mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include "../src/guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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static int
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write_cb (void *fd_ptr, const void *buf, int len)
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{
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int fd = *(int *)fd_ptr;
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return xwrite (fd, buf, len);
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}
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/* Has one FileIn parameter. */
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int
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do_upload (char *filename)
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{
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int err, fd, r, is_dev;
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is_dev = strncmp (filename, "/dev/", 5) == 0;
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if (!is_dev) {
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if (!root_mounted || filename[0] != '/') {
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cancel_receive ();
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reply_with_error ("upload: root must be mounted and path must be absolute");
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return -1;
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}
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}
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if (!is_dev) CHROOT_IN;
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fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
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if (!is_dev) CHROOT_OUT;
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if (fd == -1) {
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err = errno;
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cancel_receive ();
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errno = err;
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reply_with_perror ("%s", filename);
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return -1;
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}
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r = receive_file (write_cb, &fd);
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if (r == -1) { /* write error */
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err = errno;
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cancel_receive ();
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errno = err;
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reply_with_perror ("write: %s", filename);
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close (fd);
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return -1;
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}
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if (r == -2) { /* cancellation from library */
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close (fd);
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/* Do NOT send any error. */
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return -1;
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}
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if (close (fd) == -1) {
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err = errno;
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cancel_receive ();
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errno = err;
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reply_with_perror ("close: %s", filename);
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return -1;
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}
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return 0;
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}
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/* Has one FileOut parameter. */
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int
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do_download (char *filename)
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{
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int fd, r, is_dev;
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char buf[GUESTFS_MAX_CHUNK_SIZE];
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NEED_ROOT_OR_IS_DEVICE (filename, -1);
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is_dev = strncmp (filename, "/dev/", 5) == 0;
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if (!is_dev) CHROOT_IN;
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fd = open (filename, O_RDONLY);
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if (!is_dev) CHROOT_OUT;
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if (fd == -1) {
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reply_with_perror ("%s", filename);
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return -1;
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}
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/* Now we must send the reply message, before the file contents. After
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* this there is no opportunity in the protocol to send any error
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* message back. Instead we can only cancel the transfer.
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*/
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reply (NULL, NULL);
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while ((r = read (fd, buf, sizeof buf)) > 0) {
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if (send_file_write (buf, r) < 0) {
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close (fd);
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return -1;
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}
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}
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if (r == -1) {
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perror (filename);
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send_file_end (1); /* Cancel. */
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close (fd);
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return -1;
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}
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if (close (fd) == -1) {
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perror (filename);
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send_file_end (1); /* Cancel. */
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return -1;
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}
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send_file_end (0); /* Normal end of file. */
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return 0;
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}
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