[dragonfly.git] / 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 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.
 *
 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
 * @(#)swapon.c	8.1 (Berkeley) 6/5/93
 * $FreeBSD: src/sbin/swapon/swapon.c,v 1.8.2.2 2001/07/30 10:30:11 dd Exp $
 */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/diskslice.h>
#include <sys/ioctl_compat.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 doingall, int trim);
static void swaplist(int lflag, int sflag, int hflag);

enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;

int
main(int argc, char **argv)
{
	struct fstab *fsp;
	char *ptr;
	int ret;
	int ch;
	int doall, sflag, lflag, hflag, qflag, eflag;

	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;

	sflag = lflag = hflag = qflag = doall = eflag = 0;
	while ((ch = getopt(argc, argv, "AadeghklmqsU")) != -1) {
		switch((char)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 'e':
			eflag = 1;
			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;

	ret = 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, eflag)) {
					ret = 1;
				} else {
					if (!qflag) {
						printf("%s: %sing %s as swap device\n",
						    getprogname(),
						    which_prog == SWAPOFF ? "remov" : "add",
						    fsp->fs_spec);
					}
				}
			}
		} else if (*argv == NULL) {
			usage();
		}
		for (; *argv; ++argv) {
			if (swap_on_off(getdevpath(*argv, 0), 0, eflag)) {
				ret = 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(ret);
}

/*
 * TRIM the device
 */
static
void
trim_volume(char * name)
{	
	struct partinfo pinfo;
	int fd,i,n;
	size_t bytes = 0,ksize;
	char *xswbuf;
	struct xswdev *xsw;


	/*
	* Determine if this device is already being used by swap without 
	* calling swapon(). 
	*/
	if ((sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) ||
	    bytes == 0) {
		err(1, "sysctlbyname()");
	}

	xswbuf = malloc(bytes);
	if ((sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) ||
	    bytes == 0) {
			free(xswbuf);
			err(1, "sysctlbyname()");
	}

	ksize = ((struct xswdev *)xswbuf)->xsw_size;
	n = (int)(bytes / ksize);
	for (i = 0; i < n; ++i) {
		xsw = (void *)((char *)xswbuf + i * ksize);

		if (xsw->xsw_dev == NODEV )
			continue;
		if(!strcmp(devname(xsw->xsw_dev, S_IFCHR),
		    name + strlen("/dev/"))) {
			warnx("%s: device already a swap device", name);
			exit(1);
		}
	}
	
	/*
	 * Get the size and offset of this parititon/device
	 */
	fd = open(name, O_RDWR);
	if (fd < 0)
		err(1, "Unable to open %s R+W", name);
	if (ioctl(fd, DIOCGPART, &pinfo) < 0) {
		printf("Cannot trim regular file\n");
		usage ();
	}
	off_t ioarg[2];
	
	/*Trim the Device*/	
	ioarg[0] = pinfo.media_offset;
	ioarg[1] = pinfo.media_size;
	printf("Trimming Device:%s, sectors (%llu -%llu)\n",name,
	     (unsigned long long)ioarg[0]/512,
	     (unsigned long long)ioarg[1]/512);
	if (ioctl(fd, IOCTLTRIM, ioarg) < 0) {
		printf("Device trim failed\n");
		usage ();
	}
	close(fd);
}

static int
swap_on_off(char *name, int doingall, int trim)
{
	if (which_prog == SWAPON && trim){
		char sysctl_name[64];
		int trim_enabled = 0;
		size_t olen = sizeof(trim_enabled);
		char *dev_name = strdup(name);
		dev_name = strtok(dev_name + strlen("/dev/da"),"s");
		sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name);
		sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0);
		if(errno == ENOENT) {
			printf("Device:%s does not support the TRIM command\n",
			    name);
			usage();
		}
		if(!trim_enabled) {
			printf("Erase device option selected, but sysctl (%s) "
			    "is not enabled\n",sysctl_name);
			usage();
		}

		trim_volume(name);

	}
	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, "-aeq | file ...\n");
		break;
	case SWAPCTL:
		fprintf(stderr, "[-AeghklmsU] [-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 ksize, bytes = 0;
	char *xswbuf;
	struct xswdev *xsw;
	int hlen, pagesize;
	int i, n;
	long blocksize;
	long long total, used, tmp_total, 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;
	}

	if (sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0)
		err(1, "sysctlbyname()");
	if (bytes == 0)
		err(1, "sysctlbyname()");

	xswbuf = malloc(bytes);
	if (sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) {
		free(xswbuf);
		err(1, "sysctlbyname()");
	}
	if (bytes == 0) {
		free(xswbuf);
		err(1, "sysctlbyname()");
	}

	/*
	 * Calculate size of xsw entry returned by kernel (it can be larger
	 * than the one we have if there is a version mismatch).
	 */
	ksize = ((struct xswdev *)xswbuf)->xsw_size;
	n = (int)(bytes / ksize);

	if (lflag) {
		printf("%-13s %*s %*s\n",
		    "Device:",
		    hlen, buf,
		    hlen, "Used:");
	}

	total = used = tmp_total = tmp_used = 0;
	for (i = 0; i < n; ++i) {
		xsw = (void *)((char *)xswbuf + i * ksize);

		if (xsw->xsw_nblks == 0)
			continue;

		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);
			if (xsw->xsw_dev == NODEV) {
				printf("%-13s %s ", "[NFS swap]", buf);
			} else {
				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 (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);
	}
}
Commit	Line	Data
984263bc MD	1	/*
	2	* Copyright (c) 1980, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
1de703da MD	32	*
	33	* @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
	34	* @(#)swapon.c 8.1 (Berkeley) 6/5/93
	35	* $FreeBSD: src/sbin/swapon/swapon.c,v 1.8.2.2 2001/07/30 10:30:11 dd Exp $
984263bc MD	36	*/
984263bc MD	37
9f3543c6 MD	38	#include <sys/param.h>
	39	#include <sys/stat.h>
	40	#include <sys/sysctl.h>
e0fb398b T	41	#include <sys/diskslice.h>
e0fb398b T	42	#include <sys/ioctl_compat.h>
9f3543c6 MD	43	#include <vm/vm_param.h>
9f3543c6 MD	44
984263bc MD	45	#include <err.h>
	46	#include <errno.h>
	47	#include <fstab.h>
	48	#include <stdio.h>
	49	#include <stdlib.h>
	50	#include <string.h>
	51	#include <unistd.h>
9f3543c6 MD	52	#include <fcntl.h>
9f3543c6 MD	53	#include <libutil.h>
984263bc	54
9a76cd75	55	static void usage(void);
e0fb398b	56	static int swap_on_off(char *name, int doingall, int trim);
9f3543c6 MD	57	static void swaplist(int lflag, int sflag, int hflag);
	58
	59	enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL;
984263bc MD	60
	61	int
	62	main(int argc, char **argv)
	63	{
b942f274	64	struct fstab *fsp;
9f3543c6 MD	65	char *ptr;
	66	int ret;
	67	int ch;
e0fb398b	68	int doall, sflag, lflag, hflag, qflag, eflag;
984263bc	69
9f3543c6 MD	70	if ((ptr = strrchr(argv[0], '/')) == NULL)
	71	ptr = argv[0];
	72	if (strstr(ptr, "swapon"))
	73	which_prog = SWAPON;
	74	else if (strstr(ptr, "swapoff"))
	75	which_prog = SWAPOFF;
	76	orig_prog = which_prog;
	77
e0fb398b T	78	sflag = lflag = hflag = qflag = doall = eflag = 0;
e0fb398b T	79	while ((ch = getopt(argc, argv, "AadeghklmqsU")) != -1) {
984263bc	80	switch((char)ch) {
9f3543c6 MD	81	case 'A':
	82	if (which_prog == SWAPCTL) {
	83	doall = 1;
	84	which_prog = SWAPON;
	85	} else {
	86	usage();
	87	}
	88	break;
984263bc	89	case 'a':
9f3543c6 MD	90	if (which_prog == SWAPON \|\| which_prog == SWAPOFF)
	91	doall = 1;
	92	else
	93	which_prog = SWAPON;
	94	break;
	95	case 'd':
	96	if (which_prog == SWAPCTL)
	97	which_prog = SWAPOFF;
	98	else
	99	usage();
	100	break;
e0fb398b T	101	case 'e':
	102	eflag = 1;
	103	break;
9f3543c6 MD	104	case 'g':
	105	hflag = 'G';
	106	break;
	107	case 'h':
	108	hflag = 'H';
	109	break;
	110	case 'k':
	111	hflag = 'K';
	112	break;
	113	case 'l':
	114	lflag = 1;
	115	break;
	116	case 'm':
	117	hflag = 'M';
	118	break;
	119	case 'q':
	120	if (which_prog == SWAPON \|\| which_prog == SWAPOFF)
	121	qflag = 1;
	122	break;
	123	case 's':
	124	sflag = 1;
	125	break;
	126	case 'U':
	127	if (which_prog == SWAPCTL) {
	128	doall = 1;
	129	which_prog = SWAPOFF;
	130	} else {
	131	usage();
	132	}
984263bc MD	133	break;
	134	case '?':
	135	default:
	136	usage();
	137	}
9f3543c6	138	}
984263bc MD	139	argv += optind;
984263bc MD	140
9f3543c6 MD	141	ret = 0;
	142	if (which_prog == SWAPON \|\| which_prog == SWAPOFF) {
	143	if (doall) {
	144	while ((fsp = getfsent()) != NULL) {
	145	if (strcmp(fsp->fs_type, FSTAB_SW))
	146	continue;
	147	if (strstr(fsp->fs_mntops, "noauto"))
	148	continue;
e0fb398b	149	if (swap_on_off(fsp->fs_spec, 1, eflag)) {
9f3543c6 MD	150	ret = 1;
	151	} else {
	152	if (!qflag) {
	153	printf("%s: %sing %s as swap device\n",
	154	getprogname(),
	155	which_prog == SWAPOFF ? "remov" : "add",
	156	fsp->fs_spec);
	157	}
	158	}
	159	}
	160	} else if (*argv == NULL) {
	161	usage();
984263bc	162	}
9f3543c6	163	for (; *argv; ++argv) {
e0fb398b	164	if (swap_on_off(getdevpath(*argv, 0), 0, eflag)) {
9f3543c6 MD	165	ret = 1;
	166	} else if (orig_prog == SWAPCTL) {
	167	printf("%s: %sing %s as swap device\n",
	168	getprogname(),
	169	which_prog == SWAPOFF ? "remov" : "add",
	170	*argv);
	171	}
	172	}
	173	} else {
	174	if (lflag \|\| sflag)
	175	swaplist(lflag, sflag, hflag);
	176	else
	177	usage();
c4d5a9b3	178	}
9f3543c6	179	exit(ret);
984263bc MD	180	}
984263bc MD	181
e0fb398b T	182	/*
	183	* TRIM the device
	184	*/
	185	static
	186	void
	187	trim_volume(char * name)
	188	{
	189	struct partinfo pinfo;
	190	int fd,i,n;
	191	size_t bytes = 0,ksize;
	192	char *xswbuf;
	193	struct xswdev *xsw;
	194
	195
	196	/*
	197	* Determine if this device is already being used by swap without
	198	* calling swapon().
	199	*/
	200	if ((sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) \|\|
	201	bytes == 0) {
	202	err(1, "sysctlbyname()");
	203	}
	204
	205	xswbuf = malloc(bytes);
	206	if ((sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) \|\|
	207	bytes == 0) {
	208	free(xswbuf);
	209	err(1, "sysctlbyname()");
	210	}
	211
	212	ksize = ((struct xswdev *)xswbuf)->xsw_size;
	213	n = (int)(bytes / ksize);
	214	for (i = 0; i < n; ++i) {
	215	xsw = (void )((char )xswbuf + i * ksize);
	216
	217	if (xsw->xsw_dev == NODEV )
	218	continue;
	219	if(!strcmp(devname(xsw->xsw_dev, S_IFCHR),
	220	name + strlen("/dev/"))) {
	221	warnx("%s: device already a swap device", name);
	222	exit(1);
	223	}
	224	}
	225
	226	/*
	227	* Get the size and offset of this parititon/device
	228	*/
	229	fd = open(name, O_RDWR);
	230	if (fd < 0)
	231	err(1, "Unable to open %s R+W", name);
	232	if (ioctl(fd, DIOCGPART, &pinfo) < 0) {
	233	printf("Cannot trim regular file\n");
	234	usage ();
	235	}
	236	off_t ioarg[2];
	237
	238	/Trim the Device/
	239	ioarg[0] = pinfo.media_offset;
	240	ioarg[1] = pinfo.media_size;
	241	printf("Trimming Device:%s, sectors (%llu -%llu)\n",name,
	242	(unsigned long long)ioarg[0]/512,
	243	(unsigned long long)ioarg[1]/512);
	244	if (ioctl(fd, IOCTLTRIM, ioarg) < 0) {
	245	printf("Device trim failed\n");
246	usage ();
247	}
248	close(fd);
249	}
250
9f3543c6	251	static int
e0fb398b	252	swap_on_off(char *name, int doingall, int trim)
984263bc	253	{
e0fb398b T	254	if (which_prog == SWAPON && trim){
	255	char sysctl_name[64];
	256	int trim_enabled = 0;
	257	size_t olen = sizeof(trim_enabled);
	258	char *dev_name = strdup(name);
	259	dev_name = strtok(dev_name + strlen("/dev/da"),"s");
	260	sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name);
	261	sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0);
	262	if(errno == ENOENT) {
	263	printf("Device:%s does not support the TRIM command\n",
	264	name);
	265	usage();
	266	}
	267	if(!trim_enabled) {
	268	printf("Erase device option selected, but sysctl (%s) "
	269	"is not enabled\n",sysctl_name);
	270	usage();
	271	}
	272
	273	trim_volume(name);
	274
	275	}
9f3543c6 MD	276	if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) {
9f3543c6 MD	277	switch(errno) {
984263bc	278	case EBUSY:
9f3543c6	279	if (!doingall)
984263bc MD	280	warnx("%s: device already in use", name);
984263bc MD	281	break;
9f3543c6 MD	282	case EINVAL:
	283	if (which_prog == SWAPON)
	284	warnx("%s: NSWAPDEV limit reached", name);
	285	else if (!doingall)
	286	warn("%s", name);
	287	break;
984263bc MD	288	default:
	289	warn("%s", name);
	290	break;
	291	}
	292	return(1);
	293	}
	294	return(0);
	295	}
	296
	297	static void
b5744197	298	usage(void)
984263bc	299	{
9f3543c6 MD	300	fprintf(stderr, "usage: %s ", getprogname());
	301	switch (orig_prog) {
	302	case SWAPON:
	303	case SWAPOFF:
e0fb398b	304	fprintf(stderr, "-aeq \| file ...\n");
9f3543c6 MD	305	break;
9f3543c6 MD	306	case SWAPCTL:
e0fb398b	307	fprintf(stderr, "[-AeghklmsU] [-a file ... \| -d file ...]\n");
9f3543c6 MD	308	break;
9f3543c6 MD	309	}
984263bc MD	310	exit(1);
984263bc MD	311	}
9f3543c6 MD	312
	313	static void
	314	sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen,
	315	long blocksize)
	316	{
	317	if (hflag == 'H') {
	318	char tmp[16];
	319
	320	humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE,
	321	HN_B \| HN_NOSPACE \| HN_DECIMAL);
	322	snprintf(buf, bufsize, "%*s", hlen, tmp);
	323	} else {
	324	snprintf(buf, bufsize, "%*lld", hlen, val / blocksize);
	325	}
	326	}
	327
	328	static void
	329	swaplist(int lflag, int sflag, int hflag)
	330	{
	331	size_t ksize, bytes = 0;
	332	char *xswbuf;
	333	struct xswdev *xsw;
	334	int hlen, pagesize;
	335	int i, n;
	336	long blocksize;
	337	long long total, used, tmp_total, tmp_used;
	338	char buf[32];
	339
	340	pagesize = getpagesize();
	341	switch(hflag) {
	342	case 'G':
	343	blocksize = 1024 * 1024 * 1024;
	344	strlcpy(buf, "1GB-blocks", sizeof(buf));
	345	hlen = 10;
	346	break;
	347	case 'H':
	348	blocksize = -1;
	349	strlcpy(buf, "Bytes", sizeof(buf));
	350	hlen = 10;
	351	break;
	352	case 'K':
	353	blocksize = 1024;
	354	strlcpy(buf, "1kB-blocks", sizeof(buf));
	355	hlen = 10;
	356	break;
	357	case 'M':
	358	blocksize = 1024 * 1024;
	359	strlcpy(buf, "1MB-blocks", sizeof(buf));
	360	hlen = 10;
	361	break;
	362	default:
	363	getbsize(&hlen, &blocksize);
	364	snprintf(buf, sizeof(buf), "%ld-blocks", blocksize);
	365	break;
	366	}
	367
	368	if (sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0)
	369	err(1, "sysctlbyname()");
	370	if (bytes == 0)
	371	err(1, "sysctlbyname()");
	372
	373	xswbuf = malloc(bytes);
	374	if (sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) {
	375	free(xswbuf);
376	err(1, "sysctlbyname()");
377	}
378	if (bytes == 0) {
379	free(xswbuf);
380	err(1, "sysctlbyname()");
381	}
382
383	/*
384	* Calculate size of xsw entry returned by kernel (it can be larger
385	* than the one we have if there is a version mismatch).
386	*/
387	ksize = ((struct xswdev *)xswbuf)->xsw_size;
388	n = (int)(bytes / ksize);
389
390	if (lflag) {
391	printf("%-13s %s %s\n",
392	"Device:",
393	hlen, buf,
394	hlen, "Used:");
395	}
396
397	total = used = tmp_total = tmp_used = 0;
398	for (i = 0; i < n; ++i) {
399	xsw = (void )((char )xswbuf + i * ksize);
400
401	if (xsw->xsw_nblks == 0)
402	continue;
403
ebd20800 SW	404	tmp_total = (long long)xsw->xsw_nblks * pagesize;
	405	tmp_used = (long long)xsw->xsw_used * pagesize;
	406	total += tmp_total;
	407	used += tmp_used;
9f3543c6 MD	408	if (lflag) {
	409	sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen,
	410	blocksize);
	411	if (xsw->xsw_dev == NODEV) {
	412	printf("%-13s %s ", "[NFS swap]", buf);
	413	} else {
	414	printf("/dev/%-8s %s ",
	415	devname(xsw->xsw_dev, S_IFCHR), buf);
	416	}
	417
	418	sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen,
	419	blocksize);
	420	printf("%s\n", buf);
	421	}
	422	}
	423
	424	if (sflag) {
	425	sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize);
	426	printf("Total: %s ", buf);
	427	sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize);
	428	printf("%s\n", buf);
	429	}
	430	}