Return to usbhidaction.c CVS log

Up to [local] / src / usr.bin / usbhidaction

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.

OK deraadt@

/*	$OpenBSD: usbhidaction.c,v 1.10 2008/06/26 05:42:21 ray Exp $ */
/*      $NetBSD: usbhidaction.c,v 1.7 2002/01/18 14:38:59 augustss Exp $ */

/*
 * Copyright (c) 2000, 2002 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson <lennart@augustsson.net>.
 *
 * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <limits.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <usbhid.h>
#include <util.h>
#include <syslog.h>
#include <signal.h>

int verbose = 0;
int isdemon = 0;

volatile sig_atomic_t reparse = 0;

struct command {
	struct command *next;
	int line;

	struct hid_item item;
	int value;
	char anyvalue;
	char *name;
	char *action;
};
struct command *commands;

#define SIZE 4000

void usage(void);
struct command *parse_conf(const char *, report_desc_t, int, int);
void docmd(struct command *, int, const char *, int, char **);
void freecommands(struct command *);

/* ARGSUSED */
static void
sighup(int signo)
{
	reparse = 1;
}

int
main(int argc, char **argv)
{
	const char *conf = NULL;
	const char *dev = NULL;
	int fd, ch, sz, n, val, i;
	int demon, ignore;
	report_desc_t repd;
	char buf[100];
	char devnamebuf[PATH_MAX];
	struct command *cmd;
	int reportid;

	demon = 1;
	ignore = 0;
	while ((ch = getopt(argc, argv, "c:df:iv")) != -1) {
		switch(ch) {
		case 'c':
			conf = optarg;
			break;
		case 'd':
			demon ^= 1;
			break;
		case 'i':
			ignore++;
			break;
		case 'f':
			dev = optarg;
			break;
		case 'v':
			demon = 0;
			verbose++;
			break;
		case '?':
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (conf == NULL || dev == NULL)
		usage();

	if (hid_start(NULL) == -1)
		errx(1, "hid_init");

	if (dev[0] != '/') {
		snprintf(devnamebuf, sizeof(devnamebuf), "/dev/%s%s",
		    isdigit(dev[0]) ? "uhid" : "", dev);
		dev = devnamebuf;
	}

	if (demon && conf[0] != '/')
		errx(1, "config file must have an absolute path, %s", conf);

	fd = open(dev, O_RDWR);
	if (fd < 0)
		err(1, "%s", dev);

	/* Avoid passing the device file descriptor to executed commands */
	if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
		err(1, "fcntl(F_SETFD, FD_CLOEXEC)");

	if (ioctl(fd, USB_GET_REPORT_ID, &reportid) < 0)
		reportid = -1;
	repd = hid_get_report_desc(fd);
	if (repd == NULL)
		err(1, "hid_get_report_desc() failed");

	commands = parse_conf(conf, repd, reportid, ignore);

	sz = hid_report_size(repd, hid_input, reportid);

	if (verbose)
		printf("report size %d\n", sz);
	if (sz > sizeof buf)
		errx(1, "report too large");

	(void)signal(SIGHUP, sighup);

	if (demon) {
		if (daemon(0, 0) < 0)
			err(1, "daemon()");
		pidfile(NULL);
		isdemon = 1;
	}

	for(;;) {
		n = read(fd, buf, sz);
		if (verbose > 2) {
			printf("read %d bytes:", n);
			for (i = 0; i < n; i++)
				printf(" %02x", buf[i]);
			printf("\n");
		}
		if (n < 0) {
			if (verbose)
				err(1, "read");
			else
				exit(1);
		}
#if 0
		if (n != sz) {
			err(2, "read size");
		}
#endif
		for (cmd = commands; cmd; cmd = cmd->next) {
			val = hid_get_data(buf, &cmd->item);
			if (cmd->value == val || cmd->anyvalue)
				docmd(cmd, val, dev, argc, argv);
		}
		if (reparse) {
			struct command *cmds =
			    parse_conf(conf, repd, reportid, ignore);
			if (cmds) {
				freecommands(commands);
				commands = cmds;
			}
			reparse = 0;
		}
	}

	exit(0);
}

void
usage(void)
{
	extern char *__progname;

	fprintf(stderr, "Usage: %s [-div] -c config-file -f device "
		"arg ...\n", __progname);
	exit(1);
}

static int
peek(FILE *f)
{
	int c;

	c = getc(f);
	if (c != EOF)
		ungetc(c, f);
	return c;
}

struct command *
parse_conf(const char *conf, report_desc_t repd, int reportid, int ignore)
{
	FILE *f;
	char *p;
	int line;
	char buf[SIZE], name[SIZE], value[SIZE], action[SIZE];
	char usage[SIZE], coll[SIZE];
	struct command *cmd, *cmds;
	struct hid_data *d;
	struct hid_item h;
	int u, lo, hi, range;

	f = fopen(conf, "r");
	if (f == NULL)
		err(1, "%s", conf);

	cmds = NULL;
	for (line = 1; ; line++) {
		if (fgets(buf, sizeof buf, f) == NULL)
			break;
		if (buf[0] == '#' || buf[0] == '\n')
			continue;
		p = strchr(buf, '\n');
		while (p && isspace(peek(f))) {
			if (fgets(p, sizeof buf - strlen(buf), f) == NULL)
				break;
			p = strchr(buf, '\n');
		}
		if (p)
			*p = 0;
		if (sscanf(buf, "%s %s %[^\n]", name, value, action) != 3) {
			if (isdemon) {
				syslog(LOG_WARNING, "config file `%s', line %d"
				    ", syntax error: %s", conf, line, buf);
				freecommands(cmds);
				return (NULL);
			} else {
				errx(1, "config file `%s', line %d"
				    ", syntax error: %s", conf, line, buf);
			}
		}

		cmd = malloc(sizeof *cmd);
		if (cmd == NULL)
			err(1, "malloc failed");
		cmd->next = cmds;
		cmds = cmd;
		cmd->line = line;

		if (strcmp(value, "*") == 0) {
			cmd->anyvalue = 1;
		} else {
			cmd->anyvalue = 0;
			if (sscanf(value, "%d", &cmd->value) != 1) {
				if (isdemon) {
					syslog(LOG_WARNING,
					    "config file `%s', line %d, "
					    "bad value: %s",
					    conf, line, value);
					freecommands(cmds);
					return (NULL);
				} else {
					errx(1, "config file `%s', line %d, "
					    "bad value: %s",
					    conf, line, value);
				}
			}
		}

		coll[0] = 0;
		for (d = hid_start_parse(repd, 1 << hid_input, reportid);
		    hid_get_item(d, &h); ) {
			if (verbose > 2)
				printf("kind=%d usage=%x\n", h.kind, h.usage);
			if (h.flags & HIO_CONST)
				continue;
			switch (h.kind) {
			case hid_input:
				if (h.usage_minimum != 0 ||
				    h.usage_maximum != 0) {
					lo = h.usage_minimum;
					hi = h.usage_maximum;
					range = 1;
				} else {
					lo = h.usage;
					hi = h.usage;
					range = 0;
				}
				for (u = lo; u <= hi; u++) {
					snprintf(usage, sizeof usage,  "%s:%s",
						 hid_usage_page(HID_PAGE(u)),
						 hid_usage_in_page(u));
					if (verbose > 2)
						printf("usage %s\n", usage);
					if (!strcasecmp(usage, name))
						goto foundhid;
					if (coll[0]) {
						snprintf(usage, sizeof usage,
						  "%s.%s:%s", coll+1,
						  hid_usage_page(HID_PAGE(u)),
						  hid_usage_in_page(u));
						if (verbose > 2)
							printf("usage %s\n",
							    usage);
						if (!strcasecmp(usage, name))
							goto foundhid;
					}
				}
				break;
			case hid_collection:
				snprintf(coll + strlen(coll),
				    sizeof coll - strlen(coll),  ".%s:%s",
				    hid_usage_page(HID_PAGE(h.usage)),
				    hid_usage_in_page(h.usage));
				break;
			case hid_endcollection:
				if (coll[0])
					*strrchr(coll, '.') = 0;
				break;
			default:
				break;
			}
		}
		if (ignore) {
			if (verbose)
				warnx("ignore item '%s'", name);
			continue;
		}
		if (isdemon) {
			syslog(LOG_WARNING, "config file `%s', line %d, HID "
			    "item not found: `%s'", conf, line, name);
			freecommands(cmds);
			return (NULL);
		} else {
			errx(1, "config file `%s', line %d, HID item "
			    "not found: `%s'", conf, line, name);
		}

	foundhid:
		hid_end_parse(d);
		cmd->item = h;
		cmd->name = strdup(name);
		cmd->action = strdup(action);
		if (range) {
			if (cmd->value == 1)
				cmd->value = u - lo;
			else
				cmd->value = -1;
		}

		if (verbose)
			printf("PARSE:%d %s, %d, '%s'\n", cmd->line, name,
			    cmd->value, cmd->action);
	}
	fclose(f);
	return (cmds);
}

void
docmd(struct command *cmd, int value, const char *hid, int argc, char **argv)
{
	char cmdbuf[SIZE], *p, *q;
	size_t len;
	int n, r;

	for (p = cmd->action, q = cmdbuf; *p && q < &cmdbuf[SIZE-1]; ) {
		if (*p == '$') {
			p++;
			len = &cmdbuf[SIZE-1] - q;
			if (isdigit(*p)) {
				n = strtol(p, &p, 10) - 1;
				if (n >= 0 && n < argc) {
					strncpy(q, argv[n], len);
					q += strlen(q);
				}
			} else if (*p == 'V') {
				p++;
				snprintf(q, len, "%d", value);
				q += strlen(q);
			} else if (*p == 'N') {
				p++;
				strncpy(q, cmd->name, len);
				q += strlen(q);
			} else if (*p == 'H') {
				p++;
				strncpy(q, hid, len);
				q += strlen(q);
			} else if (*p) {
				*q++ = *p++;
			}
		} else {
			*q++ = *p++;
		}
	}
	*q = 0;

	if (verbose)
		printf("system '%s'\n", cmdbuf);
	r = system(cmdbuf);
	if (verbose > 1 && r)
		printf("return code = 0x%x\n", r);
}

void
freecommands(struct command *cmd)
{
	struct command *next;

	while (cmd) {
		next = cmd->next;
		free(cmd);
		cmd = next;
	}
}