udevd - bring into sbin, add rc script
[dragonfly.git] / sbin / udevd / udevd_socket.c
CommitLineData
3a3826b3
AH
1/*
2 * Copyright (c) 2010 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34#include <sys/types.h>
35#include <sys/device.h>
36#include <sys/wait.h>
37#include <sys/socket.h>
38#include <sys/un.h>
39
40#include <err.h>
41#include <errno.h>
42#include <fcntl.h>
43#include <libgen.h>
44#include <regex.h>
45#include <signal.h>
46#include <stdarg.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <syslog.h>
51#include <unistd.h>
52
53#include <libprop/proplib.h>
54#include <sys/udev.h>
55#include "udevd.h"
56
57int
58send_xml(int s, char *xml)
59{
60 ssize_t r,n;
61 size_t sz;
62
63 sz = strlen(xml) + 1;
64
65 r = send(s, &sz, sizeof(sz), 0);
66 if (r <= 0)
67 return r;
68
69 r = 0;
70 while (r < (ssize_t)sz) {
71 n = send(s, xml+r, sz-r, 0);
72 if (n <= 0)
73 return n;
74 r += n;
75 }
76
77 return r;
78}
79
80int
81read_xml(int s, char *buf, size_t buf_sz)
82{
83 size_t sz;
84 int n, r;
85
86 n = recv(s, &sz, sizeof(sz), MSG_WAITALL);
87 if (n <= 0)
88 return n;
89
90 r = 0;
91 while ((r < (ssize_t)sz) && (r < (ssize_t)buf_sz)) {
92 n = recv(s, buf+r, sz-r, MSG_WAITALL);
93 if (n <= 0)
94 return n;
95 r += n;
96 }
97
98 return r;
99}
100
101int
102unblock_descriptor(int s)
103{
104 int flags, ret;
105
106 flags = fcntl(s, F_GETFL, 0);
107 ret = fcntl(s, F_SETFL, flags | O_NONBLOCK);
108 return ret;
109}
110
111int
112block_descriptor(int s)
113{
114 int flags, ret;
115
116 flags = fcntl(s, F_GETFL, 0);
117 ret = fcntl(s, F_SETFL, flags & ~O_NONBLOCK);
118 return ret;
119}
120
121int
122init_local_server(const char *sockfile, int socktype, int nonblock)
123{
124 int s;
125 struct sockaddr_un un_addr;
126
127 if ((s = socket(AF_UNIX, socktype, 0)) < 0)
128 return -1;
129
130 memset(&un_addr, 0, sizeof(un_addr));
131 un_addr.sun_family = AF_UNIX;
132 strncpy(un_addr.sun_path, sockfile, SOCKFILE_NAMELEN);
133 un_addr.sun_path[SOCKFILE_NAMELEN - 1] = '\0';
134
135 /*
136 * DO NOT change `un_addr.sun_path' to `sockfile' here,
137 * since `sockfile' may have been truncated by above strncpy(3).
138 */
139 unlink(un_addr.sun_path);
140
141 if (nonblock && unblock_descriptor(s) < 0) {
142 close(s);
143 return -1;
144 }
145
146 if (bind(s, (struct sockaddr *)&un_addr, sizeof(un_addr)) < 0) {
147 close(s);
148 return -1;
149 }
150
151 if (socktype == SOCK_STREAM && listen(s, LOCAL_BACKLOG) < 0) {
152 close(s);
153 return -1;
154 }
155
156 return s;
157}