mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-08-23 00:28:59 +00:00
114 lines
3.2 KiB
C
114 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.
|
||
|
*
|
||
|
* $Id: getlogin.c,v 1.1 1997/09/21 06:02:56 gdr Exp $
|
||
|
*
|
||
|
* This file is formatted for tab stops every 8 columns.
|
||
|
*/
|
||
|
|
||
|
#ifdef __ORCAC__
|
||
|
segment "libc_gen__";
|
||
|
#endif
|
||
|
|
||
|
#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/param.h>
|
||
|
#include <pwd.h>
|
||
|
#include <utmp.h>
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
#include <unistd.h>
|
||
|
#include <errno.h>
|
||
|
|
||
|
int _logname_valid; /* known to setlogin() */
|
||
|
|
||
|
static char logname[MAXLOGNAME + 1];
|
||
|
|
||
|
/*
|
||
|
* We don't have the _getlogin(2) and setlogin(2) kernel traps for
|
||
|
* GNO; fake them out.
|
||
|
*/
|
||
|
|
||
|
#ifdef __GNO__
|
||
|
static int
|
||
|
_getlogin (char *buffer, int length)
|
||
|
{
|
||
|
struct passwd *pw;
|
||
|
int len;
|
||
|
|
||
|
if ((pw = getpwuid(getuid())) == NULL) {
|
||
|
return -1;
|
||
|
}
|
||
|
len = strlen(pw->pw_name);
|
||
|
if (len > length) {
|
||
|
return -1;
|
||
|
}
|
||
|
strcpy(buffer, pw->pw_name);
|
||
|
|
||
|
len = strlen(logname);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
int
|
||
|
setlogin (const char *name)
|
||
|
{
|
||
|
if (name == NULL) {
|
||
|
errno = EFAULT;
|
||
|
return -1;
|
||
|
}
|
||
|
if (getuid() != 0) {
|
||
|
errno = EPERM;
|
||
|
return -1;
|
||
|
}
|
||
|
if (strlen(name) > MAXLOGNAME) {
|
||
|
errno = EINVAL;
|
||
|
return -1;
|
||
|
}
|
||
|
strcpy(logname, name);
|
||
|
_logname_valid = 1;
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
char *
|
||
|
getlogin(void)
|
||
|
{
|
||
|
if (_logname_valid == 0) {
|
||
|
if (_getlogin(logname, sizeof(logname) - 1) < 0)
|
||
|
return ((char *)NULL);
|
||
|
_logname_valid = 1;
|
||
|
}
|
||
|
return (*logname ? logname : (char *)NULL);
|
||
|
}
|