95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
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/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H<EFBFBD>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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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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*
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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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*
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Kungliga Tekniska
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* H<EFBFBD>gskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 THE INSTITUTE 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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#include "krb_locl.h"
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RCSID("$Id: get_default_principal.c,v 1.10 1997/04/01 08:18:28 joda Exp $");
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int
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krb_get_default_principal(char *name, char *instance, char *realm)
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{
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char *file;
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int ret;
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char *p;
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if ((file = getenv("KRBTKFILE")) == NULL)
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file = TKT_FILE;
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ret = krb_get_tf_fullname(file, name, instance, realm);
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if(ret == KSUCCESS)
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return 0;
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p = getenv("KRB4PRINCIPAL");
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if(p && kname_parse(name, instance, realm, p) == KSUCCESS)
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return 1;
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#ifdef HAVE_PWD_H
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{
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struct passwd *pw;
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pw = getpwuid(getuid());
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if(pw == NULL){
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return -1;
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}
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strcpy(name, pw->pw_name);
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strcpy(instance, "");
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krb_get_lrealm(realm, 1);
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if(strcmp(name, "root") == 0){
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p = NULL;
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#if defined(HAVE_GETLOGIN) && !defined(POSIX_GETLOGIN)
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p = getlogin();
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#endif
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if(p == NULL)
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p = getenv("USER");
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if(p == NULL)
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p = getenv("LOGNAME");
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if(p){
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strncpy (name, p, ANAME_SZ);
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name[ANAME_SZ - 1] = '\0';
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strcpy(instance, "root");
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}
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}
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return 1;
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}
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#endif
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return -1;
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}
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