busybox/util-linux/swaponoff.c

/* vi: set sw=4 ts=4: */
/*
 * Mini swapon/swapoff implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
 */

#include "busybox.h"
#include <mntent.h>
#include <sys/swap.h>


static int swap_enable_disable(char *device)
{
	int status;
	struct stat st;

	xstat(device, &st);

	/* test for holes */
	if (S_ISREG(st.st_mode))
		if (st.st_blocks * 512 < st.st_size)
			bb_error_msg_and_die("swap file has holes");

	if (applet_name[5] == 'n')
		status = swapon(device, 0);
	else
		status = swapoff(device);

	if (status != 0) {
		bb_perror_msg("%s", device);
		return 1;
	}

	return 0;
}

static int do_em_all(void)
{
	struct mntent *m;
	FILE *f;
	int err;

	f = setmntent("/etc/fstab", "r");
	if (f == NULL)
		bb_perror_msg_and_die("/etc/fstab");

	err = 0;
	while ((m = getmntent(f)) != NULL)
		if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0)
			err += swap_enable_disable(m->mnt_fsname);

	endmntent(f);

	return err;
}

#define DO_ALL    0x01

int swap_on_off_main(int argc, char **argv)
{
	int ret;

	if (argc == 1)
		bb_show_usage();

	ret = getopt32(argc, argv, "a");
	if (ret & DO_ALL)
		return do_em_all();

	ret = 0;
	while (*++argv)
		ret += swap_enable_disable(*argv);
	return ret;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Mini swapon/swapoff implementation for busybox
4	*
5	* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6	*
7	* Licensed under the GPL version 2, see the file LICENSE in this tarball.
8	*/
9
10	#include "busybox.h"
11	#include <mntent.h>
12	#include <sys/swap.h>
13
14
15	static int swap_enable_disable(char *device)
16	{
17	int status;
18	struct stat st;
19
20	xstat(device, &st);
21
22	/* test for holes */
23	if (S_ISREG(st.st_mode))
24	if (st.st_blocks * 512 < st.st_size)
25	bb_error_msg_and_die("swap file has holes");
26
27	if (applet_name[5] == 'n')
28	status = swapon(device, 0);
29	else
30	status = swapoff(device);
31
32	if (status != 0) {
33	bb_perror_msg("%s", device);
34	return 1;
35	}
36
37	return 0;
38	}
39
40	static int do_em_all(void)
41	{
42	struct mntent *m;
43	FILE *f;
44	int err;
45
46	f = setmntent("/etc/fstab", "r");
47	if (f == NULL)
48	bb_perror_msg_and_die("/etc/fstab");
49
50	err = 0;
51	while ((m = getmntent(f)) != NULL)
52	if (strcmp(m->mnt_type, MNTTYPE_SWAP) == 0)
53	err += swap_enable_disable(m->mnt_fsname);
54
55	endmntent(f);
56
57	return err;
58	}
59
60	#define DO_ALL 0x01
61
62	int swap_on_off_main(int argc, char **argv)
63	{
64	int ret;
65
66	if (argc == 1)
67	bb_show_usage();
68
69	ret = getopt32(argc, argv, "a");
70	if (ret & DO_ALL)
71	return do_em_all();
72
73	ret = 0;
74	while (*++argv)
75	ret += swap_enable_disable(*argv);
76	return ret;
77	}