107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 1988, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "@(#)getlogin.c 8.1 (Berkeley) 6/4/93";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <errno.h>
|
|
#include <pwd.h>
|
|
#include <utmp.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "namespace.h"
|
|
#include <pthread.h>
|
|
#include "un-namespace.h"
|
|
|
|
#include "libc_private.h"
|
|
|
|
#define THREAD_LOCK() if (__isthreaded) _pthread_mutex_lock(&logname_mutex)
|
|
#define THREAD_UNLOCK() if (__isthreaded) _pthread_mutex_unlock(&logname_mutex)
|
|
|
|
extern int _getlogin(char *, int);
|
|
|
|
int _logname_valid; /* known to setlogin() */
|
|
static pthread_mutex_t logname_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
static char *
|
|
getlogin_basic(int *status)
|
|
{
|
|
static char logname[MAXLOGNAME];
|
|
|
|
if (_logname_valid == 0) {
|
|
if (_getlogin(logname, sizeof(logname)) < 0) {
|
|
*status = errno;
|
|
return (NULL);
|
|
}
|
|
_logname_valid = 1;
|
|
}
|
|
*status = 0;
|
|
return (*logname ? logname : NULL);
|
|
}
|
|
|
|
char *
|
|
getlogin(void)
|
|
{
|
|
char *result;
|
|
int status;
|
|
|
|
THREAD_LOCK();
|
|
result = getlogin_basic(&status);
|
|
THREAD_UNLOCK();
|
|
return (result);
|
|
}
|
|
|
|
int
|
|
getlogin_r(char *logname, int namelen)
|
|
{
|
|
char *result;
|
|
int len;
|
|
int status;
|
|
|
|
THREAD_LOCK();
|
|
result = getlogin_basic(&status);
|
|
if (status == 0) {
|
|
if ((len = strlen(result) + 1) > namelen)
|
|
status = ERANGE;
|
|
else
|
|
strncpy(logname, result, len);
|
|
}
|
|
THREAD_UNLOCK();
|
|
return (status);
|
|
}
|