Implement the <sys/statvfs.h> header. Related changes to <sys/types.h>

are still awaiting a worldstone.  Functions and their declarations to
come later.

1 files changed, 77 insertions, 0 deletions

diff --git a/sys/sys/statvfs.h b/sys/sys/statvfs.h
new file mode 100644
index 0000000..89fc148
--- /dev/null
+++ b/sys/sys/statvfs.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2002 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_STATVFS_H_
+#define	_SYS_STATVFS_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+
+/*
+ * POSIX says we must define the fsblkcnt_t and fsfilcnt_t types here.
+ * Note that these must be unsigned integer types, so we have to be
+ * careful in converting the signed statfs members to the unsigned
+ * statvfs members.  (Well, actually, we don't -- see below -- but
+ * a quality implementation should.)
+ */
+#ifndef _FSBLKCNT_T_DECLARED		/* always declared together */
+typedef _BSD_FSBLKCNT_T_ fsblkcnt_t
+typedef _BSD_FSFILCNT_T_ fsfilcnt_t
+#define _FSBLKCNT_T_DECLARED
+#endif
+
+/*
+ * The difference between `avail' and `free' is that `avail' represents
+ * space available to unprivileged processes, whereas `free' includes all
+ * unallocated space, including that reserved for privileged processes.
+ * Or at least, that's the most useful interpretation.  (According to
+ * the letter of the standard, this entire interface is completely
+ * unspecified!)
+ */
+struct statvfs {
+	fsblkcnt_t	f_bavail;	/* Number of blocks */
+	fsblkcnt_t	f_bfree;
+	fsblkcnt_t	f_blocks;
+	fsfilcnt_t	f_favail;	/* Number of files (e.g., inodes) */
+	fsfilcnt_t	f_ffree;
+	fsfilcnt_t	f_files;
+	unsigned long	f_bsize;	/* Size of blocks counted above */
+	unsigned long	f_flag;
+	unsigned long	f_frsize;	/* Size of fragments */
+	unsigned long	f_fsid;		/* Not meaningful */
+	unsigned long	f_namemax;	/* Same as pathconf(_PC_NAME_MAX) */
+};
+
+/* flag bits for f_flag: */
+#define	ST_RDONLY	0x1
+#define	ST_NOSUID	0x2
+
+#endif /* _SYS_STATVFS_H_ */