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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "libmail.h"
#include <sys/types.h>
#include <ctype.h>
#ifdef SVR4
#include <sys/utsname.h>
#include <sys/systeminfo.h>
#endif
#define NMLN 512
#ifdef SVR4
#if SYS_NMLN > NMLN
#undef NMLN
#define NMLN SYS_NMLN
#endif
#endif
static char *look4domain(char *, char *, int);
static char *readdomain(char *, int);
/*
* NAME
* maildomain() - retrieve the domain name
*
* SYNOPSIS
* char *maildomain()
*
* DESCRIPTION
* Retrieve the domain name from xgetenv("DOMAIN").
* If that is not set, look in /etc/resolv.conf, /etc/inet/named.boot
* and /etc/named.boot for "^domain[ ]+<domain>".
* If that is not set, use sysinfo(SI_SRPC_DOMAIN) from
* -lnsl. Otherwise, return an empty string.
*/
/* read a file for the domain */
static char *look4domain(char *file, char *buf, int size)
{
char *ret = 0;
FILE *fp = fopen(file, "r");
if (!fp)
return (0);
while (fgets(buf, size, fp))
if (strncmp(buf, "domain", 6) == 0)
if (isspace(buf[6])) {
char *x = skipspace(buf + 6);
if (isgraph(*x)) {
trimnl(x);
strmove(buf, x);
ret = buf;
break;
}
}
(void) fclose(fp);
return (ret);
}
/* read the domain from the xenvironment or one of the files */
static char *readdomain(char *buf, int size)
{
char *ret;
if ((ret = xgetenv("DOMAIN")) != 0) {
(void) strncpy(buf, ret, size);
return (buf);
}
if (((ret = look4domain("/etc/resolv.conf", buf, size)) != 0) ||
((ret = look4domain("/etc/inet/named.boot", buf, size)) != 0) ||
((ret = look4domain("/etc/named.boot", buf, size)) != 0))
return (ret);
#ifdef SVR4
if (sysinfo(SI_SRPC_DOMAIN, buf, size) >= 0)
return (buf);
#endif
return (0);
}
char *
maildomain(void)
{
static char *domain = 0;
static char dombuf[NMLN+1] = ".";
/* if we've already been here, return the info */
if (domain != 0)
return (domain);
domain = readdomain(dombuf+1, NMLN);
/* Make certain that the domain begins with a single dot */
/* and does not have one at the end. */
if (domain) {
size_t len;
domain = dombuf;
while (*domain && *domain == '.')
domain++;
domain--;
len = strlen(domain);
while ((len > 0) && (domain[len-1] == '.'))
domain[--len] = '\0';
}
/* no domain information */
else
domain = "";
return (domain);
}
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