[Hamlib-developer] [Hamlib/Hamlib] 4b39d3: Add exclusive mode support to serial port opening

[Nate B. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/Hamlib/Hamlib
  Commit: 4b39d3cd6fbbf2d13ab98d4a4e6c695b443c9e02
      https://github.com/Hamlib/Hamlib/commit/4b39d3cd6fbbf2d13ab98d4a4e6c695b443c9e02
  Author: Ben Woodard <wo...@re...>
  Date:   2026-09-08 (Tue, 08 Sep 2026)

  Changed paths:
    M src/serial.c

  Log Message:
  -----------
  Add exclusive mode support to serial port opening

Add TIOCEXCL ioctl to serial_open() and ser_open() to set exclusive
access on serial ports. This prevents multiple processes from accessing
the same serial port simultaneously, which is critical for radio
control applications.

Also add perror() for close operation failures to improve debugging.

Co-authored-by: Goose <go...@bl...>


  Commit: 6e6fae759320f44178324ffccd6d9ace746cfc10
      https://github.com/Hamlib/Hamlib/commit/6e6fae759320f44178324ffccd6d9ace746cfc10
  Author: Ben Woodard <wo...@re...>
  Date:   2026-09-13 (Sun, 13 Sep 2026)

  Changed paths:
    M NEWS
    M rigs/ats-mini/Makefile.am
    M rigs/ats-mini/ats.c
    M rigs/kenwood/elecraft.c
    M rigs/kenwood/level_gran_kenwood.h
    M rigs/kenwood/ts480.c
    M tests/.gitignore
    M tests/Makefile.am
    M tests/rigmatrix.c
    M tests/testctlparser.c
    A tests/testelecraftvfo.c

  Log Message:
  -----------
  Merge branch 'master' into serial-exclusive


  Commit: 336db268e53f7cd120a0a14de46c2524dd9903b7
      https://github.com/Hamlib/Hamlib/commit/336db268e53f7cd120a0a14de46c2524dd9903b7
  Author: Ben Woodard <wo...@re...>
  Date:   2026-09-16 (Wed, 16 Sep 2026)

  Changed paths:
    M HAMLIB_STREAMING.md
    M HAMLIB_STREAMING_BACKEND_GUIDE.md
    M README.developer
    M doc/man1/rigctld.1
    M include/hamlib/rig.h
    M rigs/dummy/netrigctl.c
    M src/stream.c
    M src/stream_net.c
    M src/stream_proto.c
    M src/stream_proto.h
    M test/test_dummy_stream.c
    M test/test_netrigctl_stream.c
    M test/test_rigctld_commands.c
    M test/test_rigctld_stream.c
    M test/test_stream_api.c
    M tests/rigctl_parse.c
    M tests/rigstreamtest.c

  Log Message:
  -----------
  Merge branch 'master' into serial-exclusive


  Commit: e9ef0cc3b2d41eb28ef255518df808be656dadaf
      https://github.com/Hamlib/Hamlib/commit/e9ef0cc3b2d41eb28ef255518df808be656dadaf
  Author: Ben Woodard <wo...@re...>
  Date:   2026-09-16 (Wed, 16 Sep 2026)

  Changed paths:
    M configure.ac
    M src/serial.c

  Log Message:
  -----------
  Check for TIOCEXCL availability and conditionally compile ioctl calls

The commit 4b39d3c added TIOCEXCL ioctl calls to serial_open() and
ser_open() to set exclusive mode on serial ports. However, TIOCEXCL
is not available on all platforms - notably, it's not defined on
Windows MinGW cross-compile targets, which causes build failures.

This change adds an autoconf test to detect whether TIOCEXCL is
available on the target platform, and conditionally compiles the
exclusive mode ioctl calls only when the constant is defined.

The autoconf test:
- Checks if TIOCEXCL can be used from sys/ioctl.h
- Defines HAVE_TIOCEXCL to 1 if available

The code changes:
- Wrap TIOCEXCL ioctl calls in #ifdef HAVE_TIOCEXCL blocks
- Only set exclusive mode when the platform supports it

This ensures the code compiles on all supported platforms including
Windows MinGW while still providing exclusive mode functionality on
platforms that support it.

Signed-off-by: Ben Woodard AE6BC <kg...@gm...>
Co-authored-by: Goose <go...@bl...>


  Commit: 64d8442ef9dd17a97d5d86d858af3773ff3c1f9c
      https://github.com/Hamlib/Hamlib/commit/64d8442ef9dd17a97d5d86d858af3773ff3c1f9c
  Author: Nate Bargmann <n0...@n0...>
  Date:   2026-09-17 (Thu, 17 Sep 2026)

  Changed paths:
    M configure.ac
    M src/serial.c

  Log Message:
  -----------
  Merge GitHub PR #2200


  Commit: 9b35d7d724514d7a605d961b1101edba864501e4
      https://github.com/Hamlib/Hamlib/commit/9b35d7d724514d7a605d961b1101edba864501e4
  Author: Nate Bargmann <n0...@n0...>
  Date:   2026-09-17 (Thu, 17 Sep 2026)

  Changed paths:
    M NEWS

  Log Message:
  -----------
  Update NEWS for serial port exclusive mode opening


  Commit: 8ab6649a941030d1ac3ee90ee3394dbdd3454ba1
      https://github.com/Hamlib/Hamlib/commit/8ab6649a941030d1ac3ee90ee3394dbdd3454ba1
  Author: Nate Bargmann <n0...@n0...>
  Date:   2026-09-17 (Thu, 17 Sep 2026)

  Changed paths:
    M configure.ac
    M src/serial.c

  Log Message:
  -----------
  Merge branch 'woodard-serial-exclusive'


Compare: https://github.com/Hamlib/Hamlib/compare/336346f135e3...8ab6649a9410

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