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1.8 ! mk 1: /* $OpenBSD: usbhidaction.c,v 1.7 2006/04/23 08:51:24 fgsch Exp $ */
1.1 nate 2: /* $NetBSD: usbhidaction.c,v 1.7 2002/01/18 14:38:59 augustss Exp $ */
3:
4: /*
5: * Copyright (c) 2000, 2002 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Lennart Augustsson <lennart@augustsson.net>.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the NetBSD
22: * Foundation, Inc. and its contributors.
23: * 4. Neither the name of The NetBSD Foundation nor the names of its
24: * contributors may be used to endorse or promote products derived
25: * from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: #include <stdio.h>
41: #include <stdlib.h>
42: #include <string.h>
43: #include <ctype.h>
44: #include <err.h>
45: #include <fcntl.h>
46: #include <limits.h>
47: #include <unistd.h>
48: #include <sys/types.h>
49: #include <sys/ioctl.h>
50: #include <dev/usb/usb.h>
51: #include <dev/usb/usbhid.h>
52: #include <usbhid.h>
53: #include <util.h>
54: #include <syslog.h>
55: #include <signal.h>
56:
57: int verbose = 0;
58: int isdemon = 0;
1.8 ! mk 59: int reparse = 0;
1.1 nate 60:
61: struct command {
62: struct command *next;
63: int line;
64:
65: struct hid_item item;
66: int value;
67: char anyvalue;
68: char *name;
69: char *action;
70: };
71: struct command *commands;
72:
73: #define SIZE 4000
74:
75: void usage(void);
76: struct command *parse_conf(const char *, report_desc_t, int, int);
77: void docmd(struct command *, int, const char *, int, char **);
78: void freecommands(struct command *);
79:
1.5 deraadt 80: /* ARGSUSED */
1.1 nate 81: static void
1.5 deraadt 82: sighup(int signo)
1.1 nate 83: {
84: reparse = 1;
85: }
86:
87: int
88: main(int argc, char **argv)
89: {
90: const char *conf = NULL;
91: const char *dev = NULL;
92: int fd, ch, sz, n, val, i;
93: int demon, ignore;
94: report_desc_t repd;
95: char buf[100];
96: char devnamebuf[PATH_MAX];
97: struct command *cmd;
98: int reportid;
99:
100: demon = 1;
101: ignore = 0;
102: while ((ch = getopt(argc, argv, "c:df:iv")) != -1) {
103: switch(ch) {
104: case 'c':
105: conf = optarg;
106: break;
107: case 'd':
108: demon ^= 1;
109: break;
110: case 'i':
111: ignore++;
112: break;
113: case 'f':
114: dev = optarg;
115: break;
116: case 'v':
117: demon = 0;
118: verbose++;
119: break;
120: case '?':
121: default:
122: usage();
123: }
124: }
125: argc -= optind;
126: argv += optind;
127:
128: if (conf == NULL || dev == NULL)
129: usage();
130:
1.4 deraadt 131: if (hid_start(NULL) == -1)
132: errx(1, "hid_init");
1.1 nate 133:
134: if (dev[0] != '/') {
135: snprintf(devnamebuf, sizeof(devnamebuf), "/dev/%s%s",
1.4 deraadt 136: isdigit(dev[0]) ? "uhid" : "", dev);
1.1 nate 137: dev = devnamebuf;
138: }
1.8 ! mk 139:
! 140: if (demon && conf[0] != '/')
! 141: errx(1, "config file must have an absolute path, %s", conf);
1.1 nate 142:
143: fd = open(dev, O_RDWR);
144: if (fd < 0)
145: err(1, "%s", dev);
1.7 fgsch 146:
147: /* Avoid passing the device file descriptor to executed commands */
148: if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
149: err(1, "fcntl(F_SETFD, FD_CLOEXEC)");
150:
1.1 nate 151: if (ioctl(fd, USB_GET_REPORT_ID, &reportid) < 0)
152: reportid = -1;
153: repd = hid_get_report_desc(fd);
154: if (repd == NULL)
1.2 jsyn 155: err(1, "hid_get_report_desc() failed");
1.1 nate 156:
157: commands = parse_conf(conf, repd, reportid, ignore);
158:
159: sz = hid_report_size(repd, hid_input, reportid);
160:
161: if (verbose)
162: printf("report size %d\n", sz);
163: if (sz > sizeof buf)
164: errx(1, "report too large");
165:
166: (void)signal(SIGHUP, sighup);
167:
168: if (demon) {
169: if (daemon(0, 0) < 0)
170: err(1, "daemon()");
171: pidfile(NULL);
172: isdemon = 1;
173: }
174:
175: for(;;) {
176: n = read(fd, buf, sz);
177: if (verbose > 2) {
178: printf("read %d bytes:", n);
179: for (i = 0; i < n; i++)
180: printf(" %02x", buf[i]);
181: printf("\n");
182: }
183: if (n < 0) {
184: if (verbose)
185: err(1, "read");
186: else
187: exit(1);
188: }
189: #if 0
190: if (n != sz) {
191: err(2, "read size");
192: }
193: #endif
194: for (cmd = commands; cmd; cmd = cmd->next) {
195: val = hid_get_data(buf, &cmd->item);
196: if (cmd->value == val || cmd->anyvalue)
197: docmd(cmd, val, dev, argc, argv);
198: }
199: if (reparse) {
200: struct command *cmds =
201: parse_conf(conf, repd, reportid, ignore);
202: if (cmds) {
203: freecommands(commands);
204: commands = cmds;
205: }
206: reparse = 0;
207: }
208: }
209:
210: exit(0);
211: }
212:
213: void
214: usage(void)
215: {
216: extern char *__progname;
217:
1.3 jmc 218: fprintf(stderr, "Usage: %s [-div] -c config-file -f device "
219: "arg ...\n", __progname);
1.1 nate 220: exit(1);
221: }
222:
223: static int
224: peek(FILE *f)
225: {
226: int c;
227:
228: c = getc(f);
229: if (c != EOF)
230: ungetc(c, f);
231: return c;
232: }
233:
234: struct command *
235: parse_conf(const char *conf, report_desc_t repd, int reportid, int ignore)
236: {
237: FILE *f;
238: char *p;
239: int line;
240: char buf[SIZE], name[SIZE], value[SIZE], action[SIZE];
241: char usage[SIZE], coll[SIZE];
242: struct command *cmd, *cmds;
243: struct hid_data *d;
244: struct hid_item h;
245: int u, lo, hi, range;
246:
247: f = fopen(conf, "r");
248: if (f == NULL)
249: err(1, "%s", conf);
250:
251: cmds = NULL;
252: for (line = 1; ; line++) {
253: if (fgets(buf, sizeof buf, f) == NULL)
254: break;
255: if (buf[0] == '#' || buf[0] == '\n')
256: continue;
257: p = strchr(buf, '\n');
258: while (p && isspace(peek(f))) {
259: if (fgets(p, sizeof buf - strlen(buf), f) == NULL)
260: break;
261: p = strchr(buf, '\n');
262: }
263: if (p)
264: *p = 0;
265: if (sscanf(buf, "%s %s %[^\n]", name, value, action) != 3) {
266: if (isdemon) {
267: syslog(LOG_WARNING, "config file `%s', line %d"
1.4 deraadt 268: ", syntax error: %s", conf, line, buf);
1.1 nate 269: freecommands(cmds);
270: return (NULL);
271: } else {
1.6 jaredy 272: errx(1, "config file `%s', line %d"
1.4 deraadt 273: ", syntax error: %s", conf, line, buf);
1.1 nate 274: }
275: }
276:
277: cmd = malloc(sizeof *cmd);
278: if (cmd == NULL)
279: err(1, "malloc failed");
280: cmd->next = cmds;
281: cmds = cmd;
282: cmd->line = line;
283:
284: if (strcmp(value, "*") == 0) {
285: cmd->anyvalue = 1;
286: } else {
287: cmd->anyvalue = 0;
288: if (sscanf(value, "%d", &cmd->value) != 1) {
289: if (isdemon) {
290: syslog(LOG_WARNING,
1.4 deraadt 291: "config file `%s', line %d, "
1.6 jaredy 292: "bad value: %s",
1.4 deraadt 293: conf, line, value);
1.1 nate 294: freecommands(cmds);
295: return (NULL);
296: } else {
297: errx(1, "config file `%s', line %d, "
1.6 jaredy 298: "bad value: %s",
1.4 deraadt 299: conf, line, value);
1.1 nate 300: }
301: }
302: }
303:
304: coll[0] = 0;
305: for (d = hid_start_parse(repd, 1 << hid_input, reportid);
1.4 deraadt 306: hid_get_item(d, &h); ) {
1.1 nate 307: if (verbose > 2)
308: printf("kind=%d usage=%x\n", h.kind, h.usage);
309: if (h.flags & HIO_CONST)
310: continue;
311: switch (h.kind) {
312: case hid_input:
313: if (h.usage_minimum != 0 ||
314: h.usage_maximum != 0) {
315: lo = h.usage_minimum;
316: hi = h.usage_maximum;
317: range = 1;
318: } else {
319: lo = h.usage;
320: hi = h.usage;
321: range = 0;
322: }
323: for (u = lo; u <= hi; u++) {
324: snprintf(usage, sizeof usage, "%s:%s",
1.4 deraadt 325: hid_usage_page(HID_PAGE(u)),
1.1 nate 326: hid_usage_in_page(u));
327: if (verbose > 2)
328: printf("usage %s\n", usage);
329: if (!strcasecmp(usage, name))
330: goto foundhid;
331: if (coll[0]) {
332: snprintf(usage, sizeof usage,
333: "%s.%s:%s", coll+1,
1.4 deraadt 334: hid_usage_page(HID_PAGE(u)),
1.1 nate 335: hid_usage_in_page(u));
336: if (verbose > 2)
337: printf("usage %s\n",
1.4 deraadt 338: usage);
1.1 nate 339: if (!strcasecmp(usage, name))
340: goto foundhid;
341: }
342: }
343: break;
344: case hid_collection:
345: snprintf(coll + strlen(coll),
346: sizeof coll - strlen(coll), ".%s:%s",
1.4 deraadt 347: hid_usage_page(HID_PAGE(h.usage)),
1.1 nate 348: hid_usage_in_page(h.usage));
349: break;
350: case hid_endcollection:
351: if (coll[0])
352: *strrchr(coll, '.') = 0;
353: break;
354: default:
355: break;
356: }
357: }
358: if (ignore) {
359: if (verbose)
1.2 jsyn 360: warnx("ignore item '%s'", name);
1.1 nate 361: continue;
362: }
363: if (isdemon) {
364: syslog(LOG_WARNING, "config file `%s', line %d, HID "
1.6 jaredy 365: "item not found: `%s'", conf, line, name);
1.1 nate 366: freecommands(cmds);
367: return (NULL);
368: } else {
369: errx(1, "config file `%s', line %d, HID item "
1.6 jaredy 370: "not found: `%s'", conf, line, name);
1.1 nate 371: }
372:
373: foundhid:
374: hid_end_parse(d);
375: cmd->item = h;
376: cmd->name = strdup(name);
377: cmd->action = strdup(action);
378: if (range) {
379: if (cmd->value == 1)
380: cmd->value = u - lo;
381: else
382: cmd->value = -1;
383: }
384:
385: if (verbose)
386: printf("PARSE:%d %s, %d, '%s'\n", cmd->line, name,
1.4 deraadt 387: cmd->value, cmd->action);
1.1 nate 388: }
389: fclose(f);
390: return (cmds);
391: }
392:
393: void
394: docmd(struct command *cmd, int value, const char *hid, int argc, char **argv)
395: {
396: char cmdbuf[SIZE], *p, *q;
397: size_t len;
398: int n, r;
399:
400: for (p = cmd->action, q = cmdbuf; *p && q < &cmdbuf[SIZE-1]; ) {
401: if (*p == '$') {
402: p++;
403: len = &cmdbuf[SIZE-1] - q;
404: if (isdigit(*p)) {
405: n = strtol(p, &p, 10) - 1;
406: if (n >= 0 && n < argc) {
407: strncpy(q, argv[n], len);
408: q += strlen(q);
409: }
410: } else if (*p == 'V') {
411: p++;
412: snprintf(q, len, "%d", value);
413: q += strlen(q);
414: } else if (*p == 'N') {
415: p++;
416: strncpy(q, cmd->name, len);
417: q += strlen(q);
418: } else if (*p == 'H') {
419: p++;
420: strncpy(q, hid, len);
421: q += strlen(q);
422: } else if (*p) {
423: *q++ = *p++;
424: }
425: } else {
426: *q++ = *p++;
427: }
428: }
429: *q = 0;
430:
431: if (verbose)
432: printf("system '%s'\n", cmdbuf);
433: r = system(cmdbuf);
434: if (verbose > 1 && r)
435: printf("return code = 0x%x\n", r);
436: }
437:
438: void
439: freecommands(struct command *cmd)
440: {
441: struct command *next;
442:
443: while (cmd) {
444: next = cmd->next;
445: free(cmd);
446: cmd = next;
447: }
448: }