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/*
Unix SMB/CIFS implementation.
Copyright (C) Stefan Metzmacher 2009
** NOTE! The following LGPL license applies to the tevent
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/network.h"
#include "system/filesys.h"
#include "tsocket.h"
#include "tsocket_internal.h"
int tsocket_error_from_errno(int ret,
int sys_errno,
bool *retry)
{
*retry = false;
if (ret >= 0) {
return 0;
}
if (ret != -1) {
return EIO;
}
if (sys_errno == 0) {
return EIO;
}
if (sys_errno == EINTR) {
*retry = true;
return sys_errno;
}
if (sys_errno == EINPROGRESS) {
*retry = true;
return sys_errno;
}
if (sys_errno == EAGAIN) {
*retry = true;
return sys_errno;
}
#ifdef EWOULDBLOCK
if (sys_errno == EWOULDBLOCK) {
*retry = true;
return sys_errno;
}
#endif
return sys_errno;
}
int tsocket_simple_int_recv(struct tevent_req *req, int *perrno)
{
enum tevent_req_state state;
uint64_t error;
if (!tevent_req_is_error(req, &state, &error)) {
return 0;
}
switch (state) {
case TEVENT_REQ_NO_MEMORY:
*perrno = ENOMEM;
return -1;
case TEVENT_REQ_TIMED_OUT:
*perrno = ETIMEDOUT;
return -1;
case TEVENT_REQ_USER_ERROR:
*perrno = (int)error;
return -1;
default:
*perrno = EIO;
return -1;
}
*perrno = EIO;
return -1;
}
int tsocket_common_prepare_fd(int fd, bool high_fd)
{
int i;
int sys_errno = 0;
int fds[3];
int num_fds = 0;
int result, flags;
if (fd == -1) {
return -1;
}
/* first make a fd >= 3 */
if (high_fd) {
while (fd < 3) {
fds[num_fds++] = fd;
fd = dup(fd);
if (fd == -1) {
sys_errno = errno;
break;
}
}
for (i=0; i<num_fds; i++) {
close(fds[i]);
}
if (fd == -1) {
errno = sys_errno;
return fd;
}
}
/* fd should be nonblocking. */
#ifdef O_NONBLOCK
#define FLAG_TO_SET O_NONBLOCK
#else
#ifdef SYSV
#define FLAG_TO_SET O_NDELAY
#else /* BSD */
#define FLAG_TO_SET FNDELAY
#endif
#endif
if ((flags = fcntl(fd, F_GETFL)) == -1) {
goto fail;
}
flags |= FLAG_TO_SET;
if (fcntl(fd, F_SETFL, flags) == -1) {
goto fail;
}
#undef FLAG_TO_SET
/* fd should be closed on exec() */
#ifdef FD_CLOEXEC
result = flags = fcntl(fd, F_GETFD, 0);
if (flags >= 0) {
flags |= FD_CLOEXEC;
result = fcntl(fd, F_SETFD, flags);
}
if (result < 0) {
goto fail;
}
#endif
return fd;
fail:
if (fd != -1) {
sys_errno = errno;
close(fd);
errno = sys_errno;
}
return -1;
}
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