Return to listen.c CVS log

Up to [local] / src / usr.bin / aucat

Annotation of src/usr.bin/aucat/listen.c, Revision 1.2

1.2     ! ratchov     1: /*     $OpenBSD: listen.c,v 1.1 2008/10/26 08:49:44 ratchov Exp $      */
1.1       ratchov     2: /*
                      3:  * Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17: #include <sys/types.h>
                     18: #include <sys/socket.h>
1.2     ! ratchov    19: #include <sys/stat.h>
1.1       ratchov    20: #include <sys/un.h>
                     21:
                     22: #include <err.h>
                     23: #include <errno.h>
                     24: #include <fcntl.h>
                     25: #include <poll.h>
                     26: #include <stdio.h>
                     27: #include <stdlib.h>
                     28: #include <string.h>
                     29: #include <unistd.h>
                     30:
                     31: #include "conf.h"
                     32: #include "sock.h"
                     33: #include "listen.h"
                     34:
                     35: struct fileops listen_ops = {
                     36:        "listen",
                     37:        sizeof(struct listen),
                     38:        listen_close,
                     39:        NULL, /* read */
                     40:        NULL, /* write */
                     41:        NULL, /* start */
                     42:        NULL, /* stop */
                     43:        listen_nfds,
                     44:        listen_pollfd,
                     45:        listen_revents
                     46: };
                     47:
                     48: struct listen *
                     49: listen_new(struct fileops *ops, char *path)
                     50: {
                     51:        int sock;
                     52:        struct sockaddr_un sockname;
                     53:        struct listen *f;
                     54:
                     55:        sock = socket(AF_UNIX, SOCK_STREAM, 0);
                     56:        if (sock < 0) {
                     57:                perror("socket");
                     58:                exit(1);
                     59:        }
                     60:        if (unlink(path) < 0 && errno != ENOENT) {
                     61:                perror("unlink");
                     62:                exit(1);
                     63:        }
                     64:        sockname.sun_family = AF_UNIX;
                     65:        strlcpy(sockname.sun_path, path, sizeof(sockname.sun_path));
                     66:        if (bind(sock, (struct sockaddr *)&sockname,
                     67:                sizeof(struct sockaddr_un)) < 0) {
                     68:                perror("bind");
                     69:                exit(1);
1.2     ! ratchov    70:        }
        !            71:        if (chmod(sockname.sun_path, 0777) < 0) {
        !            72:                /* not fatal, just print error */
        !            73:                perror(sockname.sun_path);
1.1       ratchov    74:        }
                     75:        if (listen(sock, 1) < 0) {
                     76:                perror("listen");
                     77:                exit(1);
                     78:        }
                     79:        f = (struct listen *)file_new(ops, path, 1);
                     80:        f->path = strdup(path);
                     81:        if (f->path == NULL) {
                     82:                perror("strdup");
                     83:                exit(1);
                     84:        }
                     85:        f->fd = sock;
                     86:        return f;
                     87: }
                     88:
                     89: int
                     90: listen_nfds(struct file *f) {
                     91:        return 1;
                     92: }
                     93:
                     94: int
                     95: listen_pollfd(struct file *file, struct pollfd *pfd, int events)
                     96: {
                     97:        struct listen *f = (struct listen *)file;
                     98:
                     99:        pfd->fd = f->fd;
                    100:        pfd->events = POLLIN;
                    101:        return 1;
                    102: }
                    103:
                    104: int
                    105: listen_revents(struct file *file, struct pollfd *pfd)
                    106: {
                    107:        struct listen *f = (struct listen *)file;
                    108:        struct sockaddr caddr;
                    109:        socklen_t caddrlen;
                    110:        int sock;
                    111:
                    112:        if (pfd->revents & POLLIN) {
                    113:                DPRINTF("listen_revents: accepting connection\n");
                    114:                caddrlen = sizeof(caddrlen);
                    115:                sock = accept(f->fd, &caddr, &caddrlen);
                    116:                if (sock < 0) {
                    117:                        perror("accept");
                    118:                        return 0;
                    119:                }
                    120:                if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
                    121:                        perror("fcntl(sock, O_NONBLOCK)");
                    122:                        close(sock);
                    123:                        return 0;
                    124:                }
                    125:                (void)sock_new(&sock_ops, sock, "socket");
                    126:        }
                    127:        return 0;
                    128: }
                    129:
                    130: void
                    131: listen_close(struct file *file)
                    132: {
                    133:        struct listen *f = (struct listen *)file;
                    134:
                    135:        (void)unlink(f->path);
                    136:        free(f->path);
                    137:        (void)close(f->fd);
                    138: }