openpty.c

#include "includes.h"

int
openpty (int *amaster, int *aslave, char *name, struct termios *termp,
         struct winsize *winp)
{
  int master, slave;
  char *name_slave;

  master = open("/dev/ptmx", O_RDWR | O_NONBLOCK);
  if (master == -1) {
    TRACE(("Fail to open master"))
    return -1;
  }

  if (grantpt(master))
    goto fail;

  if (unlockpt(master))
    goto fail;

  name_slave = ptsname(master);
  TRACE(("openpty: slave name %s", name_slave))
  slave = open(name_slave, O_RDWR | O_NOCTTY);
  if (slave == -1)
    {
      goto fail;
    }

  if(termp)
    tcsetattr(slave, TCSAFLUSH, termp);
  if (winp)
    ioctl (slave, TIOCSWINSZ, winp);

  *amaster = master;
  *aslave = slave;
  if (name != NULL)
    strcpy(name, name_slave);

  return 0;

 fail:
  close (master);
  return -1;
}