mirror of
https://github.com/sheumann/hush.git
synced 2024-08-17 00:29:03 +00:00
130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini swapon/swapoff implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 1999 by Lineo, inc.
|
|
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.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 "internal.h"
|
|
#include <stdio.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/swap.h>
|
|
#include <mntent.h>
|
|
#include <dirent.h>
|
|
#include <fstab.h>
|
|
#include <errno.h>
|
|
|
|
|
|
static int whichApp;
|
|
static const char *appName;
|
|
|
|
static const char swapoff_usage[] =
|
|
"swapoff [OPTION] [device]\n\n"
|
|
"Stop swapping virtual memory pages on the given device.\n\n"
|
|
"Options:\n"
|
|
"\t-a\tStop swapping on all swap devices\n";
|
|
|
|
static const char swapon_usage[] =
|
|
"swapon [OPTION] [device]\n\n"
|
|
"Start swapping virtual memory pages on the given device.\n\n"
|
|
"Options:\n"
|
|
"\t-a\tStart swapping on all swap devices\n";
|
|
|
|
|
|
#define SWAPON_APP 1
|
|
#define SWAPOFF_APP 2
|
|
|
|
|
|
static void swap_enable_disable(char *device)
|
|
{
|
|
int status;
|
|
|
|
if (whichApp == SWAPON_APP)
|
|
status = swapon(device, 0);
|
|
else
|
|
status = swapoff(device);
|
|
|
|
if (status != 0) {
|
|
perror(appName);
|
|
exit(FALSE);
|
|
}
|
|
}
|
|
|
|
static void do_em_all()
|
|
{
|
|
struct mntent *m;
|
|
FILE *f = setmntent("/etc/fstab", "r");
|
|
|
|
if (f == NULL) {
|
|
perror("/etc/fstab");
|
|
exit(FALSE);
|
|
}
|
|
while ((m = getmntent(f)) != NULL) {
|
|
if (!strstr(m->mnt_type, MNTTYPE_SWAP)) {
|
|
swap_enable_disable(m->mnt_fsname);
|
|
}
|
|
}
|
|
endmntent(f);
|
|
exit(TRUE);
|
|
}
|
|
|
|
|
|
extern int swap_on_off_main(int argc, char **argv)
|
|
{
|
|
if (strcmp(*argv, "swapon") == 0) {
|
|
appName = *argv;
|
|
whichApp = SWAPON_APP;
|
|
|
|
} else {
|
|
appName = *argv;
|
|
whichApp = SWAPOFF_APP;
|
|
}
|
|
|
|
if (argc != 2) {
|
|
goto usage_and_exit;
|
|
}
|
|
argc--;
|
|
argv++;
|
|
|
|
/* Parse any options */
|
|
while (**argv == '-') {
|
|
while (*++(*argv))
|
|
switch (**argv) {
|
|
case 'a':
|
|
{
|
|
struct stat statBuf;
|
|
|
|
if (stat("/etc/fstab", &statBuf) < 0)
|
|
fatalError("/etc/fstab file missing\n");
|
|
}
|
|
do_em_all();
|
|
break;
|
|
default:
|
|
goto usage_and_exit;
|
|
}
|
|
}
|
|
swap_enable_disable(*argv);
|
|
exit(TRUE);
|
|
|
|
usage_and_exit:
|
|
usage((whichApp == SWAPON_APP) ? swapon_usage : swapoff_usage);
|
|
exit(FALSE);
|
|
}
|