1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11 
  12 /*
  13  * Copyright 2012 Jilin Xpd <jilinxpd@gmail.com>
  14  * Copyright 2018 Nexenta Systems, Inc.
  15  */
  16 
  17 /*
  18  * It doesn't matter if the userland forgets to close the file or
  19  * munmap it, because smbfs will help close it(including otW close)
  20  * and sync the dirty pages to the file.
  21  * This program tests if smbfs works as we said.
  22  */
  23 
  24 #include <sys/mman.h>
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <string.h>
  32 #include <errno.h>
  33 
  34 int
  35 main(int argc, char **argv)
  36 {
  37         char *file_addr;
  38         off_t offset;
  39         size_t filesize;
  40         size_t blksize;
  41         int fid;
  42         int i;
  43         char *c = "?#*%&";
  44 
  45         if (argc != 2) {
  46                 fprintf(stderr, "\tusage:\n\tno_close <filename>\n");
  47                 return (1);
  48         }
  49 
  50         /* open test file */
  51         fid = open(argv[1], O_RDWR | O_CREAT | O_TRUNC,
  52             S_IRUSR | S_IWUSR | S_IROTH | S_IWOTH);
  53         if (fid == -1) {
  54                 fprintf(stderr, "open %s error=%d\n", argv[1], errno);
  55                 return (1);
  56         }
  57 
  58         /* extend file */
  59         filesize = 64 * 1024;
  60         if (ftruncate(fid, filesize) == -1) {
  61                 fprintf(stderr, "ftrunc %s error=%d\n", argv[1], errno);
  62                 return (1);
  63         }
  64 
  65         /* map file */
  66         file_addr = mmap(NULL, filesize,
  67             PROT_READ | PROT_WRITE, MAP_SHARED, fid, 0);
  68         if (file_addr == MAP_FAILED) {
  69                 fprintf(stderr, "mmap %s error=%d\n", argv[1], errno);
  70                 return (1);
  71         }
  72 
  73         /* write something into mapped addr */
  74         blksize = filesize / 4;
  75         for (i = 0, offset = 0; i < 4; i++, offset += blksize) {
  76                 memset(file_addr + offset, c[i], blksize);
  77         }
  78         memset(file_addr + offset, c[i], filesize - offset);
  79 
  80         /* no msync, munmap, close */
  81 
  82         _exit(0);
  83         /* NOTREACHED */
  84 }