getlogin.c 1.5 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /* getlogin for uClibc
  3. *
  4. * Copyright (C) 2000 by Lineo, inc. and Erik Andersen
  5. * Copyright (C) 2000-2002 by Erik Andersen <andersen@uclibc.org>
  6. * Written by Erik Andersen <andersen@uclibc.org>
  7. *
  8. * This program is free software; you can redistribute it and/or modify it
  9. * under the terms of the GNU Library General Public License as published by
  10. * the Free Software Foundation; either version 2 of the License, or (at your
  11. * option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful, but WITHOUT
  14. * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15. * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
  16. * for more details.
  17. *
  18. * You should have received a copy of the GNU Library General Public License
  19. * along with this program; if not, write to the Free Software Foundation,
  20. * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21. */
  22. #include <stdlib.h>
  23. #include <string.h>
  24. /* uClibc makes it policy to not mess with the utmp file whenever
  25. * possible, since I consider utmp a complete waste of time. Since
  26. * getlogin() should never be used for security purposes, we kindly let
  27. * the user specify whatever they want via the LOGNAME environment
  28. * variable, or we return NULL if getenv() fails to find anything */
  29. char * getlogin(void)
  30. {
  31. return (getenv("LOGNAME"));
  32. }
  33. int getlogin_r(char *name, size_t len)
  34. {
  35. char * foo = getenv("LOGNAME");
  36. if (! foo)
  37. return -1;
  38. strncpy(name, foo, len);
  39. name[len-1] = '\0';
  40. return 0;
  41. }