mirror of
https://github.com/sheumann/hush.git
synced 2024-08-07 09:29:31 +00:00
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini swapon/swapoff implementation for busybox
|
|
*
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <mntent.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/swap.h>
|
|
|
|
#include "busybox.h"
|
|
|
|
static int swap_enable_disable(const char *device)
|
|
{
|
|
int status;
|
|
struct stat st;
|
|
|
|
if (stat(device, &st) < 0) {
|
|
bb_perror_msg_and_die("cannot stat %s", device);
|
|
}
|
|
|
|
/* 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 EXIT_FAILURE;
|
|
}
|
|
/*printf("%s: %s\n", bb_applet_name, device);*/
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
static int do_em_all(void)
|
|
{
|
|
struct mntent *m;
|
|
FILE *f = setmntent("/etc/fstab", "r");
|
|
int err = 0;
|
|
|
|
if (f == NULL)
|
|
bb_perror_msg_and_die("/etc/fstab");
|
|
while ((m = getmntent(f)) != NULL) {
|
|
if (strcmp(m->mnt_type, MNTTYPE_SWAP)==0) {
|
|
if(swap_enable_disable(m->mnt_fsname) == EXIT_FAILURE)
|
|
err++;
|
|
}
|
|
}
|
|
endmntent(f);
|
|
return err;
|
|
}
|
|
|
|
#define DO_ALL 1
|
|
|
|
extern int swap_on_off_main(int argc, char **argv)
|
|
{
|
|
unsigned long opt = bb_getopt_ulflags (argc, argv, "a");
|
|
|
|
if (argc != 2) {
|
|
bb_show_usage();
|
|
}
|
|
|
|
if (opt & DO_ALL)
|
|
return do_em_all();
|
|
|
|
return swap_enable_disable(argv[1]);
|
|
}
|