1 files changed, 145 insertions, 0 deletions
diff --git a/source4/ntvfs/posix/xattr_system.c b/source4/ntvfs/posix/xattr_system.c
new file mode 100644
index 0000000..ebb2010
--- /dev/null
+++ b/source4/ntvfs/posix/xattr_system.c
@@ -0,0 +1,145 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   POSIX NTVFS backend - xattr support using filesystem xattrs
+
+   Copyright (C) Andrew Tridgell 2004
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+
+/*
+  pull a xattr as a blob, from either a file or a file descriptor
+*/
+NTSTATUS pull_xattr_blob_system(struct pvfs_state *pvfs,
+				TALLOC_CTX *mem_ctx,
+				const char *attr_name, 
+				const char *fname, 
+				int fd, 
+				size_t estimated_size,
+				DATA_BLOB *blob)
+{
+	int ret;
+
+	*blob = data_blob_talloc(mem_ctx, NULL, estimated_size+16);
+	if (blob->data == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+again:
+	if (fd != -1) {
+		ret = fgetxattr(fd, attr_name, blob->data, estimated_size);
+	} else {
+		ret = getxattr(fname, attr_name, blob->data, estimated_size);
+	}
+	if (ret == -1 && errno == ERANGE) {
+		estimated_size *= 2;
+		blob->data = talloc_realloc(mem_ctx, blob->data, 
+					    uint8_t, estimated_size);
+		if (blob->data == NULL) {
+			return NT_STATUS_NO_MEMORY;
+		}
+		blob->length = estimated_size;
+		goto again;
+	}
+	if (ret == -1 && errno == EPERM) {
+		struct stat statbuf;
+
+		if (fd != -1) {
+			ret = fstat(fd, &statbuf);
+		} else {
+			ret = stat(fname, &statbuf);
+		}
+		if (ret == 0) {
+			/* check if this is a directory and the sticky bit is set */
+			if (S_ISDIR(statbuf.st_mode) && (statbuf.st_mode & S_ISVTX)) {
+				/* pretend we could not find the xattr */
+
+				data_blob_free(blob);
+				return NT_STATUS_NOT_FOUND;
+
+			} else {
+				/* if not this was probably a legitimate error
+				 * reset ret and errno to the correct values */
+				errno = EPERM;
+				ret = -1;
+			}
+		}
+	}
+
+	if (ret == -1) {
+		data_blob_free(blob);
+		return pvfs_map_errno(pvfs, errno);
+	}
+
+	blob->length = ret;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  push a xattr as a blob, from either a file or a file descriptor
+*/
+NTSTATUS push_xattr_blob_system(struct pvfs_state *pvfs,
+				const char *attr_name, 
+				const char *fname, 
+				int fd, 
+				const DATA_BLOB *blob)
+{
+	int ret;
+
+	if (fd != -1) {
+		ret = fsetxattr(fd, attr_name, blob->data, blob->length, 0);
+	} else {
+		ret = setxattr(fname, attr_name, blob->data, blob->length, 0);
+	}
+	if (ret == -1) {
+		return pvfs_map_errno(pvfs, errno);
+	}
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  delete a xattr
+*/
+NTSTATUS delete_xattr_system(struct pvfs_state *pvfs, const char *attr_name, 
+			     const char *fname, int fd)
+{
+	int ret;
+
+	if (fd != -1) {
+		ret = fremovexattr(fd, attr_name);
+	} else {
+		ret = removexattr(fname, attr_name);
+	}
+	if (ret == -1) {
+		return pvfs_map_errno(pvfs, errno);
+	}
+
+	return NT_STATUS_OK;
+}
+
+/*
+  unlink a file - cleanup any xattrs
+*/
+NTSTATUS unlink_xattr_system(struct pvfs_state *pvfs, const char *fname)
+{
+	/* nothing needs to be done for filesystem based xattrs */
+	return NT_STATUS_OK;
+}