libptytty/eg/c-sample.c

// on my system, this program outputs:
//
// who; echo 'Hello, World!'; exit
// # root     pts/9        Jan 25 12:12 (libptytty.example.net)
// Hello, World!
//

#include <stdio.h>
#include <stdlib.h>

#include <sys/types.h>
#include <unistd.h>

#include <libptytty.h>

int main (void)
{
  ptytty_init ();

  PTYTTY pty = ptytty_create ();

  if (!ptytty_get (pty))
    printf ("unable to open pty\n"), exit (EXIT_FAILURE);

  pid_t pid = fork ();

  if (pid < 0)
    printf ("fork error\n"), exit (EXIT_FAILURE);

  int pty_fd = ptytty_pty (pty);
  int tty_fd = ptytty_tty (pty);

  if (pid)
    {
      ptytty_close_tty (pty);
      ptytty_login (pty, pid, 1, "libptytty.example.net");

      char s[] = "who; echo 'Hello, World!'; exit\015";

      write (pty_fd, s, sizeof (s) - 1);

      char buf[1024];

      for (;;)
        {
          int len = read (pty_fd, buf, 1024);

          if (len <= 0)
            break;

          write (STDOUT_FILENO, buf, len);
        }

      ptytty_delete (pty);
    }
  else
    {
      ptytty_make_controlling_tty (pty);

      close (pty_fd);
      dup2 (tty_fd, STDIN_FILENO );
      dup2 (tty_fd, STDOUT_FILENO);
      dup2 (tty_fd, STDERR_FILENO);
      close (tty_fd);

      execl ("/bin/sh", "-sh", (char *)0);
      _exit (EXIT_FAILURE);
    }

  return EXIT_SUCCESS;
}


Revision:	1.6
Committed:	Fri Jan 20 13:52:31 2012 UTC (12 years, 4 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rxvt-unicode-rel-9_26, rxvt-unicode-rel-9_25, rxvt-unicode-rel-9_22, rxvt-unicode-rel-9_20, rxvt-unicode-rel-9_21, rel-1_8, rxvt-unicode-rel-9_19, rxvt-unicode-rel-9_18, rxvt-unicode-rel-9_17, rxvt-unicode-rel-9_16, rel-1_7, rxvt-unicode-rel-9_15, rel-1_6, HEAD
Changes since 1.5:	+0 -4 lines
Log Message:	Build (but not install) the sample C program.
#	User	Rev	Content
1	root	1.2	// on my system, this program outputs:
2			//
3			// who; echo 'Hello, World!'; exit
4			// # root pts/9 Jan 25 12:12 (libptytty.example.net)
5			// Hello, World!
6			//
7
8			#include <stdio.h>
9			#include <stdlib.h>
10
11			#include <sys/types.h>
12			#include <unistd.h>
13	root	1.1
14			#include <libptytty.h>
15
16	root	1.2	int main (void)
17			{
18			ptytty_init ();
19
20			PTYTTY pty = ptytty_create ();
21
22			if (!ptytty_get (pty))
23			printf ("unable to open pty\n"), exit (EXIT_FAILURE);
24
25			pid_t pid = fork ();
26
27			if (pid < 0)
28			printf ("fork error\n"), exit (EXIT_FAILURE);
29
30			int pty_fd = ptytty_pty (pty);
31			int tty_fd = ptytty_tty (pty);
32
33			if (pid)
34			{
35			ptytty_close_tty (pty);
36			ptytty_login (pty, pid, 1, "libptytty.example.net");
37
38			char s[] = "who; echo 'Hello, World!'; exit\015";
39
40			write (pty_fd, s, sizeof (s) - 1);
41
42			char buf[1024];
43
44			for (;;)
45			{
46			int len = read (pty_fd, buf, 1024);
47
48			if (len <= 0)
49			break;
50
51			write (STDOUT_FILENO, buf, len);
52			}
53
54			ptytty_delete (pty);
55			}
56			else
57			{
58			ptytty_make_controlling_tty (pty);
59
60			close (pty_fd);
61			dup2 (tty_fd, STDIN_FILENO );
62			dup2 (tty_fd, STDOUT_FILENO);
63			dup2 (tty_fd, STDERR_FILENO);
64			close (tty_fd);
65
66	sf-exg	1.4	execl ("/bin/sh", "-sh", (char *)0);
67	root	1.2	_exit (EXIT_FAILURE);
68			}
69	ayin	1.3
70	root	1.2	return EXIT_SUCCESS;
71			}
72	root	1.1
73