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https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git
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a5ab76da1e
Add the D-Bus API definition and its implementation in the form of a GPIO manager daemon and a companion command-line client as well as some additional configuration and data files (systemd service, example udev configuration, etc.) and test suites. Tested-by: Alexander Sverdlin <alexander.sverdlin@siemens.com> Link: https://lore.kernel.org/r/20240812-dbus-v5-4-ead288509217@linaro.org Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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// SPDX-FileCopyrightText: 2023 Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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#include <stdlib.h>
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#include "common.h"
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int gpiocli_release_main(int argc, char **argv)
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{
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static const gchar *const summary =
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"Release one of the line requests controlled by the manager.";
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g_autoptr(GDBusObjectManager) manager = NULL;
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g_autoptr(GpiodbusObject) obj = NULL;
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g_autofree gchar *obj_path = NULL;
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g_auto(GStrv) remaining = NULL;
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g_autoptr(GError) err = NULL;
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const gchar *request_name;
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GpiodbusRequest *request;
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gboolean ret;
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const GOptionEntry opts[] = {
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{
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.long_name = G_OPTION_REMAINING,
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.flags = G_OPTION_FLAG_NONE,
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.arg = G_OPTION_ARG_STRING_ARRAY,
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.arg_data = &remaining,
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.arg_description = "<request>",
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},
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{ }
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};
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parse_options(opts, summary, NULL, &argc, &argv);
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if (!remaining || g_strv_length(remaining) != 1)
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die_parsing_opts("Exactly one request to release must be specified.");
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check_manager();
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request_name = remaining[0];
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obj_path = make_request_obj_path(request_name);
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manager = get_object_manager_client("/io/gpiod1/requests");
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obj = GPIODBUS_OBJECT(g_dbus_object_manager_get_object(manager,
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obj_path));
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if (!obj)
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goto no_request;
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request = gpiodbus_object_peek_request(obj);
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if (!request)
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goto no_request;
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ret = gpiodbus_request_call_release_sync(request,
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G_DBUS_CALL_FLAGS_NONE,
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-1, NULL, &err);
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if (!ret)
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die_gerror(err, "Failed to release request '%s': %s",
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request_name, err->message);
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return EXIT_SUCCESS;
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no_request:
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die("No such request: '%s'", request_name);
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}
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