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
|
/* 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 <string.h>
#include "actions.h"
#include "daemon.h"
char *
do_echo_daemon (char *const *argv)
{
char *out = NULL;
size_t out_len = 0;
/* Iterate over argv entries until reaching the NULL terminator */
while (*argv) {
char add_space = 0;
/* Store the end of current output */
size_t out_end = out_len;
/* Calculate the new output size */
size_t arg_len = strlen(*argv);
out_len += arg_len;
/* We will prepend a space if this isn't the first argument added */
if (NULL != out) {
out_len++;
add_space = 1;
}
/* Make the output buffer big enough for the string and its terminator */
char *out_new = realloc (out, out_len + 1);
if (NULL == out_new) {
reply_with_perror ("realloc");
free(out);
return 0;
}
out = out_new;
/* Prepend a space if required */
if (add_space) {
out[out_end++] = ' ';
}
/* Copy the argument to the output */
memcpy(&out[out_end], *argv, arg_len);
argv++;
}
/* NULL terminate the output */
out[out_len] = '\0';
return out;
}
|
