330 lines
7.5 KiB
C
330 lines
7.5 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)swapon.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <vm/vm_param.h>
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#include <err.h>
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#include <errno.h>
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#include <fstab.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <libutil.h>
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static void usage(void);
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static int swap_on_off(char *name, int ignoreebusy);
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static void swaplist(int, int, int);
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enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;
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int
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main(int argc, char **argv)
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{
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struct fstab *fsp;
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char *ptr;
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int ret;
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int ch, doall;
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int sflag = 0, lflag = 0, hflag = 0, qflag = 0;
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const char *etc_fstab;
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if ((ptr = strrchr(argv[0], '/')) == NULL)
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ptr = argv[0];
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if (strstr(ptr, "swapon"))
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which_prog = SWAPON;
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else if (strstr(ptr, "swapoff"))
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which_prog = SWAPOFF;
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orig_prog = which_prog;
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doall = 0;
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etc_fstab = NULL;
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while ((ch = getopt(argc, argv, "AadghklmqsUF:")) != -1) {
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switch(ch) {
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case 'A':
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if (which_prog == SWAPCTL) {
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doall = 1;
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which_prog = SWAPON;
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} else {
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usage();
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}
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break;
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case 'a':
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if (which_prog == SWAPON || which_prog == SWAPOFF)
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doall = 1;
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else
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which_prog = SWAPON;
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break;
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case 'd':
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if (which_prog == SWAPCTL)
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which_prog = SWAPOFF;
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else
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usage();
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break;
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case 'g':
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hflag = 'G';
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break;
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case 'h':
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hflag = 'H';
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break;
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case 'k':
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hflag = 'K';
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break;
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case 'l':
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lflag = 1;
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break;
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case 'm':
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hflag = 'M';
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break;
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case 'q':
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if (which_prog == SWAPON || which_prog == SWAPOFF)
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qflag = 1;
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break;
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case 's':
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sflag = 1;
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break;
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case 'U':
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if (which_prog == SWAPCTL) {
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doall = 1;
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which_prog = SWAPOFF;
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} else {
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usage();
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}
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break;
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case 'F':
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etc_fstab = optarg;
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break;
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case '?':
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default:
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usage();
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}
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}
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argv += optind;
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ret = 0;
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if (etc_fstab != NULL)
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setfstab(etc_fstab);
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if (which_prog == SWAPON || which_prog == SWAPOFF) {
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if (doall) {
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while ((fsp = getfsent()) != NULL) {
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if (strcmp(fsp->fs_type, FSTAB_SW))
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continue;
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if (strstr(fsp->fs_mntops, "noauto"))
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continue;
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if (swap_on_off(fsp->fs_spec, 1)) {
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ret = 1;
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} else {
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if (!qflag) {
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printf("%s: %sing %s as swap device\n",
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getprogname(),
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which_prog == SWAPOFF ? "remov" : "add",
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fsp->fs_spec);
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}
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}
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}
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}
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else if (!*argv)
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usage();
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for (; *argv; ++argv) {
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if (swap_on_off(*argv, 0)) {
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ret = 1;
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} else if (orig_prog == SWAPCTL) {
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printf("%s: %sing %s as swap device\n",
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getprogname(), which_prog == SWAPOFF ? "remov" : "add",
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*argv);
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}
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}
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} else {
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if (lflag || sflag)
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swaplist(lflag, sflag, hflag);
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else
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usage();
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}
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exit(ret);
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}
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static int
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swap_on_off(char *name, int doingall)
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{
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if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) {
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switch (errno) {
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case EBUSY:
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if (!doingall)
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warnx("%s: device already in use", name);
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break;
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case EINVAL:
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if (which_prog == SWAPON)
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warnx("%s: NSWAPDEV limit reached", name);
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else if (!doingall)
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warn("%s", name);
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break;
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default:
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warn("%s", name);
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break;
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}
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return(1);
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}
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return(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: %s ", getprogname());
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switch(orig_prog) {
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case SWAPON:
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case SWAPOFF:
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fprintf(stderr, "[-F fstab] -aq | file ...\n");
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break;
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case SWAPCTL:
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fprintf(stderr, "[-AghklmsU] [-a file ... | -d file ...]\n");
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break;
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}
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exit(1);
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}
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static void
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sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen,
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long blocksize)
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{
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if (hflag == 'H') {
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char tmp[16];
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humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE,
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HN_B | HN_NOSPACE | HN_DECIMAL);
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snprintf(buf, bufsize, "%*s", hlen, tmp);
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} else {
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snprintf(buf, bufsize, "%*lld", hlen, val / blocksize);
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}
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}
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static void
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swaplist(int lflag, int sflag, int hflag)
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{
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size_t mibsize, size;
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struct xswdev xsw;
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int hlen, mib[16], n, pagesize;
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long blocksize;
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long long total = 0;
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long long used = 0;
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long long tmp_total;
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long long tmp_used;
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char buf[32];
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pagesize = getpagesize();
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switch(hflag) {
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case 'G':
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blocksize = 1024 * 1024 * 1024;
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strlcpy(buf, "1GB-blocks", sizeof(buf));
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hlen = 10;
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break;
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case 'H':
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blocksize = -1;
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strlcpy(buf, "Bytes", sizeof(buf));
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hlen = 10;
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break;
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case 'K':
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blocksize = 1024;
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strlcpy(buf, "1kB-blocks", sizeof(buf));
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hlen = 10;
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break;
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case 'M':
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blocksize = 1024 * 1024;
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strlcpy(buf, "1MB-blocks", sizeof(buf));
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hlen = 10;
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break;
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default:
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getbsize(&hlen, &blocksize);
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snprintf(buf, sizeof(buf), "%ld-blocks", blocksize);
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break;
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}
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mibsize = sizeof mib / sizeof mib[0];
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if (sysctlnametomib("vm.swap_info", mib, &mibsize) == -1)
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err(1, "sysctlnametomib()");
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if (lflag) {
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printf("%-13s %*s %*s\n",
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"Device:",
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hlen, buf,
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hlen, "Used:");
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}
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for (n = 0; ; ++n) {
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mib[mibsize] = n;
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size = sizeof xsw;
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if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, 0) == -1)
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break;
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if (xsw.xsw_version != XSWDEV_VERSION)
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errx(1, "xswdev version mismatch");
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tmp_total = (long long)xsw.xsw_nblks * pagesize;
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tmp_used = (long long)xsw.xsw_used * pagesize;
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total += tmp_total;
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used += tmp_used;
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if (lflag) {
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sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen,
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blocksize);
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printf("/dev/%-8s %s ", devname(xsw.xsw_dev, S_IFCHR),
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buf);
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sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen,
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blocksize);
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printf("%s\n", buf);
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}
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}
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if (errno != ENOENT)
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err(1, "sysctl()");
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if (sflag) {
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sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize);
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printf("Total: %s ", buf);
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sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize);
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printf("%s\n", buf);
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}
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}
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