first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 155 insertions, 0 deletions

diff --git a/source4/libcli/clireadwrite.c b/source4/libcli/clireadwrite.c
new file mode 100644
index 0000000000..e1d154b283
--- /dev/null
+++ b/source4/libcli/clireadwrite.c
@@ -0,0 +1,155 @@
+/* 
+   Unix SMB/CIFS implementation.
+   client file read/write routines
+   Copyright (C) Andrew Tridgell 1994-1998
+   Copyright (C) James Myers 2003
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/****************************************************************************
+  Read size bytes at offset offset using SMBreadX.
+****************************************************************************/
+ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+{
+	union smb_read parms;
+	int readsize;
+	ssize_t total = 0;
+	
+	if (size == 0) {
+		return 0;
+	}
+
+	parms.readx.level = RAW_READ_READX;
+	parms.readx.in.fnum = fnum;
+
+	/*
+	 * Set readsize to the maximum size we can handle in one readX,
+	 * rounded down to a multiple of 1024.
+	 */
+	readsize = (cli->transport->negotiate.max_xmit - (MIN_SMB_SIZE+32)) & ~1023;
+
+	while (total < size) {
+		NTSTATUS status;
+
+		readsize = MIN(readsize, size-total);
+
+		parms.readx.in.offset    = offset;
+		parms.readx.in.mincnt    = readsize;
+		parms.readx.in.maxcnt    = readsize;
+		parms.readx.in.remaining = size - total;
+		parms.readx.out.data     = buf + total;
+		
+		status = smb_raw_read(cli->tree, &parms);
+		
+		if (!NT_STATUS_IS_OK(status)) {
+			return -1;
+		}
+
+		total += parms.readx.out.nread;
+		offset += parms.readx.out.nread;
+
+		/* If the server returned less than we asked for we're at EOF */
+		if (parms.readx.out.nread < readsize)
+			break;
+	}
+
+	return total;
+}
+
+
+/****************************************************************************
+  write to a file
+  write_mode: 0x0001 disallow write cacheing
+              0x0002 return bytes remaining
+              0x0004 use raw named pipe protocol
+              0x0008 start of message mode named pipe protocol
+****************************************************************************/
+ssize_t cli_write(struct cli_state *cli,
+		  int fnum, uint16 write_mode,
+		  const char *buf, off_t offset, size_t size)
+{
+	union smb_write parms;
+	int block = (cli->transport->negotiate.max_xmit - (MIN_SMB_SIZE+32)) & ~1023;
+	ssize_t total = 0;
+
+	if (size == 0) {
+		return 0;
+	}
+
+	parms.writex.level = RAW_WRITE_WRITEX;
+	parms.writex.in.fnum = fnum;
+	parms.writex.in.wmode = write_mode;
+	parms.writex.in.remaining = 0;
+	
+	while (total < size) {
+		NTSTATUS status;
+
+		block = MIN(block, size - total);
+
+		parms.writex.in.offset = offset;
+		parms.writex.in.count = block;
+		parms.writex.in.data = buf;
+
+		status = smb_raw_write(cli->tree, &parms);
+
+		if (!NT_STATUS_IS_OK(status)) {
+			return -1;
+		}
+
+		offset += parms.writex.out.nwritten;
+		total += parms.writex.out.nwritten;
+		buf += parms.writex.out.nwritten;
+	}
+
+	return total;
+}
+
+/****************************************************************************
+  write to a file using a SMBwrite and not bypassing 0 byte writes
+****************************************************************************/
+ssize_t cli_smbwrite(struct cli_state *cli,
+		     int fnum, char *buf, off_t offset, size_t size1)
+{
+	union smb_write parms;
+	ssize_t total = 0;
+
+	parms.write.level = RAW_WRITE_WRITE;
+	parms.write.in.remaining = 0;
+	
+	do {
+		size_t size = MIN(size1, cli->transport->negotiate.max_xmit - 48);
+		
+		parms.write.in.fnum = fnum;
+		parms.write.in.offset = offset;
+		parms.write.in.count = size;
+		parms.write.in.data = buf + total;
+
+		if (NT_STATUS_IS_ERR(smb_raw_write(cli->tree, &parms)))
+			return -1;
+
+		size = parms.write.out.nwritten;
+		if (size == 0)
+			break;
+
+		size1 -= size;
+		total += size;
+		offset += size;
+	} while (size1);
+
+	return total;
+}