diff options
Diffstat (limited to 'sysdeps/unix/telldir.c')
-rw-r--r-- | sysdeps/unix/telldir.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/unix/telldir.c b/sysdeps/unix/telldir.c new file mode 100644 index 0000000000..c473bbc29d --- /dev/null +++ b/sysdeps/unix/telldir.c @@ -0,0 +1,42 @@ +/* Copyright (C) 1991 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <errno.h> +#include <stddef.h> +#include <dirent.h> +#include <unistd.h> +#include <sys/types.h> + +/* Return the current position of DIRP. */ +off_t +DEFUN(telldir, (dirp), DIR *dirp) +{ + register off_t pos; + + if (dirp == NULL) + { + errno = EINVAL; + return (off_t) -1; + } + + pos = __lseek(dirp->__fd, (off_t) 0, SEEK_CUR); + if (pos == (off_t) -1) + return (off_t) -1; + return pos + (dirp->__size - dirp->__offset); +} |