forkpty.c 1.6 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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #include <sys/types.h>
  17. #include <termios.h>
  18. #include <unistd.h>
  19. #include <utmp.h>
  20. #include <pty.h>
  21. libutil_hidden_proto(openpty)
  22. libutil_hidden_proto(login_tty)
  23. int
  24. forkpty (amaster, name, termp, winp)
  25. int *amaster;
  26. char *name;
  27. struct termios *termp;
  28. struct winsize *winp;
  29. {
  30. int master, slave, pid;
  31. if (openpty (&master, &slave, name, termp, winp) == -1)
  32. return -1;
  33. switch (pid = fork ())
  34. {
  35. case -1:
  36. return -1;
  37. case 0:
  38. /* Child. */
  39. close (master);
  40. if (login_tty (slave))
  41. _exit (1);
  42. return 0;
  43. default:
  44. /* Parent. */
  45. *amaster = master;
  46. close (slave);
  47. return pid;
  48. }
  49. }