Differential D52308 Diff 161723 usr.sbin/virtual_oss/virtual_oss_cmd/command.c

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usr.sbin/virtual_oss/virtual_oss_cmd/command.c

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				/*-
				* Copyright (c) 2021-2022 Hans Petter Selasky
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*/

				#include <stdio.h>
				#include <stdint.h>
				#include <stdlib.h>
				#include <string.h>
				#include <unistd.h>
				#include <err.h>
				#include <sysexits.h>
				#include <stdarg.h>
				#include <fcntl.h>

				#include "virtual_oss.h"

				static void
				message(const char *fmt, ...)
				{
				va_list list;

				va_start(list, fmt);
				vfprintf(stderr, fmt, list);
				va_end(list);
				}

				static void
				usage(void)
				{
				message("Usage: virtual_oss_cmd /dev/vdsp.ctl [command line arguments to pass to virtual_oss]\n");
				exit(EX_USAGE);
				}

				int
				main(int argc, char **argv)
				{
				char options[VIRTUAL_OSS_OPTIONS_MAX] = {};
				size_t offset = 0;
				size_t len = VIRTUAL_OSS_OPTIONS_MAX - 1;
				int fd;

				/* check if no options */
				if (argc < 2)
				usage();

				fd = open(argv[1], O_RDWR);
				if (fd < 0)
				errx(EX_SOFTWARE, "Could not open '%s'", argv[1]);

				for (int x = 2; x != argc; x++) {
				size_t tmp = strlen(argv[x]) + 1;
				if (tmp > len)
				errx(EX_SOFTWARE, "Too many options passed");
				memcpy(options + offset, argv[x], tmp);
				options[offset + tmp - 1] = ' ';
				offset += tmp;
				len -= tmp;
				}

				if (options[0] == 0) {
				struct virtual_oss_system_info info;
				if (ioctl(fd, VIRTUAL_OSS_GET_SYSTEM_INFO, &info) < 0)
				errx(EX_SOFTWARE, "Cannot get system information");

				info.rx_device_name[sizeof(info.rx_device_name) - 1] = 0;
				info.tx_device_name[sizeof(info.tx_device_name) - 1] = 0;

				printf("Sample rate: %u Hz\n"
				"Sample width: %u bits\n"
				"Sample channels: %u\n"
				"Output jitter: %u / %u\n"
				"Input device name: %s\n"
				"Output device name: %s\n",
				info.sample_rate,
				info.sample_bits,
				info.sample_channels,
				info.tx_jitter_down,
				info.tx_jitter_up,
				info.rx_device_name,
				info.tx_device_name);
				} else {
				/* execute options */
				if (ioctl(fd, VIRTUAL_OSS_ADD_OPTIONS, options) < 0)
				errx(EX_SOFTWARE, "One or more invalid options");
				/* show error, if any */
				if (options[0] != '\0')
				errx(EX_SOFTWARE, "%s", options);
				}

				close(fd);
				return (0);
				}