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
257
258
|
/* $Id$ */
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the Gnome Top Library.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
The Gnome Top Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Top Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <glibtop/command.h>
#include <glibtop/version.h>
#include <glibtop/xmalloc.h>
#include <glibtop/union.h>
#include <glibtop/open.h>
#include <fcntl.h>
#if defined(HAVE_GETDTABLESIZE)
#define GET_MAX_FDS() getdtablesize()
#else
/* Fallthrough case - please add other #elif cases above
for different OS's as necessary */
#define GET_MAX_FDS() 256
#endif
int main(int argc, char *argv[])
{
pid_t pid;
int fd, max_fd, nread;
size_t size, dsize;
char parameter [BUFSIZ];
glibtop_union data;
glibtop_command cmnd;
glibtop_sysdeps sysdeps;
glibtop server;
void *ptr;
/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
int uid, euid, gid, egid;
uid = getuid (); euid = geteuid ();
gid = getgid (); egid = getegid ();
if (setreuid (euid, uid)) _exit (1);
if (setregid (egid, gid)) _exit (1);
/* !!! END OF SUID ROOT PART !!! */
/* For security reasons, we temporarily drop our priviledges
* before doing the gettext stuff. */
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, GTOPLOCALEDIR);
textdomain (PACKAGE);
glibtop_version ();
/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
setreuid (uid, euid); setreuid (gid, egid);
glibtop_open (&server, argv [0]);
if (setreuid (euid, uid)) _exit (1);
if (setregid (egid, gid)) _exit (1);
/* !!! END OF SUID ROOT PART !!! */
/* close all file descriptors except ones used by the pipes (0 and 1). */
max_fd = GET_MAX_FDS();
for(fd = 3 /* The first fd after the pipes */; fd < max_fd; fd++)
close(fd);
while(1) {
/* block on read from client */
/* fprintf (stderr, "waiting for input ...\n"); */
nread = read (0, &size, sizeof (size_t));
/* will return 0 if parent exits. */
if (nread == 0)
_exit(0);
if (nread != sizeof (size_t))
_exit(1);
if (size != sizeof (glibtop_command))
_exit(2);
nread = read (0, &cmnd, size);
/* will return 0 if parent exits. */
if (nread == 0)
_exit(0);
if (nread < 0)
_exit(1);
nread = read (0, &dsize, sizeof (size_t));
/* will return 0 if parent exits. */
if (nread == 0)
_exit(0);
if (nread < 0)
_exit(1);
if (dsize >= BUFSIZ)
_exit(3);
memset (parameter, 0, sizeof (parameter));
if (dsize) {
nread = read (0, parameter, dsize);
/* will return 0 if parent exits. */
if (nread == 0)
_exit(0);
if (nread < 0)
_exit(1);
}
switch (cmnd.command) {
case GLIBTOP_CMND_SYSDEPS:
glibtop_get_sysdeps__r (&server, &sysdeps);
glibtop_output (sizeof (glibtop_sysdeps), &sysdeps);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_CPU:
glibtop_get_cpu__r (&server, &data.cpu);
glibtop_output (sizeof (glibtop_cpu), &data.cpu);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_MEM:
glibtop_get_mem__r (&server, &data.mem);
glibtop_output (sizeof (glibtop_mem), &data.mem);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_SWAP:
glibtop_get_swap__r (&server, &data.swap);
glibtop_output (sizeof (glibtop_swap), &data.swap);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_UPTIME:
glibtop_get_uptime__r (&server, &data.uptime);
glibtop_output (sizeof (glibtop_uptime), &data.uptime);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_LOADAVG:
glibtop_get_loadavg__r (&server, &data.loadavg);
glibtop_output (sizeof (glibtop_loadavg), &data.loadavg);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_SHM_LIMITS:
glibtop_get_shm_limits__r (&server, &data.shm_limits);
glibtop_output (sizeof (glibtop_shm_limits),
&data.shm_limits);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_MSG_LIMITS:
glibtop_get_msg_limits__r (&server, &data.msg_limits);
glibtop_output (sizeof (glibtop_msg_limits),
&data.msg_limits);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_SEM_LIMITS:
glibtop_get_sem_limits__r (&server, &data.sem_limits);
glibtop_output (sizeof (glibtop_sem_limits),
&data.sem_limits);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROCLIST:
ptr = glibtop_get_proclist__r (&server, &data.proclist);
glibtop_output (sizeof (glibtop_proclist),
&data.proclist);
glibtop_output (data.proclist.total, ptr);
glibtop_free__r (&server, ptr);
break;
case GLIBTOP_CMND_PROC_STATE:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_state__r
(&server, &data.proc_state, pid);
glibtop_output (sizeof (glibtop_proc_state),
&data.proc_state);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_UID:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_uid__r
(&server, &data.proc_uid, pid);
glibtop_output (sizeof (glibtop_proc_uid),
&data.proc_uid);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_MEM:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_mem__r
(&server, &data.proc_mem, pid);
glibtop_output (sizeof (glibtop_proc_mem),
&data.proc_mem);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_TIME:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_time__r
(&server, &data.proc_time, pid);
glibtop_output (sizeof (glibtop_proc_time),
&data.proc_time);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_SIGNAL:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_signal__r
(&server, &data.proc_signal, pid);
glibtop_output (sizeof (glibtop_proc_signal),
&data.proc_signal);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_KERNEL:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_kernel__r
(&server, &data.proc_kernel, pid);
glibtop_output (sizeof (glibtop_proc_kernel),
&data.proc_kernel);
glibtop_output (0, NULL);
break;
case GLIBTOP_CMND_PROC_SEGMENT:
memcpy (&pid, parameter, sizeof (pid_t));
glibtop_get_proc_segment__r
(&server, &data.proc_segment, pid);
glibtop_output (sizeof (glibtop_proc_segment),
&data.proc_segment);
glibtop_output (0, NULL);
break;
}
}
_exit(0);
}
|
