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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop 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.
LibGTop 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 LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/sysdeps.h>
#include <glibtop/open.h>
#include <glibtop/parameter.h>
#include <glibtop/init_hooks.h>
#include <glibtop/machine.h>
#ifndef DEFAULT_PORT
#define DEFAULT_PORT 42800
#endif
static glibtop _glibtop_global_server;
glibtop *glibtop_global_server = &_glibtop_global_server;
static void
_init_server (glibtop *server, const unsigned features)
{
char *command, *temp;
/* Try to get server command, but don't override if already
* set via glibtop_set_parameter () */
if (server->server_command == NULL) {
const char *temp = getenv ("LIBGTOP_SERVER") ?
getenv ("LIBGTOP_SERVER") : LIBGTOP_SERVER;
server->server_command = g_strdup (temp);
}
if (server->server_rsh == NULL) {
const char *temp = getenv ("LIBGTOP_RSH") ?
getenv ("LIBGTOP_RSH") : "/usr/bin/ssh";
server->server_rsh = g_strdup (temp);
}
/* Try to get server method, but don't override if already
* set via glibtop_set_parameter () */
if (server->method) return;
/* If server->command doesn't start with a colon, then it is
* the full pathname of the server executable. */
if (server->server_command [0] != ':') {
if (features & glibtop_server_features) {
/* We really need the server. */
server->method = GLIBTOP_METHOD_PIPE;
} else {
/* Fine. No server is needed, so we call the
* sysdeps functions directly. */
server->method = GLIBTOP_METHOD_DIRECT;
}
return;
}
/* If the first character of 'server_command' is a colon,
* the first field is the method to connect to the server. */
/* Everything up to the next colon is the method. */
command = g_strdup (server->server_command+1);
temp = strstr (command, ":");
if (temp) *temp = 0;
/* Dispatch method. */
if (!strcmp (command, "direct")) {
/* Use sysdeps dir instead of connecting to server
* even if using the server would be required on
* the current system. */
server->method = GLIBTOP_METHOD_DIRECT;
} else if (!strcmp (command, "inet")) {
server->method = GLIBTOP_METHOD_INET;
/* Connect to internet server. */
if (temp == NULL) {
/* If no value was set, we use 'localhost'. */
if (server->server_host == NULL)
server->server_host = g_strdup ("localhost");
} else {
char *temp2 = strstr (temp+1, ":");
if (temp2) *temp2 = 0;
/* Override default. */
if (server->server_host)
g_free ((char *) server->server_host);
server->server_host = g_strdup (temp+1);
temp = temp2;
}
if (temp == NULL) {
/* If no value was set, we use DEFAULT_PORT. */
if (server->server_port == 0)
server->server_port = DEFAULT_PORT;
} else {
char *temp2 = strstr (temp+1, ":");
if (temp2) *temp2 = 0;
if (sscanf (temp+1, "%ld", &server->server_port) != 1)
server->server_port = DEFAULT_PORT;
temp = temp2 ? temp2 + 1 : temp2;
}
} else if (!strcmp (command, "unix")) {
/* Connect to unix domain socket. */
server->method = GLIBTOP_METHOD_UNIX;
} else if (!strcmp (command, "pipe")) {
/* Open pipe to server. */
server->method = GLIBTOP_METHOD_PIPE;
server->server_command = g_strdup(LIBGTOP_SERVER);
} else {
glibtop_error_r (server, "Unknown server method '%s'",
server->server_command+1);
}
g_free (command);
}
glibtop *
glibtop_init_r (glibtop **server_ptr, unsigned long features, unsigned flags)
{
glibtop *server;
if (server_ptr == NULL)
return NULL;
if (*server_ptr == NULL)
*server_ptr = glibtop_global_server;
server = *server_ptr;
/* Should we do the initialization? */
if (flags & GLIBTOP_INIT_NO_INIT)
return server;
/* Do the initialization, but only if not already initialized. */
if ((server->flags & _GLIBTOP_INIT_STATE_INIT) == 0) {
glibtop_machine_new (server);
if (flags & GLIBTOP_FEATURES_EXCEPT)
features = ~features & GLIBTOP_SYSDEPS_ALL;
if (features == 0)
features = GLIBTOP_SYSDEPS_ALL;
if (flags & GLIBTOP_FEATURES_NO_SERVER) {
server->method = GLIBTOP_METHOD_DIRECT;
features = 0;
}
server->features = features;
_init_server (server, features);
server->flags |= _GLIBTOP_INIT_STATE_INIT;
switch (server->method) {
case GLIBTOP_METHOD_PIPE:
case GLIBTOP_METHOD_UNIX:
if (glibtop_server_features & features)
break;
server->method = GLIBTOP_METHOD_DIRECT;
break;
}
}
/* Should we open the server? */
if (flags & GLIBTOP_INIT_NO_OPEN)
return server;
/* Open server, but only if not already opened. */
if ((server->flags & _GLIBTOP_INIT_STATE_OPEN) == 0)
glibtop_open_l (server, "glibtop",
features, flags);
return server;
}
glibtop *
glibtop_init_s (glibtop **server_ptr, unsigned long features, unsigned flags)
{
glibtop *server;
const _glibtop_init_func_t *init_fkt;
glibtop_debug("init_s with features=%#0lx and flags=%#0x", features, flags);
if (server_ptr == NULL)
return NULL;
if (*server_ptr == NULL)
*server_ptr = glibtop_global_server;
server = *server_ptr;
/* Should we do the initialization? */
if (flags & GLIBTOP_INIT_NO_INIT)
return server;
/* Do the initialization, but only if not already initialized. */
if ((server->flags & _GLIBTOP_INIT_STATE_SYSDEPS) == 0) {
glibtop_open_s (server, "glibtop", features, flags);
for (init_fkt = _glibtop_init_hook_s; *init_fkt; init_fkt++)
(*init_fkt) (server);
server->flags |= _GLIBTOP_INIT_STATE_SYSDEPS;
}
return server;
}
|
