mirror of
https://github.com/samba-team/samba.git
synced 2025-06-19 23:17:05 +03:00
735e98759c
GetTimeOfDay() seems to no longer be exported. For the smbsh example, just use the native gettimeofday() for now. (This used to be commit 296a6783fbc03460e87ac4136a0a9e6d2743b2ff)
123 lines
3.8 KiB
C
123 lines
3.8 KiB
C
/*
|
|
Unix SMB/Netbios implementation.
|
|
Version 3.0
|
|
Samba select/poll implementation
|
|
Copyright (C) Andrew Tridgell 1992-1998
|
|
Copyright (C) Derrell Lipman 2003-2005
|
|
|
|
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/>.
|
|
*/
|
|
|
|
/*
|
|
* WHY THIS FILE?
|
|
*
|
|
* This file implements the two functions in the select() family, as required
|
|
* by samba. The samba native functions, though, implement a pipe to help
|
|
* alleviate a deadlock problem, but which creates problems of its own (the
|
|
* timeout stops working correctly). Those functions also require that all
|
|
* signal handlers call a function which writes to the pipe -- a task which is
|
|
* difficult to do in the smbwrapper environment.
|
|
*/
|
|
|
|
|
|
#include <sys/select.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
|
|
int sys_select(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
|
|
{
|
|
int ret;
|
|
fd_set *readfds2, readfds_buf;
|
|
|
|
/* If readfds is NULL we need to provide our own set. */
|
|
if (readfds) {
|
|
readfds2 = readfds;
|
|
} else {
|
|
readfds2 = &readfds_buf;
|
|
FD_ZERO(readfds2);
|
|
}
|
|
|
|
errno = 0;
|
|
ret = select(maxfd,readfds2,writefds,errorfds,tval);
|
|
|
|
if (ret <= 0) {
|
|
FD_ZERO(readfds2);
|
|
if (writefds)
|
|
FD_ZERO(writefds);
|
|
if (errorfds)
|
|
FD_ZERO(errorfds);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*******************************************************************
|
|
Similar to sys_select() but catch EINTR and continue.
|
|
This is what sys_select() used to do in Samba.
|
|
********************************************************************/
|
|
|
|
int sys_select_intr(int maxfd, fd_set *readfds, fd_set *writefds, fd_set *errorfds, struct timeval *tval)
|
|
{
|
|
int ret;
|
|
fd_set *readfds2, readfds_buf, *writefds2, writefds_buf, *errorfds2, errorfds_buf;
|
|
struct timeval tval2, *ptval, end_time, now_time;
|
|
|
|
readfds2 = (readfds ? &readfds_buf : NULL);
|
|
writefds2 = (writefds ? &writefds_buf : NULL);
|
|
errorfds2 = (errorfds ? &errorfds_buf : NULL);
|
|
if (tval) {
|
|
gettimeofday(&end_time, NULL);
|
|
end_time.tv_sec += tval->tv_sec;
|
|
end_time.tv_usec += tval->tv_usec;
|
|
end_time.tv_sec += end_time.tv_usec / 1000000;
|
|
end_time.tv_usec %= 1000000;
|
|
ptval = &tval2;
|
|
} else {
|
|
ptval = NULL;
|
|
}
|
|
|
|
do {
|
|
if (readfds)
|
|
readfds_buf = *readfds;
|
|
if (writefds)
|
|
writefds_buf = *writefds;
|
|
if (errorfds)
|
|
errorfds_buf = *errorfds;
|
|
if (tval) {
|
|
gettimeofday(&now_time, NULL);
|
|
tval2.tv_sec = end_time.tv_sec - now_time.tv_sec;
|
|
tval2.tv_usec = end_time.tv_usec - now_time.tv_usec;
|
|
if ((signed long) tval2.tv_usec < 0) {
|
|
tval2.tv_usec += 1000000;
|
|
tval2.tv_sec--;
|
|
}
|
|
if ((signed long) tval2.tv_sec < 0) {
|
|
ret = 0;
|
|
break; /* time has already elapsed */
|
|
}
|
|
}
|
|
|
|
ret = sys_select(maxfd, readfds2, writefds2, errorfds2, ptval);
|
|
} while (ret == -1 && errno == EINTR);
|
|
|
|
if (readfds)
|
|
*readfds = readfds_buf;
|
|
if (writefds)
|
|
*writefds = writefds_buf;
|
|
if (errorfds)
|
|
*errorfds = errorfds_buf;
|
|
|
|
return ret;
|
|
}
|