mirror of
https://github.com/samba-team/samba.git
synced 2024-12-22 13:34:15 +03:00
043334f2eb
One case needs a variable declared, so it can be compared to -1 and then cast to size_t for comparison. Signed-off-by: Martin Schwenke <martin@meltin.net> Reviewed-by: Andreas Schneider <asn@samba.org> Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org> Autobuild-Date(master): Mon Jul 1 08:00:29 UTC 2019 on sn-devel-184
118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
/*
|
|
* Unix SMB/CIFS implementation.
|
|
* Samba system utilities
|
|
* Copyright (C) Andrew Tridgell 1992-1998
|
|
* Copyright (C) Jeremy Allison 1998-2005
|
|
* Copyright (C) Timur Bakeyev 2005
|
|
* Copyright (C) Bjoern Jacke 2006-2007
|
|
*
|
|
* 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 "replace.h"
|
|
#include "system/filesys.h"
|
|
#include "lib/util/sys_rw_data.h"
|
|
#include "lib/util/sys_rw.h"
|
|
#include "lib/util/iov_buf.h"
|
|
|
|
/****************************************************************************
|
|
Write all data from an iov array
|
|
NB. This can be called with a non-socket fd, don't add dependencies
|
|
on socket calls.
|
|
****************************************************************************/
|
|
|
|
ssize_t write_data_iov(int fd, const struct iovec *orig_iov, int iovcnt)
|
|
{
|
|
ssize_t to_send;
|
|
ssize_t thistime;
|
|
size_t sent;
|
|
struct iovec iov_copy[iovcnt];
|
|
struct iovec *iov;
|
|
|
|
to_send = iov_buflen(orig_iov, iovcnt);
|
|
if (to_send == -1) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
thistime = sys_writev(fd, orig_iov, iovcnt);
|
|
if ((thistime <= 0) || (thistime == to_send)) {
|
|
return thistime;
|
|
}
|
|
sent = thistime;
|
|
|
|
/*
|
|
* We could not send everything in one call. Make a copy of iov that
|
|
* we can mess with.
|
|
*/
|
|
|
|
memcpy(iov_copy, orig_iov, sizeof(struct iovec) * iovcnt);
|
|
iov = iov_copy;
|
|
|
|
while (sent < (size_t)to_send) {
|
|
bool ok;
|
|
|
|
ok = iov_advance(&iov, &iovcnt, thistime);
|
|
if (!ok) {
|
|
errno = EIO;
|
|
return -1;
|
|
}
|
|
|
|
thistime = sys_writev(fd, iov, iovcnt);
|
|
if (thistime <= 0) {
|
|
break;
|
|
}
|
|
sent += thistime;
|
|
}
|
|
|
|
return sent;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Write data to a fd.
|
|
NB. This can be called with a non-socket fd, don't add dependencies
|
|
on socket calls.
|
|
****************************************************************************/
|
|
|
|
ssize_t write_data(int fd, const void *buffer, size_t n)
|
|
{
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = discard_const_p(void, buffer);
|
|
iov.iov_len = n;
|
|
return write_data_iov(fd, &iov, 1);
|
|
}
|
|
|
|
/*
|
|
* Blocking read n bytes from a fd
|
|
*/
|
|
|
|
ssize_t read_data(int fd, void *buffer, size_t n)
|
|
{
|
|
ssize_t nread;
|
|
|
|
nread = 0;
|
|
|
|
while ((size_t)nread < n) {
|
|
ssize_t ret;
|
|
ret = sys_read(fd, ((char *)buffer) + nread, n - nread);
|
|
if (ret <= 0) {
|
|
return ret;
|
|
}
|
|
nread += ret;
|
|
}
|
|
|
|
return nread;
|
|
}
|