50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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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/*@null@*/ /*@only@*/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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if (NULL != pw) {
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pw_free (pw);
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}
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}
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return xgetpwuid (ruid);
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}
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