1#include <stdlib.h> 2#include <fcntl.h> 3#include <unistd.h> 4#include <pty.h> 5#include <stdio.h> 6#include <pthread.h> 7 8/* Nonstandard, but vastly superior to the standard functions */ 9 10int openpty(int *pm, int *ps, char *name, const struct termios *tio, const struct winsize *ws) 11{ 12 int m, s, n=0, cs; 13 char buf[20]; 14 15 m = open("/dev/ptmx", O_RDWR|O_NOCTTY); 16 if (m < 0) return -1; 17 18 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); 19 20 if (ioctl(m, TIOCSPTLCK, &n) || ioctl (m, TIOCGPTN, &n)) 21 goto fail; 22 23 if (!name) name = buf; 24 snprintf(name, sizeof buf, "/dev/pts/%d", n); 25 if ((s = open(name, O_RDWR|O_NOCTTY)) < 0) 26 goto fail; 27 28 if (tio) tcsetattr(s, TCSANOW, tio); 29 if (ws) ioctl(s, TIOCSWINSZ, ws); 30 31 *pm = m; 32 *ps = s; 33 34 pthread_setcancelstate(cs, 0); 35 return 0; 36fail: 37 close(m); 38 pthread_setcancelstate(cs, 0); 39 return -1; 40} 41