2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018 Eugene Grosbein <eugen@FreeBSD.org>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/ioctl.h>
46 static const char rcsid[] =
50 static int trim(char *path, off_t offset, off_t length, int dryrun, int verbose);
51 static off_t getsize(char *path);
52 static void usage(char *name) __dead2;
55 main(int argc, char **argv)
59 int ch, dryrun, error, verbose;
67 while ((ch = getopt(argc, argv, "Nfl:o:qr:v")) != -1)
78 if (expand_number(optarg, &usz) == -1 ||
80 (usz == 0 && ch == 'l'))
82 "invalid %s of the region: `%s'",
83 ch == 'o' ? "offset" : "length",
94 if ((length = getsize(optarg)) == 0)
96 "invalid zero length reference file"
97 " for the region: `%s'", optarg);
113 while ((fname = *argv++) != NULL)
114 if (trim(fname, offset, length, dryrun, verbose) < 0)
117 return (error ? EXIT_FAILURE : EXIT_SUCCESS);
128 if ((fd = open(path, O_RDONLY | O_DIRECT)) < 0) {
129 if (errno == ENOENT && path[0] != '/') {
130 if (asprintf(&tstr, "%s%s", _PATH_DEV, path) < 0)
131 errx(EX_OSERR, "no memory");
132 fd = open(tstr, O_RDONLY | O_DIRECT);
138 err(EX_NOINPUT, "`%s'", path);
140 if (fstat(fd, &sb) < 0)
141 err(EX_IOERR, "`%s'", path);
143 if (S_ISREG(sb.st_mode) || S_ISDIR(sb.st_mode)) {
148 if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
150 "invalid type of the file "
151 "(not regular, directory nor special device): `%s'",
154 if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) < 0)
156 "ioctl(DIOCGMEDIASIZE) failed, probably not a disk: "
164 trim(char *path, off_t offset, off_t length, int dryrun, int verbose)
171 length = getsize(path);
174 printf("trim `%s' offset %ju length %ju\n",
175 path, (uintmax_t)offset, (uintmax_t)length);
178 printf("dry run: add -f to actually perform the operation\n");
182 if ((fd = open(path, O_WRONLY | O_DIRECT)) < 0) {
183 if (errno == ENOENT && path[0] != '/') {
184 if (asprintf(&tstr, "%s%s", _PATH_DEV, path) < 0)
185 errx(EX_OSERR, "no memory");
186 fd = open(tstr, O_WRONLY | O_DIRECT);
192 err(EX_NOINPUT, "`%s'", path);
197 error = ioctl(fd, DIOCGDELETE, arg);
199 warn("ioctl(DIOCGDELETE) failed for `%s'", path);
208 (void)fprintf(stderr,
209 "usage: %s [-[lo] offset[K|k|M|m|G|g|T|t]] [-r rfile] [-Nfqv] device ...\n",