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- /*
- * Libraries and headers for PDC release 3.3 (C) 1989 Lionel Hummel.
- * PDC Software Distribution (C) 1989 Lionel Hummel and Paul Petersen.
- * PDC I/O Library (C) 1987 by J.A. Lydiatt.
- *
- * This code is freely redistributable upon the conditions that this
- * notice remains intact and that modified versions of this file not
- * be included as part of the PDC Software Distribution without the
- * express consent of the copyright holders. No warrantee of any
- * kind is provided with this code. For further information, contact:
- *
- * PDC Software Distribution Internet: BIX:
- * P.O. Box 4006 or hummel@cs.uiuc.edu lhummel
- * Urbana, IL 61801-8801 petersen@uicsrd.csrd.uiuc.edu
- */
-
- /* close - closes an open file and free's its fd */
-
- #include <errno.h>
- #include <fcntl.h>
-
- extern void Close();
-
- close(fd)
- int fd; /* The file descriptor. */
- {
- struct _device *p;
- extern struct _device *_devtab;
-
- p = &_devtab[fd];
- if ( !(0 <= fd && fd < _numdev) || p->_fileHandle == 0) {
- errno = EBADF;
- return(-1);
- }
-
- if ( !(p->_mode & O_STDIO) ) {
- Close( p->_fileHandle );
- }
-
- p->_mode = 0;
- p->_fileHandle = 0;
- return 0;
- }
-