/************************************************************************
*                                                                       *    
*  Copyright Digital Equipment Corporation 1998. All rights reserved.   *
*                                                                       *    
*  Restricted Rights: Use, duplication, or disclosure by the U.S.       *    
*  Government is subject to restrictions as set forth in subparagraph   *    
*  (c) (1) (ii) of DFARS 252.227-7013, or in FAR 52.227-19, or in FAR   *    
*  52.227-14 Alt. III, as applicable.                                   *    
*                                                                       *    
*  This software is proprietary to and embodies the confidential        *    
*  technology of Digital Equipment Corporation. Possession, use, or     *    
*  copying of this software and media is authorized only pursuant to a  *    
*  valid written license from Digital or an authorized sublicensor.     *    
*                                                                       *    
************************************************************************/

/*      read_example.c  */

#include <file.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>

main()
{
    int fd,
        i;
    char buf[10];
    FILE *fp ;          /* Temporary STDIO file */

    /* Create a dummy data file  */

    if ((fp = fopen("test.txt", "w+")) == NULL) {
        perror("open");
        exit(1);
    }
    fputs("XYZ\n",fp) ;
    fclose(fp) ;

    /* And now practice "read" */

    if ((fd = open("test.txt", O_RDWR, 0, "shr=upd")) <= 0) {
        perror("open");
        exit(0);
    }

    /* Read 2 characters into buf.  */

    if ((i = read(fd, buf, 2)) < 0) {
        perror("read");
        exit(0);
    }

    /* Print out what was read.  */

    if (i > 0)
        printf("buf='%c%c'\n", buf[0], buf[1]);

    close(fd);
}