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
|
/*
This file is part of LibGTop 2.0.
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 <unistd.h>
#include <glibtop.h>
#include <glibtop/error.h>
#include <glibtop/procargs.h>
#include <glibtop_suid.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <limits.h>
static const unsigned long _glibtop_sysdeps_proc_args =
(1L << GLIBTOP_PROC_ARGS_SIZE);
/* Init function. */
void
_glibtop_init_proc_args_p (glibtop *server)
{
server->sysdeps.proc_args = _glibtop_sysdeps_proc_args;
}
/* Provides detailed information about a process. */
char *
glibtop_get_proc_args_p (glibtop *server, glibtop_proc_args *buf,
pid_t pid, unsigned max_len)
{
char argbuf[4096];
char *start, *end, *str;
size_t bufsize = 4096;
int mib [3];
unsigned length;
char *args;
int *ip;
glibtop_init_p (server, (1 << GLIBTOP_SYSDEPS_PROC_ARGS), 0);
memset (buf, 0, sizeof (glibtop_proc_args));
mib [0] = CTL_KERN;
mib [1] = KERN_PROCARGS;
mib [2] = pid;
/* !!! THE FOLLOWING CODE RUNS SUID ROOT - CHANGE WITH CAUTION !!! */
glibtop_suid_enter (server);
if (sysctl (mib, 3, argbuf, &bufsize, NULL, 0) < 0) {
glibtop_suid_leave (server);
return NULL;
}
glibtop_suid_leave (server);
/* !!! END OF SUID ROOT PART !!! */
end = &argbuf[bufsize];
ip = (int *)end - 2;
while (*--ip) {
if (ip == (int *)argbuf) {
return NULL;
}
}
start = (char *)(ip + 1);
while (*--ip) {
if (ip == (int *)argbuf) {
return NULL;
}
}
ip++;
if ((ip[0] & 0xbfff0000) == 0xbfff0000) {
ip += 2;
start = (char*)(ip + (strlen ((char*)ip) + 3) / 4);
while (!*start)
start++;
}
for (str = start + strlen (start); str < end - 1; str++) {
if (*str == '=') {
while (*str != '\0' && str > start)
str--;
break;
}
}
end = str;
if (start[0] == '-' || start[0] == '?' || start[0] <= ' ') {
return NULL;
}
length = end - start;
if (max_len != 0 && length > max_len)
length = max_len;
args = g_malloc(length + 1);
if (args == NULL) {
glibtop_warn_io_r (server, "malloc(procargs)");
return NULL;
}
memcpy (args, start, length);
args [length] = '\0';
buf->size = length;
buf->flags = _glibtop_sysdeps_proc_args;
return args;
}
|
