/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * Copyright 2012 Jilin Xpd <jilinxpd@gmail.com>
 * Copyright 2018 Nexenta Systems, Inc.
 */

/*
 * It doesn't matter if the userland forgets to close the file or
 * munmap it, because smbfs will help close it(including otW close)
 * and sync the dirty pages to the file.
 * This program tests if smbfs works as we said.
 */

#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

int
main(int argc, char **argv)
{
        char *file_addr;
        off_t offset;
        size_t filesize;
        size_t blksize;
        int fid;
        int i;
        char *c = "?#*%&";

        if (argc != 2) {
                fprintf(stderr, "\tusage:\n\tno_close <filename>\n");
                return (1);
        }

        /* open test file */
        fid = open(argv[1], O_RDWR | O_CREAT | O_TRUNC,
            S_IRUSR | S_IWUSR | S_IROTH | S_IWOTH);
        if (fid == -1) {
                fprintf(stderr, "open %s error=%d\n", argv[1], errno);
                return (1);
        }

        /* extend file */
        filesize = 64 * 1024;
        if (ftruncate(fid, filesize) == -1) {
                fprintf(stderr, "ftrunc %s error=%d\n", argv[1], errno);
                return (1);
        }

        /* map file */
        file_addr = mmap(NULL, filesize,
            PROT_READ | PROT_WRITE, MAP_SHARED, fid, 0);
        if (file_addr == MAP_FAILED) {
                fprintf(stderr, "mmap %s error=%d\n", argv[1], errno);
                return (1);
        }

        /* write something into mapped addr */
        blksize = filesize / 4;
        for (i = 0, offset = 0; i < 4; i++, offset += blksize) {
                memset(file_addr + offset, c[i], blksize);
        }
        memset(file_addr + offset, c[i], filesize - offset);

        /* no msync, munmap, close */

        _exit(0);
        /* NOTREACHED */
}