static void
defttymode(void)
{
struct termios def;
/* Start with default tty settings. */
if (tcgetattr(STDIN_FILENO, &tmode) < 0) {
syslog(LOG_ERR, "tcgetattr %s: %m", ttyn);
exit(1);
}
omode = tmode; /* fill c_cc for dogettytab() */
dogettytab();
/*
* Don't rely on the driver too much, and initialize crucial
* things according to <sys/ttydefaults.h>. Avoid clobbering
* the c_cc[] settings however, the console drivers might wish
* to leave their idea of the preferred VERASE key value
* there.
*/
cfmakesane(&def);
tmode.c_iflag = def.c_iflag;
tmode.c_oflag = def.c_oflag;
tmode.c_lflag = def.c_lflag;
tmode.c_cflag = def.c_cflag;
if (NC)
tmode.c_cflag |= CLOCAL;
omode = tmode;
}
// === PRIVATE ===
pid_t TTYProcess::LaunchProcess(int& fd, char *prog, char **child_args){
//Returns: -1 for errors, positive value (file descriptor) for the master side of the TTY to watch
//First open/setup a new pseudo-terminal file/device on the system (master side)
fd = posix_openpt(O_RDWR | O_NOCTTY); //open read/write
if(fd<0){ return -1; } //could not create pseudo-terminal
int rc = grantpt(fd); //set permissions
if(rc!=0){ return -1; }
rc = unlockpt(fd); //unlock file (ready for use)
if(rc!=0){ return -1; }
//Now fork, return the Master device and setup the child
pid_t PID = fork();
if(PID==0){
//SLAVE/child
int fds = ::open(ptsname(fd), O_RDWR | O_NOCTTY); //open slave side read/write
::close(fd); //close the master side from the slave thread
//Adjust the slave side mode to RAW
struct termios TSET;
rc = tcgetattr(fds, &TSET); //read the current settings
cfmakesane(&TSET); //set the RAW mode on the settings ( cfmakeraw(&TSET); )
tcsetattr(fds, TCSANOW, &TSET); //apply the changed settings
//Change the controlling terminal in child thread to the slave PTY
::close(0); //close current terminal standard input
::close(1); //close current terminal standard output
::close(2); //close current terminal standard error
dup(fds); // Set slave PTY as standard input (0);
dup(fds); // Set slave PTY as standard output (1);
dup(fds); // Set slave PTY as standard error (2);
setsid(); //Make current process new session leader (so we can set controlling terminal)
ioctl(0,TIOCSCTTY, 1); //Set the controlling terminal to the slave PTY
//Execute the designated program
rc = execvp(prog, child_args);
::close(fds); //no need to keep original file descriptor open any more
exit(rc);
}
//MASTER thread (or error)
return PID;
}
static void test_termios_cfmakesane(void)
{
struct termios term;
memset( &term, '\0', sizeof(term) );
cfmakesane( &term );
puts( "cfmakesane - OK" );
/* Check that all of the flags were set correctly */
rtems_test_assert( term.c_iflag == TTYDEF_IFLAG );
rtems_test_assert( term.c_oflag == TTYDEF_OFLAG );
rtems_test_assert( term.c_lflag == TTYDEF_LFLAG );
rtems_test_assert( term.c_cflag == TTYDEF_CFLAG );
rtems_test_assert( term.c_ispeed == TTYDEF_SPEED );
rtems_test_assert( term.c_ospeed == TTYDEF_SPEED );
rtems_test_assert( memcmp(&term.c_cc, ttydefchars, sizeof(term.c_cc)) == 0 );
}
