tools: gpio: Print error string on IOCTL failures (d327a224) · Commits · 戴 / test

tools/gpio/gpio-utils.c

+10 −7

Original line number	Diff line number	Diff line
		@@ -76,7 +76,8 @@ int gpiotools_request_linehandle(const char device_name, unsigned int lines,
		fd = open(chrdev_name, 0);
		if (fd == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to open %s\n", chrdev_name);
		fprintf(stderr, "Failed to open %s, %s\n",
		chrdev_name, strerror(errno));
		goto exit_close_error;
		}

		@@ -92,8 +93,8 @@ int gpiotools_request_linehandle(const char device_name, unsigned int lines,
		ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req);
		if (ret == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to issue GET LINEHANDLE IOCTL (%d)\n",
		ret);
		fprintf(stderr, "Failed to issue %s (%d), %s\n",
		"GPIO_GET_LINEHANDLE_IOCTL", ret, strerror(errno));
		}

		exit_close_error:
		@@ -118,8 +119,9 @@ int gpiotools_set_values(const int fd, struct gpiohandle_data *data)
		ret = ioctl(fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, data);
		if (ret == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to issue %s (%d)\n",
		"GPIOHANDLE_SET_LINE_VALUES_IOCTL", ret);
		fprintf(stderr, "Failed to issue %s (%d), %s\n",
		"GPIOHANDLE_SET_LINE_VALUES_IOCTL", ret,
		strerror(errno));
		}

		return ret;
		@@ -141,8 +143,9 @@ int gpiotools_get_values(const int fd, struct gpiohandle_data *data)
		ret = ioctl(fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, data);
		if (ret == -1) {
		ret = -errno;
		fprintf(stderr, "Failed to issue %s (%d)\n",
		"GPIOHANDLE_GET_LINE_VALUES_IOCTL", ret);
		fprintf(stderr, "Failed to issue %s (%d), %s\n",
		"GPIOHANDLE_GET_LINE_VALUES_IOCTL", ret,
		strerror(errno));
		}

		return ret;