73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
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/*****************************************************************************
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*
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* File ..................: mbuseradd/myname.c
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* Purpose ...............: MBSE BBS Shadow Password Suite
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* Last modification date : 25-Jul-2000
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* Original Source .......: Shadow Password Suite
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* Original Copyrioght ...: Julianne Frances Haugh and others.
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*
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*****************************************************************************
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* Copyright (C) 1997-2000
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*****************************************************************************/
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/*
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* myname.c - determine the current username and get the passwd entry
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*
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* Copyright (C) 1996 Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>
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*
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* This code may be freely used, modified and distributed for any purpose.
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* There is no warranty, if it breaks you have to keep both pieces, etc.
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* If you improve it, please send me your changes. Thanks!
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*/
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#include "../config.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <pwd.h>
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struct passwd *get_my_pwent(void)
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{
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struct passwd *pw;
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const char *cp = getlogin();
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uid_t ruid = getuid();
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/*
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* Try getlogin() first - if it fails or returns a non-existent
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* username, or a username which doesn't match the real UID, fall
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* back to getpwuid(getuid()). This should work reasonably with
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* usernames longer than the utmp limit (8 characters), as well as
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* shared UIDs - but not both at the same time...
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*
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* XXX - when running from su, will return the current user (not
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* the original user, like getlogin() does). Does this matter?
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*/
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if (cp && *cp && (pw = getpwnam(cp)) && pw->pw_uid == ruid)
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return pw;
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return getpwuid(ruid);
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}
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