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Initial check-in based on OpenGL Performer 2.4 tree.
-flynnt

/*
 * Copyright 2000, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 *
 * This source code ("Source Code") was originally derived from a
 * code base owned by Silicon Graphics, Inc. ("SGI")
 * 
 * LICENSE: SGI grants the user ("Licensee") permission to reproduce,
 * distribute, and create derivative works from this Source Code,
 * provided that: (1) the user reproduces this entire notice within
 * both source and binary format redistributions and any accompanying
 * materials such as documentation in printed or electronic format;
 * (2) the Source Code is not to be used, or ported or modified for
 * use, except in conjunction with OpenGL Performer; and (3) the
 * names of Silicon Graphics, Inc.  and SGI may not be used in any
 * advertising or publicity relating to the Source Code without the
 * prior written permission of SGI.  No further license or permission
 * may be inferred or deemed or construed to exist with regard to the
 * Source Code or the code base of which it forms a part. All rights
 * not expressly granted are reserved.
 * 
 * This Source Code is provided to Licensee AS IS, without any
 * warranty of any kind, either express, implied, or statutory,
 * including, but not limited to, any warranty that the Source Code
 * will conform to specifications, any implied warranties of
 * merchantability, fitness for a particular purpose, and freedom
 * from infringement, and any warranty that the documentation will
 * conform to the program, or any warranty that the Source Code will
 * be error free.
 * 
 * IN NO EVENT WILL SGI BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT
 * LIMITED TO DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES,
 * ARISING OUT OF, RESULTING FROM, OR IN ANY WAY CONNECTED WITH THE
 * SOURCE CODE, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT, TORT OR
 * OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM,
 * OR AROSE OUT OF USE OR RESULTS FROM USE OF, OR LACK OF ABILITY TO
 * USE, THE SOURCE CODE.
 * 
 * Contact information:  Silicon Graphics, Inc., 
 * 1600 Amphitheatre Pkwy, Mountain View, CA  94043, 
 * or:  http://www.sgi.com
 */

/*
 * dioinfo.C
 *
 * Program to determine the direct i/o parameters
 * of files or directories.
 */
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>

main(int argc, char **argv)
{
    if (argc < 2)
    {
	fprintf(stderr, "Usage: %s file_or_dirname [file_or_dirname ...]\n",
		argv[0]);
	return 1;
    }
    int num_errors = 0;
    while (*++argv)
    {
	int fd = open(*argv, O_RDONLY|O_DIRECT);
	if (fd == -1)
	{
	    perror(*argv);
	    num_errors++;
	    continue;
	}

	struct dioattr dioattrbuf;

	if (fcntl(fd, F_DIOINFO, &dioattrbuf) == -1)
	{
	    perror("fcntl(F_DIOINFO)");
	    num_errors++;
	    continue;
	}

	printf("%s:\n", *argv);
	printf("    d_mem = %u (required memory alignment)\n", dioattrbuf.d_mem);
	printf("    d_miniosz = %u\n", dioattrbuf.d_miniosz);
	printf("    d_maxiosz = %u\n", dioattrbuf.d_maxiosz);

	(void)close(fd);
    }

    return num_errors;
}