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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
GUESTFSD_EXT_CMD(str_dd, dd);
int
do_dd (const char *src, const char *dest)
{
int src_is_dev, dest_is_dev;
char *if_arg, *of_arg;
char *err;
int r;
src_is_dev = STRPREFIX (src, "/dev/");
if (src_is_dev)
r = asprintf (&if_arg, "if=%s", src);
else
r = asprintf (&if_arg, "if=%s%s", sysroot, src);
if (r == -1) {
reply_with_perror ("asprintf");
return -1;
}
dest_is_dev = STRPREFIX (dest, "/dev/");
if (dest_is_dev)
r = asprintf (&of_arg, "of=%s", dest);
else
r = asprintf (&of_arg, "of=%s%s", sysroot, dest);
if (r == -1) {
reply_with_perror ("asprintf");
free (if_arg);
return -1;
}
r = command (NULL, &err, str_dd, "bs=1024K", if_arg, of_arg, NULL);
free (if_arg);
free (of_arg);
if (r == -1) {
reply_with_error ("%s: %s: %s", src, dest, err);
free (err);
return -1;
}
free (err);
return 0;
}
int
do_copy_size (const char *src, const char *dest, int64_t ssize)
{
char *buf;
int src_fd, dest_fd;
if (STRPREFIX (src, "/dev/"))
src_fd = open (src, O_RDONLY | O_CLOEXEC);
else {
buf = sysroot_path (src);
if (!buf) {
reply_with_perror ("malloc");
return -1;
}
src_fd = open (buf, O_RDONLY | O_CLOEXEC);
free (buf);
}
if (src_fd == -1) {
reply_with_perror ("%s", src);
return -1;
}
if (STRPREFIX (dest, "/dev/"))
dest_fd = open (dest, O_WRONLY | O_CLOEXEC);
else {
buf = sysroot_path (dest);
if (!buf) {
reply_with_perror ("malloc");
close (src_fd);
return -1;
}
dest_fd = open (buf, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY|O_CLOEXEC, 0666);
free (buf);
}
if (dest_fd == -1) {
reply_with_perror ("%s", dest);
close (src_fd);
return -1;
}
uint64_t position = 0, size = (uint64_t) ssize;
while (position < size) {
char buf[1024*1024];
/* Calculate bytes to copy. */
uint64_t n64 = size - position;
size_t n;
if (n64 > sizeof buf)
n = sizeof buf;
else
n = (size_t) n64; /* safe because of if condition */
ssize_t r = read (src_fd, buf, n);
if (r == -1) {
reply_with_perror ("%s: read", src);
close (src_fd);
close (dest_fd);
return -1;
}
if (r == 0) {
reply_with_error ("%s: input file too short", src);
close (src_fd);
close (dest_fd);
return -1;
}
if (xwrite (dest_fd, buf, r) == -1) {
reply_with_perror ("%s: write", dest);
close (src_fd);
close (dest_fd);
return -1;
}
position += r;
notify_progress ((uint64_t) position, (uint64_t) size);
}
if (close (src_fd) == -1) {
reply_with_perror ("%s: close", src);
close (dest_fd);
return -1;
}
if (close (dest_fd) == -1) {
reply_with_perror ("%s: close", dest);
return -1;
}
return 0;
}
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