truncate_test.c

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    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 (c) 2012, 2014 by Delphix. All rights reserved.
   14  * Copyright 2017, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
   15  */
   16 
   17 #include <fcntl.h>
   18 #include <sys/stat.h>
   19 #include <sys/types.h>
   20 #include <unistd.h>
   21 #include <errno.h>
   22 #include <stdio.h>
   23 #include <stdlib.h>
   24 
   25 #define FSIZE   256*1024*1024
   26 
   27 static long     fsize = FSIZE;
   28 static int      errflag = 0;
   29 static char     *filename = NULL;
   30 static int      ftruncflag = 0;
   31 
   32 static void parse_options(int argc, char *argv[]);
   33 
   34 static void
   35 usage(char *execname)
   36 {
   37         (void) fprintf(stderr,
   38             "usage: %s [-s filesize] [-f] /path/to/file\n", execname);
   39         (void) exit(1);
   40 }
   41 
   42 int
   43 main(int argc, char *argv[])
   44 {
   45         int fd;
   46 
   47         parse_options(argc, argv);
   48 
   49         if (ftruncflag) {
   50                 fd = open(filename, O_RDWR|O_CREAT, 0666);
   51                 if (fd < 0) {
   52                         perror("open");
   53                         return (1);
   54                 }
   55                 if (ftruncate(fd, fsize) < 0) {
   56                         perror("ftruncate");
   57                         return (1);
   58                 }
   59                 if (close(fd)) {
   60                         perror("close");
   61                         return (1);
   62                 }
   63         } else {
   64                 if (truncate(filename, fsize) < 0) {
   65                         perror("truncate");
   66                         return (1);
   67                 }
   68         }
   69         return (0);
   70 }
   71 
   72 static void
   73 parse_options(int argc, char *argv[])
   74 {
   75         int c;
   76         extern char *optarg;
   77         extern int optind, optopt;
   78 
   79         while ((c = getopt(argc, argv, "s:f")) != -1) {
   80                 switch (c) {
   81                         case 's':
   82                                 fsize = atoi(optarg);
   83                                 break;
   84                         case 'f':
   85                                 ftruncflag++;
   86                                 break;
   87                         case ':':
   88                                 (void) fprintf(stderr,
   89                                     "Option -%c requires an operand\n", optopt);
   90                                 errflag++;
   91                                 break;
   92                 }
   93                 if (errflag) {
   94                         (void) usage(argv[0]);
   95                 }
   96         }
   97 
   98         if (argc <= optind) {
   99                 (void) fprintf(stderr, "No filename specified\n");
  100                 usage(argv[0]);
  101         }
  102         filename = argv[optind];
  103 }

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/tests/zfs-tests/cmd/truncate_test.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/tests/zfs-tests/cmd/truncate_test.c