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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 <fcntl.h>
#include "../src/guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
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_upload (const char *filename)
{
int err, fd, r, is_dev;
is_dev = STRPREFIX (filename, "/dev/");
if (!is_dev) CHROOT_IN;
fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
if (!is_dev) CHROOT_OUT;
if (fd == -1) {
err = errno;
r = cancel_receive ();
errno = err;
if (r != -2) reply_with_perror ("%s", filename);
return -1;
}
r = receive_file (write_cb, &fd);
if (r == -1) { /* write error */
err = errno;
r = cancel_receive ();
errno = err;
if (r != -2) reply_with_error ("write error: %s", filename);
close (fd);
return -1;
}
if (r == -2) { /* cancellation from library */
close (fd);
/* Do NOT send any error. */
return -1;
}
if (close (fd) == -1) {
err = errno;
if (r == -1) /* if r == 0, file transfer ended already */
r = cancel_receive ();
errno = err;
if (r != -2)
reply_with_perror ("close: %s", filename);
return -1;
}
return 0;
}
/* Has one FileOut parameter. */
int
do_download (const char *filename)
{
int fd, r, is_dev;
char buf[GUESTFS_MAX_CHUNK_SIZE];
is_dev = STRPREFIX (filename, "/dev/");
if (!is_dev) CHROOT_IN;
fd = open (filename, O_RDONLY);
if (!is_dev) CHROOT_OUT;
if (fd == -1) {
reply_with_perror ("%s", filename);
return -1;
}
/* 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 = read (fd, buf, sizeof buf)) > 0) {
if (send_file_write (buf, r) < 0) {
close (fd);
return -1;
}
}
if (r == -1) {
perror (filename);
send_file_end (1); /* Cancel. */
close (fd);
return -1;
}
if (close (fd) == -1) {
perror (filename);
send_file_end (1); /* Cancel. */
return -1;
}
if (send_file_end (0)) /* Normal end of file. */
return -1;
return 0;
}
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