swapon.c revision 78732 
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.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)swapon.c	8.1 (Berkeley) 6/5/93";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/sbin/swapon/swapon.c 78732 2001-06-24 23:04:23Z dd $";
46#endif /* not lint */
47
48#include <err.h>
49#include <errno.h>
50#include <fstab.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <unistd.h>
55
56static void usage __P((void));
57int	add __P((char *name, int ignoreebusy));
58
59int
60main(int argc, char **argv)
61{
62	register struct fstab *fsp;
63	register int stat;
64	int ch, doall;
65
66	doall = 0;
67	while ((ch = getopt(argc, argv, "a")) != -1)
68		switch((char)ch) {
69		case 'a':
70			doall = 1;
71			break;
72		case '?':
73		default:
74			usage();
75		}
76	argv += optind;
77
78	stat = 0;
79	if (doall)
80		while ((fsp = getfsent()) != NULL) {
81			if (strcmp(fsp->fs_type, FSTAB_SW))
82				continue;
83			if (strstr(fsp->fs_mntops, "noauto"))
84				continue;
85			if (add(fsp->fs_spec, 1))
86				stat = 1;
87			else
88				printf("swapon: adding %s as swap device\n",
89				    fsp->fs_spec);
90		}
91	else if (!*argv)
92		usage();
93	for (; *argv; ++argv)
94		stat |= add(*argv, 0);
95	exit(stat);
96}
97
98int
99add(char *name, int ignoreebusy)
100{
101	if (swapon(name) == -1) {
102		switch (errno) {
103		case EBUSY:
104			if (!ignoreebusy)
105				warnx("%s: device already in use", name);
106			break;
107		default:
108			warn("%s", name);
109			break;
110		}
111		return(1);
112	}
113	return(0);
114}
115
116static void
117usage()
118{
119	fprintf(stderr, "usage: swapon [-a] [special_file ...]\n");
120	exit(1);
121}
122