70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
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* Copyright (c) 1996 - 1997, Marek Michałkiewicz
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* Copyright (c) 2003 - 2005, Tomasz Kłoczko
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* Copyright (c) 2007 - 2008, Nicolas François
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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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* 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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* 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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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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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*/
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#include <config.h>
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#ident "$Id$"
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#include "defines.h"
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#include <pwd.h>
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#include "prototypes.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 ((NULL != cp) && ('\0' != *cp)) {
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pw = xgetpwnam (cp);
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if ((NULL != pw) && (pw->pw_uid == ruid)) {
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return pw;
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}
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}
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return xgetpwuid (ruid);
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}
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