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      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
     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
     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