source: rtems/cpukit/libnetworking/libc/herror.c @ ff0f694d

/*
 * Copyright (c) 1987, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Portions Copyright (c) 1996 by Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)herror.c    8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>
#include <sys/uio.h>
#include <netdb.h>
#include <string.h>
#include <unistd.h>

const char *h_errlist[] = {
        "Resolver Error 0 (no error)",
        "Unknown host",                         /* 1 HOST_NOT_FOUND */
        "Host name lookup failure",             /* 2 TRY_AGAIN */
        "Unknown server error",                 /* 3 NO_RECOVERY */
        "No address associated with name",      /* 4 NO_ADDRESS */
};
int     h_nerr = { sizeof h_errlist / sizeof h_errlist[0] };

int     h_errno;

/*
 * herror --
 *      print the error indicated by the h_errno value.
 */
void
herror(s)
        const char *s;
{
#if 0
        struct iovec iov[4];
        register struct iovec *v = iov;

        if (s && *s) {
                v->iov_base = (char *)s;
                v->iov_len = strlen(s);
                v++;
                v->iov_base = ": ";
                v->iov_len = 2;
                v++;
        }
        v->iov_base = (char *)hstrerror(h_errno);
        v->iov_len = strlen(v->iov_base);
        v++;
        v->iov_base = "\n";
        v->iov_len = 1;
        writev(STDERR_FILENO, iov, (v - iov) + 1);
#else
        /*
         * RTEMS: no writev yet
         */
        if (s && *s) {
                write (2, s, strlen (s));
                write (2, ": ", 2);
        }
        s = (char *)hstrerror(h_errno);
        write (2, s, strlen (s));
        write (2, "\n", 1);
#endif
}

const char *
hstrerror(err)
        int err;
{
        if (err < 0)
                return ("Resolver internal error");
        else if (err < h_nerr)
                return (h_errlist[err]);
        return ("Unknown resolver error");
}