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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 3.0 SID # 1.2 */ 34 #pragma weak getpw = _getpw 35 36 #include "synonyms.h" 37 #include "file64.h" 38 #include <sys/types.h> 39 #include <mtlib.h> 40 #include <ctype.h> 41 #include <thread.h> 42 #include <synch.h> 43 #include <stdio.h> 44 #include "stdiom.h" 45 #include "libc.h" 46 47 static FILE *pwf; 48 static mutex_t _pwlock = DEFAULTMUTEX; 49 const char *PASSWD = "/etc/passwd"; 50 51 int 52 getpw(uid_t uid, char buf[]) 53 { 54 int n, c; 55 char *bp; 56 FILE *fp; 57 rmutex_t *lk; 58 59 if (pwf == NULL) { 60 fp = fopen(PASSWD, "r"); 61 lmutex_lock(&_pwlock); 62 if (pwf == NULL) { 63 if ((pwf = fp) == NULL) { 64 lmutex_unlock(&_pwlock); 65 return (1); 66 } 67 fp = NULL; 68 } 69 lmutex_unlock(&_pwlock); 70 if (fp != NULL) /* someone beat us to it */ 71 (void) fclose(fp); 72 } 73 74 FLOCKFILE(lk, pwf); 75 _rewind_unlocked(pwf); 76 77 for (;;) { 78 bp = buf; 79 while ((c = GETC(pwf)) != '\n') { 80 if (c == EOF) { 81 FUNLOCKFILE(lk); 82 return (1); 83 } 84 *bp++ = (char)c; 85 } 86 *bp = '\0'; 87 bp = buf; 88 n = 3; 89 while (--n) 90 while ((c = *bp++) != ':') 91 if (c == '\n') { 92 FUNLOCKFILE(lk); 93 return (1); 94 } 95 while ((c = *bp++) != ':') 96 if (isdigit(c)) 97 n = n*10+c-'0'; 98 else 99 continue; 100 if (n == uid) { 101 FUNLOCKFILE(lk); 102 return (0); 103 } 104 } 105 } 106