python: Added a Python3 version of ashd.serve.
[ashd.git] / lib / mtio.c
... / ...
CommitLineData
1/*
2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
4
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.
9
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.
14
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/>.
17*/
18
19#include <stdlib.h>
20#include <stdio.h>
21#include <unistd.h>
22#include <fcntl.h>
23#include <string.h>
24#include <errno.h>
25#include <sys/socket.h>
26
27#ifdef HAVE_CONFIG_H
28#include <config.h>
29#endif
30#include <log.h>
31#include <utils.h>
32#include <mt.h>
33#include <mtio.h>
34
35struct stdiofd {
36 int fd;
37 int sock;
38 int timeout;
39};
40
41static ssize_t mtread(void *cookie, char *buf, size_t len)
42{
43 struct stdiofd *d = cookie;
44 int ev;
45 ssize_t ret;
46
47 while(1) {
48 ret = read(d->fd, buf, len);
49 if((ret < 0) && (errno == EAGAIN)) {
50 ev = block(d->fd, EV_READ, d->timeout);
51 if(ev < 0) {
52 /* If we just go on, we should get the real error. */
53 continue;
54 } else if(ev == 0) {
55 errno = ETIMEDOUT;
56 return(-1);
57 } else {
58 continue;
59 }
60 } else {
61 return(ret);
62 }
63 }
64}
65
66static ssize_t mtwrite(void *cookie, const char *buf, size_t len)
67{
68 struct stdiofd *d = cookie;
69 int ev;
70 size_t off;
71 ssize_t ret;
72
73 off = 0;
74 while(off < len) {
75 if(d->sock)
76 ret = send(d->fd, buf + off, len - off, MSG_DONTWAIT | MSG_NOSIGNAL);
77 else
78 ret = write(d->fd, buf + off, len - off);
79 if(ret < 0) {
80 if(errno == EAGAIN) {
81 ev = block(d->fd, EV_WRITE, d->timeout);
82 if(ev < 0) {
83 /* If we just go on, we should get the real error. */
84 continue;
85 } else if(ev == 0) {
86 errno = ETIMEDOUT;
87 return(off);
88 } else {
89 continue;
90 }
91 } else {
92 return(off);
93 }
94 } else {
95 off += ret;
96 }
97 }
98 return(off);
99}
100
101static int mtclose(void *cookie)
102{
103 struct stdiofd *d = cookie;
104
105 close(d->fd);
106 free(d);
107 return(0);
108}
109
110static cookie_io_functions_t iofuns = {
111 .read = mtread,
112 .write = mtwrite,
113 .close = mtclose,
114};
115
116FILE *mtstdopen(int fd, int issock, int timeout, char *mode)
117{
118 struct stdiofd *d;
119 FILE *ret;
120
121 omalloc(d);
122 d->fd = fd;
123 d->sock = issock;
124 d->timeout = timeout;
125 ret = fopencookie(d, mode, iofuns);
126 if(!ret)
127 free(d);
128 else
129 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
130 return(ret);
131}