From c46de31dea61c70f3767079894e9f527833f3c22 Mon Sep 17 00:00:00 2001
From: Ingo Weinhold <ingo_weinhold@gmx.de>
Date: Sat, 28 Aug 2004 20:36:53 +0000
Subject: [PATCH] Renamed fs_query.c to fs_query.cpp and implemented the
 function. They don't work yet as the kernel part is not implemented yet.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8700 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kernel/libroot/os/fs_query.c   |  64 ---------------
 src/kernel/libroot/os/fs_query.cpp | 124 +++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+), 64 deletions(-)
 delete mode 100644 src/kernel/libroot/os/fs_query.c
 create mode 100644 src/kernel/libroot/os/fs_query.cpp

diff --git a/src/kernel/libroot/os/fs_query.c b/src/kernel/libroot/os/fs_query.c
deleted file mode 100644
index dd7e2114f3..0000000000
--- a/src/kernel/libroot/os/fs_query.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/* 
-** Copyright 2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
-** Distributed under the terms of the Haiku License.
-*/
-
-
-#include <fs_query.h>
-
-#include <stdlib.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#include "syscalls.h"
-
-// ToDo: implement these for real - the VFS functions are still missing!
-
-#define RETURN_AND_SET_ERRNO(status) \
-	{ \
-		if (status < 0) { \
-			errno = status; \
-			return -1; \
-		} \
-		return status; \
-	}
-
-// for the DIR structure
-#define BUFFER_SIZE 2048
-
-
-DIR *
-fs_open_query(dev_t device, const char *query, uint32 flags)
-{
-	return NULL;
-}
-
-
-DIR *
-fs_open_live_query(dev_t device, const char *query,
-	uint32 flags, port_id port, int32 token)
-{
-	return NULL;
-}
-
-
-int
-fs_close_query(DIR *d)
-{
-	return 0;
-}
-
-
-struct dirent *
-fs_read_query(DIR *d)
-{
-	return NULL;
-}
-
-
-status_t
-get_path_for_dirent(struct dirent *dent, char *buf, size_t len)
-{
-	return B_ERROR;
-}
-
diff --git a/src/kernel/libroot/os/fs_query.cpp b/src/kernel/libroot/os/fs_query.cpp
new file mode 100644
index 0000000000..596f8fbd84
--- /dev/null
+++ b/src/kernel/libroot/os/fs_query.cpp
@@ -0,0 +1,124 @@
+/* 
+** Copyright 2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+** Distributed under the terms of the Haiku License.
+*/
+
+
+#include <fs_query.h>
+
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "syscalls.h"
+
+#define RETURN_AND_SET_ERRNO(status) \
+	{ \
+		if (status < 0) { \
+			errno = status; \
+			return -1; \
+		} \
+		return status; \
+	}
+
+// for the DIR structure
+#define BUFFER_SIZE 2048
+
+
+DIR *
+fs_open_query(dev_t device, const char *query, uint32 flags)
+{
+	// check parameters
+	if (device < 0 || !query) {
+		errno = B_BAD_VALUE;
+		return NULL;
+	}
+	// open
+	int fd = _kern_open_query(device, query, flags, -1, -1);
+	if (fd < 0) {
+		errno = fd;
+		return NULL;
+	}
+	// allocate a DIR
+	DIR *dir = (DIR*)malloc(BUFFER_SIZE);
+	if (!dir) {
+		_kern_close(fd);
+		errno = B_NO_MEMORY;
+		return NULL;
+	}
+	dir->fd = fd;
+	return dir;
+}
+
+
+DIR *
+fs_open_live_query(dev_t device, const char *query,
+	uint32 flags, port_id port, int32 token)
+{
+	// check parameters
+	if (device < 0 || !query || port < 0) {
+		errno = B_BAD_VALUE;
+		return NULL;
+	}
+	flags |= B_LIVE_QUERY;
+	// open
+	int fd = _kern_open_query(device, query, flags, port, token);
+	if (fd < 0) {
+		errno = fd;
+		return NULL;
+	}
+	// allocate a DIR
+	DIR *dir = (DIR*)malloc(BUFFER_SIZE);
+	if (!dir) {
+		_kern_close(fd);
+		errno = B_NO_MEMORY;
+		return NULL;
+	}
+	dir->fd = fd;
+	return dir;
+}
+
+
+int
+fs_close_query(DIR *d)
+{
+	if (!d)
+		RETURN_AND_SET_ERRNO(B_BAD_VALUE);
+	int fd = d->fd;
+	free(d);
+	return _kern_close(fd);
+}
+
+
+struct dirent *
+fs_read_query(DIR *d)
+{
+	// check parameters
+	if (!d) {
+		errno = B_BAD_VALUE;
+		return NULL;
+	}
+	// read
+	int32 bufferSize = BUFFER_SIZE - ((uint8*)&d->ent - (uint8*)d);
+	ssize_t result = _kern_read_dir(d->fd, &d->ent, bufferSize, 1);
+	if (result < 0) {
+		errno = result;
+		return NULL;
+	}
+	if (result == 0) {
+		errno = B_ENTRY_NOT_FOUND;
+		return NULL;
+	}
+	return &d->ent;
+}
+
+
+status_t
+get_path_for_dirent(struct dirent *dent, char *buf, size_t len)
+{
+	if (!dent || !buf)
+		return B_BAD_VALUE;
+	return _kern_entry_ref_to_path(dent->d_pdev, dent->d_pino, dent->d_name,
+		buf, len);
+}
+