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 2007 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 #include <c_synonyms.h> 29 #include <unistd.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <libgen.h> 33 #include <attr.h> 34 #include <fcntl.h> 35 #include <errno.h> 36 #include "libcmdutils.h" 37 38 /* 39 * Returns the status of attempting to obtain the extended system 40 * attributes in the specified view. 41 * 42 * Note: If obtaining status for an extended attribute file, the caller must 43 * chdir into the hidden directory prior to calling sysattr_status(). 44 * 45 * Returns 1 if the extended system attributes were obtained, otherwise 46 * returns 0. 47 */ 48 int 49 sysattr_status(char *file, xattr_view_t view) 50 { 51 nvlist_t *response; 52 int saveerrno; 53 int status; 54 55 if (nvlist_alloc(&response, NV_UNIQUE_NAME, 0) != 0) { 56 return (0); 57 } 58 59 status = getattrat(AT_FDCWD, view, file, &response); 60 61 saveerrno = errno; 62 (void) nvlist_free(response); 63 errno = saveerrno; 64 65 return (status == 0); 66 } 67 68 /* 69 * Returns the type of the specified in file. If the file name matches 70 * the name of either a read-only or read-write extended system attribute 71 * file then sysattr_type() returns the type of file: 72 * return value file type 73 * ------------ --------- 74 * _RO_SATTR read-only extended system attribute file 75 * _RW_SATTR read-write extended system attribute file 76 * _NOT_SATTR neither a read-only or read-write extended system 77 * attribute file. 78 */ 79 int 80 sysattr_type(char *file) 81 { 82 if (file == NULL) { 83 errno = ENOENT; 84 return (_NOT_SATTR); 85 } 86 87 if (strcmp(basename(file), file) != 0) { 88 errno = EINVAL; 89 return (_NOT_SATTR); 90 } 91 92 errno = 0; 93 if (strcmp(file, VIEW_READONLY) == 0) { 94 return (_RO_SATTR); 95 } else if (strcmp(file, VIEW_READWRITE) == 0) { 96 return (_RW_SATTR); 97 } else { 98 return (_NOT_SATTR); 99 } 100 } 101 102 /* 103 * Call sysattr_support() instead of pathconf(file, _PC_SATTR_ENABLED) or 104 * pathconf(file, _PC_SATTR_EXISTS) so that if pathconf() fails over NFS, we 105 * can still try to figure out if extended system attributes are supported by 106 * testing for a valid extended system attribute file. 107 * 108 * 'name' can have the values _PC_SATTR_ENABLED or _PC_SATTR_EXISTS. 109 * 110 * Returns 1 if the underlying file system supports extended system attributes, 111 * otherwise, returns -1. 112 */ 113 int 114 sysattr_support(char *file, int name) 115 { 116 int rc; 117 118 errno = 0; 119 if ((name != _PC_SATTR_ENABLED) && 120 (name != _PC_SATTR_EXISTS)) { 121 errno = EINVAL; 122 return (-1); 123 } 124 if (((rc = pathconf(file, name)) == 1) || (errno != EINVAL)) { 125 return (rc); 126 } 127 return (sysattr_status(file, XATTR_VIEW_READONLY)); 128 } 129