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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2012-11-17 21:19:01 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2012-11-17 21:19:01 -0600
commit20d9ede028418c747b8ebb57c3ac8e9963e79308 (patch)
tree99bb0f976d88457c652651090e529e4178cd95b9 /tsak/main.cpp
parenta7e210311d906d1dcb9ec0818d010dcc3c2f8a23 (diff)
downloadtdebase-20d9ede028418c747b8ebb57c3ac8e9963e79308.tar.gz
tdebase-20d9ede028418c747b8ebb57c3ac8e9963e79308.zip
Fix tsak crash or hang on certain hardware
Fix numlock/capslock failures on certain hardware
Diffstat (limited to 'tsak/main.cpp')
-rw-r--r--tsak/main.cpp112
1 files changed, 80 insertions, 32 deletions
diff --git a/tsak/main.cpp b/tsak/main.cpp
index 88cf11ec6..cf75f957f 100644
--- a/tsak/main.cpp
+++ b/tsak/main.cpp
@@ -47,7 +47,9 @@ using namespace std;
#define FIFO_FILE_OUT "/tmp/tdesocket-global/tsak"
#define FIFO_LOCKFILE_OUT "/tmp/tdesocket-global/tsak.lock"
-#define MAX_KEYBOARDS 64
+// WARNING
+// MAX_KEYBOARDS must be greater than or equal to MAX_INPUT_NODE
+#define MAX_KEYBOARDS 128
#define MAX_INPUT_NODE 128
#define TestBit(bit, array) (array[(bit) / 8] & (1 << ((bit) % 8)))
@@ -68,6 +70,7 @@ sigset_t block_mask;
int keyboard_fd_num;
int keyboard_fds[MAX_KEYBOARDS];
int child_pids[MAX_KEYBOARDS];
+int child_led_pids[MAX_KEYBOARDS];
const char *keycode[256] =
{
@@ -121,6 +124,9 @@ void tsak_friendly_termination() {
if (child_pids[i] != 0) {
kill(child_pids[i], SIGTERM);
}
+ if (child_led_pids[i] != 0) {
+ kill(child_led_pids[i], SIGTERM);
+ }
}
// Wait for process termination
@@ -150,6 +156,31 @@ int str_ends_with(const char * str, const char * suffix) {
}
// --------------------------------------------------------------------------------------
+/*
+ * Set a file descriptor to blocking or non-blocking mode.
+ *
+ * @param fd The file descriptor
+ * @param blocking 0:non-blocking mode, 1:blocking mode
+ *
+ * @return 1:success, 0:failure.
+ */
+int fd_set_blocking(int fd, int blocking)
+{
+ /* Save the current flags */
+ int flags = fcntl(fd, F_GETFL, 0);
+ if (flags == -1) {
+ return 0;
+ }
+
+ if (blocking) {
+ flags &= ~O_NONBLOCK;
+ }
+ else {
+ flags |= O_NONBLOCK;
+ }
+ return fcntl(fd, F_SETFL, flags) != -1;
+}
+
/* Assign features (supported axes and keys) of the physical input device (devin)
* to the virtual input device (devout) */
static void copy_features(int devin, int devout)
@@ -194,28 +225,30 @@ int find_keyboards() {
}
for (i=0; i<MAX_INPUT_NODE; i++) {
- snprintf(filename,sizeof(filename), "/dev/input/event%d", i);
+ snprintf(filename, sizeof(filename), "/dev/input/event%d", i);
fd = open(filename, O_RDWR|O_SYNC);
- ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask);
-
- // Ensure that we do not detect our own tsak faked keyboards
- ioctl (fd, EVIOCGNAME (sizeof (name)), name);
- if (str_ends_with(name, "+tsak") == 0) {
- /* We assume that anything that has an alphabetic key in the
- QWERTYUIOP range in it is the main keyboard. */
- for (j = KEY_Q; j <= KEY_P; j++) {
- if (TestBit(j, key_bitmask)) {
- keyboard_fds[keyboard_fd_num] = fd;
+ if (fd >= 0) {
+ ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask);
+
+ // Ensure that we do not detect our own tsak faked keyboards
+ ioctl (fd, EVIOCGNAME(sizeof(name)), name);
+ if (str_ends_with(name, "+tsak") == 0) {
+ /* We assume that anything that has an alphabetic key in the
+ QWERTYUIOP range in it is the main keyboard. */
+ for (j = KEY_Q; j <= KEY_P; j++) {
+ if (TestBit(j, key_bitmask)) {
+ keyboard_fds[keyboard_fd_num] = fd;
+ }
}
}
- }
-
- if (keyboard_fds[keyboard_fd_num] == 0) {
- close (fd);
- }
- else {
- keyboard_fd_num++;
+
+ if (keyboard_fds[keyboard_fd_num] == 0) {
+ close(fd);
+ }
+ else {
+ keyboard_fd_num++;
+ }
}
}
return 0;
@@ -342,6 +375,9 @@ void restart_tsak()
if (child_pids[i] != 0) {
kill(child_pids[i], SIGKILL);
}
+ if (child_pids[i] != 0) {
+ kill(child_led_pids[i], SIGKILL);
+ }
}
// Wait for process termination
@@ -420,6 +456,7 @@ int main (int argc, char *argv[])
try {
for (i=0; i<MAX_KEYBOARDS; i++) {
child_pids[i] = 0;
+ child_led_pids[i] = 0;
}
if (argc == 2) {
@@ -513,6 +550,7 @@ int main (int argc, char *argv[])
else
return 3;
}
+ fd_set_blocking(devout[current_keyboard], true);
}
if (depcheck == true) {
return 0;
@@ -523,10 +561,12 @@ int main (int argc, char *argv[])
if(ioctl(keyboard_fds[current_keyboard], EVIOCGRAB, 2) < 0) {
close(keyboard_fds[current_keyboard]);
fprintf(stderr, "Failed to grab exclusive input device lock");
- if (established)
+ if (established) {
sleep(1);
- else
+ }
+ else {
return 1;
+ }
}
else {
ioctl(keyboard_fds[current_keyboard], EVIOCGNAME(UINPUT_MAX_NAME_SIZE), devinfo.name);
@@ -564,22 +604,30 @@ int main (int argc, char *argv[])
return 0;
}
+ int i=fork();
+ if (i<0) return 9; // fork failed
+ if (i>0) {
+ child_led_pids[current_keyboard] = i;
+ while (1) {
+ // Replicate LED events from the virtual keyboard to the physical keyboard
+ int rrd = read(devout[current_keyboard], &revev, size);
+ if (rrd >= size) {
+ if (revev.type == EV_LED) {
+ if (write(keyboard_fds[current_keyboard], &revev, sizeof(revev)) < 0) {
+ fprintf(stderr, "Unable to replicate LED event\n");
+ }
+ }
+ }
+ }
+ return 0;
+ }
+
while (1) {
- if ((rd = read (keyboard_fds[current_keyboard], ev, size)) < size) {
+ if ((rd = read(keyboard_fds[current_keyboard], ev, size)) < size) {
fprintf(stderr, "Read failed.\n");
break;
}
- // Replicate LED events from the virtual keyboard to the physical keyboard
- int rrd = read(devout[current_keyboard], &revev, size);
- if (rrd >= size) {
- if (revev.type == EV_LED) {
- if (write(keyboard_fds[current_keyboard], &revev, sizeof(revev)) < 0) {
- fprintf(stderr, "Unable to replicate LED event\n");
- }
- }
- }
-
if (ev[0].value == 0 && ev[0].type == 1) { // Read the key release event
if (keycode[(ev[0].code)]) {
if (strcmp(keycode[(ev[0].code)], "<control>") == 0) ctrl_down = false;