1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "../src/guestfs_protocol.h"
31 write_cb (void *fd_ptr, const void *buf, size_t len)
33 int fd = *(int *)fd_ptr;
34 return xwrite (fd, buf, len);
37 /* Has one FileIn parameter. */
39 do_upload (const char *filename)
41 int err, fd, r, is_dev;
43 is_dev = STRPREFIX (filename, "/dev/");
45 if (!root_mounted || filename[0] != '/') {
47 reply_with_error ("root must be mounted and path must be absolute");
52 if (!is_dev) CHROOT_IN;
53 fd = open (filename, O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666);
54 if (!is_dev) CHROOT_OUT;
59 reply_with_perror ("%s", filename);
63 r = receive_file (write_cb, &fd);
64 if (r == -1) { /* write error */
68 reply_with_error ("write error: %s", filename);
72 if (r == -2) { /* cancellation from library */
74 /* Do NOT send any error. */
78 if (close (fd) == -1) {
80 if (r == -1) /* if r == 0, file transfer ended already */
83 reply_with_perror ("close: %s", filename);
90 /* Has one FileOut parameter. */
92 do_download (const char *filename)
95 char buf[GUESTFS_MAX_CHUNK_SIZE];
97 is_dev = STRPREFIX (filename, "/dev/");
99 if (!is_dev) CHROOT_IN;
100 fd = open (filename, O_RDONLY);
101 if (!is_dev) CHROOT_OUT;
103 reply_with_perror ("%s", filename);
107 /* Now we must send the reply message, before the file contents. After
108 * this there is no opportunity in the protocol to send any error
109 * message back. Instead we can only cancel the transfer.
113 while ((r = read (fd, buf, sizeof buf)) > 0) {
114 if (send_file_write (buf, r) < 0) {
122 send_file_end (1); /* Cancel. */
127 if (close (fd) == -1) {
129 send_file_end (1); /* Cancel. */
133 if (send_file_end (0)) /* Normal end of file. */