1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <unistd.h>
4 #include <fcntl.h>
5 #include <termios.h>
6 #include <pty.h>
7
main()8 int main()
9 {
10 int ptm, pts;
11 char name[256];
12 struct termios term;
13
14 if (openpty(&ptm, &pts, name, NULL, NULL) == -1) {
15 perror("openpty");
16 exit(EXIT_FAILURE);
17 }
18
19 printf("slave name: %s fd: %d\n", name,pts);
20
21 tcgetattr(pts, &term);
22 term.c_lflag &= ~(ICANON | ECHO);
23 term.c_cc[VMIN] = 1;
24 term.c_cc[VTIME] = 0;
25 tcsetattr(pts, TCSANOW, &term);
26
27 printf("before print to pty slave\n");
28
29 dprintf(pts, "Hello world!\n");
30
31 char buf[256];
32 ssize_t n = read(ptm, buf, sizeof(buf));
33 if (n > 0) {
34 printf("read %ld bytes from slave: %.*s", n, (int)n, buf);
35 }
36
37 dprintf(ptm, "hello world from master\n");
38
39 char nbuf[256];
40 ssize_t nn = read(pts, nbuf, sizeof(nbuf));
41 if (nn > 0) {
42 printf("read %ld bytes from master: %.*s", nn, (int)nn, nbuf);
43 }
44
45 close(ptm);
46 close(pts);
47
48 return 0;
49 }