| 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 | |
| 35 | struct stdiofd { |
| 36 | int fd; |
| 37 | int sock; |
| 38 | int timeout; |
| 39 | }; |
| 40 | |
| 41 | static 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 | |
| 66 | static 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 | |
| 101 | static int mtclose(void *cookie) |
| 102 | { |
| 103 | struct stdiofd *d = cookie; |
| 104 | |
| 105 | close(d->fd); |
| 106 | free(d); |
| 107 | return(0); |
| 108 | } |
| 109 | |
| 110 | static cookie_io_functions_t iofuns = { |
| 111 | .read = mtread, |
| 112 | .write = mtwrite, |
| 113 | .close = mtclose, |
| 114 | }; |
| 115 | |
| 116 | FILE *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 | } |