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trim(8): serveral style fixes

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Submitted by:		imp
MFC after:		1 month
Differential Revision:	https://reviews.freebsd.org/D18380
This commit is contained in:
eugen 2018-11-30 21:57:02 +00:00
parent f5d5aead70
commit b78257ce60
2 changed files with 51 additions and 52 deletions
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7
usr.sbin/trim/trim.8
View File

@ -50,8 +50,8 @@
The
.Nm
utility erases specified region of the device.
It is only relevant for flash based storage devices that use wear-leveling
algorithms.
It is mostly relevant for storage that implement trim (like flash based,
or thinly provisioned storage).
.Sy All erased data is lost.
.Pp
The following options are available:
@ -153,12 +153,13 @@ is special device file not supporting DIOCGMEDIASIZE
.Xr ada 4 ,
.Xr da 4 ,
.Xr ioctl 2 ,
.Xr nda 4 ,
.Xr sysexits 3
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 12.0 .
.Fx 12.1 .
.Sh AUTHORS
The
.Nm

96
usr.sbin/trim/trim.c
View File

@ -37,49 +37,49 @@
#include <libutil.h>
#include <limits.h>
#include <paths.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <unistd.h>
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
static int trim(char *path, off_t offset, off_t length, int dryrun, int verbose);
static off_t getsize(char *path);
static void usage(char *name) __dead2;
static off_t getsize(const char *path);
static int opendev(const char *path, int flags);
static int trim(const char *path, off_t offset, off_t length, bool dryrun, bool verbose);
static void usage(const char *name);
int
main(int argc, char **argv)
{
off_t offset, length;
uint64_t usz;
int ch, dryrun, error, verbose;
int ch, error;
bool dryrun, verbose;
char *fname, *name;
error = 0;
length = offset = 0;
name = argv[0];
dryrun = verbose = 1;
dryrun = verbose = true;
while ((ch = getopt(argc, argv, "Nfl:o:qr:v")) != -1)
switch (ch) {
case 'N':
dryrun = 1;
verbose = 1;
dryrun = true;
verbose = true;
break;
case 'f':
dryrun = 0;
dryrun = false;
break;
case 'l':
case 'o':
if (expand_number(optarg, &usz) == -1 ||
(off_t)usz < 0 ||
(usz == 0 && ch == 'l'))
(off_t)usz < 0 || (usz == 0 && ch == 'l'))
errx(EX_USAGE,
"invalid %s of the region: `%s'",
"invalid %s of the region: %s",
ch == 'o' ? "offset" : "length",
optarg);
if (ch == 'o')
@ -88,16 +88,16 @@ main(int argc, char **argv)
length = (off_t)usz;
break;
case 'q':
verbose = 0;
verbose = false;
break;
case 'r':
if ((length = getsize(optarg)) == 0)
errx(EX_USAGE,
"invalid zero length reference file"
" for the region: `%s'", optarg);
" for the region: %s", optarg);
break;
case 'v':
verbose = 1;
verbose = true;
break;
default:
usage(name);
@ -117,28 +117,38 @@ main(int argc, char **argv)
return (error ? EXIT_FAILURE : EXIT_SUCCESS);
}
static off_t
getsize(char *path)
static int
opendev(const char *path, int flags)
{
struct stat sb;
char *tstr;
off_t mediasize;
int fd;
char *tstr;
if ((fd = open(path, O_RDONLY | O_DIRECT)) < 0) {
if ((fd = open(path, flags)) < 0) {
if (errno == ENOENT && path[0] != '/') {
if (asprintf(&tstr, "%s%s", _PATH_DEV, path) < 0)
errx(EX_OSERR, "no memory");
fd = open(tstr, O_RDONLY | O_DIRECT);
fd = open(tstr, flags);
free(tstr);
}
}
if (fd < 0)
err(EX_NOINPUT, "`%s'", path);
err(EX_NOINPUT, "fstat failed: %s", path);
return (fd);
}
static off_t
getsize(const char *path)
{
struct stat sb;
off_t mediasize;
int fd;
fd = opendev(path, O_RDONLY | O_DIRECT);
if (fstat(fd, &sb) < 0)
err(EX_IOERR, "`%s'", path);
err(EX_IOERR, "fstat failed: %s", path);
if (S_ISREG(sb.st_mode) || S_ISDIR(sb.st_mode)) {
close(fd);
@ -148,62 +158,50 @@ getsize(char *path)
if (!S_ISCHR(sb.st_mode) && !S_ISBLK(sb.st_mode))
errx(EX_DATAERR,
"invalid type of the file "
"(not regular, directory nor special device): `%s'",
"(not regular, directory nor special device): %s",
path);
if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) < 0)
errx(EX_UNAVAILABLE,
err(EX_UNAVAILABLE,
"ioctl(DIOCGMEDIASIZE) failed, probably not a disk: "
"`%s'", path);
close(fd);
"%s", path);
close(fd);
return (mediasize);
}
static int
trim(char *path, off_t offset, off_t length, int dryrun, int verbose)
trim(const char *path, off_t offset, off_t length, bool dryrun, bool verbose)
{
off_t arg[2];
char *tstr;
int error, fd;
if (length == 0)
length = getsize(path);
if (verbose)
printf("trim `%s' offset %ju length %ju\n",
path, (uintmax_t)offset, (uintmax_t)length);
printf("trim %s offset %ju length %ju\n",
path, (uintmax_t)offset, (uintmax_t)length);
if (dryrun) {
printf("dry run: add -f to actually perform the operation\n");
return (0);
}
if ((fd = open(path, O_WRONLY | O_DIRECT)) < 0) {
if (errno == ENOENT && path[0] != '/') {
if (asprintf(&tstr, "%s%s", _PATH_DEV, path) < 0)
errx(EX_OSERR, "no memory");
fd = open(tstr, O_WRONLY | O_DIRECT);
free(tstr);
}
}
if (fd < 0)
err(EX_NOINPUT, "`%s'", path);
fd = opendev(path, O_WRONLY | O_DIRECT);
arg[0] = offset;
arg[1] = length;
error = ioctl(fd, DIOCGDELETE, arg);
if (error < 0)
warn("ioctl(DIOCGDELETE) failed for `%s'", path);
warn("ioctl(DIOCGDELETE) failed: %s", path);
close(fd);
return (error);
}
static void
usage(char *name)
usage(const char *name)
{
(void)fprintf(stderr,
"usage: %s [-[lo] offset[K|k|M|m|G|g|T|t]] [-r rfile] [-Nfqv] device ...\n",