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
|
/* Metacity UI Slave Messages */
/*
* Copyright (C) 2001 Havoc Pennington
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include "messages.h"
#include "main.h"
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <config.h>
typedef enum
{
READ_FAILED = 0, /* FALSE */
READ_OK,
READ_EOF
} ReadResult;
static ReadResult read_data (GString *str,
gint fd);
static void send_message (MetaMessage *message);
void
meta_message_send_check (void)
{
MetaMessageCheck check;
memset (&check, 0, sizeof (check));
check.header.message_code = MetaMessageCheckCode;
check.header.length = sizeof (check);
strcpy (check.metacity_version, VERSION);
strcpy (check.host_alias, HOST_ALIAS);
check.metacity_version[META_MESSAGE_MAX_VERSION_LEN] = '\0';
check.host_alias[META_MESSAGE_MAX_HOST_ALIAS_LEN] = '\0';
check.messages_version = META_MESSAGES_VERSION;
send_message ((MetaMessage*)&check);
}
static int
write_bytes (void *buf, int bytes)
{
const char *p;
p = (char*) buf;
while (bytes > 0)
{
int written;
written = write (1, p, bytes);
if (written < 0)
return -1;
bytes -= written;
p += written;
}
return 0;
}
static void
send_message (MetaMessage *message)
{
/* Not much point checking for errors here. We can't
* really report them anyway.
*/
write_bytes (META_MESSAGE_ESCAPE, META_MESSAGE_ESCAPE_LEN);
write_bytes (message, message->header.length);
}
static ReadResult
read_data (GString *str,
gint fd)
{
gint bytes;
gchar buf[4096];
again:
bytes = read (fd, &buf, 4096);
if (bytes == 0)
return READ_EOF;
else if (bytes > 0)
{
g_string_append_len (str, buf, bytes);
return READ_OK;
}
else if (bytes < 0 && errno == EINTR)
goto again;
else if (bytes < 0)
{
meta_ui_warning (_("Failed to read data from window manager (%s)\n"),
g_strerror (errno));
return READ_FAILED;
}
else
return READ_OK;
}
|
