From 8c319ec76a2afa57fad0db66469470d0e1d1eaeb Mon Sep 17 00:00:00 2001
From: Michael Chisholm <chishm@users.sourceforge.net>
Date: Thu, 25 Oct 2007 12:52:08 +0000
Subject: [PATCH] Added statvfs functionality

---
 source/fatdir.c | 45 +++++++++++++++++++++++++++++++++++++++++++--
 source/fatdir.h |  6 ++++++
 source/libfat.c |  6 +++++-
 3 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/source/fatdir.c b/source/fatdir.c
index 1a46c38..a0561c5 100644
--- a/source/fatdir.c
+++ b/source/fatdir.c
@@ -42,9 +42,10 @@
 		
 	2007-01-10 - Chishm
 		* Updated directory iterator functions for DevkitPro r20
-	
-	2007-09-01 - Chishm
+
+	2007-10-25 - Chishm
 		* Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
+		* Added statvfs functionality
 */
 
 #include <string.h>
@@ -438,6 +439,46 @@ int _FAT_mkdir_r (struct _reent *r, const char *path, int mode) {
 	return 0;
 }
 
+int _FAT_statvfs_r (struct _reent *r, const char *path, struct statvfs *buf) 
+{
+	PARTITION* partition = NULL;
+	u32 freeClusterCount;
+
+	// Get the partition of the requested path
+	partition = _FAT_partition_getPartitionFromPath (path);
+	
+	if (partition == NULL) {
+		r->_errno = ENODEV;
+		return -1;
+	}
+
+	freeClusterCount = _FAT_fat_freeClusterCount (partition);
+	
+	// FAT clusters = POSIX blocks
+	buf->f_bsize = partition->bytesPerCluster;		// File system block size. 
+	buf->f_frsize = partition->bytesPerCluster;	// Fundamental file system block size. 
+	
+	buf->f_blocks	= partition->fat.lastCluster - CLUSTER_FIRST; // Total number of blocks on file system in units of f_frsize. 
+	buf->f_bfree = freeClusterCount;	// Total number of free blocks. 
+	buf->f_bavail	= freeClusterCount;	// Number of free blocks available to non-privileged process. 
+
+	// Treat requests for info on inodes as clusters
+	buf->f_files = partition->fat.lastCluster - CLUSTER_FIRST;	// Total number of file serial numbers. 
+	buf->f_ffree = freeClusterCount;	// Total number of free file serial numbers. 
+	buf->f_favail = freeClusterCount;	// Number of file serial numbers available to non-privileged process. 
+	
+	// File system ID. 32bit ioType value
+	buf->f_fsid = _FAT_disc_hostType(partition->disc); 
+	
+	// Bit mask of f_flag values.
+	buf->f_flag = ST_NOSUID /* No support for ST_ISUID and ST_ISGID file mode bits */
+		| (partition->readOnly ? ST_RDONLY /* Read only file system */ : 0 ) ;
+	// Maximum filename length.
+	buf->f_namemax = MAX_FILENAME_LENGTH;	 
+
+	return 0;
+}
+
 DIR_ITER* _FAT_diropen_r(struct _reent *r, DIR_ITER *dirState, const char *path) {
 	DIR_ENTRY dirEntry;
 	DIR_STATE_STRUCT* state = (DIR_STATE_STRUCT*) (dirState->dirStruct);
diff --git a/source/fatdir.h b/source/fatdir.h
index 5ad7b3b..55c8f9f 100644
--- a/source/fatdir.h
+++ b/source/fatdir.h
@@ -36,6 +36,9 @@
 		
 	2007-01-10 - Chishm
 		* Updated directory iterator functions for DevkitPro r20
+
+	2007-10-25 - Chishm
+		* Added statvfs functionality
 */
 
 
@@ -44,6 +47,7 @@
 
 #include <sys/reent.h>
 #include <sys/stat.h>
+#include <sys/statvfs.h>
 #include <sys/iosupport.h>
 #include "common.h"
 #include "directory.h"
@@ -68,6 +72,8 @@ extern int _FAT_rename_r (struct _reent *r, const char *oldName, const char *new
 
 extern int _FAT_mkdir_r (struct _reent *r, const char *path, int mode);
 
+extern int _FAT_statvfs_r (struct _reent *r, const char *path, struct statvfs *buf);
+
 /*
 Directory iterator functions
 */
diff --git a/source/libfat.c b/source/libfat.c
index f4321fc..4271a2f 100644
--- a/source/libfat.c
+++ b/source/libfat.c
@@ -39,6 +39,9 @@
 		
 	2007-01-11 - Chishm
 		* Added missing #include <unistd.h>
+
+	2007-10-25 - Chishm
+		* Added statvfs functionality
 */
 
 #include <sys/iosupport.h>
@@ -72,7 +75,8 @@ const devoptab_t dotab_fat = {
 	_FAT_diropen_r,
 	_FAT_dirreset_r,
 	_FAT_dirnext_r,
-	_FAT_dirclose_r
+	_FAT_dirclose_r,
+	_FAT_statvfs_r
 };
 
 bool fatInit (u32 cacheSize, bool setAsDefaultDevice) {