1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __SCCSID("@(#)getlogin.c 8.1 (Berkeley) 6/4/93"); 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <errno.h> 38 #include <pwd.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include "namespace.h" 43 #include <pthread.h> 44 #include "un-namespace.h" 45 46 #include "libc_private.h" 47 48 extern int _getlogin(char *, int); 49 50 char * 51 getlogin(void) 52 { 53 static char logname[MAXLOGNAME]; 54 55 if (_getlogin(logname, sizeof(logname)) < 0) 56 return (NULL); 57 return (logname[0] != '\0' ? logname : NULL); 58 } 59 60 int 61 getlogin_r(char *logname, size_t namelen) 62 { 63 char tmpname[MAXLOGNAME]; 64 int len; 65 66 if (namelen < 1) 67 return (ERANGE); 68 logname[0] = '\0'; 69 70 if (_getlogin(tmpname, sizeof(tmpname)) < 0) 71 return (errno); 72 len = strlen(tmpname) + 1; 73 if (len > namelen) 74 return (ERANGE); 75 strlcpy(logname, tmpname, len); 76 return (0); 77 } 78 79 /* FreeBSD 12 and earlier compat. */ 80 int 81 __getlogin_r_fbsd12(char *logname, int namelen) 82 { 83 if (namelen < 1) 84 return (ERANGE); 85 return (getlogin_r(logname, namelen)); 86 } 87 __sym_compat(getlogin_r, __getlogin_r_fbsd12, FBSD_1.0); 88