[PATCH RFC libgpiod 0/3] tools: new tool - gpioctl

[Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>]

Here's is something I've had in the works for about a year now. It's
supposed to address the biggest issue with gpioset, namely the lack of
persistence beyond the process' lifetime by working somewhat similarly
to tmux: spawning a daemon on first invocation that retains the state
for a particular user. This daemon listens on a unix socket and can
handle clients that are different processes executed over time.

It's finally in a state where I'm happy showing it to others, so please
take a look.

--

Provide gpioctl, a new command-line tool for persistent GPIO line control.
Unlike gpioget and gpioset which release lines on exit, gpioctl holds
requested lines in a background daemon so their state survives across
multiple client invocations.

Before adding the new program: move some code we'll reuse out of gpioset
and gpiomon and into tools-common.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
Bartosz Golaszewski (3):
      tools: factor out line value parsing into tools-common
      tools: factor out line event formatting into tools-common
      tools: implement gpioctl

 TODO                        |   14 -
 docs/.gitignore             |    2 +
 docs/conf.py                |    8 +
 docs/gpio_tools.rst         |   10 +-
 docs/gpioctl_top.rst        |  156 +++
 man/meson.build             |   39 +
 tools/gpio-tools-test.bash  | 1756 ++++++++++++++++++++++++++
 tools/gpioctl-test-helper.c |   58 +
 tools/gpioctl.c             | 2838 +++++++++++++++++++++++++++++++++++++++++++
 tools/gpiomon.c             |  128 +-
 tools/gpioset.c             |   91 +-
 tools/meson.build           |   21 +-
 tools/tools-common.c        |  180 ++-
 tools/tools-common.h        |    9 +
 14 files changed, 5091 insertions(+), 219 deletions(-)
---
base-commit: 25c56387337390bbbe42d145faa829c35f9c0611
change-id: 20251001-gpioctl-336556e702fd

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>