/* * usbmouse - listen for usb mouse events and turn them into * writes on /dev/mousein. */ #include #include #include #include int mousefd, ctlfd, mousein; char hbm[] = "0x020103"; char *mouseinfile = "/dev/mousein"; char *statfmt = "/dev/usb%d/%d/status"; char *ctlfmt = "/dev/usb%d/%d/ctl"; char *msefmt = "/dev/usb%d/%d/ep%ddata"; char *ctlmsgfmt = "ep %d bulk r %d 32"; char ctlfile[32]; char msefile[32]; int verbose; int nofork; int accel; int scroll; int maxacc = 3; int debug; int nbuts; void work(void *); int robusthandler(void*, char *s) { if (debug) fprint(2, "inthandler: %s\n", s); return s && (strstr(s, "interrupted") || strstr(s, "hangup")); } long robustread(int fd, void *buf, long sz) { long r; char err[ERRMAX]; do { r = read(fd , buf, sz); if (r < 0) rerrstr(err, sizeof(err)); } while (r < 0 && robusthandler(nil, err)); return r; } static int scale(int x) { int sign = 1; if(x < 0){ sign = -1; x = -x; } switch(x){ case 0: case 1: case 2: case 3: break; case 4: x = 6 + (accel>>2); break; case 5: x = 9 + (accel>>1); break; default: x *= maxacc; break; } return sign*x; } char maptab[] = { 0x0, 0x1, 0x4, 0x5, 0x2, 0x3, 0x6, 0x7 }; void usage(void) { fprint(2, "usage: %s [-fsv] [-a accel] [m n]\n", argv0); threadexitsall("usage"); } void threadmain(int argc, char *argv[]) { int ctlrno, i, ep = 0; char *p, *ctlstr; char buf[256]; Biobuf *f; ARGBEGIN{ case 's': scroll=1; break; case 'v': verbose=1; break; case 'f': nofork=1; break; case 'a': accel=strtol(EARGF(usage()), nil, 0); break; default: usage(); }ARGEND switch (argc) { case 0: for (ctlrno = 0; ctlrno < 16; ctlrno++) { sprint(buf, "/dev/usb%d", ctlrno); if (access(buf, AEXIST) < 0) continue; for (i = 1; i < 128; i++) { snprint(buf, sizeof buf, statfmt, ctlrno, i); f = Bopen(buf, OREAD); if (f == nil) break; while ((p = Brdline(f, '\n')) != 0) { p[Blinelen(f)-1] = '\0'; if (strncmp(p, "Enabled ", 8) == 0) continue; if (strstr(p, hbm) != nil) { ep = atoi(p); goto found; } } Bterm(f); } } threadexitsall("no mouse"); case 2: ctlrno = atoi(argv[0]); i = atoi(argv[1]); ep = 1; /* a guess */ if (verbose) fprint(2, "assuming endpoint %d\n", ep); found: snprint(ctlfile, sizeof ctlfile, ctlfmt, ctlrno, i); snprint(msefile, sizeof msefile, msefmt, ctlrno, i, ep); break; default: usage(); } nbuts = (scroll? 5: 3); ctlstr = smprint(ctlmsgfmt, ep, nbuts); if ((ctlfd = open(ctlfile, OWRITE)) < 0) sysfatal("%s: %r", ctlfile); if (verbose) fprint(2, "Send %s to %s\n", ctlstr, ctlfile); write(ctlfd, ctlstr, strlen(ctlstr)); close(ctlfd); free(ctlstr); if ((mousefd = open(msefile, OREAD)) < 0) sysfatal("%s: %r", msefile); if (verbose) fprint(2, "Start reading from %s\n", msefile); if ((mousein = open(mouseinfile, OWRITE)) < 0) sysfatal("%s: %r", mouseinfile); atnotify(robusthandler, 1); if (nofork) work(nil); else proccreate(work, nil, 4*1024); threadexits(nil); } void work(void *) { char buf[6]; int x, y, buts; for (;;) { buts = 0; switch (robustread(mousefd, buf, nbuts)) { case 4: if(buf[3] == 1) buts |= 0x08; else if(buf[3] == -1) buts |= 0x10; /* Fall through */ case 5: if(buf[3] > 10) buts |= 0x08; else if(buf[3] < -10) buts |= 0x10; /* Fall through */ case 3: if (accel) { x = scale(buf[1]); y = scale(buf[2]); } else { x = buf[1]; y = buf[2]; } fprint(mousein, "m%11d %11d %11d", x, y, buts | maptab[buf[0]&0x7]); break; case -1: sysfatal("read error: %r"); } } }