6a228a1b19
MFC after: 3 weeks
195 lines
4.2 KiB
C
195 lines
4.2 KiB
C
/*
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* Copyright (C) 2004
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* Hartmut Brandt.
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* All rights reserved.
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*
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* Author: Harti Brandt <harti@freebsd.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Begemot: bsnmp/lib/support.c,v 1.1 2004/08/06 08:47:58 brandt Exp $
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*
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* Functions that are missing on certain systems.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <string.h>
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#include "support.h"
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#ifndef HAVE_ERR_H
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void
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warnx(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "warning: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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}
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void
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warn(const char *fmt, ...)
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{
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va_list ap;
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int e = errno;
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va_start(ap, fmt);
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fprintf(stderr, "warning: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, ": %s\n", strerror(e));
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va_end(ap);
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}
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void
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errx(int code, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "error: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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exit(code);
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}
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void
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err(int code, const char *fmt, ...)
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{
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va_list ap;
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int e = errno;
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va_start(ap, fmt);
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fprintf(stderr, "error: ");
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, ": %s\n", strerror(e));
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va_end(ap);
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exit(code);
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}
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#endif
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#ifndef HAVE_STRLCPY
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size_t
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strlcpy(char *dst, const char *src, size_t len)
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{
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size_t ret = strlen(dst);
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while (len > 1) {
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*dst++ = *src++;
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len--;
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}
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if (len > 0)
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*dst = '\0';
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return (ret);
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}
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#endif
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#ifndef HAVE_GETADDRINFO
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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extern int h_nerr;
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extern int h_errno;
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extern const char *h_errlist[];
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/*
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* VERY poor man's implementation
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*/
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int
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getaddrinfo(const char *host, const char *port, const struct addrinfo *hints,
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struct addrinfo **res)
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{
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struct hostent *hent;
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struct sockaddr_in *s;
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struct servent *sent;
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if ((hent = gethostbyname(host)) == NULL)
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return (h_errno);
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if (hent->h_addrtype != hints->ai_family)
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return (HOST_NOT_FOUND);
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if (hent->h_addrtype != AF_INET)
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return (HOST_NOT_FOUND);
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if ((*res = malloc(sizeof(**res))) == NULL)
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return (HOST_NOT_FOUND);
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(*res)->ai_flags = hints->ai_flags;
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(*res)->ai_family = hints->ai_family;
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(*res)->ai_socktype = hints->ai_socktype;
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(*res)->ai_protocol = hints->ai_protocol;
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(*res)->ai_next = NULL;
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if (((*res)->ai_addr = malloc(sizeof(struct sockaddr_in))) == NULL) {
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freeaddrinfo(*res);
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return (HOST_NOT_FOUND);
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}
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(*res)->ai_addrlen = sizeof(struct sockaddr_in);
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s = (struct sockaddr_in *)(*res)->ai_addr;
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s->sin_family = hints->ai_family;
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s->sin_len = sizeof(*s);
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memcpy(&s->sin_addr, hent->h_addr, 4);
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if ((sent = getservbyname(port, NULL)) == NULL) {
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freeaddrinfo(*res);
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return (HOST_NOT_FOUND);
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}
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s->sin_port = sent->s_port;
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return (0);
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}
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const char *
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gai_strerror(int e)
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{
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if (e < 0 || e >= h_nerr)
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return ("unknown error");
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return (h_errlist[e]);
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}
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void
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freeaddrinfo(struct addrinfo *p)
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{
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struct addrinfo *next;
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while (p != NULL) {
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next = p->ai_next;
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if (p->ai_addr != NULL)
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free(p->ai_addr);
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free(p);
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p = next;
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}
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}
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#endif
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