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1.22 ! krw 1: /* $OpenBSD: usbhidaction.c,v 1.21 2015/10/26 10:08:14 jung 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: *
20: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30: * POSSIBILITY OF SUCH DAMAGE.
31: */
32:
33: #include <stdio.h>
34: #include <stdlib.h>
35: #include <string.h>
36: #include <ctype.h>
37: #include <err.h>
38: #include <fcntl.h>
39: #include <limits.h>
40: #include <unistd.h>
41: #include <sys/types.h>
42: #include <sys/ioctl.h>
43: #include <dev/usb/usb.h>
44: #include <dev/usb/usbhid.h>
45: #include <usbhid.h>
46: #include <syslog.h>
47: #include <signal.h>
1.15 jasper 48: #include <paths.h>
1.1 nate 49:
50: int verbose = 0;
51: int isdemon = 0;
1.9 deraadt 52:
53: volatile sig_atomic_t reparse = 0;
1.1 nate 54:
55: struct command {
56: struct command *next;
57: int line;
58:
59: struct hid_item item;
60: int value;
61: char anyvalue;
62: char *name;
63: char *action;
64: };
65: struct command *commands;
66:
67: #define SIZE 4000
68:
69: void usage(void);
70: struct command *parse_conf(const char *, report_desc_t, int, int);
71: void docmd(struct command *, int, const char *, int, char **);
72: void freecommands(struct command *);
73:
1.5 deraadt 74: /* ARGSUSED */
1.1 nate 75: static void
1.5 deraadt 76: sighup(int signo)
1.1 nate 77: {
78: reparse = 1;
79: }
80:
81: int
82: main(int argc, char **argv)
83: {
84: const char *conf = NULL;
85: const char *dev = NULL;
86: int fd, ch, sz, n, val, i;
87: int demon, ignore;
88: report_desc_t repd;
89: char buf[100];
90: char devnamebuf[PATH_MAX];
91: struct command *cmd;
92: int reportid;
93:
94: demon = 1;
95: ignore = 0;
96: while ((ch = getopt(argc, argv, "c:df:iv")) != -1) {
97: switch(ch) {
98: case 'c':
99: conf = optarg;
100: break;
101: case 'd':
102: demon ^= 1;
103: break;
104: case 'i':
105: ignore++;
106: break;
107: case 'f':
108: dev = optarg;
109: break;
110: case 'v':
111: demon = 0;
112: verbose++;
113: break;
114: case '?':
115: default:
116: usage();
117: }
118: }
119: argc -= optind;
120: argv += optind;
121:
122: if (conf == NULL || dev == NULL)
123: usage();
124:
1.4 deraadt 125: if (hid_start(NULL) == -1)
126: errx(1, "hid_init");
1.1 nate 127:
128: if (dev[0] != '/') {
129: snprintf(devnamebuf, sizeof(devnamebuf), "/dev/%s%s",
1.17 deraadt 130: isdigit((unsigned char)dev[0]) ? "uhid" : "", dev);
1.1 nate 131: dev = devnamebuf;
132: }
1.8 mk 133:
134: if (demon && conf[0] != '/')
135: errx(1, "config file must have an absolute path, %s", conf);
1.1 nate 136:
1.18 guenther 137: fd = open(dev, O_RDWR | O_CLOEXEC);
1.1 nate 138: if (fd < 0)
139: err(1, "%s", dev);
1.7 fgsch 140:
1.1 nate 141: if (ioctl(fd, USB_GET_REPORT_ID, &reportid) < 0)
142: reportid = -1;
143: repd = hid_get_report_desc(fd);
144: if (repd == NULL)
1.2 jsyn 145: err(1, "hid_get_report_desc() failed");
1.1 nate 146:
147: commands = parse_conf(conf, repd, reportid, ignore);
148:
149: sz = hid_report_size(repd, hid_input, reportid);
150:
151: if (verbose)
152: printf("report size %d\n", sz);
153: if (sz > sizeof buf)
154: errx(1, "report too large");
155:
156: (void)signal(SIGHUP, sighup);
1.16 robert 157:
158: /* we do not care about the children, so ignore them */
159: (void)signal(SIGCHLD, SIG_IGN);
1.1 nate 160:
161: if (demon) {
162: if (daemon(0, 0) < 0)
163: err(1, "daemon()");
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 (n != sz) {
182: err(2, "read size");
183: }
184: for (cmd = commands; cmd; cmd = cmd->next) {
185: val = hid_get_data(buf, &cmd->item);
186: if (cmd->value == val || cmd->anyvalue)
187: docmd(cmd, val, dev, argc, argv);
188: }
189: if (reparse) {
190: struct command *cmds =
191: parse_conf(conf, repd, reportid, ignore);
192: if (cmds) {
193: freecommands(commands);
194: commands = cmds;
195: }
196: reparse = 0;
197: }
198: }
199:
200: exit(0);
201: }
202:
203: void
204: usage(void)
205: {
206: extern char *__progname;
207:
1.12 sobrado 208: fprintf(stderr, "usage: %s [-div] -c config-file -f device arg ...\n",
209: __progname);
1.1 nate 210: exit(1);
211: }
212:
213: static int
214: peek(FILE *f)
215: {
216: int c;
217:
218: c = getc(f);
219: if (c != EOF)
220: ungetc(c, f);
221: return c;
222: }
223:
224: struct command *
225: parse_conf(const char *conf, report_desc_t repd, int reportid, int ignore)
226: {
227: FILE *f;
228: char *p;
229: int line;
230: char buf[SIZE], name[SIZE], value[SIZE], action[SIZE];
231: char usage[SIZE], coll[SIZE];
232: struct command *cmd, *cmds;
233: struct hid_data *d;
234: struct hid_item h;
235: int u, lo, hi, range;
236:
237: f = fopen(conf, "r");
238: if (f == NULL)
239: err(1, "%s", conf);
240:
241: cmds = NULL;
242: for (line = 1; ; line++) {
243: if (fgets(buf, sizeof buf, f) == NULL)
244: break;
245: if (buf[0] == '#' || buf[0] == '\n')
246: continue;
247: p = strchr(buf, '\n');
248: while (p && isspace(peek(f))) {
249: if (fgets(p, sizeof buf - strlen(buf), f) == NULL)
250: break;
251: p = strchr(buf, '\n');
252: }
253: if (p)
254: *p = 0;
255: if (sscanf(buf, "%s %s %[^\n]", name, value, action) != 3) {
256: if (isdemon) {
257: syslog(LOG_WARNING, "config file `%s', line %d"
1.4 deraadt 258: ", syntax error: %s", conf, line, buf);
1.1 nate 259: freecommands(cmds);
1.11 guenther 260: fclose(f);
1.1 nate 261: return (NULL);
262: } else {
1.6 jaredy 263: errx(1, "config file `%s', line %d"
1.4 deraadt 264: ", syntax error: %s", conf, line, buf);
1.1 nate 265: }
266: }
267:
268: cmd = malloc(sizeof *cmd);
269: if (cmd == NULL)
270: err(1, "malloc failed");
271: cmd->next = cmds;
272: cmds = cmd;
273: cmd->line = line;
274:
275: if (strcmp(value, "*") == 0) {
276: cmd->anyvalue = 1;
277: } else {
278: cmd->anyvalue = 0;
279: if (sscanf(value, "%d", &cmd->value) != 1) {
280: if (isdemon) {
281: syslog(LOG_WARNING,
1.4 deraadt 282: "config file `%s', line %d, "
1.6 jaredy 283: "bad value: %s",
1.4 deraadt 284: conf, line, value);
1.1 nate 285: freecommands(cmds);
1.11 guenther 286: fclose(f);
1.1 nate 287: return (NULL);
288: } else {
289: errx(1, "config file `%s', line %d, "
1.6 jaredy 290: "bad value: %s",
1.4 deraadt 291: conf, line, value);
1.1 nate 292: }
293: }
294: }
295:
296: coll[0] = 0;
1.11 guenther 297: d = hid_start_parse(repd, 1 << hid_input, reportid);
298: if (d == NULL)
299: err(1, "hid_start_parse failed");
300: while (hid_get_item(d, &h)) {
1.1 nate 301: if (verbose > 2)
302: printf("kind=%d usage=%x\n", h.kind, h.usage);
303: if (h.flags & HIO_CONST)
304: continue;
305: switch (h.kind) {
306: case hid_input:
307: if (h.usage_minimum != 0 ||
308: h.usage_maximum != 0) {
309: lo = h.usage_minimum;
310: hi = h.usage_maximum;
311: range = 1;
312: } else {
313: lo = h.usage;
314: hi = h.usage;
315: range = 0;
316: }
317: for (u = lo; u <= hi; u++) {
318: snprintf(usage, sizeof usage, "%s:%s",
1.4 deraadt 319: hid_usage_page(HID_PAGE(u)),
1.1 nate 320: hid_usage_in_page(u));
321: if (verbose > 2)
322: printf("usage %s\n", usage);
323: if (!strcasecmp(usage, name))
324: goto foundhid;
325: if (coll[0]) {
326: snprintf(usage, sizeof usage,
327: "%s.%s:%s", coll+1,
1.4 deraadt 328: hid_usage_page(HID_PAGE(u)),
1.1 nate 329: hid_usage_in_page(u));
330: if (verbose > 2)
331: printf("usage %s\n",
1.4 deraadt 332: usage);
1.1 nate 333: if (!strcasecmp(usage, name))
334: goto foundhid;
335: }
336: }
337: break;
338: case hid_collection:
339: snprintf(coll + strlen(coll),
340: sizeof coll - strlen(coll), ".%s:%s",
1.4 deraadt 341: hid_usage_page(HID_PAGE(h.usage)),
1.1 nate 342: hid_usage_in_page(h.usage));
343: break;
344: case hid_endcollection:
345: if (coll[0])
346: *strrchr(coll, '.') = 0;
347: break;
348: default:
349: break;
350: }
351: }
1.11 guenther 352: hid_end_parse(d);
1.1 nate 353: if (ignore) {
354: if (verbose)
1.2 jsyn 355: warnx("ignore item '%s'", name);
1.11 guenther 356: /* pop and free this ignored item */
357: cmds = cmd->next;
358: free(cmd);
1.1 nate 359: continue;
360: }
361: if (isdemon) {
362: syslog(LOG_WARNING, "config file `%s', line %d, HID "
1.6 jaredy 363: "item not found: `%s'", conf, line, name);
1.1 nate 364: freecommands(cmds);
1.11 guenther 365: fclose(f);
1.1 nate 366: return (NULL);
367: } else {
368: errx(1, "config file `%s', line %d, HID item "
1.6 jaredy 369: "not found: `%s'", conf, line, name);
1.1 nate 370: }
371:
372: foundhid:
373: hid_end_parse(d);
374: cmd->item = h;
375: cmd->name = strdup(name);
376: cmd->action = strdup(action);
377: if (range) {
378: if (cmd->value == 1)
379: cmd->value = u - lo;
380: else
381: cmd->value = -1;
382: }
383:
384: if (verbose)
385: printf("PARSE:%d %s, %d, '%s'\n", cmd->line, name,
1.4 deraadt 386: cmd->value, cmd->action);
1.1 nate 387: }
388: fclose(f);
389: return (cmds);
390: }
391:
392: void
393: docmd(struct command *cmd, int value, const char *hid, int argc, char **argv)
394: {
395: char cmdbuf[SIZE], *p, *q;
396: size_t len;
397: int n, r;
1.15 jasper 398: pid_t pid;
1.1 nate 399:
1.14 deraadt 400: if (cmd->action == NULL) {
1.13 ckuethe 401: if (verbose)
402: printf("no action for device %s value %d\n",
1.14 deraadt 403: hid, value);
1.13 ckuethe 404: return;
405: }
1.1 nate 406: for (p = cmd->action, q = cmdbuf; *p && q < &cmdbuf[SIZE-1]; ) {
407: if (*p == '$') {
408: p++;
409: len = &cmdbuf[SIZE-1] - q;
1.17 deraadt 410: if (isdigit((unsigned char)*p)) {
1.1 nate 411: n = strtol(p, &p, 10) - 1;
412: if (n >= 0 && n < argc) {
413: strncpy(q, argv[n], len);
414: q += strlen(q);
415: }
416: } else if (*p == 'V') {
417: p++;
418: snprintf(q, len, "%d", value);
419: q += strlen(q);
420: } else if (*p == 'N') {
421: p++;
422: strncpy(q, cmd->name, len);
423: q += strlen(q);
424: } else if (*p == 'H') {
425: p++;
426: strncpy(q, hid, len);
427: q += strlen(q);
428: } else if (*p) {
429: *q++ = *p++;
430: }
431: } else {
432: *q++ = *p++;
433: }
434: }
435: *q = 0;
436:
1.15 jasper 437: pid = fork();
438: if (pid == -1)
439: warn("fork failed");
440: else if (pid == 0) {
441: setpgid(0, 0);
442: if (verbose)
443: printf("executing '%s'\n", cmdbuf);
1.22 ! krw 444: r = execl(_PATH_BSHELL, "sh", "-c", cmdbuf, (char *)NULL);
1.15 jasper 445: err(1, "execl");
446: }
1.1 nate 447: }
448:
449: void
450: freecommands(struct command *cmd)
451: {
452: struct command *next;
453:
454: while (cmd) {
455: next = cmd->next;
456: free(cmd);
457: cmd = next;
458: }
459: }