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1/* $OpenBSD: evutil.c,v 1.11 2019/06/28 13:32:42 deraadt Exp $ */
2
3/*
4 * Copyright (c) 2007 Niels Provos <provos@citi.umich.edu>
5 * All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <sys/socket.h>
32#include <sys/queue.h>
33
34#include <unistd.h>
35#include <fcntl.h>
36#include <stdlib.h>
37#include <errno.h>
38#include <stdio.h>
39#include <signal.h>
40
41#include "event.h"
42#include "event-internal.h"
43#include "evutil.h"
44#include "log.h"
45
46int
47evutil_socketpair(int family, int type, int protocol, int fd[2])
48{
49 return socketpair(family, type, protocol, fd);
50}
51
52int
53evutil_make_socket_nonblocking(int fd)
54{
55 int flags;
56
57 if ((flags = fcntl(fd, F_GETFL)) == -1) {
58 event_warn("fcntl(%d, F_GETFL)", fd);
59 return -1;
60 }
61 if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
62 event_warn("fcntl(%d, F_SETFL)", fd);
63 return -1;
64 }
65 return 0;
66}
67
68ev_int64_t
69evutil_strtoll(const char *s, char **endptr, int base)
70{
71 return (ev_int64_t)strtoll(s, endptr, base);
72}
73
74int
75evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
76{
77 int r;
78 va_list ap;
79 va_start(ap, format);
80 r = evutil_vsnprintf(buf, buflen, format, ap);
81 va_end(ap);
82 return r;
83}
84
85int
86evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
87{
88 int r = vsnprintf(buf, buflen, format, ap);
89 buf[buflen-1] = '\0';
90 return r;
91}
92
93static int
94evutil_issetugid(void)
95{
96 return issetugid();
97}
98
99const char *
100evutil_getenv(const char *varname)
101{
102 if (evutil_issetugid())
103 return NULL;
104
105 return getenv(varname);
106}