# 2.11BSD#431 - /usr/src/lib/libc/gen/getlogin.c

##### Functions

    getlogin          X

##### Variables

    _logname_valid    X

       1: /*
       2:  * Copyright (c) 1988, 1993
       3:  *	The Regents of the University of California.  All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if defined(LIBC_SCCS) && !defined(lint)
      35: static char sccsid[] = "@(#)getlogin.c	8.1.1 (2.11BSD) 1997.9.23";
      36: #endif /* LIBC_SCCS and not lint */
      37:
      38: #include <sys/param.h>
      39: #include <pwd.h>
      40: #include <utmp.h>
      41: #include <stdio.h>
      42: #include <string.h>
      43: #include <unistd.h>
      44:
      45: int _logname_valid;     /* known to setlogin() */
      46:
      47: char *
      48: getlogin()
      49: {
      50:     static char logname[MAXLOGNAME + 1];
      51:
      52:     if (_logname_valid == 0) {
      53:         if (_getlogin(logname, sizeof(logname) - 1) < 0)
      54:             return ((char *)NULL);
      55:         _logname_valid = 1;
      56:     }
      57:     return (*logname ? logname : (char *)NULL);
      58: }

#### Defined functions

getlogin defined in line 47; never used

#### Defined variables

_logname_valid defined in line 45; used 4 times

- in line 52-55(2)
- in /usr/src/lib/libc/pdp/sys/setlogin.s line 43, 51

sccsid defined in line 35; never used

Last modified: 1997-09-23 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 479 |