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1.5 ! deraadt 1: /* $OpenBSD: usbhidaction.c,v 1.4 2004/06/04 00:47:32 deraadt 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;
59: int reparse = 1;
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: }
139:
140: fd = open(dev, O_RDWR);
141: if (fd < 0)
142: err(1, "%s", dev);
143: if (ioctl(fd, USB_GET_REPORT_ID, &reportid) < 0)
144: reportid = -1;
145: repd = hid_get_report_desc(fd);
146: if (repd == NULL)
1.2 jsyn 147: err(1, "hid_get_report_desc() failed");
1.1 nate 148:
149: commands = parse_conf(conf, repd, reportid, ignore);
150:
151: sz = hid_report_size(repd, hid_input, reportid);
152:
153: if (verbose)
154: printf("report size %d\n", sz);
155: if (sz > sizeof buf)
156: errx(1, "report too large");
157:
158: (void)signal(SIGHUP, sighup);
159:
160: if (demon) {
161: if (daemon(0, 0) < 0)
162: err(1, "daemon()");
163: pidfile(NULL);
164: isdemon = 1;
165: }
166:
167: for(;;) {
168: n = read(fd, buf, sz);
169: if (verbose > 2) {
170: printf("read %d bytes:", n);
171: for (i = 0; i < n; i++)
172: printf(" %02x", buf[i]);
173: printf("\n");
174: }
175: if (n < 0) {
176: if (verbose)
177: err(1, "read");
178: else
179: exit(1);
180: }
181: #if 0
182: if (n != sz) {
183: err(2, "read size");
184: }
185: #endif
186: for (cmd = commands; cmd; cmd = cmd->next) {
187: val = hid_get_data(buf, &cmd->item);
188: if (cmd->value == val || cmd->anyvalue)
189: docmd(cmd, val, dev, argc, argv);
190: }
191: if (reparse) {
192: struct command *cmds =
193: parse_conf(conf, repd, reportid, ignore);
194: if (cmds) {
195: freecommands(commands);
196: commands = cmds;
197: }
198: reparse = 0;
199: }
200: }
201:
202: exit(0);
203: }
204:
205: void
206: usage(void)
207: {
208: extern char *__progname;
209:
1.3 jmc 210: fprintf(stderr, "Usage: %s [-div] -c config-file -f device "
211: "arg ...\n", __progname);
1.1 nate 212: exit(1);
213: }
214:
215: static int
216: peek(FILE *f)
217: {
218: int c;
219:
220: c = getc(f);
221: if (c != EOF)
222: ungetc(c, f);
223: return c;
224: }
225:
226: struct command *
227: parse_conf(const char *conf, report_desc_t repd, int reportid, int ignore)
228: {
229: FILE *f;
230: char *p;
231: int line;
232: char buf[SIZE], name[SIZE], value[SIZE], action[SIZE];
233: char usage[SIZE], coll[SIZE];
234: struct command *cmd, *cmds;
235: struct hid_data *d;
236: struct hid_item h;
237: int u, lo, hi, range;
238:
239: f = fopen(conf, "r");
240: if (f == NULL)
241: err(1, "%s", conf);
242:
243: cmds = NULL;
244: for (line = 1; ; line++) {
245: if (fgets(buf, sizeof buf, f) == NULL)
246: break;
247: if (buf[0] == '#' || buf[0] == '\n')
248: continue;
249: p = strchr(buf, '\n');
250: while (p && isspace(peek(f))) {
251: if (fgets(p, sizeof buf - strlen(buf), f) == NULL)
252: break;
253: p = strchr(buf, '\n');
254: }
255: if (p)
256: *p = 0;
257: if (sscanf(buf, "%s %s %[^\n]", name, value, action) != 3) {
258: if (isdemon) {
259: syslog(LOG_WARNING, "config file `%s', line %d"
1.4 deraadt 260: ", syntax error: %s", conf, line, buf);
1.1 nate 261: freecommands(cmds);
262: return (NULL);
263: } else {
264: errx(1, "config file `%s', line %d,"
1.4 deraadt 265: ", syntax error: %s", conf, line, buf);
1.1 nate 266: }
267: }
268:
269: cmd = malloc(sizeof *cmd);
270: if (cmd == NULL)
271: err(1, "malloc failed");
272: cmd->next = cmds;
273: cmds = cmd;
274: cmd->line = line;
275:
276: if (strcmp(value, "*") == 0) {
277: cmd->anyvalue = 1;
278: } else {
279: cmd->anyvalue = 0;
280: if (sscanf(value, "%d", &cmd->value) != 1) {
281: if (isdemon) {
282: syslog(LOG_WARNING,
1.4 deraadt 283: "config file `%s', line %d, "
284: "bad value: %s\n",
285: conf, line, value);
1.1 nate 286: freecommands(cmds);
287: return (NULL);
288: } else {
289: errx(1, "config file `%s', line %d, "
1.4 deraadt 290: "bad value: %s\n",
291: conf, line, value);
1.1 nate 292: }
293: }
294: }
295:
296: coll[0] = 0;
297: for (d = hid_start_parse(repd, 1 << hid_input, reportid);
1.4 deraadt 298: hid_get_item(d, &h); ) {
1.1 nate 299: if (verbose > 2)
300: printf("kind=%d usage=%x\n", h.kind, h.usage);
301: if (h.flags & HIO_CONST)
302: continue;
303: switch (h.kind) {
304: case hid_input:
305: if (h.usage_minimum != 0 ||
306: h.usage_maximum != 0) {
307: lo = h.usage_minimum;
308: hi = h.usage_maximum;
309: range = 1;
310: } else {
311: lo = h.usage;
312: hi = h.usage;
313: range = 0;
314: }
315: for (u = lo; u <= hi; u++) {
316: snprintf(usage, sizeof usage, "%s:%s",
1.4 deraadt 317: hid_usage_page(HID_PAGE(u)),
1.1 nate 318: hid_usage_in_page(u));
319: if (verbose > 2)
320: printf("usage %s\n", usage);
321: if (!strcasecmp(usage, name))
322: goto foundhid;
323: if (coll[0]) {
324: snprintf(usage, sizeof usage,
325: "%s.%s:%s", coll+1,
1.4 deraadt 326: hid_usage_page(HID_PAGE(u)),
1.1 nate 327: hid_usage_in_page(u));
328: if (verbose > 2)
329: printf("usage %s\n",
1.4 deraadt 330: usage);
1.1 nate 331: if (!strcasecmp(usage, name))
332: goto foundhid;
333: }
334: }
335: break;
336: case hid_collection:
337: snprintf(coll + strlen(coll),
338: sizeof coll - strlen(coll), ".%s:%s",
1.4 deraadt 339: hid_usage_page(HID_PAGE(h.usage)),
1.1 nate 340: hid_usage_in_page(h.usage));
341: break;
342: case hid_endcollection:
343: if (coll[0])
344: *strrchr(coll, '.') = 0;
345: break;
346: default:
347: break;
348: }
349: }
350: if (ignore) {
351: if (verbose)
1.2 jsyn 352: warnx("ignore item '%s'", name);
1.1 nate 353: continue;
354: }
355: if (isdemon) {
356: syslog(LOG_WARNING, "config file `%s', line %d, HID "
1.4 deraadt 357: "item not found: `%s'\n", conf, line, name);
1.1 nate 358: freecommands(cmds);
359: return (NULL);
360: } else {
361: errx(1, "config file `%s', line %d, HID item "
1.4 deraadt 362: "not found: `%s'\n", conf, line, name);
1.1 nate 363: }
364:
365: foundhid:
366: hid_end_parse(d);
367: cmd->item = h;
368: cmd->name = strdup(name);
369: cmd->action = strdup(action);
370: if (range) {
371: if (cmd->value == 1)
372: cmd->value = u - lo;
373: else
374: cmd->value = -1;
375: }
376:
377: if (verbose)
378: printf("PARSE:%d %s, %d, '%s'\n", cmd->line, name,
1.4 deraadt 379: cmd->value, cmd->action);
1.1 nate 380: }
381: fclose(f);
382: return (cmds);
383: }
384:
385: void
386: docmd(struct command *cmd, int value, const char *hid, int argc, char **argv)
387: {
388: char cmdbuf[SIZE], *p, *q;
389: size_t len;
390: int n, r;
391:
392: for (p = cmd->action, q = cmdbuf; *p && q < &cmdbuf[SIZE-1]; ) {
393: if (*p == '$') {
394: p++;
395: len = &cmdbuf[SIZE-1] - q;
396: if (isdigit(*p)) {
397: n = strtol(p, &p, 10) - 1;
398: if (n >= 0 && n < argc) {
399: strncpy(q, argv[n], len);
400: q += strlen(q);
401: }
402: } else if (*p == 'V') {
403: p++;
404: snprintf(q, len, "%d", value);
405: q += strlen(q);
406: } else if (*p == 'N') {
407: p++;
408: strncpy(q, cmd->name, len);
409: q += strlen(q);
410: } else if (*p == 'H') {
411: p++;
412: strncpy(q, hid, len);
413: q += strlen(q);
414: } else if (*p) {
415: *q++ = *p++;
416: }
417: } else {
418: *q++ = *p++;
419: }
420: }
421: *q = 0;
422:
423: if (verbose)
424: printf("system '%s'\n", cmdbuf);
425: r = system(cmdbuf);
426: if (verbose > 1 && r)
427: printf("return code = 0x%x\n", r);
428: }
429:
430: void
431: freecommands(struct command *cmd)
432: {
433: struct command *next;
434:
435: while (cmd) {
436: next = cmd->next;
437: free(cmd);
438: cmd = next;
439: }
440: }