2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/select.h>
27 #include <sys/socket.h>
38 struct blocker *n, *p;
45 static struct blocker *blockers;
47 int block(int fd, int ev, time_t to)
56 bl->to = time(NULL) + to;
76 fd_set rfds, wfds, efds;
77 struct blocker *bl, *nbl;
83 while(blockers != NULL) {
90 for(bl = blockers; bl; bl = bl->n) {
92 FD_SET(bl->fd, &rfds);
94 FD_SET(bl->fd, &wfds);
95 FD_SET(bl->fd, &efds);
98 if((bl->to != 0) && ((timeout == 0) || (timeout > bl->to)))
101 toval.tv_sec = timeout - now;
103 ret = select(maxfd + 1, &rfds, &wfds, &efds, timeout?(&toval):NULL);
106 flog(LOG_CRIT, "ioloop: select errored out: %s", strerror(errno));
107 /* To avoid CPU hogging in case it's bad, which it
113 for(bl = blockers; bl; bl = nbl) {
116 if(FD_ISSET(bl->fd, &rfds))
118 if(FD_ISSET(bl->fd, &wfds))
120 if(FD_ISSET(bl->fd, &efds))
122 if((ev < 0) || (ev & bl->ev))
124 else if((bl->to != 0) && (bl->to <= now))
136 static ssize_t mtread(void *cookie, char *buf, size_t len)
138 struct stdiofd *d = cookie;
143 ret = read(d->fd, buf, len);
144 if((ret < 0) && (errno == EAGAIN)) {
145 ev = block(d->fd, EV_READ, d->timeout);
147 /* If we just go on, we should get the real error. */
161 static ssize_t mtwrite(void *cookie, const char *buf, size_t len)
163 struct stdiofd *d = cookie;
171 ret = send(d->fd, buf + off, len - off, MSG_DONTWAIT | MSG_NOSIGNAL);
173 ret = write(d->fd, buf + off, len - off);
175 if(errno == EAGAIN) {
176 ev = block(d->fd, EV_WRITE, d->timeout);
178 /* If we just go on, we should get the real error. */
196 static int mtclose(void *cookie)
198 struct stdiofd *d = cookie;
205 static cookie_io_functions_t iofuns = {
211 FILE *mtstdopen(int fd, int issock, int timeout, char *mode)
219 d->timeout = timeout;
220 ret = fopencookie(d, mode, iofuns);
224 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);