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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009-2012 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 <inttypes.h>
#include <string.h>
#include <unistd.h>
#include "read-file.h"
#include "daemon.h"
#include "actions.h"
#include "optgroups.h"
GUESTFSD_EXT_CMD(str_ntfsclone, ntfsclone);
/* Read the error file. Returns a string that the caller must free. */
static char *
read_error_file (char *error_file)
{
size_t len;
char *str;
str = read_file (error_file, &len);
if (str == NULL) {
str = strdup ("(no error)");
if (str == NULL) {
perror ("strdup");
exit (EXIT_FAILURE);
}
len = strlen (str);
}
/* Remove trailing \n character if any. */
if (len > 0 && str[len-1] == '\n')
str[--len] = '\0';
return str; /* caller frees */
}
static int
write_cb (void *fd_ptr, const void *buf, size_t len)
{
int fd = *(int *)fd_ptr;
return xwrite (fd, buf, len);
}
/* Has one FileIn parameter. */
int
do_ntfsclone_in (const char *device)
{
int err, r;
FILE *fp;
char *cmd;
char error_file[] = "/tmp/ntfscloneXXXXXX";
int fd;
fd = mkstemp (error_file);
if (fd == -1) {
reply_with_perror ("mkstemp");
return -1;
}
close (fd);
/* Construct the command. */
if (asprintf_nowarn (&cmd, "%s -O %s --restore-image - 2> %s",
str_ntfsclone, device, error_file) == -1) {
err = errno;
r = cancel_receive ();
errno = err;
reply_with_perror ("asprintf");
unlink (error_file);
return -1;
}
if (verbose)
fprintf (stderr, "%s\n", cmd);
fp = popen (cmd, "w");
if (fp == NULL) {
err = errno;
r = cancel_receive ();
errno = err;
reply_with_perror ("%s", cmd);
unlink (error_file);
free (cmd);
return -1;
}
free (cmd);
/* The semantics of fwrite are too undefined, so write to the
* file descriptor directly instead.
*/
fd = fileno (fp);
r = receive_file (write_cb, &fd);
if (r == -1) { /* write error */
cancel_receive ();
char *errstr = read_error_file (error_file);
reply_with_error ("write error on device: %s: %s", device, errstr);
free (errstr);
unlink (error_file);
pclose (fp);
return -1;
}
if (r == -2) { /* cancellation from library */
/* This error is ignored by the library since it initiated the
* cancel. Nevertheless we must send an error reply here.
*/
reply_with_error ("ntfsclone cancelled");
pclose (fp);
unlink (error_file);
return -1;
}
if (pclose (fp) != 0) {
char *errstr = read_error_file (error_file);
reply_with_error ("ntfsclone subcommand failed on device: %s: %s",
device, errstr);
free (errstr);
unlink (error_file);
return -1;
}
unlink (error_file);
return 0;
}
/* Has one FileOut parameter. */
/* Takes optional arguments, consult optargs_bitmask. */
int
do_ntfsclone_out (const char *device,
int metadataonly, int rescue, int ignorefscheck,
int preservetimestamps, int force)
{
int r;
FILE *fp;
char *cmd;
char buf[GUESTFS_MAX_CHUNK_SIZE];
/* Construct the ntfsclone command. */
if (asprintf (&cmd, "%s -o - --save-image%s%s%s%s%s %s",
str_ntfsclone,
(optargs_bitmask & GUESTFS_NTFSCLONE_OUT_METADATAONLY_BITMASK) && metadataonly ? " --metadata" : "",
(optargs_bitmask & GUESTFS_NTFSCLONE_OUT_RESCUE_BITMASK) && rescue ? " --rescue" : "",
(optargs_bitmask & GUESTFS_NTFSCLONE_OUT_IGNOREFSCHECK_BITMASK) && ignorefscheck ? " --ignore-fs-check" : "",
(optargs_bitmask & GUESTFS_NTFSCLONE_OUT_PRESERVETIMESTAMPS_BITMASK) && preservetimestamps ? " --preserve-timestamps" : "",
(optargs_bitmask & GUESTFS_NTFSCLONE_OUT_FORCE_BITMASK) && force ? " --force" : "",
device) == -1) {
reply_with_perror ("asprintf");
return -1;
}
if (verbose)
fprintf (stderr, "%s\n", cmd);
fp = popen (cmd, "r");
if (fp == NULL) {
reply_with_perror ("%s", cmd);
free (cmd);
return -1;
}
free (cmd);
/* Now we must send the reply message, before the file contents. After
* this there is no opportunity in the protocol to send any error
* message back. Instead we can only cancel the transfer.
*/
reply (NULL, NULL);
while ((r = fread (buf, 1, sizeof buf, fp)) > 0) {
if (send_file_write (buf, r) < 0) {
pclose (fp);
return -1;
}
}
if (ferror (fp)) {
perror (device);
send_file_end (1); /* Cancel. */
pclose (fp);
return -1;
}
if (pclose (fp) != 0) {
perror (device);
send_file_end (1); /* Cancel. */
return -1;
}
if (send_file_end (0)) /* Normal end of file. */
return -1;
return 0;
}
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