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20093de25c
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #13259
104 lines
2.0 KiB
C
104 lines
2.0 KiB
C
/*
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* This file and its contents are supplied under the terms of the
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* Common Development and Distribution License ("CDDL"), version 1.0.
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* You may only use this file in accordance with the terms of version
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* 1.0 of the CDDL.
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*
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* A full copy of the text of the CDDL should have accompanied this
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* source. A copy of the CDDL is also available via the Internet at
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* http://www.illumos.org/license/CDDL.
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*/
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/*
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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* Copyright 2017, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
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*/
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define FSIZE 256*1024*1024
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static long fsize = FSIZE;
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static int errflag = 0;
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static char *filename = NULL;
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static int ftruncflag = 0;
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static void parse_options(int argc, char *argv[]);
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static void
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usage(char *execname)
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{
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(void) fprintf(stderr,
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"usage: %s [-s filesize] [-f] /path/to/file\n", execname);
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(void) exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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int fd;
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parse_options(argc, argv);
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if (ftruncflag) {
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fd = open(filename, O_RDWR|O_CREAT, 0666);
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if (fd < 0) {
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perror("open");
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return (1);
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}
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if (ftruncate(fd, fsize) < 0) {
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perror("ftruncate");
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return (1);
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}
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if (close(fd)) {
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perror("close");
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return (1);
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}
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} else {
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if (truncate(filename, fsize) < 0) {
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perror("truncate");
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return (1);
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}
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}
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return (0);
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}
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static void
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parse_options(int argc, char *argv[])
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{
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int c;
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extern char *optarg;
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extern int optind, optopt;
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while ((c = getopt(argc, argv, "s:f")) != -1) {
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switch (c) {
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case 's':
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fsize = atoi(optarg);
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break;
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case 'f':
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ftruncflag++;
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break;
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case ':':
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(void) fprintf(stderr,
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"Option -%c requires an operand\n", optopt);
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errflag++;
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break;
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}
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if (errflag) {
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(void) usage(argv[0]);
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}
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}
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if (argc <= optind) {
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(void) fprintf(stderr, "No filename specified\n");
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usage(argv[0]);
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}
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filename = argv[optind];
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}
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