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56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini logname implementation for busybox
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*
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* Copyright (C) 2000 Edward Betts <edward@debian.org>.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* BB_AUDIT SUSv3 compliant */
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/* http://www.opengroup.org/onlinepubs/007904975/utilities/logname.html */
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/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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*
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* SUSv3 specifies the string used is that returned from getlogin().
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* The previous implementation used getpwuid() for geteuid(), which
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* is _not_ the same. Erik apparently made this change almost 3 years
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* ago to avoid failing when no utmp was available. However, the
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* correct course of action wrt SUSv3 for a failing getlogin() is
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* a dianostic message and an error return.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "busybox.h"
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extern int logname_main(int argc, char **argv)
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{
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const char *p;
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if (argc > 1) {
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bb_show_usage();
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}
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if ((p = getlogin()) != NULL) {
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puts(p);
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bb_fflush_stdout_and_exit(EXIT_SUCCESS);
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}
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bb_perror_msg_and_die("getlogin");
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}
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