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/* Add/remove paging devices
Copyright (C) 1997,98,99 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.org>
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd 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, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <argp.h>
#include <error.h>
#include <hurd/store.h>
#include <version.h>
#include <mach/default_pager.h>
#include <mntent.h>
#ifdef SWAPOFF
const char *argp_program_version = STANDARD_HURD_VERSION (swapoff);
#else
const char *argp_program_version = STANDARD_HURD_VERSION (swapon);
#endif
static struct argp_option options[] =
{
{"standard", 'a', 0, 0,
"Use all devices marked as `swap' in " _PATH_MNTTAB},
{0, 0}
};
static char *args_doc = "DEVICE...";
#ifdef SWAPOFF
static char *doc = "Stop paging on DEVICE...";
#else
static char *doc = "Start paging onto DEVICE...";
#endif
static int
swaponoff (const char *file, int add)
{
error_t err;
struct store *store;
static mach_port_t def_pager = MACH_PORT_NULL;
static mach_port_t dev_master = MACH_PORT_NULL;
err = store_open (file, 0, 0, &store);
if (err)
{
error (0, err, "%s", file);
return err;
}
if (store->class != &store_device_class)
{
error (0, 0, "%s: Can't get device", file);
return err;
}
if (! (store->flags & STORE_ENFORCED))
{
error (0, 0, "%s: Can only page to the entire device", file);
return err;
}
if (def_pager == MACH_PORT_NULL)
{
mach_port_t host;
err = get_privileged_ports (&host, &dev_master);
if (err)
error (12, err, "Cannot get host port");
err = vm_set_default_memory_manager (host, &def_pager);
mach_port_deallocate (mach_task_self (), host);
if (err)
error (13, err, "Cannot get default pager port");
}
{
char pname[sizeof "/dev/" + strlen (store->name) + 1];
snprintf (pname, sizeof pname, "/dev/%s", store->name);
err = default_pager_paging_file (def_pager, dev_master, pname, add);
if (err)
error (0, err, "%s", file);
}
store_free (store);
return err;
}
static int do_all;
int
main(int argc, char *argv[])
{
/* Parse our options... */
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case 'a':
do_all = 1;
break;
case ARGP_KEY_ARG:
#ifdef SWAPOFF
#define ONOFF 0
#else
#define ONOFF 1
#endif
swaponoff (arg, ONOFF);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
struct argp argp = {options, parse_opt, args_doc, doc};
argp_parse (&argp, argc, argv, 0, 0, 0);
if (do_all)
{
struct mntent *me;
FILE *f;
f = setmntent (_PATH_MNTTAB, "r");
if (f == NULL)
error (1, errno, "Cannot read %s", _PATH_MNTTAB);
else
{
int done = 0, err = 0;
while ((me = getmntent (f)) != NULL)
if (!strcmp (me->mnt_type, MNTTYPE_SWAP))
{
done = 1;
err |= swaponoff (me->mnt_fsname, ONOFF);
}
if (done == 0)
error (2, 0, "No swap partitions found in %s", _PATH_MNTTAB);
else if (err)
return 1;
}
}
return 0;
}
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