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 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 /*
30 * attropen -- C library extension routine
31 */
32
33 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64
34 #pragma weak _attropen64 = attropen64
35 #else
36 #pragma weak _attropen = attropen
37 #endif
38
39 #include "lint.h"
40 #include <sys/types.h>
41 #include <sys/stat.h>
42 #include <fcntl.h>
43 #include <stdlib.h>
44 #include <errno.h>
45 #include <unistd.h>
46 #include <stdarg.h>
47
48 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64
49
50 int
attropen64(const char * file,const char * attr,int oflag,...)51 attropen64(const char *file, const char *attr, int oflag, ...)
52 {
53 int fd;
54 int attrfd;
55 int saverrno;
56 va_list ap;
57
58 va_start(ap, oflag);
59
60 if ((fd = open64(file, O_RDONLY|O_NONBLOCK)) == -1) {
61 va_end(ap);
62 return (-1);
63 }
64
65 if ((attrfd = openat64(fd, attr, oflag | O_XATTR,
66 va_arg(ap, mode_t))) == -1) {
67 saverrno = errno;
68 (void) close(fd);
69 errno = saverrno;
70 va_end(ap);
71 return (-1);
72 }
73
74 (void) close(fd);
75 va_end(ap);
76 return (attrfd);
77 }
78
79 #else
80
81 int
attropen(const char * file,const char * attr,int oflag,...)82 attropen(const char *file, const char *attr, int oflag, ...)
83 {
84 int fd;
85 int attrfd;
86 int saverrno;
87 va_list ap;
88
89 va_start(ap, oflag);
90
91 if ((fd = open(file, O_RDONLY|O_NONBLOCK)) == -1) {
92 va_end(ap);
93 return (-1);
94 }
95
96 if ((attrfd = openat(fd, attr, oflag | O_XATTR,
97 va_arg(ap, mode_t))) == -1) {
98 saverrno = errno;
99 (void) close(fd);
100 errno = saverrno;
101 va_end(ap);
102 return (-1);
103 }
104
105 (void) close(fd);
106 va_end(ap);
107 return (attrfd);
108 }
109
110 #endif /* _FILE_OFFSET_BITS == 64 */
111