diff options
Diffstat (limited to 'tsak')
| -rw-r--r-- | tsak/main.cpp | 77 |
1 files changed, 53 insertions, 24 deletions
diff --git a/tsak/main.cpp b/tsak/main.cpp index 8762bd8c6..087147935 100644 --- a/tsak/main.cpp +++ b/tsak/main.cpp @@ -43,8 +43,8 @@ License along with tsak. If not, see http://www.gnu.org/licenses/. typedef unsigned char byte; -bool mPipeOpen_out; -int mPipe_fd_out; +bool mPipeOpen_out = false; +int mPipe_fd_out = -1; struct sigaction usr_action; sigset_t block_mask; @@ -137,9 +137,11 @@ int find_keyboard() { void tearDownPipe() { - mPipeOpen_out = false; - close(mPipe_fd_out); - unlink(FIFO_FILE_OUT); + if (mPipeOpen_out == true) { + mPipeOpen_out = false; + close(mPipe_fd_out); + unlink(FIFO_FILE_OUT); + } } void setupPipe() @@ -151,12 +153,32 @@ void setupPipe() mknod(FIFO_FILE_OUT, S_IFIFO|0600, 0); chmod(FIFO_FILE_OUT, 0600); - mPipe_fd_out = open(FIFO_FILE_OUT, O_RDWR | O_NONBLOCK); + mPipe_fd_out = open(FIFO_FILE_OUT, O_WRONLY | O_NONBLOCK); if (mPipe_fd_out > -1) { mPipeOpen_out = true; } } +bool checkLocks() +{ + int fdlock; + struct flock fl; + + fl.l_type = F_WRLCK; + fl.l_whence = SEEK_SET; + fl.l_start = 0; + fl.l_len = 1; + + fdlock = open(FIFO_FILE_OUT, O_RDWR | O_NONBLOCK); + if (fdlock != -1) { + if(fcntl(fdlock, F_SETLK, &fl) == -1) { + return 0; + } + } + + return 1; +} + class PipeHandler { public: @@ -166,7 +188,6 @@ public: PipeHandler::PipeHandler() { - setupPipe(); } PipeHandler::~PipeHandler() @@ -193,6 +214,11 @@ int main (int argc, char *argv[]) } } + if (!checkLocks()) { + fprintf(stderr, "Another instance of this program is already running\n"); + return 8; + } + // Create the output pipe PipeHandler controlpipe; @@ -214,7 +240,7 @@ int main (int argc, char *argv[]) else { // Print Device Name ioctl (fd, EVIOCGNAME (sizeof (name)), name); - printf ("Reading From : (%s)\n", name); + fprintf(stderr, "Reading From : (%s)\n", name); // Create filtered virtual output device devout=open("/dev/misc/uinput",O_WRONLY|O_NONBLOCK); @@ -230,32 +256,35 @@ int main (int argc, char *argv[]) return 3; } else { - ioctl(fd, EVIOCGNAME(UINPUT_MAX_NAME_SIZE), devinfo.name); - strncat(devinfo.name, "+tsak", UINPUT_MAX_NAME_SIZE-1); - fprintf(stderr, "%s\n", devinfo.name); - ioctl(fd, EVIOCGID, &devinfo.id); - - copy_features(fd, devout); - write(devout,&devinfo,sizeof(devinfo)); - if (ioctl(devout,UI_DEV_CREATE)<0) { - fprintf(stderr,"Unable to create input device with UI_DEV_CREATE\n"); + if(ioctl(fd, EVIOCGRAB, 2) < 0) { + close(fd); + fprintf(stderr, "Failed to grab exclusive input device lock"); if (established) sleep(1); else - return 2; + return 1; } else { - fprintf(stderr,"Device created.\n"); - - if(ioctl(fd, EVIOCGRAB, 2) < 0) { - close(fd); - fprintf(stderr, "Failed to grab exclusive input device lock"); + ioctl(fd, EVIOCGNAME(UINPUT_MAX_NAME_SIZE), devinfo.name); + strncat(devinfo.name, "+tsak", UINPUT_MAX_NAME_SIZE-1); + fprintf(stderr, "%s\n", devinfo.name); + ioctl(fd, EVIOCGID, &devinfo.id); + + copy_features(fd, devout); + write(devout,&devinfo,sizeof(devinfo)); + if (ioctl(devout,UI_DEV_CREATE)<0) { + fprintf(stderr,"Unable to create input device with UI_DEV_CREATE\n"); if (established) sleep(1); else - return 1; + return 2; } else { + fprintf(stderr,"Device created.\n"); + + if (established == false) { + setupPipe(); + } established = true; |