121 lines
3.5 KiB
C
121 lines
3.5 KiB
C
/* $NetBSD: ypalias_init.c,v 1.1 2009/06/20 19:27:26 christos Exp $ */
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/*
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* Copyright (c) 2009 The NetBSD Foundation
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* All rights reserved.
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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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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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/* Code contributed by Greywolf <greywolf@starwolf.com>
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* 28 August 2003. All rights released to The NetBSD Foundation.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: ypalias_init.c,v 1.1 2009/06/20 19:27:26 christos Exp $");
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#endif
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <paths.h>
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#include <errno.h>
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#include "ypalias_init.h"
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#ifndef _PATH_YPNICKNAMES
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#define _PATH_YPNICKNAMES "/var/yp/nicknames"
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#endif
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const struct ypalias def_ypaliases[] = {
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{ "passwd", "passwd.byname" },
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{ "group", "group.byname" },
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{ "networks", "networks.byaddr" },
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{ "hosts", "hosts.byaddr" },
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{ "protocols", "protocols.bynumber" },
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{ "services", "services.byname" },
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{ "aliases", "mail.aliases" },
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{ "ethers", "ethers.byname" },
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{ NULL, NULL },
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};
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const struct ypalias *
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ypalias_init(void)
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{
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FILE *fp;
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char *cp, *line;
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struct ypalias *ypa, *nypa;
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size_t nypalias = 50;
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size_t i, len, lineno;
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if ((fp = fopen(_PATH_YPNICKNAMES, "r")) == NULL)
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return &def_ypaliases[0];
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if ((ypa = calloc(sizeof(*ypa), nypalias)) == NULL)
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goto out;
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lineno = 1;
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for (i = 0; (line = fparseln(fp, &len, &lineno, NULL,
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FPARSELN_UNESCALL));) {
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cp = line;
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/* Ignore malformed lines */
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if ((ypa[i].alias = strsep(&line, " \t\n")) == NULL ||
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(ypa[i].name = strsep(&line, " \t\n")) == NULL ||
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ypa[i].alias != cp) {
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warnx("%s, %zu: syntax error, ignored",
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_PATH_YPNICKNAMES, lineno);
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free(cp);
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} else
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i++;
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if (i == nypalias) {
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nypalias <<= 1;
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nypa = realloc(ypa, sizeof(*ypa) * nypalias);
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if (nypa == NULL)
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goto out;
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ypa = nypa;
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}
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}
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ypa[i].alias = ypa[i].name = NULL;
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i++;
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(void)fclose(fp);
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if ((nypa = realloc(ypa, sizeof(*ypa) * i)) != NULL)
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return nypa;
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out:
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warn("Cannot alllocate alias space, returning default list");
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if (ypa) {
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do
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free(__UNCONST(ypa[--i].alias));
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while (i != 0);
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free(ypa);
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}
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(void)fclose(fp);
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return def_ypaliases;
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return ypa;
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}
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