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
|
/* 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)
{
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;
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] = ' ';
curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
sprintf(status, "/proc/%d/cmdline", pid);
if(save_user_arg0) {
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:
*/
|
