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 /* 23 * Copyright (c) 1997, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.3 */ 32 33 /*LINTLIBRARY*/ 34 35 #include <sys/types.h> 36 #include <stdio.h> 37 #include <ctype.h> 38 #include <userdefs.h> 39 #include <users.h> 40 #include <limits.h> 41 42 /* 43 * validate string given as login name. 44 */ 45 int 46 valid_login(char *login, struct passwd **pptr, int *warning) 47 { 48 struct passwd *t_pptr; 49 char *ptr = login; 50 int bad1char, badc, clower, len; 51 char c; 52 53 len = 0; clower = 0; badc = 0; bad1char = 0; 54 *warning = 0; 55 if (!login || !*login) 56 return (INVALID); 57 58 c = *ptr; 59 if (!isalpha(c)) 60 bad1char++; 61 for (; c != NULL; ptr++, c = *ptr) { 62 len++; 63 if (!isprint(c) || (c == ':') || (c == '\n')) 64 return (INVALID); 65 if (!isalnum(c) && c != '_' && c != '-' && c != '.') 66 badc++; 67 if (islower(c)) 68 clower++; 69 } 70 71 /* 72 * XXX length checking causes some operational/compatibility problem. 73 * This has to be revisited in the future as ARC/standards issue. 74 */ 75 if (len > LOGNAME_MAX) 76 *warning = *warning | WARN_NAME_TOO_LONG; 77 if (clower == 0) 78 *warning = *warning | WARN_NO_LOWERCHAR; 79 if (badc != 0) 80 *warning = *warning | WARN_BAD_LOGNAME_CHAR; 81 if (bad1char != 0) 82 *warning = *warning | WARN_BAD_LOGNAME_FIRST; 83 84 if ((t_pptr = getpwnam(login)) != NULL) { 85 if (pptr) *pptr = t_pptr; 86 return (NOTUNIQUE); 87 } 88 return (UNIQUE); 89 } 90