpshm.h
index c8d5128ad..1c118525d 100644
--- a/include/ntpshm.h
+++ b/include/ntpshm.h
@@ -1,5 +1,5 @@
 /*
- * This file is Copyright 2015 by the GPSD project
+ * This file is Copyright by the GPSD project
  * SPDX-License-Identifier: BSD-2-clause
  */

@@ -39,23 +39,11 @@ struct shmTime
                  *       clear valid
                  */
     volatile int count;
-#if defined(_TIME_BITS) && 64 == _TIME_BITS
-    /* libc default time_t is 32-bits, but we are using 64-bits.
-     * glibc 2.34 and later.
-     * Lower 31 bits, no sign bit, are here. */
-    unsigned clockTimeStampSec;
-#else
+    // time_t may be 32 or 64-bit, depending
     time_t clockTimeStampSec;
-#endif
     int clockTimeStampUSec;
-#if defined(_TIME_BITS) && 64 == _TIME_BITS
-    /* libc default time_t is 32-bits, but we are using 64-bits.
-     * glibc 2.34 and later.
-     * Lower 31 bits, no sign bit, are here. */
-    unsigned receiveTimeStampSec;
-#else
+    // time_t may be 32 or 64-bit, depending
     time_t receiveTimeStampSec;
-#endif
     int receiveTimeStampUSec;
     int leap;                   // not leapsecond offset, a notification code
     int precision;              // log(2) of source jitter

We believe that the bug you reported is fixed in the latest version of
gpsd, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1140603@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Boian Bonev <bbonev@ipacct.com> (supplier of updated gpsd package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 13 Aug 2026 18:01:36 +0000
Source: gpsd
Architecture: source
Version: 3.27.5-3
Distribution: unstable
Urgency: medium
Maintainer: Boian Bonev <bbonev@ipacct.com>
Changed-By: Boian Bonev <bbonev@ipacct.com>
Closes: 1140603
Changes:
 gpsd (3.27.5-3) unstable; urgency=medium
 .
   * Add an upstream patch to partially revert the ntpshm.h time_t
     changes, fixing the SHM interface on 32-bit systems with 64-bit
     time_t like armhf (Closes: #1140603)
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 c6343f206dbd730fa6ade7489b3dc6745ceb3521 51364 gpsd_3.27.5-3.debian.tar.xz
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