| Current Path : /usr/src/sbin/swapon/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sbin/swapon/swapon.c |
/*
* 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.
* 4. 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: release/9.1.0/sbin/swapon/swapon.c 179966 2008-06-23 22:17:08Z mtm $");
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <vm/vm_param.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <libutil.h>
static void usage(void);
static int swap_on_off(char *name, int ignoreebusy);
static void swaplist(int, int, int);
enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;
int
main(int argc, char **argv)
{
struct fstab *fsp;
char *ptr;
int stat;
int ch, doall;
int sflag = 0, lflag = 0, hflag = 0, qflag = 0;
if ((ptr = strrchr(argv[0], '/')) == NULL)
ptr = argv[0];
if (strstr(ptr, "swapon"))
which_prog = SWAPON;
else if (strstr(ptr, "swapoff"))
which_prog = SWAPOFF;
orig_prog = which_prog;
doall = 0;
while ((ch = getopt(argc, argv, "AadghklmqsU")) != -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 '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 '?':
default:
usage();
}
}
argv += optind;
stat = 0;
if (which_prog == SWAPON || which_prog == SWAPOFF) {
if (doall) {
while ((fsp = getfsent()) != NULL) {
if (strcmp(fsp->fs_type, FSTAB_SW))
continue;
if (strstr(fsp->fs_mntops, "noauto"))
continue;
if (swap_on_off(fsp->fs_spec, 1)) {
stat = 1;
} else {
if (!qflag) {
printf("%s: %sing %s as swap device\n",
getprogname(),
which_prog == SWAPOFF ? "remov" : "add",
fsp->fs_spec);
}
}
}
}
else if (!*argv)
usage();
for (; *argv; ++argv) {
if (swap_on_off(*argv, 0)) {
stat = 1;
} else if (orig_prog == SWAPCTL) {
printf("%s: %sing %s as swap device\n",
getprogname(), which_prog == SWAPOFF ? "remov" : "add",
*argv);
}
}
} else {
if (lflag || sflag)
swaplist(lflag, sflag, hflag);
else
usage();
}
exit(stat);
}
static int
swap_on_off(char *name, int doingall)
{
if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) {
switch (errno) {
case EBUSY:
if (!doingall)
warnx("%s: device already in use", name);
break;
case EINVAL:
if (which_prog == SWAPON)
warnx("%s: NSWAPDEV limit reached", name);
else if (!doingall)
warn("%s", name);
break;
default:
warn("%s", name);
break;
}
return(1);
}
return(0);
}
static void
usage(void)
{
fprintf(stderr, "usage: %s ", getprogname());
switch(orig_prog) {
case SWAPON:
case SWAPOFF:
fprintf(stderr, "-aq | 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)
{
if (hflag == 'H') {
char tmp[16];
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 = sizeof mib / sizeof mib[0];
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);
}
}