2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1980, 1993\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
45 #include <sys/types.h>
46 #include <sys/mdioctl.h>
48 #include <sys/sysctl.h>
50 #include <vm/vm_param.h>
67 static void usage(void);
68 static const char *swap_on_off(const char *, int, char *);
69 static const char *swap_on_off_gbde(const char *, int);
70 static const char *swap_on_off_geli(const char *, char *, int);
71 static const char *swap_on_off_md(const char *, char *, int);
72 static const char *swap_on_off_sfile(const char *, int);
73 static void swaplist(int, int, int);
74 static int run_cmd(int *, const char *, ...) __printflike(2, 3);
76 static enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;
81 main(int argc, char **argv)
87 int sflag, lflag, late, hflag;
88 const char *etc_fstab;
90 sflag = lflag = late = hflag = 0;
91 if ((ptr = strrchr(argv[0], '/')) == NULL)
93 if (strstr(ptr, "swapon") != NULL)
95 else if (strstr(ptr, "swapoff") != NULL)
97 orig_prog = which_prog;
101 while ((ch = getopt(argc, argv, "AadghklLmqsUF:")) != -1) {
104 if (which_prog == SWAPCTL) {
111 if (which_prog == SWAPON || which_prog == SWAPOFF)
117 if (which_prog == SWAPCTL)
118 which_prog = SWAPOFF;
141 if (which_prog == SWAPON || which_prog == SWAPOFF)
148 if (which_prog == SWAPCTL) {
150 which_prog = SWAPOFF;
166 if (etc_fstab != NULL)
168 if (which_prog == SWAPON || which_prog == SWAPOFF) {
170 while ((fsp = getfsent()) != NULL) {
171 if (strcmp(fsp->fs_type, FSTAB_SW) != 0)
173 if (strstr(fsp->fs_mntops, "noauto") != NULL)
176 * Forcibly enable "late" option when file= is
177 * specified. This is because mounting file
178 * systems with rw option is typically
179 * required to make the backing store ready.
181 if (which_prog != SWAPOFF &&
182 (strstr(fsp->fs_mntops, "late") != NULL ||
183 strstr(fsp->fs_mntops, "file=") != NULL) &&
186 swfile = swap_on_off(fsp->fs_spec, 1,
188 if (swfile == NULL) {
193 printf("%s: %sing %s as swap device\n",
195 (which_prog == SWAPOFF) ?
196 "remov" : "add", swfile);
199 } else if (*argv == NULL)
201 for (; *argv; ++argv) {
202 swfile = swap_on_off(*argv, 0, NULL);
203 if (swfile == NULL) {
207 if (orig_prog == SWAPCTL) {
208 printf("%s: %sing %s as swap device\n",
210 (which_prog == SWAPOFF) ? "remov" : "add",
216 swaplist(lflag, sflag, hflag);
224 swap_on_off(const char *name, int doingall, char *mntops)
228 /* Swap on vnode-backed md(4) device. */
229 if (mntops != NULL &&
230 (fnmatch(_PATH_DEV MD_NAME "[0-9]*", name, 0) == 0 ||
231 fnmatch(MD_NAME "[0-9]*", name, 0) == 0 ||
232 strncmp(_PATH_DEV MD_NAME, name,
233 sizeof(_PATH_DEV) + sizeof(MD_NAME)) == 0 ||
234 strncmp(MD_NAME, name, sizeof(MD_NAME)) == 0))
235 return (swap_on_off_md(name, mntops, doingall));
237 basename_r(name, base);
239 /* Swap on encrypted device by GEOM_BDE. */
240 if (fnmatch("*.bde", base, 0) == 0)
241 return (swap_on_off_gbde(name, doingall));
243 /* Swap on encrypted device by GEOM_ELI. */
244 if (fnmatch("*.eli", base, 0) == 0)
245 return (swap_on_off_geli(name, mntops, doingall));
247 /* Swap on special file. */
248 return (swap_on_off_sfile(name, doingall));
251 /* Strip off .bde or .eli suffix from swap device name */
253 swap_basename(const char *name)
257 dname = strdup(name);
258 p = strrchr(dname, '.');
259 /* assert(p != NULL); */
266 swap_on_off_gbde(const char *name, int doingall)
269 char pass[64 * 2 + 1], bpass[64];
273 dname = swap_basename(name);
277 if (which_prog == SWAPON) {
278 arc4random_buf(bpass, sizeof(bpass));
279 for (i = 0; i < (int)sizeof(bpass); i++)
280 sprintf(&pass[2 * i], "%02x", bpass[i]);
281 pass[sizeof(pass) - 1] = '\0';
283 error = run_cmd(NULL, "%s init %s -P %s", _PATH_GBDE,
286 /* bde device found. Ignore it. */
289 warnx("%s: Device already in use", name);
292 error = run_cmd(NULL, "%s attach %s -p %s", _PATH_GBDE,
296 warnx("gbde (attach) error: %s", name);
301 ret = swap_on_off_sfile(name, doingall);
303 if (which_prog == SWAPOFF) {
304 error = run_cmd(NULL, "%s detach %s", _PATH_GBDE, dname);
307 /* bde device not found. Ignore it. */
309 warnx("%s: Device not found", name);
317 /* Build geli(8) arguments from mntops */
319 swap_on_geli_args(const char *mntops)
321 const char *aalgo, *ealgo, *keylen_str, *sectorsize_str;
322 const char *aflag, *eflag, *lflag, *sflag;
323 char *p, *args, *token, *string, *ops;
324 int argsize, pagesize;
328 /* Use built-in defaults for geli(8). */
329 aalgo = ealgo = keylen_str = "";
330 aflag = eflag = lflag = "";
332 /* We will always specify sectorsize. */
334 sectorsize_str = NULL;
336 if (mntops != NULL) {
337 string = ops = strdup(mntops);
339 while ((token = strsep(&string, ",")) != NULL) {
340 if ((p = strstr(token, "aalgo=")) == token) {
341 aalgo = p + sizeof("aalgo=") - 1;
343 } else if ((p = strstr(token, "ealgo=")) == token) {
344 ealgo = p + sizeof("ealgo=") - 1;
346 } else if ((p = strstr(token, "keylen=")) == token) {
347 keylen_str = p + sizeof("keylen=") - 1;
349 ul = strtoul(keylen_str, &p, 10);
351 if (*p != '\0' || ul > INT_MAX)
355 warn("Invalid keylen: %s", keylen_str);
360 } else if ((p = strstr(token, "sectorsize=")) == token) {
361 sectorsize_str = p + sizeof("sectorsize=") - 1;
363 ul = strtoul(sectorsize_str, &p, 10);
365 if (*p != '\0' || ul > INT_MAX)
369 warn("Invalid sectorsize: %s",
374 } else if (strcmp(token, "sw") != 0) {
375 warnx("Invalid option: %s", token);
384 * If we do not have a sector size at this point, fill in
385 * pagesize as sector size.
387 if (sectorsize_str == NULL) {
388 /* Use pagesize as default sectorsize. */
389 pagesize = getpagesize();
390 pagesize_len = snprintf(NULL, 0, "%d", pagesize) + 1;
391 p = alloca(pagesize_len);
392 snprintf(p, pagesize_len, "%d", pagesize);
396 argsize = asprintf(&args, "%s%s%s%s%s%s%s%s -d",
397 aflag, aalgo, eflag, ealgo, lflag, keylen_str,
398 sflag, sectorsize_str);
405 swap_on_off_geli(const char *name, char *mntops, int doingall)
411 error = stat(name, &sb);
413 if (which_prog == SWAPON) do {
414 /* Skip if the .eli device already exists. */
418 args = swap_on_geli_args(mntops);
422 dname = swap_basename(name);
428 error = run_cmd(NULL, "%s onetime%s %s", _PATH_GELI, args,
435 /* error occured during creation. */
437 warnx("%s: Invalid parameters", name);
442 return (swap_on_off_sfile(name, doingall));
446 swap_on_off_md(const char *name, char *mntops, int doingall)
449 int fd, mdunit, error;
451 static char mdpath[PATH_MAX], linebuf[PATH_MAX];
458 if (strlen(name) == (sizeof(MD_NAME) - 1))
462 ul = strtoul(name + 2, &p, 10);
464 if (*p != '\0' || ul > INT_MAX)
468 warn("Bad device unit: %s", name);
475 if ((p = strstr(mntops, "file=")) != NULL) {
476 vnodefile = strdup(p + sizeof("file=") - 1);
477 p = strchr(vnodefile, ',');
481 if (vnodefile == NULL) {
482 warnx("file option not found for %s", name);
486 if (which_prog == SWAPON) {
488 error = run_cmd(&fd, "%s -l -n -f %s",
489 _PATH_MDCONFIG, vnodefile);
491 /* md device found. Ignore it. */
494 warnx("%s: Device already in use",
499 error = run_cmd(&fd, "%s -a -t vnode -n -f %s",
500 _PATH_MDCONFIG, vnodefile);
502 warnx("mdconfig (attach) error: file=%s",
507 sfd = fdopen(fd, "r");
509 warn("mdconfig (attach) fdopen error");
513 p = fgetln(sfd, &linelen);
515 (linelen < 2 || linelen > sizeof(linebuf))) {
516 warn("mdconfig (attach) unexpected output");
520 strncpy(linebuf, p, linelen);
521 linebuf[linelen - 1] = '\0';
523 ul = strtoul(linebuf, &p, 10);
525 if (*p != '\0' || ul > INT_MAX)
529 warn("mdconfig (attach) unexpected output: %s",
536 error = run_cmd(&fd, "%s -l -n -f %s -u %d",
537 _PATH_MDCONFIG, vnodefile, mdunit);
539 /* md device found. Ignore it. */
542 warnx("md%d on %s: Device already "
543 "in use", mdunit, vnodefile);
547 error = run_cmd(NULL, "%s -a -t vnode -u %d -f %s",
548 _PATH_MDCONFIG, mdunit, vnodefile);
550 warnx("mdconfig (attach) error: "
551 "md%d on file=%s", mdunit, vnodefile);
556 } else /* SWAPOFF */ {
558 error = run_cmd(&fd, "%s -l -n -f %s",
559 _PATH_MDCONFIG, vnodefile);
561 /* md device not found. Ignore it. */
564 warnx("md on %s: Device not found",
569 sfd = fdopen(fd, "r");
571 warn("mdconfig (list) fdopen error");
575 p = fgetln(sfd, &linelen);
577 (linelen < 2 || linelen > sizeof(linebuf) - 1)) {
578 warn("mdconfig (list) unexpected output");
582 strncpy(linebuf, p, linelen);
583 linebuf[linelen - 1] = '\0';
584 p = strchr(linebuf, ' ');
588 ul = strtoul(linebuf, &p, 10);
590 if (*p != '\0' || ul > INT_MAX)
594 warn("mdconfig (list) unexpected output: %s",
601 error = run_cmd(&fd, "%s -l -n -f %s -u %d",
602 _PATH_MDCONFIG, vnodefile, mdunit);
604 /* md device not found. Ignore it. */
607 warnx("md%d on %s: Device not found",
614 snprintf(mdpath, sizeof(mdpath), "%s%s%d", _PATH_DEV,
616 mdpath[sizeof(mdpath) - 1] = '\0';
617 ret = swap_on_off_sfile(mdpath, doingall);
619 if (which_prog == SWAPOFF) {
621 error = run_cmd(NULL, "%s -d -u %d",
622 _PATH_MDCONFIG, mdunit);
624 warn("mdconfig (detach) detach failed: %s%s%d",
625 _PATH_DEV, MD_NAME, mdunit);
638 run_cmd(int *ofd, const char *cmdline, ...)
641 char **argv, **argvp, *cmd, *p;
642 int argc, pid, status, rv;
643 int pfd[2], nfd, dup2dn;
645 va_start(ap, cmdline);
646 rv = vasprintf(&cmd, cmdline, ap);
648 warn("%s", __func__);
653 for (argc = 1, p = cmd; (p = strchr(p, ' ')) != NULL; p++)
655 argv = (char **)malloc(sizeof(*argv) * (argc + 1));
656 for (p = cmd, argvp = argv; (*argvp = strsep(&p, " ")) != NULL;)
657 if (**argvp != '\0' && (++argvp > &argv[argc])) {
661 /* The argv array ends up NULL-terminated here. */
666 fprintf(stderr, "DEBUG: running:");
667 /* Should be equivalent to 'cmd' (before strsep, of course). */
668 for (i = 0; argv[i] != NULL; i++)
669 fprintf(stderr, " %s", argv[i]);
670 fprintf(stderr, "\n");
675 if (pipe(&pfd[0]) == -1) {
676 warn("%s: pipe", __func__);
687 if (dup2(pfd[1], STDOUT_FILENO) < 0)
688 err(1, "dup2 in %s", __func__);
689 nfd = open(_PATH_DEVNULL, O_RDWR);
691 err(1, "%s: open %s", __func__, _PATH_DEVNULL);
692 if (dup2(nfd, STDIN_FILENO) < 0)
693 err(1, "%s: dup2", __func__);
694 if (dup2dn && dup2(nfd, STDOUT_FILENO) < 0)
695 err(1, "%s: dup2", __func__);
696 if (dup2(nfd, STDERR_FILENO) < 0)
697 err(1, "%s: dup2", __func__);
698 execv(argv[0], argv);
699 warn("exec: %s", argv[0]);
702 err(1, "%s: fork", __func__);
706 while (waitpid(pid, &status, 0) != pid)
708 return (WEXITSTATUS(status));
712 swap_on_off_sfile(const char *name, int doingall)
716 if (which_prog == SWAPON)
717 error = swapon(name);
719 error = swapoff(name);
725 warnx("%s: Device already in use", name);
728 if (which_prog == SWAPON)
729 warnx("%s: NSWAPDEV limit reached", name);
730 else if (doingall == 0)
746 fprintf(stderr, "usage: %s ", getprogname());
750 fprintf(stderr, "[-F fstab] -aLq | file ...\n");
753 fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n");
760 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen,
766 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE,
767 HN_B | HN_NOSPACE | HN_DECIMAL);
768 snprintf(buf, bufsize, "%*s", hlen, tmp);
770 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize);
774 swaplist(int lflag, int sflag, int hflag)
776 size_t mibsize, size;
778 int hlen, mib[16], n, pagesize;
786 pagesize = getpagesize();
789 blocksize = 1024 * 1024 * 1024;
790 strlcpy(buf, "1GB-blocks", sizeof(buf));
795 strlcpy(buf, "Bytes", sizeof(buf));
800 strlcpy(buf, "1kB-blocks", sizeof(buf));
804 blocksize = 1024 * 1024;
805 strlcpy(buf, "1MB-blocks", sizeof(buf));
809 getbsize(&hlen, &blocksize);
810 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize);
814 mibsize = nitems(mib);
815 if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
816 err(1, "sysctlnametomib()");
819 printf("%-13s %*s %*s\n",
828 if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
830 if (xsw.xsw_version != XSWDEV_VERSION)
831 errx(1, "xswdev version mismatch");
833 tmp_total = (long long)xsw.xsw_nblks * pagesize;
834 tmp_used = (long long)xsw.xsw_used * pagesize;
838 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen,
840 printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR),
842 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen,
851 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize);
852 printf("Total: %s ", buf);
853 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize);