1999-09-19 14:19:32 +00:00
|
|
|
|
/*
|
|
|
|
|
|
* Copyright (c) 1997 - 1999 Kungliga Tekniska H<EFBFBD>gskolan
|
|
|
|
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
|
|
|
|
* 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.
|
|
|
|
|
|
*
|
2000-01-09 08:31:47 +00:00
|
|
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
1999-09-19 14:19:32 +00:00
|
|
|
|
* may be used to endorse or promote products derived from this software
|
|
|
|
|
|
* without specific prior written permission.
|
|
|
|
|
|
*
|
|
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
|
|
|
|
#include <config.h>
|
2000-01-09 08:31:47 +00:00
|
|
|
|
RCSID("$Id: get_default_username.c,v 1.3 1999/12/02 16:58:46 joda Exp $");
|
1999-09-19 14:19:32 +00:00
|
|
|
|
#endif /* HAVE_CONFIG_H */
|
|
|
|
|
|
|
|
|
|
|
|
#include "roken.h"
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
|
* Try to return what should be considered the default username or
|
|
|
|
|
|
* NULL if we can't guess at all.
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
const char *
|
|
|
|
|
|
get_default_username (void)
|
|
|
|
|
|
{
|
|
|
|
|
|
const char *user;
|
|
|
|
|
|
|
|
|
|
|
|
user = getenv ("USER");
|
|
|
|
|
|
if (user == NULL)
|
|
|
|
|
|
user = getenv ("LOGNAME");
|
|
|
|
|
|
if (user == NULL)
|
|
|
|
|
|
user = getenv ("USERNAME");
|
|
|
|
|
|
|
|
|
|
|
|
#if defined(HAVE_GETLOGIN) && !defined(POSIX_GETLOGIN)
|
|
|
|
|
|
if (user == NULL) {
|
|
|
|
|
|
user = (const char *)getlogin ();
|
|
|
|
|
|
if (user != NULL)
|
|
|
|
|
|
return user;
|
|
|
|
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
#ifdef HAVE_PWD_H
|
|
|
|
|
|
{
|
|
|
|
|
|
uid_t uid = getuid ();
|
|
|
|
|
|
struct passwd *pwd;
|
|
|
|
|
|
|
|
|
|
|
|
if (user != NULL) {
|
2000-01-09 08:31:47 +00:00
|
|
|
|
pwd = k_getpwnam (user);
|
1999-09-19 14:19:32 +00:00
|
|
|
|
if (pwd != NULL && pwd->pw_uid == uid)
|
|
|
|
|
|
return user;
|
|
|
|
|
|
}
|
|
|
|
|
|
pwd = k_getpwuid (uid);
|
|
|
|
|
|
if (pwd != NULL)
|
|
|
|
|
|
return pwd->pw_name;
|
|
|
|
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
return user;
|
|
|
|
|
|
}
|
