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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 Red Hat Inc.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
#include "optgroups.h"
#include "ignore-value.h"
/* Confirmed this is true for Linux swap partitions from the Linux sources. */
#define SWAP_LABEL_MAX 16
/* Convenient place to test for the later version of e2fsprogs
* and util-linux which supports -U parameters to specify UUIDs.
* (Not supported in RHEL 5).
*/
int
optgroup_linuxfsuuid_available (void)
{
char *err;
int av;
/* Upstream util-linux have been gradually changing '--help' to go
* from stderr to stdout, and changing the return code from 1 to 0.
* Thus we need to fold stdout and stderr together, and ignore the
* return code.
*/
ignore_value (commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
"mkswap", "--help", NULL));
av = strstr (err, "-U") != NULL;
free (err);
return av;
}
static int
mkswap (const char *device, const char *flag, const char *value)
{
char *err;
int r;
if (!flag)
r = command (NULL, &err, "mkswap", "-f", device, NULL);
else
r = command (NULL, &err, "mkswap", "-f", flag, value, device, NULL);
if (r == -1) {
reply_with_error ("%s", err);
free (err);
return -1;
}
free (err);
return 0;
}
int
do_mkswap (const char *device)
{
return mkswap (device, NULL, NULL);
}
int
do_mkswap_L (const char *label, const char *device)
{
if (strlen (label) > SWAP_LABEL_MAX) {
reply_with_error ("%s: Linux swap labels are limited to %d bytes",
label, SWAP_LABEL_MAX);
return -1;
}
return mkswap (device, "-L", label);
}
int
do_mkswap_U (const char *uuid, const char *device)
{
return mkswap (device, "-U", uuid);
}
int
do_mkswap_file (const char *path)
{
char *buf;
int r;
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
r = mkswap (buf, NULL, NULL);
free (buf);
return r;
}
static int
swaponoff (const char *cmd, const char *flag, const char *value)
{
char *err;
int r;
if (!flag)
r = command (NULL, &err, cmd, value, NULL);
else
r = command (NULL, &err, cmd, flag, value, NULL);
if (r == -1) {
reply_with_error ("%s: %s", value, err);
free (err);
return -1;
}
free (err);
/* Possible fix for RHBZ#516096. It probably doesn't hurt to do
* this in any case.
*/
udev_settle ();
return 0;
}
int
do_swapon_device (const char *device)
{
return swaponoff ("swapon", NULL, device);
}
int
do_swapoff_device (const char *device)
{
return swaponoff ("swapoff", NULL, device);
}
int
do_swapon_file (const char *path)
{
char *buf;
int r;
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
r = swaponoff ("swapon", NULL, buf);
free (buf);
return r;
}
int
do_swapoff_file (const char *path)
{
char *buf;
int r;
buf = sysroot_path (path);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
r = swaponoff ("swapoff", NULL, buf);
free (buf);
return r;
}
int
do_swapon_label (const char *label)
{
if (strlen (label) > SWAP_LABEL_MAX) {
reply_with_error ("%s: Linux swap labels are limited to %d bytes",
label, SWAP_LABEL_MAX);
return -1;
}
return swaponoff ("swapon", "-L", label);
}
int
do_swapoff_label (const char *label)
{
if (strlen (label) > SWAP_LABEL_MAX) {
reply_with_error ("%s: Linux swap labels are limited to %d bytes",
label, SWAP_LABEL_MAX);
return -1;
}
return swaponoff ("swapoff", "-L", label);
}
int
do_swapon_uuid (const char *uuid)
{
return swaponoff ("swapon", "-U", uuid);
}
int
do_swapoff_uuid (const char *uuid)
{
return swaponoff ("swapoff", "-U", uuid);
}
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