1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 /* 33 * getname(name) -- get logname 34 * 35 * getname tries to find the user's logname from: 36 * ${LOGNAME}, if set and if it is telling the truth 37 * /etc/passwd, otherwise 38 * 39 * The logname is returned as the value of the function. 40 * 41 * Getname returns the user's user id converted to ASCII 42 * for unknown lognames. 43 * 44 */ 45 46 #include "string.h" 47 #include "pwd.h" 48 #include "errno.h" 49 #include "sys/types.h" 50 #include "stdlib.h" 51 #include "unistd.h" 52 53 #include "lp.h" 54 55 char * 56 #if defined(__STDC__) 57 getname ( 58 void 59 ) 60 #else 61 getname () 62 #endif 63 { 64 uid_t uid; 65 struct passwd *p; 66 static char *logname = 0; 67 char *l; 68 69 if (logname) 70 return (logname); 71 72 uid = getuid(); 73 74 setpwent (); 75 if ( 76 !(l = getenv("LOGNAME")) 77 || !(p = getpwnam(l)) 78 || p->pw_uid != uid 79 ) 80 if ((p = getpwuid(uid))) 81 l = p->pw_name; 82 else 83 l = 0; 84 endpwent (); 85 86 if (l) 87 logname = Strdup(l); 88 else { 89 if (uid > 0) { 90 logname = Malloc(10 + 1); 91 if (logname) 92 sprintf (logname, "%d", uid); 93 } 94 } 95 96 if (!logname) 97 { 98 errno = ENOMEM; 99 } 100 else 101 { 102 errno = 0; 103 } 104 105 return (logname); 106 } 107