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Code Issues Releases Wiki Activity

uinput driver: some status messages

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This commit is contained in:
Richard Hirner 2013-06-22 14:41:42 +02:00
parent edc3c99a95
commit 7f9be5ecf0
2 changed files with 25 additions and 8 deletions
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7
README.md
View file

@ -75,7 +75,7 @@ Part 1: uinput driver
On your PC, either download one of these binaries (don't forget to `chmod a+x` it): On your PC, either download one of these binaries (don't forget to `chmod a+x` it):
* [uinput-networktablet 64-bit, dynamically linked, tested with Fedora 18 and Ubuntu 12.10](https://github.com/rfc2822/GfxTablet/blob/binaries/uinput-networktablet-x86_64?raw=true) * [networktablet 64-bit, dynamically linked, tested with Fedora 18 and Ubuntu 12.10](https://github.com/rfc2822/GfxTablet/blob/binaries/networktablet-x86_64?raw=true)
or compile it yourself (don't be afraid, it's only one file) or compile it yourself (don't be afraid, it's only one file)
@ -90,12 +90,13 @@ uinput access, you'll need to do it yourself or just run the driver as root:
`sudo ./networktablet` `sudo ./networktablet`
Then, `xinput list` should show a "Network Tablet" device. Then you should see a status message saying the driver is ready. If you do `xinput list` in a separate
terminal, should show a "Network Tablet" device.
You can start and stop (Ctrl+C) the Network Tablet at any time, but please be aware that applications You can start and stop (Ctrl+C) the Network Tablet at any time, but please be aware that applications
which use the device may be confused by that and could crash. which use the device may be confused by that and could crash.
`networktablet` will display a dot for every touch/motion event it receives. `networktablet` will display a status line for every touch/motion event it receives.
Part 2: App Part 2: App

26
driver-uinput/networktablet.c
View file

@ -2,6 +2,7 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <signal.h>
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <errno.h> #include <errno.h>
@ -17,6 +18,9 @@
} }
int udp_socket;
void init_device(int fd) void init_device(int fd)
{ {
struct uinput_user_dev uidev; struct uinput_user_dev uidev;
@ -85,19 +89,29 @@ void send_event(int device, int type, int code, int value)
error("error: write()"); error("error: write()");
} }
void quit(int signal) {
close(udp_socket);
}
int main(void) int main(void)
{ {
int device, socket; int device;
struct event_packet ev_pkt; struct event_packet ev_pkt;
if ((device = open("/dev/uinput", O_WRONLY | O_NONBLOCK)) < 0) if ((device = open("/dev/uinput", O_WRONLY | O_NONBLOCK)) < 0)
die("error: open"); die("error: open");
init_device(device); init_device(device);
socket = prepare_socket(); udp_socket = prepare_socket();
while (recv(socket, &ev_pkt, sizeof(ev_pkt), 0) >= 9) { // every packet has at least 9 bytes printf("GfxTablet driver (protocol version %u) is ready and listening on 0.0.0.0:%u (UDP)\n"
"Hint: Make sure that this port is not blocked by your firewall.\n", PROTOCOL_VERSION, GFXTABLET_PORT);
signal(SIGINT, quit);
signal(SIGTERM, quit);
while (recv(udp_socket, &ev_pkt, sizeof(ev_pkt), 0) >= 9) { // every packet has at least 9 bytes
printf("."); fflush(0); printf("."); fflush(0);
if (memcmp(ev_pkt.signature, "GfxTablet", 9) != 0) { if (memcmp(ev_pkt.signature, "GfxTablet", 9) != 0) {
@ -132,10 +146,12 @@ int main(void)
} }
} }
close(udp_socket);
close(socket); printf("Removing network tablet from device list\n");
ioctl(device, UI_DEV_DESTROY); ioctl(device, UI_DEV_DESTROY);
close(device); close(device);
printf("GfxTablet driver shut down gracefully\n");
return 0; return 0;
} }