On Wed, Apr 13, 2011 at 12:06 AM, Vijay Ram Chitrapu <chitrapu.vijayram@xxxxxxxxx> wrote: > Hi experts, > > I am using MVL6.0 in my project and have customized the kernel as per > the requirement. However, i am facing a problem where the Ctrl+C > signal doesn't get caught (or not sure if it is even generated) on the > target platform. I have tried using the "trap" at the shell to capture > the signal but the signal just doesn't get caught. Below is what i > have done to try the trap way > > trap " " INT It means that ignore INT signal. > echo "Catching Ctrl+C signal" > trap INT > sleep 5 > You can try this to capture "Ctrl+C" signal. trap 'echo "Catching Ctrl+C signal"' 2 > Putting this piece of code into a script doesn't catch the signal > SIGINT (ctrl+c). To understand if it was a problem with the shell, i > wrote a C code to register my own signal handler for SIGINT signal. To > verify the correctness of the code, i executed the C code on the HOST > server and it works well there (signal handler gets invoked when > ctrl+c is pressed). Whereas, the same C code doesn't catch the Ctr+C > signal in the target platform. > > Can someone tell me if there is any specific way to identify is there > a way or rather is there a need to enable the signals explicitly while > creating the config file for the kernel? Below is the output of "stty > -a" command at the shell where i need to catch the Ctrl+C signal. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > / # stty -a > speed 115200 baud; rows 24; columns 80; > intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; > eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; > werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0; > -parenb -parodd cs8 hupcl -cstopb cread clocal crtscts > -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff > -iuclc -ixany -imaxbel > opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0 > isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt > echoctl echoke > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Regards, > Vijay > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
