devtab - swapon now supports /etc/devtab
[dragonfly.git] / sbin / swapon / swapon.c
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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.
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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 $
b942f274 36 * $DragonFly: src/sbin/swapon/swapon.c,v 1.5 2005/11/06 12:50:21 swildner Exp $
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37 */
38
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39#include <err.h>
40#include <errno.h>
41#include <fstab.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <unistd.h>
46
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47static void usage(void);
48int add(char *name, int ignoreebusy);
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49
50int
51main(int argc, char **argv)
52{
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53 struct fstab *fsp;
54 int stat;
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55 int ch, doall;
56
57 doall = 0;
58 while ((ch = getopt(argc, argv, "a")) != -1)
59 switch((char)ch) {
60 case 'a':
61 doall = 1;
62 break;
63 case '?':
64 default:
65 usage();
66 }
67 argv += optind;
68
69 stat = 0;
c4d5a9b3 70 if (doall) {
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71 while ((fsp = getfsent()) != NULL) {
72 if (strcmp(fsp->fs_type, FSTAB_SW))
73 continue;
74 if (strstr(fsp->fs_mntops, "noauto"))
75 continue;
76 if (add(fsp->fs_spec, 1))
77 stat = 1;
78 else
79 printf("swapon: adding %s as swap device\n",
80 fsp->fs_spec);
81 }
c4d5a9b3 82 } else if (*argv == NULL) {
984263bc 83 usage();
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84 }
85 while (*argv) {
86 stat |= add(getdevpath(*argv, 0), 0);
87 ++argv;
88 }
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89 exit(stat);
90}
91
92int
93add(char *name, int ignoreebusy)
94{
95 if (swapon(name) == -1) {
96 switch (errno) {
97 case EBUSY:
98 if (!ignoreebusy)
99 warnx("%s: device already in use", name);
100 break;
101 default:
102 warn("%s", name);
103 break;
104 }
105 return(1);
106 }
107 return(0);
108}
109
110static void
b5744197 111usage(void)
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112{
113 fprintf(stderr, "usage: swapon [-a] [special_file ...]\n");
114 exit(1);
115}