2 * Unix SMB/CIFS implementation.
3 * Samba system utilities
4 * Copyright (C) Andrew Tridgell 1992-1998
5 * Copyright (C) Jeremy Allison 1998-2005
6 * Copyright (C) Timur Bakeyev 2005
7 * Copyright (C) Bjoern Jacke 2006-2007
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "system/filesys.h"
25 #include "lib/util/sys_rw_data.h"
26 #include "lib/util/sys_rw.h"
27 #include "lib/util/iov_buf.h"
29 /****************************************************************************
30 Write all data from an iov array
31 NB. This can be called with a non-socket fd, don't add dependencies
33 ****************************************************************************/
35 ssize_t write_data_iov(int fd, const struct iovec *orig_iov, int iovcnt)
40 struct iovec iov_copy[iovcnt];
43 to_send = iov_buflen(orig_iov, iovcnt);
49 thistime = sys_writev(fd, orig_iov, iovcnt);
50 if ((thistime <= 0) || (thistime == to_send)) {
56 * We could not send everything in one call. Make a copy of iov that
60 memcpy(iov_copy, orig_iov, sizeof(struct iovec) * iovcnt);
63 while (sent < to_send) {
66 ok = iov_advance(&iov, &iovcnt, thistime);
72 thistime = sys_writev(fd, iov, iovcnt);
82 /****************************************************************************
84 NB. This can be called with a non-socket fd, don't add dependencies
86 ****************************************************************************/
88 ssize_t write_data(int fd, const void *buffer, size_t n)
92 iov.iov_base = discard_const_p(void, buffer);
94 return write_data_iov(fd, &iov, 1);
98 * Blocking read n bytes from a fd
101 ssize_t read_data(int fd, void *buffer, size_t n)
109 ret = sys_read(fd, ((char *)buffer) + nread, n - nread);