Added statvfs.h header and implemented statvfs() and fstatvfs() - both untested, though.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14746 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/libroot/posix/sys/Jamfile

@@ -10,6 +10,7 @@ KernelMergeObject posix_sys.o :
 	rlimit.c
  	select.c
 	stat.c
+	statvfs.c
  	sysctl.c
  	times.c
  	uio.c

src/system/libroot/posix/sys/statvfs.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <sys/statvfs.h>
+#include <sys/stat.h>
+
+#include <fs_info.h>
+
+
+static int
+fill_statvfs(dev_t device, struct statvfs *statvfs)
+{
+	fs_info info;
+	if (fs_stat_dev(device, &info) < 0)
+		return -1;
+
+	statvfs->f_frsize = statvfs->f_bsize = info.block_size;
+	statvfs->f_blocks = info.total_blocks;
+	statvfs->f_bavail = statvfs->f_bfree = info.free_blocks;
+	statvfs->f_files = info.total_nodes;
+	statvfs->f_favail = statvfs->f_ffree = info.free_nodes;
+	statvfs->f_fsid = device;
+	statvfs->f_flag = info.flags & B_FS_IS_READONLY ? ST_RDONLY : 0;
+	statvfs->f_namemax = B_FILE_NAME_LENGTH;
+
+	return 0;
+}
+
+
+//	#pragma mark -
+
+
+int
+statvfs(const char *path, struct statvfs *statvfs)
+{
+	dev_t device = dev_for_path(path);
+	if (device < 0)
+		return -1;
+
+	return fill_statvfs(device, statvfs);
+}
+
+
+int
+fstatvfs(int fd, struct statvfs *statvfs)
+{
+	struct stat stat;
+	if (fstat(fd, &stat) < 0)
+		return -1;
+
+	return fill_statvfs(stat.st_dev, statvfs);
+}
+