swapon.c revision 6661 
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 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
41static char sccsid[] = "@(#)swapon.c	8.1 (Berkeley) 6/5/93";
42#endif /* not lint */
43
44#include <fstab.h>
45#include <errno.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <unistd.h>
49
50void	usage __P((void));
51int	add __P((char *name, int ignoreebusy));
52
53int
54main(int argc, char **argv)
55{
56	extern char *optarg;
57	extern int optind;
58	register struct fstab *fsp;
59	register int stat;
60	int ch, doall;
61
62	doall = 0;
63	while ((ch = getopt(argc, argv, "a")) != EOF)
64		switch((char)ch) {
65		case 'a':
66			doall = 1;
67			break;
68		case '?':
69		default:
70			usage();
71		}
72	argv += optind;
73
74	stat = 0;
75	if (doall)
76		while ((fsp = getfsent()) != NULL) {
77			if (strcmp(fsp->fs_type, FSTAB_SW))
78				continue;
79			if (add(fsp->fs_spec, 1))
80				stat = 1;
81			else
82				printf("swapon: adding %s as swap device\n",
83				    fsp->fs_spec);
84		}
85	else if (!*argv)
86		usage();
87	for (; *argv; ++argv)
88		stat |= add(*argv, 0);
89	exit(stat);
90}
91
92int
93add(char *name, int ignoreebusy)
94{
95	extern int errno;
96
97	if (swapon(name) == -1) {
98		switch (errno) {
99		case EINVAL:
100			fprintf(stderr, "swapon: %s: device not configured\n",
101			    name);
102			break;
103		case EBUSY:
104			if (!ignoreebusy)
105				fprintf(stderr,
106				    "swapon: %s: device already in use\n",
107				     name);
108			break;
109		default:
110			fprintf(stderr, "swapon: %s: ", name);
111			perror((char *)NULL);
112			break;
113		}
114		return(1);
115	}
116	return(0);
117}
118
119void
120usage()
121{
122	fprintf(stderr, "usage: swapon [-a] [special_file ...]\n");
123	exit(1);
124}
125