* terms of the GNU Lesser General Public License
* (see cit/LGPL or http://www.gnu.org/licenses/lgpl.html)
*
- * Cplant(TM) Copyright 1998-2003 Sandia Corporation.
+ * Cplant(TM) Copyright 1998-2006 Sandia Corporation.
* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
* license for use of this work by or on behalf of the US Government.
* Export of this program may require a license from the United States
*/
/*
+ * Test whether large file support on this file.
+ */
+#ifdef O_LARGEFILE
+#define _F_LARGEFILE(fil) \
+ ((fil)->f_flags & O_LARGEFILE)
+#else
+#define _F_LARGEFILE(fil) \
+ (1)
+#endif
+/*
+ * Return max seek value for this file.
+ */
+#define _SEEK_MAX(fil) \
+ (_F_LARGEFILE(fil) ? _SYSIO_OFF_T_MAX : LONG_MAX)
+
+#ifdef _LARGEFILE64_SOURCE
+#define _SYSIO_FLOCK flock64
+#else
+#define _SYSIO_FLOCK flock
+#endif
+
+/*
* A file record is maintained for each open file in the system. It holds
* all the info necessary to track the context and parameters for the
* operations that may be performed.
do { \
(fil)->f_ref++; \
assert((fil)->f_ref); \
- I_REF((fil)->f_ino); \
} while (0)
/*
*/
#define F_RELE(fil) \
do { \
- struct inode *ino; \
- \
assert((fil)->f_ref); \
(fil)->f_ref--; \
- ino = (fil)->f_ino; \
if (!(fil)->f_ref) \
_sysio_fgone(fil); \
- I_RELE(ino); \
} while (0)
/*
do { \
(fil)->f_ino = (ino); \
(fil)->f_pos = 0; \
- (fil)->f_ref = 1; \
+ (fil)->f_ref = 0; \
(fil)->f_flags = (flags); \
} while (0)
+/*
+ * Determine if a file may be read/written.
+ *
+ * Given a ptr to an open file table entry and a flag indicating desired
+ * access return non-zero if the file record indicates that the access is
+ * permitted or zero, if not.
+ *
+ * 'r' for read access check
+ * 'w' for write access check
+ */
+
+#define F_CHKRW(_fil, _c) \
+ (((_c) == 'r' && !((_fil)->f_flags & O_WRONLY)) || \
+ ((_c) == 'w' && ((_fil)->f_flags & (O_WRONLY | O_RDWR))))
+
struct ioctx;
extern struct file *_sysio_fnew(struct inode *ino, int flags);
extern int _sysio_fd_set(struct file *fil, int fd, int force);
extern int _sysio_fd_dup(int oldfd, int newfd, int force);
extern int _sysio_fd_close_all(void);
-#if ZERO_SUM_MEMORY
+#ifdef ZERO_SUM_MEMORY
extern void _sysio_fd_shutdown(void);
#endif
+extern _SYSIO_OFF_T _sysio_lseek_prepare(struct file *fil,
+ _SYSIO_OFF_T offset,
+ int whence,
+ _SYSIO_OFF_T max);