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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/swapctl/swapctl.c	Lines:	0	166	0.0 %
Date:	2017-11-07	Branches:	0	148	0.0 %


/*	$OpenBSD: swapctl.c,v 1.23 2016/03/17 19:40:43 krw Exp $	*/
/*	$NetBSD: swapctl.c,v 1.9 1998/07/26 20:23:15 mycroft Exp $	*/

/*
 * Copyright (c) 1996, 1997 Matthew R. Green
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/*
 * swapctl command:
 *	-A		add all devices listed as `sw' in /etc/fstab
 *	-t [blk|noblk]	if -A, add either all block device or all non-block
 *			devices
 *	-a <path>	add this device
 *	-d <path>	remove this swap device
 *	-l		list swap devices
 *	-s		short listing of swap devices
 *	-k		use kilobytes
 *	-p <pri>	use this priority
 *	-c <path>	change priority
 *
 * or, if invoked as "swapon" (compatibility mode):
 *
 *	-a		all devices listed as `sw' in /etc/fstab
 *	-t		same as -t above (feature not present in old
 *			swapon(8) command)
 *	<dev>		add this device
 */

#include <sys/stat.h>
#include <sys/swap.h>
#include <sys/wait.h>

#include <unistd.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <fstab.h>
#include <util.h>

#include "swapctl.h"

int	command;

/*
 * Commands for swapctl(8).  These are mutually exclusive.
 */
#define	CMD_A		0x01	/* process /etc/fstab */
#define	CMD_a		0x02	/* add a swap file/device */
#define	CMD_c		0x04	/* change priority of a swap file/device */
#define	CMD_d		0x08	/* delete a swap file/device */
#define	CMD_l		0x10	/* list swap files/devices */
#define	CMD_s		0x20	/* summary of swap files/devices */

#define	SET_COMMAND(cmd) \
do { \
	if (command) \
		usage(); \
	command = (cmd); \
} while (0)

/*
 * Commands that require a "path" argument at the end of the command
 * line, and the ones which require that none exist.
 */
#define	REQUIRE_PATH	(CMD_a | CMD_c | CMD_d)
#define	REQUIRE_NOPATH	(CMD_A | CMD_l | CMD_s)

/*
 * Option flags, and the commands with which they are valid.
 */
int	kflag;		/* display in 1K blocks */
#define	KFLAG_CMDS	(CMD_l | CMD_s)

int	pflag;		/* priority was specified */
#define	PFLAG_CMDS	(CMD_A | CMD_a | CMD_c)

char	*tflag;		/* swap device type (blk or noblk) */
#define	TFLAG_CMDS	(CMD_A)

int	pri;		/* uses 0 as default pri */

static	void change_priority(char *);
static	void add_swap(char *);
static	void del_swap(char *);
static	void do_fstab(void);
static	void usage(void);
static	int  swapon_command(int, char **);

extern	char *__progname;	/* from crt0.o */

int
main(int argc, char *argv[])
{
	const char *errstr;
	int	c;

	if (strcmp(__progname, "swapon") == 0)
		return swapon_command(argc, argv);

	while ((c = getopt(argc, argv, "Aacdlkp:st:")) != -1) {
		switch (c) {
		case 'A':
			SET_COMMAND(CMD_A);
			break;

		case 'a':
			SET_COMMAND(CMD_a);
			break;

		case 'c':
			SET_COMMAND(CMD_c);
			break;

		case 'd':
			SET_COMMAND(CMD_d);
			break;

		case 'l':
			SET_COMMAND(CMD_l);
			break;

		case 'k':
			kflag = 1;
			break;

		case 'p':
			pflag = 1;
			pri = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr)
				errx(1, "-p %s: %s", errstr, optarg);
			break;

		case 's':
			SET_COMMAND(CMD_s);
			break;

		case 't':
			if (tflag != NULL)
				usage();
			tflag = optarg;
			break;

		default:
			usage();
			/* NOTREACHED */
		}
	}

	argv += optind;
	argc -= optind;

	/* Did the user specify a command? */
	if (command == 0) {
		if (argc == 0)
			SET_COMMAND(CMD_l);
		else
			usage();
	}

	switch (argc) {
	case 0:
		if (command & REQUIRE_PATH)
			usage();
		break;

	case 1:
		if (command & REQUIRE_NOPATH)
			usage();
		break;

	default:
		usage();
	}

	/* To change priority, you have to specify one. */
	if ((command == CMD_c) && pflag == 0)
		usage();

	/* Sanity-check -t */
	if (tflag != NULL) {
		if (command != CMD_A)
			usage();
		if (strcmp(tflag, "blk") != 0 &&
		    strcmp(tflag, "noblk") != 0)
			usage();
	}

	/* Dispatch the command. */
	switch (command) {
	case CMD_l:
		list_swap(pri, kflag, pflag, 1);
		break;

	case CMD_s:
		list_swap(pri, kflag, pflag, 0);
		break;

	case CMD_c:
		change_priority(argv[0]);
		break;

	case CMD_a:
		add_swap(argv[0]);
		break;

	case CMD_d:
		del_swap(argv[0]);
		break;

	case CMD_A:
		do_fstab();
		break;
	}

	return (0);
}

/*
 * swapon_command: emulate the old swapon(8) program.
 */
int
swapon_command(int argc, char **argv)
{
	int ch, fiztab = 0;

	while ((ch = getopt(argc, argv, "at:")) != -1) {
		switch (ch) {
		case 'a':
			fiztab = 1;
			break;
		case 't':
			if (tflag != NULL)
				usage();
			tflag = optarg;
			break;
		default:
			goto swapon_usage;
		}
	}
	argc -= optind;
	argv += optind;

	if (fiztab) {
		if (argc)
			goto swapon_usage;
		/* Sanity-check -t */
		if (tflag != NULL) {
			if (strcmp(tflag, "blk") != 0 &&
			    strcmp(tflag, "noblk") != 0)
				usage();
		}
		do_fstab();
		return (0);
	} else if (argc == 0 || tflag != NULL)
		goto swapon_usage;

	while (argc) {
		add_swap(argv[0]);
		argc--;
		argv++;
	}
	return (0);

 swapon_usage:
	fprintf(stderr, "usage: %s -a | path\n", __progname);
	return (1);
}

/*
 * change_priority:  change the priority of a swap device.
 */
void
change_priority(char *path)
{

	if (swapctl(SWAP_CTL, path, pri) < 0)
		warn("%s", path);
}

/*
 * add_swap:  add the pathname to the list of swap devices.
 */
void
add_swap(char *path)
{

	if (swapctl(SWAP_ON, path, pri) < 0)
		if (errno != EBUSY)
			err(1, "%s", path);
}

/*
 * del_swap:  remove the pathname from the list of swap devices.
 */
void
del_swap(char *path)
{

	if (swapctl(SWAP_OFF, path, pri) < 0)
		err(1, "%s", path);
}

void
do_fstab(void)
{
	struct	fstab *fp;
	char	*s;
	long	priority;
	struct	stat st;
	mode_t	rejecttype;
	int	gotone = 0;

	/*
	 * Select which mount point types to reject, depending on the
	 * value of the -t parameter.
	 */
	if (tflag != NULL) {
		if (strcmp(tflag, "blk") == 0)
			rejecttype = S_IFREG;
		else if (strcmp(tflag, "noblk") == 0)
			rejecttype = S_IFBLK;
	} else
		rejecttype = 0;

#define PRIORITYEQ	"priority="
#define NFSMNTPT	"nfsmntpt="
#define PATH_MOUNT	"/sbin/mount_nfs"
	while ((fp = getfsent()) != NULL) {
		const char *spec;

		if (strcmp(fp->fs_type, "sw") != 0)
			continue;

		spec = fp->fs_spec;

		if ((s = strstr(fp->fs_mntops, PRIORITYEQ)) != NULL) {
			s += sizeof(PRIORITYEQ) - 1;
			priority = atol(s);
		} else
			priority = pri;

		if ((s = strstr(fp->fs_mntops, NFSMNTPT)) != NULL) {
			char *t;
			pid_t pid;
			int status;

			/*
			 * Skip this song and dance if we're only
			 * doing block devices.
			 */
			if (rejecttype == S_IFREG)
				continue;

			t = strpbrk(s, ",");
			if (t != 0)
				*t = '\0';
			spec = strdup(s + strlen(NFSMNTPT));
			if (spec == NULL)
				err(1, "strdup");

			if (t != 0)
				*t = ',';

			if (strlen(spec) == 0) {
				warnx("empty mountpoint");
				free((char *)spec);
				continue;
			}

			switch (pid = vfork()) {
			case -1:	/* error */
				err(1, "vfork");
			case 0:
				execl(PATH_MOUNT, PATH_MOUNT, fp->fs_spec, spec,
				    (char *)NULL);
				err(1, "execl");
			}
			while (waitpid(pid, &status, 0) < 0)
				if (errno != EINTR)
					err(1, "waitpid");
			if (status != 0) {
				warnx("%s: mount failed", fp->fs_spec);
				free((char *)spec);
				continue;
			}
		} else if (isduid(spec, 0)) {
			if (rejecttype == S_IFBLK)
				continue;
		} else {
			/*
			 * Determine blk-ness.  Don't even consider a
			 * mountpoint outside /dev as a block device.
			 */
			if (rejecttype == S_IFREG) {
				if (strncmp("/dev/", spec, 5) != 0)
					continue;
			}
			if (stat(spec, &st) < 0) {
				warn("%s", spec);
				continue;
			}
			if ((st.st_mode & S_IFMT) == rejecttype)
				continue;

			/*
			 * Do not allow fancy objects to be swap areas.
			 */
			if (!S_ISREG(st.st_mode) &&
			    !S_ISBLK(st.st_mode))
				continue;
		}

		if (swapctl(SWAP_ON, spec, (int)priority) < 0) {
			if (errno != EBUSY)
				warn("%s", spec);
		} else {
			gotone = 1;
			printf("%s: adding %s as swap device at priority %d\n",
			    __progname, fp->fs_spec, (int)priority);
		}

		if (spec != fp->fs_spec)
			free((char *)spec);
	}
	if (gotone == 0)
		exit(1);
}

void
usage(void)
{

	fprintf(stderr, "usage: %s -A [-p priority] [-t blk | noblk]\n",
	    __progname);
	fprintf(stderr, "       %s -a [-p priority] path\n", __progname);
	fprintf(stderr, "       %s -c -p priority path\n", __progname);
	fprintf(stderr, "       %s -d path\n", __progname);
	fprintf(stderr, "       %s [[-l] | -s] [-k]\n", __progname);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: swapctl.c,v 1.23 2016/03/17 19:40:43 krw Exp $ */
2			/* $NetBSD: swapctl.c,v 1.9 1998/07/26 20:23:15 mycroft Exp $ */
3
4			/*
5			* Copyright (c) 1996, 1997 Matthew R. Green
6			* All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. The name of the author may not be used to endorse or promote products
17			* derived from this software without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21			* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22			* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23			* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24			* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26			* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27			* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			/*
33			* swapctl command:
34			* -A add all devices listed as `sw' in /etc/fstab
35			* -t [blk\|noblk] if -A, add either all block device or all non-block
36			* devices
37			* -a <path> add this device
38			* -d <path> remove this swap device
39			* -l list swap devices
40			* -s short listing of swap devices
41			* -k use kilobytes
42			* -p <pri> use this priority
43			* -c <path> change priority
44			*
45			* or, if invoked as "swapon" (compatibility mode):
46			*
47			* -a all devices listed as `sw' in /etc/fstab
48			* -t same as -t above (feature not present in old
49			* swapon(8) command)
50			* <dev> add this device
51			*/
52
53			#include <sys/stat.h>
54			#include <sys/swap.h>
55			#include <sys/wait.h>
56
57			#include <unistd.h>
58			#include <err.h>
59			#include <errno.h>
60			#include <stdio.h>
61			#include <stdlib.h>
62			#include <limits.h>
63			#include <string.h>
64			#include <fstab.h>
65			#include <util.h>
66
67			#include "swapctl.h"
68
69			int command;
70
71			/*
72			* Commands for swapctl(8). These are mutually exclusive.
73			*/
74			#define CMD_A 0x01 /* process /etc/fstab */
75			#define CMD_a 0x02 /* add a swap file/device */
76			#define CMD_c 0x04 /* change priority of a swap file/device */
77			#define CMD_d 0x08 /* delete a swap file/device */
78			#define CMD_l 0x10 /* list swap files/devices */
79			#define CMD_s 0x20 /* summary of swap files/devices */
80
81			#define SET_COMMAND(cmd) \
82			do { \
83			if (command) \
84			usage(); \
85			command = (cmd); \
86			} while (0)
87
88			/*
89			* Commands that require a "path" argument at the end of the command
90			* line, and the ones which require that none exist.
91			*/
92			#define REQUIRE_PATH (CMD_a \| CMD_c \| CMD_d)
93			#define REQUIRE_NOPATH (CMD_A \| CMD_l \| CMD_s)
94
95			/*
96			* Option flags, and the commands with which they are valid.
97			*/
98			int kflag; /* display in 1K blocks */
99			#define KFLAG_CMDS (CMD_l \| CMD_s)
100
101			int pflag; /* priority was specified */
102			#define PFLAG_CMDS (CMD_A \| CMD_a \| CMD_c)
103
104			char tflag; / swap device type (blk or noblk) */
105			#define TFLAG_CMDS (CMD_A)
106
107			int pri; /* uses 0 as default pri */
108
109			static void change_priority(char *);
110			static void add_swap(char *);
111			static void del_swap(char *);
112			static void do_fstab(void);
113			static void usage(void);
114			static int swapon_command(int, char **);
115
116			extern char __progname; / from crt0.o */
117
118			int
119			main(int argc, char *argv[])
120			{
121			const char *errstr;
122			int c;
123
124			if (strcmp(__progname, "swapon") == 0)
125			return swapon_command(argc, argv);
126
127			while ((c = getopt(argc, argv, "Aacdlkp:st:")) != -1) {
128			switch (c) {
129			case 'A':
130			SET_COMMAND(CMD_A);
131			break;
132
133			case 'a':
134			SET_COMMAND(CMD_a);
135			break;
136
137			case 'c':
138			SET_COMMAND(CMD_c);
139			break;
140
141			case 'd':
142			SET_COMMAND(CMD_d);
143			break;
144
145			case 'l':
146			SET_COMMAND(CMD_l);
147			break;
148
149			case 'k':
150			kflag = 1;
151			break;
152
153			case 'p':
154			pflag = 1;
155			pri = strtonum(optarg, 0, INT_MAX, &errstr);
156			if (errstr)
157			errx(1, "-p %s: %s", errstr, optarg);
158			break;
159
160			case 's':
161			SET_COMMAND(CMD_s);
162			break;
163
164			case 't':
165			if (tflag != NULL)
166			usage();
167			tflag = optarg;
168			break;
169
170			default:
171			usage();
172			/* NOTREACHED */
173			}
174			}
175
176			argv += optind;
177			argc -= optind;
178
179			/* Did the user specify a command? */
180			if (command == 0) {
181			if (argc == 0)
182			SET_COMMAND(CMD_l);
183			else
184			usage();
185			}
186
187			switch (argc) {
188			case 0:
189			if (command & REQUIRE_PATH)
190			usage();
191			break;
192
193			case 1:
194			if (command & REQUIRE_NOPATH)
195			usage();
196			break;
197
198			default:
199			usage();
200			}
201
202			/* To change priority, you have to specify one. */
203			if ((command == CMD_c) && pflag == 0)
204			usage();
205
206			/* Sanity-check -t */
207			if (tflag != NULL) {
208			if (command != CMD_A)
209			usage();
210			if (strcmp(tflag, "blk") != 0 &&
211			strcmp(tflag, "noblk") != 0)
212			usage();
213			}
214
215			/* Dispatch the command. */
216			switch (command) {
217			case CMD_l:
218			list_swap(pri, kflag, pflag, 1);
219			break;
220
221			case CMD_s:
222			list_swap(pri, kflag, pflag, 0);
223			break;
224
225			case CMD_c:
226			change_priority(argv[0]);
227			break;
228
229			case CMD_a:
230			add_swap(argv[0]);
231			break;
232
233			case CMD_d:
234			del_swap(argv[0]);
235			break;
236
237			case CMD_A:
238			do_fstab();
239			break;
240			}
241
242			return (0);
243			}
244
245			/*
246			* swapon_command: emulate the old swapon(8) program.
247			*/
248			int
249			swapon_command(int argc, char **argv)
250			{
251			int ch, fiztab = 0;
252
253			while ((ch = getopt(argc, argv, "at:")) != -1) {
254			switch (ch) {
255			case 'a':
256			fiztab = 1;
257			break;
258			case 't':
259			if (tflag != NULL)
260			usage();
261			tflag = optarg;
262			break;
263			default:
264			goto swapon_usage;
265			}
266			}
267			argc -= optind;
268			argv += optind;
269
270			if (fiztab) {
271			if (argc)
272			goto swapon_usage;
273			/* Sanity-check -t */
274			if (tflag != NULL) {
275			if (strcmp(tflag, "blk") != 0 &&
276			strcmp(tflag, "noblk") != 0)
277			usage();
278			}
279			do_fstab();
280			return (0);
281			} else if (argc == 0 \|\| tflag != NULL)
282			goto swapon_usage;
283
284			while (argc) {
285			add_swap(argv[0]);
286			argc--;
287			argv++;
288			}
289			return (0);
290
291			swapon_usage:
292			fprintf(stderr, "usage: %s -a \| path\n", __progname);
293			return (1);
294			}
295
296			/*
297			* change_priority: change the priority of a swap device.
298			*/
299			void
300			change_priority(char *path)
301			{
302
303			if (swapctl(SWAP_CTL, path, pri) < 0)
304			warn("%s", path);
305			}
306
307			/*
308			* add_swap: add the pathname to the list of swap devices.
309			*/
310			void
311			add_swap(char *path)
312			{
313
314			if (swapctl(SWAP_ON, path, pri) < 0)
315			if (errno != EBUSY)
316			err(1, "%s", path);
317			}
318
319			/*
320			* del_swap: remove the pathname from the list of swap devices.
321			*/
322			void
323			del_swap(char *path)
324			{
325
326			if (swapctl(SWAP_OFF, path, pri) < 0)
327			err(1, "%s", path);
328			}
329
330			void
331			do_fstab(void)
332			{
333			struct fstab *fp;
334			char *s;
335			long priority;
336			struct stat st;
337			mode_t rejecttype;
338			int gotone = 0;
339
340			/*
341			* Select which mount point types to reject, depending on the
342			* value of the -t parameter.
343			*/
344			if (tflag != NULL) {
345			if (strcmp(tflag, "blk") == 0)
346			rejecttype = S_IFREG;
347			else if (strcmp(tflag, "noblk") == 0)
348			rejecttype = S_IFBLK;
349			} else
350			rejecttype = 0;
351
352			#define PRIORITYEQ "priority="
353			#define NFSMNTPT "nfsmntpt="
354			#define PATH_MOUNT "/sbin/mount_nfs"
355			while ((fp = getfsent()) != NULL) {
356			const char *spec;
357
358			if (strcmp(fp->fs_type, "sw") != 0)
359			continue;
360
361			spec = fp->fs_spec;
362
363			if ((s = strstr(fp->fs_mntops, PRIORITYEQ)) != NULL) {
364			s += sizeof(PRIORITYEQ) - 1;
365			priority = atol(s);
366			} else
367			priority = pri;
368
369			if ((s = strstr(fp->fs_mntops, NFSMNTPT)) != NULL) {
370			char *t;
371			pid_t pid;
372			int status;
373
374			/*
375			* Skip this song and dance if we're only
376			* doing block devices.
377			*/
378			if (rejecttype == S_IFREG)
379			continue;
380
381			t = strpbrk(s, ",");
382			if (t != 0)
383			*t = '\0';
384			spec = strdup(s + strlen(NFSMNTPT));
385			if (spec == NULL)
386			err(1, "strdup");
387
388			if (t != 0)
389			*t = ',';
390
391			if (strlen(spec) == 0) {
392			warnx("empty mountpoint");
393			free((char *)spec);
394			continue;
395			}
396
397			switch (pid = vfork()) {
398			case -1: /* error */
399			err(1, "vfork");
400			case 0:
401			execl(PATH_MOUNT, PATH_MOUNT, fp->fs_spec, spec,
402			(char *)NULL);
403			err(1, "execl");
404			}
405			while (waitpid(pid, &status, 0) < 0)
406			if (errno != EINTR)
407			err(1, "waitpid");
408			if (status != 0) {
409			warnx("%s: mount failed", fp->fs_spec);
410			free((char *)spec);
411			continue;
412			}
413			} else if (isduid(spec, 0)) {
414			if (rejecttype == S_IFBLK)
415			continue;
416			} else {
417			/*
418			* Determine blk-ness. Don't even consider a
419			* mountpoint outside /dev as a block device.
420			*/
421			if (rejecttype == S_IFREG) {
422			if (strncmp("/dev/", spec, 5) != 0)
423			continue;
424			}
425			if (stat(spec, &st) < 0) {
426			warn("%s", spec);
427			continue;
428			}
429			if ((st.st_mode & S_IFMT) == rejecttype)
430			continue;
431
432			/*
433			* Do not allow fancy objects to be swap areas.
434			*/
435			if (!S_ISREG(st.st_mode) &&
436			!S_ISBLK(st.st_mode))
437			continue;
438			}
439
440			if (swapctl(SWAP_ON, spec, (int)priority) < 0) {
441			if (errno != EBUSY)
442			warn("%s", spec);
443			} else {
444			gotone = 1;
445			printf("%s: adding %s as swap device at priority %d\n",
446			__progname, fp->fs_spec, (int)priority);
447			}
448
449			if (spec != fp->fs_spec)
450			free((char *)spec);
451			}
452			if (gotone == 0)
453			exit(1);
454			}
455
456			void
457			usage(void)
458			{
459
460			fprintf(stderr, "usage: %s -A [-p priority] [-t blk \| noblk]\n",
461			__progname);
462			fprintf(stderr, " %s -a [-p priority] path\n", __progname);
463			fprintf(stderr, " %s -c -p priority path\n", __progname);
464			fprintf(stderr, " %s -d path\n", __progname);
465			fprintf(stderr, " %s [[-l] \| -s] [-k]\n", __progname);
466			exit(1);
467			}