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
|
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright 1998 by Albert Cahalan; all rights reserved.
* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
* GNU Library General Public License Version 2, or any later version
*
*/
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <asm/page.h>
#include "libbb.h"
extern procps_status_t * procps_scan(int save_user_arg0
#ifdef CONFIG_SELINUX
, int use_selinux , security_id_t *sid
#endif
)
{
static DIR *dir;
struct dirent *entry;
static procps_status_t ret_status;
char *name;
int n;
char status[32];
char buf[1024];
FILE *fp;
procps_status_t curstatus;
int pid;
long tasknice;
struct stat sb;
if (!dir) {
dir = opendir("/proc");
if(!dir)
bb_error_msg_and_die("Can't open /proc");
}
for(;;) {
if((entry = readdir(dir)) == NULL) {
closedir(dir);
dir = 0;
return 0;
}
name = entry->d_name;
if (!(*name >= '0' && *name <= '9'))
continue;
memset(&curstatus, 0, sizeof(procps_status_t));
pid = atoi(name);
curstatus.pid = pid;
sprintf(status, "/proc/%d/stat", pid);
if((fp = fopen(status, "r")) == NULL)
continue;
#ifdef CONFIG_SELINUX
if(use_selinux)
{
if(fstat_secure(fileno(fp), &sb, sid))
continue;
}
else
#endif
if(fstat(fileno(fp), &sb))
continue;
my_getpwuid(curstatus.user, sb.st_uid);
name = fgets(buf, sizeof(buf), fp);
fclose(fp);
if(name == NULL)
continue;
name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
if(name == 0 || name[1] != ' ')
continue;
*name = 0;
sscanf(buf, "%*s (%15c", curstatus.short_cmd);
n = sscanf(name+2,
"%c %d "
"%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */
"%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
"%lu %lu "
#else
"%*s %*s "
#endif
"%*s %*s %*s " /* cutime, cstime, priority */
"%ld "
"%*s %*s %*s " /* timeout, it_real_value, start_time */
"%*s " /* vsize */
"%ld",
curstatus.state, &curstatus.ppid,
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
&curstatus.utime, &curstatus.stime,
#endif
&tasknice,
&curstatus.rss);
#ifdef FEATURE_CPU_USAGE_PERCENTAGE
if(n != 6)
#else
if(n != 4)
#endif
continue;
if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
curstatus.state[1] = 'W';
else
curstatus.state[1] = ' ';
if (tasknice < 0)
curstatus.state[2] = '<';
else if (tasknice > 0)
curstatus.state[2] = 'N';
else
curstatus.state[2] = ' ';
#ifdef PAGE_SHIFT
curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
#else
curstatus.rss *= (getpagesize() >> 10); /* 2**10 = 1kb */
#endif
if(save_user_arg0) {
sprintf(status, "/proc/%d/cmdline", pid);
if((fp = fopen(status, "r")) == NULL)
continue;
if((n=fread(buf, 1, sizeof(buf)-1, fp)) > 0) {
if(buf[n-1]=='\n')
buf[--n] = 0;
name = buf;
while(n) {
if(((unsigned char)*name) < ' ')
*name = ' ';
name++;
n--;
}
*name = 0;
if(buf[0])
curstatus.cmd = strdup(buf);
/* if NULL it work true also */
}
fclose(fp);
}
return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));
}
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
