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 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma weak _getgrnam = getgrnam 31 #pragma weak _getgrgid = getgrgid 32 33 #include "lint.h" 34 #include <sys/types.h> 35 #include <grp.h> 36 #include <nss_dbdefs.h> 37 #include <stdio.h> 38 #include "tsd.h" 39 40 #ifdef NSS_INCLUDE_UNSAFE 41 42 extern size_t _nss_get_bufsizes(int arg); 43 44 /* 45 * Ye olde non-reentrant interface (MT-unsafe, caveat utor) 46 */ 47 48 static void 49 free_grbuf(void *arg) 50 { 51 nss_XbyY_buf_t **buffer = arg; 52 53 NSS_XbyY_FREE(buffer); 54 } 55 56 static nss_XbyY_buf_t * 57 get_grbuf(int max_buf) 58 { 59 nss_XbyY_buf_t **buffer = 60 tsdalloc(_T_GRBUF, sizeof (nss_XbyY_buf_t *), free_grbuf); 61 nss_XbyY_buf_t *b; 62 size_t blen; 63 64 if (buffer == NULL) 65 return (NULL); 66 if (max_buf == 0) 67 blen = _nss_get_bufsizes(0); /* default size */ 68 else 69 blen = sysconf(_SC_GETGR_R_SIZE_MAX); /* max size */ 70 if (*buffer) { 71 if ((*buffer)->buflen >= blen) /* existing size fits */ 72 return (*buffer); 73 NSS_XbyY_FREE(buffer); /* existing is too small */ 74 } 75 b = NSS_XbyY_ALLOC(buffer, sizeof (struct group), blen); 76 return (b); 77 } 78 79 struct group * 80 getgrgid(gid_t gid) 81 { 82 nss_XbyY_buf_t *b = get_grbuf(0); 83 struct group *ret; 84 85 if (b == NULL) 86 return (NULL); 87 88 ret = getgrgid_r(gid, b->result, b->buffer, b->buflen); 89 if (ret == NULL && errno == ERANGE) { 90 b = get_grbuf(1); 91 if (b == NULL) 92 return (NULL); 93 ret = getgrgid_r(gid, b->result, b->buffer, b->buflen); 94 } 95 return (ret); 96 } 97 98 struct group * 99 getgrnam(const char *nam) 100 { 101 nss_XbyY_buf_t *b = get_grbuf(0); 102 struct group *ret; 103 104 if (b == NULL) 105 return (NULL); 106 107 ret = getgrnam_r(nam, b->result, b->buffer, b->buflen); 108 if (ret == NULL && errno == ERANGE && nam != NULL) { 109 b = get_grbuf(1); 110 if (b == NULL) 111 return (NULL); 112 ret = getgrnam_r(nam, b->result, b->buffer, b->buflen); 113 } 114 return (ret); 115 } 116 117 struct group * 118 getgrent(void) 119 { 120 nss_XbyY_buf_t *b = get_grbuf(1); 121 122 return (b == NULL ? NULL : 123 getgrent_r(b->result, b->buffer, b->buflen)); 124 } 125 126 struct group * 127 fgetgrent(FILE *f) 128 { 129 nss_XbyY_buf_t *b = get_grbuf(1); 130 131 return (b == NULL ? NULL : 132 fgetgrent_r(f, b->result, b->buffer, b->buflen)); 133 } 134 135 #endif /* NSS_INCLUDE_UNSAFE */ 136