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
|
/* $Id$ */
/* 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop/proclist.h>
#include "safeio.h"
#include "glibtop_private.h"
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <ctype.h>
#define GLIBTOP_PROCLIST_FLAGS 3
static const unsigned long _glibtop_sysdeps_proclist =
(1L << GLIBTOP_PROCLIST_TOTAL) + (1L << GLIBTOP_PROCLIST_NUMBER) +
(1L << GLIBTOP_PROCLIST_SIZE);
/* Init function. */
void
glibtop_init_proclist_s (glibtop *server)
{
server->sysdeps.proclist = _glibtop_sysdeps_proclist;
}
#define BLOCK_COUNT 256
#define BLOCK_SIZE (BLOCK_COUNT * sizeof (unsigned))
/* Fetch list of currently running processes.
*
* IMPORTANT NOTE:
* On error, this function MUST return NULL and set buf->flags to zero !
* On success, it returnes a pointer to a list of buf->number elements
* each buf->size big. The total size is stored in buf->total. */
unsigned *
glibtop_get_proclist_s (glibtop *server, glibtop_proclist *buf,
gint64 which, gint64 arg)
{
DIR *proc;
struct dirent *entry;
char buffer [BUFSIZ];
unsigned count, total, pid = 0, mask;
unsigned pids [BLOCK_COUNT], *pids_chain = NULL;
unsigned pids_size = 0, pids_offset = 0, new_size;
struct stat statb;
int len, ok;
memset (buf, 0, sizeof (glibtop_proclist));
mask = which & ~GLIBTOP_KERN_PROC_MASK;
which &= GLIBTOP_KERN_PROC_MASK;
/* Check if the user wanted only one process */
if(which == GLIBTOP_KERN_PROC_PID)
{
if(mask)
{
#ifdef HAVE_PROCFS_H
struct psinfo psinfo;
#else
struct prpsinfo psinfo;
#endif
if(glibtop_get_proc_data_psinfo_s(server, &psinfo, pid))
return NULL;
if(mask & GLIBTOP_EXCLUDE_IDLE && !psinfo.pr_pctcpu)
return NULL;
if(mask & GLIBTOP_EXCLUDE_SYSTEM && psinfo.pr_flag & SSYS)
return NULL;
if(mask & GLIBTOP_EXCLUDE_NOTTY && psinfo.pr_ttydev == PRNODEV)
return NULL;
}
else
{
sprintf(buffer, "/proc/%lld", arg);
if(s_stat(buffer, &statb) < 0)
return NULL;
}
pids_chain = g_malloc(sizeof(unsigned));
*pids_chain = pid;
return pids_chain;
}
proc = opendir ("/proc");
if (!proc) return NULL;
/* read every every entry in /proc */
for (count = total = 0, entry = readdir (proc);
entry; entry = readdir (proc)) {
ok = 1; len = strlen (entry->d_name);
/* does it consist entirely of digits? */
/* It does, except for "." and "..". Let's speed up */
if(entry->d_name[0] == '.')
continue;
/* convert it in a number */
pid = (unsigned)atol(entry->d_name);
#ifdef HAVE_PROCFS_H
/* Can we skip it based on the request? We have
RUID and RGID in struct stat. But we can't do it
like this for LP64 process, because stat() will fail.
XXX Unimplemented for now */
if(!mask && which == GLIBTOP_KERN_PROC_RUID)
{
sprintf (buffer, "/proc/%d", pid);
if (s_stat (buffer, &statb)) continue;
if (!S_ISDIR (statb.st_mode)) continue;
if(statb.st_uid != arg) continue;
}
if(mask || which != GLIBTOP_KERN_PROC_ALL)
{
struct psinfo psinfo;
if(glibtop_get_proc_data_psinfo_s(server, &psinfo, pid))
continue;
if(mask)
{
if(mask & GLIBTOP_EXCLUDE_IDLE && !psinfo.pr_pctcpu)
continue;
if(mask & GLIBTOP_EXCLUDE_SYSTEM && psinfo.pr_flag & SSYS)
continue;
if(mask & GLIBTOP_EXCLUDE_NOTTY
&& psinfo.pr_ttydev == PRNODEV)
continue;
}
switch(which)
{
case GLIBTOP_KERN_PROC_PGRP: if(psinfo.pr_pgid != arg)
continue;
break;
case GLIBTOP_KERN_PROC_SESSION: if(psinfo.pr_sid != arg)
continue;
break;
case GLIBTOP_KERN_PROC_TTY: if(psinfo.pr_ttydev != arg)
continue;
break;
case GLIBTOP_KERN_PROC_UID: if(psinfo.pr_euid != arg)
continue;
break;
case GLIBTOP_KERN_PROC_RUID: if(psinfo.pr_uid != arg)
continue;
break;
default: break;
}
}
#endif
/* Fine. Now we first try to store it in pids. If this buffer is
* full, we copy it to the pids_chain. */
if (count >= BLOCK_COUNT) {
/* The following call to g_realloc will be
* equivalent to g_malloc () if `pids_chain' is
* NULL. We just calculate the new size and copy `pids'
* to the beginning of the newly allocated block. */
new_size = pids_size + BLOCK_SIZE;
pids_chain = g_realloc (pids_chain, new_size);
memcpy (pids_chain + pids_offset, pids, BLOCK_SIZE);
pids_size = new_size;
pids_offset += BLOCK_COUNT;
count = 0;
}
/* pids is now big enough to hold at least one single pid. */
pids [count++] = pid;
total++;
}
s_closedir (proc);
/* count is only zero if an error occured (one a running Linux system,
* we have at least one single process). */
if (!count) return NULL;
/* The following call to g_realloc will be equivalent to
* g_malloc if pids_chain is NULL. We just calculate the
* new size and copy pids to the beginning of the newly allocated
* block. */
new_size = pids_size + count * sizeof (unsigned);
pids_chain = g_realloc (pids_chain, new_size);
memcpy (pids_chain + pids_offset, pids, count * sizeof (unsigned));
pids_size = new_size;
pids_offset += BLOCK_COUNT;
/* Since everything is ok now, we can set buf->flags, fill in the
* remaining fields and return the `pids_chain'. */
buf->flags = _glibtop_sysdeps_proclist;
buf->size = sizeof (unsigned);
buf->number = total;
buf->total = total * sizeof (unsigned);
return pids_chain;
}
|
