forkpty.c 1.4 KB

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  1. /* Copyright (C) 1998 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <sys/types.h>
  16. #include <termios.h>
  17. #include <unistd.h>
  18. #include <utmp.h>
  19. #include <pty.h>
  20. int
  21. forkpty (int *amaster, char *name, struct termios *termp, struct winsize *winp)
  22. {
  23. int master, slave, pid;
  24. if (openpty (&master, &slave, name, termp, winp) == -1)
  25. return -1;
  26. switch (pid = fork ())
  27. {
  28. case -1:
  29. return -1;
  30. case 0:
  31. /* Child. */
  32. close (master);
  33. if (login_tty (slave))
  34. _exit (1);
  35. return 0;
  36. default:
  37. /* Parent. */
  38. *amaster = master;
  39. close (slave);
  40. return pid;
  41. }
  42. }