mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
#include <inttypes.h>
|
|
#include <unistd.h>
|
|
|
|
#include "daemon.h"
|
|
#include "actions.h"
|
|
|
|
/* These functions are all about using the blockdev command, so
|
|
* we centralize it in one call.
|
|
*/
|
|
static int64_t
|
|
call_blockdev (const char *device, const char *switc, int extraarg, int prints)
|
|
{
|
|
int r;
|
|
int64_t rv;
|
|
char *out, *err;
|
|
const char *argv[] = {
|
|
"blockdev",
|
|
switc,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
char buf[64];
|
|
|
|
if (extraarg > 0) {
|
|
snprintf (buf, sizeof buf, "%d", extraarg);
|
|
argv[2] = buf;
|
|
argv[3] = device;
|
|
} else
|
|
argv[2] = device;
|
|
|
|
r = commandv (&out, &err, argv);
|
|
|
|
if (r == -1) {
|
|
reply_with_error ("%s: %s", argv[0], err);
|
|
free (err);
|
|
free (out);
|
|
return -1;
|
|
}
|
|
|
|
rv = 0;
|
|
|
|
if (prints) {
|
|
if (sscanf (out, "%" SCNi64, &rv) != 1) {
|
|
reply_with_error ("%s: expected output, but got nothing", argv[0]);
|
|
free (out);
|
|
free (err);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
free (out);
|
|
free (err);
|
|
|
|
return rv;
|
|
}
|
|
|
|
int
|
|
do_blockdev_setro (const char *device)
|
|
{
|
|
return (int) call_blockdev (device, "--setro", 0, 0);
|
|
}
|
|
|
|
int
|
|
do_blockdev_setrw (const char *device)
|
|
{
|
|
return (int) call_blockdev (device, "--setrw", 0, 0);
|
|
}
|
|
|
|
int
|
|
do_blockdev_getro (const char *device)
|
|
{
|
|
return (int) call_blockdev (device, "--getro", 0, 1);
|
|
}
|
|
|
|
int
|
|
do_blockdev_getss (const char *device)
|
|
{
|
|
return (int) call_blockdev (device, "--getss", 0, 1);
|
|
}
|
|
|
|
int
|
|
do_blockdev_getbsz (const char *device)
|
|
{
|
|
return (int) call_blockdev (device, "--getbsz", 0, 1);
|
|
}
|
|
|
|
int
|
|
do_blockdev_setbsz (const char *device, int blocksize)
|
|
{
|
|
if (blocksize <= 0 /* || blocksize >= what? */) {
|
|
reply_with_error ("blocksize must be > 0");
|
|
return -1;
|
|
}
|
|
return (int) call_blockdev (device, "--setbsz", blocksize, 0);
|
|
}
|
|
|
|
int64_t
|
|
do_blockdev_getsz (const char *device)
|
|
{
|
|
return call_blockdev (device, "--getsz", 0, 1);
|
|
}
|
|
|
|
int64_t
|
|
do_blockdev_getsize64 (const char *device)
|
|
{
|
|
return call_blockdev (device, "--getsize64", 0, 1);
|
|
}
|
|
|
|
int
|
|
do_blockdev_flushbufs (const char *device)
|
|
{
|
|
return call_blockdev (device, "--flushbufs", 0, 0);
|
|
}
|
|
|
|
int
|
|
do_blockdev_rereadpt (const char *device)
|
|
{
|
|
return call_blockdev (device, "--rereadpt", 0, 0);
|
|
}
|