81 lines
1.4 KiB
C
81 lines
1.4 KiB
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 v2 or later, see the file LICENSE in this tarball.
|
|
*/
|
|
|
|
#include "busybox.h"
|
|
#include <mntent.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <string.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 (bb_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 = bb_getopt_ulflags(argc, argv, "a");
|
|
if (ret & DO_ALL)
|
|
return do_em_all();
|
|
|
|
ret = 0;
|
|
while (*++argv)
|
|
ret += swap_enable_disable(*argv);
|
|
return ret;
|
|
}
|