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 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 /* 31 * getname(name) -- get logname 32 * 33 * getname tries to find the user's logname from: 34 * ${LOGNAME}, if set and if it is telling the truth 35 * /etc/passwd, otherwise 36 * 37 * The logname is returned as the value of the function. 38 * 39 * Getname returns the user's user id converted to ASCII 40 * for unknown lognames. 41 * 42 */ 43 44 #include "string.h" 45 #include "pwd.h" 46 #include "errno.h" 47 #include "sys/types.h" 48 #include "stdlib.h" 49 #include "unistd.h" 50 51 #include "lp.h" 52 53 char * 54 #if defined(__STDC__) 55 getname ( 56 void 57 ) 58 #else 59 getname () 60 #endif 61 { 62 uid_t uid; 63 struct passwd *p; 64 static char *logname = 0; 65 char *l; 66 67 if (logname) 68 return (logname); 69 70 uid = getuid(); 71 72 setpwent (); 73 if ( 74 !(l = getenv("LOGNAME")) 75 || !(p = getpwnam(l)) 76 || p->pw_uid != uid 77 ) 78 if ((p = getpwuid(uid))) 79 l = p->pw_name; 80 else 81 l = 0; 82 endpwent (); 83 84 if (l) 85 logname = Strdup(l); 86 else { 87 if (uid > 0) { 88 logname = Malloc(10 + 1); 89 if (logname) 90 sprintf (logname, "%d", uid); 91 } 92 } 93 94 if (!logname) 95 { 96 errno = ENOMEM; 97 } 98 else 99 { 100 errno = 0; 101 } 102 103 return (logname); 104 } 105