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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <limits.h>
#include "Pcontrol.h"
/*
* These several routines simply get the indicated /proc structures
* for a process identified by process ID. They are convenience
* functions for one-time operations. They do the mechanics of
* open() / read() / close() of the necessary /proc files so the
* caller's code can look relatively less cluttered.
*/
/*
* 'ngroups' is the number of supplementary group entries allocated in
* the caller's cred structure. It should equal zero or one unless extra
* space has been allocated for the group list by the caller, like this:
* credp = malloc(sizeof (prcred_t) + (ngroups - 1) * sizeof (gid_t));
*/
int
proc_get_cred(pid_t pid, prcred_t *credp, int ngroups)
{
char fname[PATH_MAX];
int fd;
int rv = -1;
ssize_t minsize = sizeof (*credp) - sizeof (gid_t);
size_t size = minsize + ngroups * sizeof (gid_t);
(void) snprintf(fname, sizeof (fname), "%s/%d/cred",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) >= 0) {
if (read(fd, credp, size) >= minsize)
rv = 0;
(void) close(fd);
}
return (rv);
}
/*
* Malloc and return a properly sized structure.
*/
prpriv_t *
proc_get_priv(pid_t pid)
{
char fname[PATH_MAX];
int fd;
struct stat statb;
prpriv_t *rv = NULL;
(void) snprintf(fname, sizeof (fname), "%s/%d/priv",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) >= 0) {
if (fstat(fd, &statb) != 0 ||
(rv = malloc(statb.st_size)) == NULL ||
read(fd, rv, statb.st_size) != statb.st_size) {
free(rv);
rv = NULL;
}
(void) close(fd);
}
return (rv);
}
#if defined(__i386) || defined(__amd64)
/*
* Fill in a pointer to a process LDT structure.
* The caller provides a buffer of size 'nldt * sizeof (struct ssd)';
* If pldt == NULL or nldt == 0, we return the number of existing LDT entries.
* Otherwise we return the actual number of LDT entries fetched (<= nldt).
*/
int
proc_get_ldt(pid_t pid, struct ssd *pldt, int nldt)
{
char fname[PATH_MAX];
int fd;
struct stat statb;
size_t size;
ssize_t ssize;
(void) snprintf(fname, sizeof (fname), "%s/%d/ldt",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) < 0)
return (-1);
if (pldt == NULL || nldt == 0) {
nldt = 0;
if (fstat(fd, &statb) == 0)
nldt = statb.st_size / sizeof (struct ssd);
(void) close(fd);
return (nldt);
}
size = nldt * sizeof (struct ssd);
if ((ssize = read(fd, pldt, size)) < 0)
nldt = -1;
else
nldt = ssize / sizeof (struct ssd);
(void) close(fd);
return (nldt);
}
#endif /* __i386 || __amd64 */
int
proc_get_psinfo(pid_t pid, psinfo_t *psp)
{
char fname[PATH_MAX];
int fd;
int rv = -1;
(void) snprintf(fname, sizeof (fname), "%s/%d/psinfo",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) >= 0) {
if (read(fd, psp, sizeof (*psp)) == sizeof (*psp))
rv = 0;
(void) close(fd);
}
return (rv);
}
int
proc_get_status(pid_t pid, pstatus_t *psp)
{
char fname[PATH_MAX];
int fd;
int rv = -1;
(void) snprintf(fname, sizeof (fname), "%s/%d/status",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) >= 0) {
if (read(fd, psp, sizeof (*psp)) == sizeof (*psp))
rv = 0;
(void) close(fd);
}
return (rv);
}
/*
* Get the process's aux vector.
* 'naux' is the number of aux entries in the caller's buffer.
* We return the number of aux entries actually fetched from
* the process (less than or equal to 'naux') or -1 on failure.
*/
int
proc_get_auxv(pid_t pid, auxv_t *pauxv, int naux)
{
char fname[PATH_MAX];
int fd;
int rv = -1;
(void) snprintf(fname, sizeof (fname), "%s/%d/auxv",
procfs_path, (int)pid);
if ((fd = open(fname, O_RDONLY)) >= 0) {
if ((rv = read(fd, pauxv, naux * sizeof (auxv_t))) >= 0)
rv /= sizeof (auxv_t);
(void) close(fd);
}
return (rv);
}
|
