1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/* 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, int 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;
NEED_ROOT_OR_IS_DEVICE (filename, -1);
is_dev = strncmp (filename, "/dev/", 5) == 0;
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;
cancel_receive ();
errno = err;
reply_with_perror ("%s", filename);
return -1;
}
r = receive_file (write_cb, &fd);
if (r == -1) { /* write error */
err = errno;
cancel_receive ();
errno = err;
reply_with_perror ("write: %s", filename);
return -1;
}
if (r == -2) { /* cancellation from library */
close (fd);
/* Do NOT send any error. */
return -1;
}
if (close (fd) == -1) {
err = errno;
cancel_receive ();
errno = err;
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];
NEED_ROOT_OR_IS_DEVICE (filename, -1);
is_dev = strncmp (filename, "/dev/", 5) == 0;
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)
return -1;
}
if (r == -1) {
perror (filename);
send_file_end (1); /* Cancel. */
return -1;
}
if (close (fd) == -1) {
perror (filename);
send_file_end (1); /* Cancel. */
return -1;
}
send_file_end (0); /* Normal end of file. */
return 0;
}
|
