libptytty/eg/c-sample.c

// gcc -I../src -L../src/.libs c-sample.c -lptytty
//
// if your C compiler can't grok this, it isn't a C compiler
//
// 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:	1.5
Committed:	Tue Dec 20 16:09:32 2011 UTC (14 years, 9 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-9_14, rel-1_5
Changes since 1.4:	+0 -2 lines
Log Message:	Do not set the pty fd non-blocking in ptytty::get.
#	User	Rev	Content
1	root	1.1	// gcc -I../src -L../src/.libs c-sample.c -lptytty
2	root	1.2	//
3			// if your C compiler can't grok this, it isn't a C compiler
4			//
5			// on my system, this program outputs:
6			//
7			// who; echo 'Hello, World!'; exit
8			// # root pts/9 Jan 25 12:12 (libptytty.example.net)
9			// Hello, World!
10			//
11
12			#include <stdio.h>
13			#include <stdlib.h>
14
15			#include <sys/types.h>
16			#include <unistd.h>
17	root	1.1
18			#include <libptytty.h>
19
20	root	1.2	int main (void)
21			{
22			ptytty_init ();
23
24			PTYTTY pty = ptytty_create ();
25
26			if (!ptytty_get (pty))
27			printf ("unable to open pty\n"), exit (EXIT_FAILURE);
28
29			pid_t pid = fork ();
30
31			if (pid < 0)
32			printf ("fork error\n"), exit (EXIT_FAILURE);
33
34			int pty_fd = ptytty_pty (pty);
35			int tty_fd = ptytty_tty (pty);
36
37			if (pid)
38			{
39			ptytty_close_tty (pty);
40			ptytty_login (pty, pid, 1, "libptytty.example.net");
41
42			char s[] = "who; echo 'Hello, World!'; exit\015";
43
44			write (pty_fd, s, sizeof (s) - 1);
45
46			char buf[1024];
47
48			for (;;)
49			{
50			int len = read (pty_fd, buf, 1024);
51
52			if (len <= 0)
53			break;
54
55			write (STDOUT_FILENO, buf, len);
56			}
57
58			ptytty_delete (pty);
59			}
60			else
61			{
62			ptytty_make_controlling_tty (pty);
63
64			close (pty_fd);
65			dup2 (tty_fd, STDIN_FILENO );
66			dup2 (tty_fd, STDOUT_FILENO);
67			dup2 (tty_fd, STDERR_FILENO);
68			close (tty_fd);
69
70	sf-exg	1.4	execl ("/bin/sh", "-sh", (char *)0);
71	root	1.2	_exit (EXIT_FAILURE);
72			}
73	ayin	1.3
74	root	1.2	return EXIT_SUCCESS;
75			}
76	root	1.1
77