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freebsd-dev/sbin/swapon/swapon.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

871 lines
20 KiB
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Raw Blame History

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mdioctl.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <vm/vm_param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <fstab.h>
#include <libgen.h>
#include <libutil.h>
#include <limits.h>
#include <paths.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void usage(void);
static const char *swap_on_off(const char *, int, char *);
static const char *swap_on_off_gbde(const char *, int);
static const char *swap_on_off_geli(const char *, char *, int);
static const char *swap_on_off_md(const char *, char *, int);
static const char *swap_on_off_sfile(const char *, int);
static void swaplist(int, int, int);
static int run_cmd(int *, const char *, ...) __printflike(2, 3);
static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;
static int qflag;
int
main(int argc, char **argv)
{
struct fstab *fsp;
const char *swfile;
char *ptr;
int ret, ch, doall;
int sflag, lflag, late, hflag;
const char *etc_fstab;
sflag = lflag = late = hflag = 0;
if ((ptr = strrchr(argv[0], '/')) == NULL)
ptr = argv[0];
if (strstr(ptr, "swapon") != NULL)
which_prog = SWAPON;
else if (strstr(ptr, "swapoff") != NULL)
which_prog = SWAPOFF;
orig_prog = which_prog;
doall = 0;
etc_fstab = NULL;
while ((ch = getopt(argc, argv, "AadghklLmqsUF:")) != -1) {
switch(ch) {
case 'A':
if (which_prog == SWAPCTL) {
doall = 1;
which_prog = SWAPON;
} else
usage();
break;
case 'a':
if (which_prog == SWAPON || which_prog == SWAPOFF)
doall = 1;
else
which_prog = SWAPON;
break;
case 'd':
if (which_prog == SWAPCTL)
which_prog = SWAPOFF;
else
usage();
break;
case 'g':
hflag = 'G';
break;
case 'h':
hflag = 'H';
break;
case 'k':
hflag = 'K';
break;
case 'l':
lflag = 1;
break;
case 'L':
late = 1;
break;
case 'm':
hflag = 'M';
break;
case 'q':
if (which_prog == SWAPON || which_prog == SWAPOFF)
qflag = 1;
break;
case 's':
sflag = 1;
break;
case 'U':
if (which_prog == SWAPCTL) {
doall = 1;
which_prog = SWAPOFF;
} else
usage();
break;
case 'F':
etc_fstab = optarg;
break;
case '?':
default:
usage();
}
}
argv += optind;
ret = 0;
swfile = NULL;
if (etc_fstab != NULL)
setfstab(etc_fstab);
if (which_prog == SWAPON || which_prog == SWAPOFF) {
if (doall) {
while ((fsp = getfsent()) != NULL) {
if (strcmp(fsp->fs_type, FSTAB_SW) != 0)
continue;
if (strstr(fsp->fs_mntops, "noauto") != NULL)
continue;
if (which_prog != SWAPOFF &&
strstr(fsp->fs_mntops, "late") &&
late == 0)
continue;
if (which_prog == SWAPOFF &&
strstr(fsp->fs_mntops, "late") == NULL &&
late != 0)
continue;
swfile = swap_on_off(fsp->fs_spec, 1,
fsp->fs_mntops);
if (swfile == NULL) {
ret = 1;
continue;
}
if (qflag == 0) {
printf("%s: %sing %s as swap device\n",
getprogname(),
(which_prog == SWAPOFF) ?
"remov" : "add", swfile);
}
}
} else if (*argv == NULL)
usage();
for (; *argv; ++argv) {
swfile = swap_on_off(*argv, 0, NULL);
if (swfile == NULL) {
ret = 1;
continue;
}
if (orig_prog == SWAPCTL) {
printf("%s: %sing %s as swap device\n",
getprogname(),
(which_prog == SWAPOFF) ? "remov" : "add",
swfile);
}
}
} else {
if (lflag || sflag)
swaplist(lflag, sflag, hflag);
else
usage();
}
exit(ret);
}
static const char *
swap_on_off(const char *name, int doingall, char *mntops)
{
char *base, *basebuf;
/* Swap on vnode-backed md(4) device. */
if (mntops != NULL &&
(fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 ||
fnmatch(MD_NAME "[0-9]*", name, 0) == 0 ||
strncmp(_PATH_DEV MD_NAME, name,
sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 ||
strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0))
return (swap_on_off_md(name, mntops, doingall));
basebuf = strdup(name);
base = basename(basebuf);
/* Swap on encrypted device by GEOM_BDE. */
if (fnmatch("*.bde", base, 0) == 0) {
free(basebuf);
return (swap_on_off_gbde(name, doingall));
}
/* Swap on encrypted device by GEOM_ELI. */
if (fnmatch("*.eli", base, 0) == 0) {
free(basebuf);
return (swap_on_off_geli(name, mntops, doingall));
}
/* Swap on special file. */
free(basebuf);
return (swap_on_off_sfile(name, doingall));
}
/* Strip off .bde or .eli suffix from swap device name */
static char *
swap_basename(const char *name)
{
char *dname, *p;
dname = strdup(name);
p = strrchr(dname, '.');
/* assert(p != NULL); */
*p = '\0';
return (dname);
}
static const char *
swap_on_off_gbde(const char *name, int doingall)
{
const char *ret;
char pass[64 * 2 + 1];
unsigned char bpass[64];
char *dname;
int i, error;
dname = swap_basename(name);
if (dname == NULL)
return (NULL);
if (which_prog == SWAPON) {
arc4random_buf(bpass, sizeof(bpass));
for (i = 0; i < (int)sizeof(bpass); i++)
sprintf(&pass[2 * i], "%02x", bpass[i]);
pass[sizeof(pass) - 1] = '\0';
error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE,
dname, pass);
if (error) {
/* bde device found. Ignore it. */
free(dname);
if (qflag == 0)
warnx("%s: Device already in use", name);
return (NULL);
}
error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE,
dname, pass);
free(dname);
if (error) {
warnx("gbde (attach) error: %s", name);
return (NULL);
}
}
ret = swap_on_off_sfile(name, doingall);
if (which_prog == SWAPOFF) {
error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname);
free(dname);
if (error) {
/* bde device not found. Ignore it. */
if (qflag == 0)
warnx("%s: Device not found", name);
return (NULL);
}
}
return (ret);
}
/* Build geli(8) arguments from mntops */
static char *
swap_on_geli_args(const char *mntops)
{
const char *aalgo, *ealgo, *keylen_str, *sectorsize_str;
const char *aflag, *eflag, *lflag, *Tflag, *sflag;
char *p, *args, *token, *string, *ops;
int pagesize;
size_t pagesize_len;
u_long ul;
/* Use built-in defaults for geli(8). */
aalgo = ealgo = keylen_str = "";
aflag = eflag = lflag = Tflag = "";
/* We will always specify sectorsize. */
sflag = " -s ";
sectorsize_str = NULL;
if (mntops != NULL) {
string = ops = strdup(mntops);
while ((token = strsep(&string, ",")) != NULL) {
if ((p = strstr(token, "aalgo=")) == token) {
aalgo = p + sizeof("aalgo=") - 1;
aflag = " -a ";
} else if ((p = strstr(token, "ealgo=")) == token) {
ealgo = p + sizeof("ealgo=") - 1;
eflag = " -e ";
} else if ((p = strstr(token, "keylen=")) == token) {
keylen_str = p + sizeof("keylen=") - 1;
errno = 0;
ul = strtoul(keylen_str, &p, 10);
if (errno == 0) {
if (*p != '\0' || ul > INT_MAX)
errno = EINVAL;
}
if (errno) {
warn("Invalid keylen: %s", keylen_str);
free(ops);
return (NULL);
}
lflag = " -l ";
} else if ((p = strstr(token, "sectorsize=")) == token) {
sectorsize_str = p + sizeof("sectorsize=") - 1;
errno = 0;
ul = strtoul(sectorsize_str, &p, 10);
if (errno == 0) {
if (*p != '\0' || ul > INT_MAX)
errno = EINVAL;
}
if (errno) {
warn("Invalid sectorsize: %s",
sectorsize_str);
free(ops);
return (NULL);
}
} else if (strcmp(token, "notrim") == 0) {
Tflag = " -T ";
} else if (strcmp(token, "late") == 0) {
/* ignore known option */
} else if (strcmp(token, "noauto") == 0) {
/* ignore known option */
} else if (strcmp(token, "sw") != 0) {
warnx("Invalid option: %s", token);
free(ops);
return (NULL);
}
}
} else
ops = NULL;
/*
* If we do not have a sector size at this point, fill in
* pagesize as sector size.
*/
if (sectorsize_str == NULL) {
/* Use pagesize as default sectorsize. */
pagesize = getpagesize();
pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1;
p = alloca(pagesize_len);
snprintf(p, pagesize_len, "%d", pagesize);
sectorsize_str = p;
}
(void)asprintf(&args, "%s%s%s%s%s%s%s%s%s -d",
aflag, aalgo, eflag, ealgo, lflag, keylen_str, Tflag,
sflag, sectorsize_str);
free(ops);
return (args);
}
static const char *
swap_on_off_geli(const char *name, char *mntops, int doingall)
{
struct stat sb;
char *dname, *args;
int error;
error = stat(name, &sb);
if (which_prog == SWAPON) do {
/* Skip if the .eli device already exists. */
if (error == 0)
break;
args = swap_on_geli_args(mntops);
if (args == NULL)
return (NULL);
dname = swap_basename(name);
if (dname == NULL) {
free(args);
return (NULL);
}
error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args,
dname);
free(dname);
free(args);
if (error) {
/* error occurred during creation. */
if (qflag == 0)
warnx("%s: Invalid parameters", name);
return (NULL);
}
} while (0);
return (swap_on_off_sfile(name, doingall));
}
static const char *
swap_on_off_md(const char *name, char *mntops, int doingall)
{
FILE *sfd;
int fd, mdunit, error;
const char *ret;
static char mdpath[PATH_MAX], linebuf[PATH_MAX];
char *p, *vnodefile;
size_t linelen;
u_long ul;
fd = -1;
sfd = NULL;
if (strlen(name) == (sizeof(MD_NAME) - 1))
mdunit = -1;
else {
errno = 0;
ul = strtoul(name + 2, &p, 10);
if (errno == 0) {
if (*p != '\0' || ul > INT_MAX)
errno = EINVAL;
}
if (errno) {
warn("Bad device unit: %s", name);
return (NULL);
}
mdunit = (int)ul;
}
vnodefile = NULL;
if ((p = strstr(mntops, "file=")) != NULL) {
vnodefile = strdup(p + sizeof("file=") - 1);
p = strchr(vnodefile, ',');
if (p != NULL)
*p = '\0';
}
if (vnodefile == NULL) {
warnx("file option not found for %s", name);
return (NULL);
}
if (which_prog == SWAPON) {
if (mdunit == -1) {
error = run_cmd(&fd, "%s -l -n -f %s",
_PATH_MDCONFIG, vnodefile);
if (error == 0) {
/* md device found. Ignore it. */
close(fd);
if (!qflag)
warnx("%s: Device already in use",
vnodefile);
free(vnodefile);
return (NULL);
}
error = run_cmd(&fd, "%s -a -t vnode -n -f %s",
_PATH_MDCONFIG, vnodefile);
if (error) {
warnx("mdconfig (attach) error: file=%s",
vnodefile);
free(vnodefile);
return (NULL);
}
sfd = fdopen(fd, "r");
if (sfd == NULL) {
warn("mdconfig (attach) fdopen error");
ret = NULL;
goto err;
}
p = fgetln(sfd, &linelen);
if (p == NULL &&
(linelen < 2 || linelen > sizeof(linebuf))) {
warn("mdconfig (attach) unexpected output");
ret = NULL;
goto err;
}
strncpy(linebuf, p, linelen);
linebuf[linelen - 1] = '\0';
errno = 0;
ul = strtoul(linebuf, &p, 10);
if (errno == 0) {
if (*p != '\0' || ul > INT_MAX)
errno = EINVAL;
}
if (errno) {
warn("mdconfig (attach) unexpected output: %s",
linebuf);
ret = NULL;
goto err;
}
mdunit = (int)ul;
} else {
error = run_cmd(&fd, "%s -l -n -f %s -u %d",
_PATH_MDCONFIG, vnodefile, mdunit);
if (error == 0) {
/* md device found. Ignore it. */
close(fd);
if (qflag == 0)
warnx("md%d on %s: Device already "
"in use", mdunit, vnodefile);
free(vnodefile);
return (NULL);
}
error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s",
_PATH_MDCONFIG, mdunit, vnodefile);
if (error) {
warnx("mdconfig (attach) error: "
"md%d on file=%s", mdunit, vnodefile);
free(vnodefile);
return (NULL);
}
}
} else /* SWAPOFF */ {
if (mdunit == -1) {
error = run_cmd(&fd, "%s -l -n -f %s",
_PATH_MDCONFIG, vnodefile);
if (error) {
/* md device not found. Ignore it. */
close(fd);
if (!qflag)
warnx("md on %s: Device not found",
vnodefile);
free(vnodefile);
return (NULL);
}
sfd = fdopen(fd, "r");
if (sfd == NULL) {
warn("mdconfig (list) fdopen error");
ret = NULL;
goto err;
}
p = fgetln(sfd, &linelen);
if (p == NULL &&
(linelen < 2 || linelen > sizeof(linebuf) - 1)) {
warn("mdconfig (list) unexpected output");
ret = NULL;
goto err;
}
strncpy(linebuf, p, linelen);
linebuf[linelen - 1] = '\0';
p = strchr(linebuf, ' ');
if (p != NULL)
*p = '\0';
errno = 0;
ul = strtoul(linebuf, &p, 10);
if (errno == 0) {
if (*p != '\0' || ul > INT_MAX)
errno = EINVAL;
}
if (errno) {
warn("mdconfig (list) unexpected output: %s",
linebuf);
ret = NULL;
goto err;
}
mdunit = (int)ul;
} else {
error = run_cmd(&fd, "%s -l -n -f %s -u %d",
_PATH_MDCONFIG, vnodefile, mdunit);
if (error) {
/* md device not found. Ignore it. */
close(fd);
if (!qflag)
warnx("md%d on %s: Device not found",
mdunit, vnodefile);
free(vnodefile);
return (NULL);
}
}
}
snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV,
MD_NAME, mdunit);
mdpath[sizeof(mdpath) - 1] = '\0';
ret = swap_on_off_sfile(mdpath, doingall);
if (which_prog == SWAPOFF) {
if (ret != NULL) {
error = run_cmd(NULL, "%s -d -u %d",
_PATH_MDCONFIG, mdunit);
if (error)
warn("mdconfig (detach) detach failed: %s%s%d",
_PATH_DEV, MD_NAME, mdunit);
}
}
err:
if (sfd != NULL)
fclose(sfd);
if (fd != -1)
close(fd);
free(vnodefile);
return (ret);
}
static int
run_cmd(int *ofd, const char *cmdline, ...)
{
va_list ap;
char **argv, **argvp, *cmd, *p;
int argc, pid, status, rv;
int pfd[2], nfd, dup2dn;
va_start(ap, cmdline);
rv = vasprintf(&cmd, cmdline, ap);
if (rv == -1) {
warn("%s", __func__);
va_end(ap);
return (rv);
}
va_end(ap);
for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++)
argc++;
argv = (char **)malloc(sizeof(*argv) * (argc + 1));
for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;)
if (**argvp != '\0' && (++argvp > &argv[argc])) {
*argvp = NULL;
break;
}
/* The argv array ends up NULL-terminated here. */
#if 0
{
int i;
fprintf(stderr, "DEBUG: running:");
/* Should be equivalent to 'cmd' (before strsep, of course). */
for (i = 0; argv[i] != NULL; i++)
fprintf(stderr, " %s", argv[i]);
fprintf(stderr, "\n");
}
#endif
dup2dn = 1;
if (ofd != NULL) {
if (pipe(&pfd[0]) == -1) {
warn("%s: pipe", __func__);
return (-1);
}
*ofd = pfd[0];
dup2dn = 0;
}
pid = fork();
switch (pid) {
case 0:
/* Child process. */
if (ofd != NULL)
if (dup2(pfd[1], STDOUT_FILENO) < 0)
err(1, "dup2 in %s", __func__);
nfd = open(_PATH_DEVNULL, O_RDWR);
if (nfd == -1)
err(1, "%s: open %s", __func__, _PATH_DEVNULL);
if (dup2(nfd, STDIN_FILENO) < 0)
err(1, "%s: dup2", __func__);
if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0)
err(1, "%s: dup2", __func__);
if (dup2(nfd, STDERR_FILENO) < 0)
err(1, "%s: dup2", __func__);
execv(argv[0], argv);
warn("exec: %s", argv[0]);
_exit(-1);
case -1:
err(1, "%s: fork", __func__);
}
free(cmd);
free(argv);
while (waitpid(pid, &status, 0) != pid)
;
return (WEXITSTATUS(status));
}
static const char *
swap_on_off_sfile(const char *name, int doingall)
{
int error;
if (which_prog == SWAPON)
error = swapon(name);
else /* SWAPOFF */
error = swapoff(name);
if (error == -1) {
switch (errno) {
case EBUSY:
if (doingall == 0)
warnx("%s: Device already in use", name);
break;
case EINVAL:
if (which_prog == SWAPON)
warnx("%s: NSWAPDEV limit reached", name);
else if (doingall == 0)
warn("%s", name);
break;
default:
warn("%s", name);
break;
}
return (NULL);
}
return (name);
}
static void
usage(void)
{
fprintf(stderr, "usage: %s ", getprogname());
switch(orig_prog) {
case SWAPON:
case SWAPOFF:
fprintf(stderr, "[-F fstab] -aLq | file ...\n");
break;
case SWAPCTL:
fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n");
break;
}
exit(1);
}
static void
sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen,
long blocksize)
{
char tmp[16];
if (hflag == 'H') {
humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE,
HN_B | HN_NOSPACE | HN_DECIMAL);
snprintf(buf, bufsize, "%*s", hlen, tmp);
} else
snprintf(buf, bufsize, "%*lld", hlen, val / blocksize);
}
static void
swaplist(int lflag, int sflag, int hflag)
{
size_t mibsize, size;
struct xswdev xsw;
int hlen, mib[16], n, pagesize;
long blocksize;
long long total = 0;
long long used = 0;
long long tmp_total;
long long tmp_used;
char buf[32];
pagesize = getpagesize();
switch(hflag) {
case 'G':
blocksize = 1024 * 1024 * 1024;
strlcpy(buf, "1GB-blocks", sizeof(buf));
hlen = 10;
break;
case 'H':
blocksize = -1;
strlcpy(buf, "Bytes", sizeof(buf));
hlen = 10;
break;
case 'K':
blocksize = 1024;
strlcpy(buf, "1kB-blocks", sizeof(buf));
hlen = 10;
break;
case 'M':
blocksize = 1024 * 1024;
strlcpy(buf, "1MB-blocks", sizeof(buf));
hlen = 10;
break;
default:
getbsize(&hlen, &blocksize);
snprintf(buf, sizeof(buf), "%ld-blocks", blocksize);
break;
}
mibsize = nitems(mib);
if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
err(1, "sysctlnametomib()");
if (lflag) {
printf("%-13s %*s %*s\n",
"Device:",
hlen, buf,
hlen, "Used:");
}
for (n = 0; ; ++n) {
mib[mibsize] = n;
size = sizeof xsw;
if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
break;
if (xsw.xsw_version != XSWDEV_VERSION)
errx(1, "xswdev version mismatch");
tmp_total = (long long)xsw.xsw_nblks * pagesize;
tmp_used = (long long)xsw.xsw_used * pagesize;
total += tmp_total;
used += tmp_used;
if (lflag) {
sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen,
blocksize);
printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR),
buf);
sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen,
blocksize);
printf("%s\n", buf);
}
}
if (errno != ENOENT)
err(1, "sysctl()");
if (sflag) {
sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize);
printf("Total: %s ", buf);
sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize);
printf("%s\n", buf);
}
}
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