155682Smarkm/* 2233294Sstas * Copyright (c) 1997 - 1999 Kungliga Tekniska H��gskolan 3233294Sstas * (Royal Institute of Technology, Stockholm, Sweden). 4233294Sstas * All rights reserved. 555682Smarkm * 6233294Sstas * Redistribution and use in source and binary forms, with or without 7233294Sstas * modification, are permitted provided that the following conditions 8233294Sstas * are met: 955682Smarkm * 10233294Sstas * 1. Redistributions of source code must retain the above copyright 11233294Sstas * notice, this list of conditions and the following disclaimer. 1255682Smarkm * 13233294Sstas * 2. Redistributions in binary form must reproduce the above copyright 14233294Sstas * notice, this list of conditions and the following disclaimer in the 15233294Sstas * documentation and/or other materials provided with the distribution. 1655682Smarkm * 17233294Sstas * 3. Neither the name of the Institute nor the names of its contributors 18233294Sstas * may be used to endorse or promote products derived from this software 19233294Sstas * without specific prior written permission. 2055682Smarkm * 21233294Sstas * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22233294Sstas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23233294Sstas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24233294Sstas * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25233294Sstas * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26233294Sstas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27233294Sstas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28233294Sstas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29233294Sstas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30233294Sstas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31233294Sstas * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#include <config.h> 3555682Smarkm 3655682Smarkm#include "roken.h" 3755682Smarkm 3855682Smarkm/* 3955682Smarkm * Try to return what should be considered the default username or 4055682Smarkm * NULL if we can't guess at all. 4155682Smarkm */ 4255682Smarkm 43233294SstasROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL 4455682Smarkmget_default_username (void) 4555682Smarkm{ 4655682Smarkm const char *user; 4755682Smarkm 4855682Smarkm user = getenv ("USER"); 4955682Smarkm if (user == NULL) 5055682Smarkm user = getenv ("LOGNAME"); 5155682Smarkm if (user == NULL) 5255682Smarkm user = getenv ("USERNAME"); 5355682Smarkm 5455682Smarkm#if defined(HAVE_GETLOGIN) && !defined(POSIX_GETLOGIN) 5555682Smarkm if (user == NULL) { 5655682Smarkm user = (const char *)getlogin (); 5755682Smarkm if (user != NULL) 5855682Smarkm return user; 5955682Smarkm } 6055682Smarkm#endif 6155682Smarkm#ifdef HAVE_PWD_H 6255682Smarkm { 6355682Smarkm uid_t uid = getuid (); 6455682Smarkm struct passwd *pwd; 6555682Smarkm 6655682Smarkm if (user != NULL) { 6755682Smarkm pwd = k_getpwnam (user); 6855682Smarkm if (pwd != NULL && pwd->pw_uid == uid) 6955682Smarkm return user; 7055682Smarkm } 7155682Smarkm pwd = k_getpwuid (uid); 7255682Smarkm if (pwd != NULL) 7355682Smarkm return pwd->pw_name; 7455682Smarkm } 7555682Smarkm#endif 76233294Sstas#ifdef _WIN32 77233294Sstas /* TODO: We can call GetUserNameEx() and figure out a 78233294Sstas username. However, callers do not free the return value of this 79233294Sstas function. */ 80233294Sstas#endif 81233294Sstas 8255682Smarkm return user; 8355682Smarkm} 84