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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* Copyright (c) 1988 AT&T */ 29 /* All Rights Reserved */ 30 31 32 /* 3.0 SID # 1.2 */ 33 #pragma weak getpw = _getpw 34 35 #include "synonyms.h" 36 #include "file64.h" 37 #include <sys/types.h> 38 #include <mtlib.h> 39 #include <ctype.h> 40 #include <thread.h> 41 #include <synch.h> 42 #include <stdio.h> 43 #include "stdiom.h" 44 #include "libc.h" 45 46 static FILE *pwf; 47 static mutex_t _pwlock = DEFAULTMUTEX; 48 const char *PASSWD = "/etc/passwd"; 49 50 int 51 getpw(uid_t uid, char buf[]) 52 { 53 int n, c; 54 char *bp; 55 FILE *fp; 56 rmutex_t *lk; 57 58 if (pwf == NULL) { 59 fp = fopen(PASSWD, "rF"); 60 lmutex_lock(&_pwlock); 61 if (pwf == NULL) { 62 if ((pwf = fp) == NULL) { 63 lmutex_unlock(&_pwlock); 64 return (1); 65 } 66 fp = NULL; 67 } 68 lmutex_unlock(&_pwlock); 69 if (fp != NULL) /* someone beat us to it */ 70 (void) fclose(fp); 71 } 72 73 FLOCKFILE(lk, pwf); 74 _rewind_unlocked(pwf); 75 76 for (;;) { 77 bp = buf; 78 while ((c = GETC(pwf)) != '\n') { 79 if (c == EOF) { 80 FUNLOCKFILE(lk); 81 return (1); 82 } 83 *bp++ = (char)c; 84 } 85 *bp = '\0'; 86 bp = buf; 87 n = 3; 88 while (--n) 89 while ((c = *bp++) != ':') 90 if (c == '\n') { 91 FUNLOCKFILE(lk); 92 return (1); 93 } 94 while ((c = *bp++) != ':') 95 if (isdigit(c)) 96 n = n*10+c-'0'; 97 else 98 continue; 99 if (n == uid) { 100 FUNLOCKFILE(lk); 101 return (0); 102 } 103 } 104 } 105