分享一下自己做的一个获取Linux系统状态的类（c++）
使用方式：声明一个该类的变量（即实例化），用实例调用相关接口即可。
头文件:
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#ifndef LINUXSERVERSTATE_H
#define LINUXSERVERSTATE_H
#include <sys/types.h>
#include <unistd.h>
#include <string>
#include <vector>
#include <pthread.h>
namespace
LINUXSERV_STATE
{
#pragma pack(push)
#pragma pack(8)
struct
SysMemInfo
{
unsigned
long
total;
//单位：M
unsigned
long
free
;
//单位：M
};
struct
SysDiskInfo
{
std::string name;
//sda1,sad2等等
unsigned
long
total;
//单位：M，不包括交换分区、CDROM等
unsigned
long
free
;
//单位：M
};
struct
SysNetInfo
{
float
send;
//kb
float
recv;
//kb
float
total;
//kb
};
struct
SysProcInfo
{
std::string name;
//进程名字
int
pid;
//进程id
int
cpu;
//cpu使用率
long
mem;
//内存使用，单位Kb，linux内存指的是vmrss，即程序正在使用的物理内存，-1表示未获取到或获取错误
};
struct
SysProcTimeInfo
{
unsigned
long
user;
//进程在用户态执行的时间
unsigned
long
kernel;
//进程在内核态执行的时间
};
//linux src目录中的include/net/tcp_states.h，source目录一般位于/usr/src/linux＊目录中
enum
SysNetState{
TCP_ESTABLISHED = 1,
TCP_SYN_SENT,
TCP_SYN_RECV,
TCP_FIN_WAIT1,
TCP_FIN_WAIT2,
TCP_TIME_WAIT,
TCP_CLOSE,
TCP_CLOSE_WAIT,
TCP_LAST_ACK,
TCP_LISTEN,
TCP_CLOSING,
/* Now a valid state */
TCP_MAX_STATES
/* Leave at the end! */
};
enum
SockType{UNKNOWN=0,TCP , UDP, TCP6, UDP6};
struct
SysNetConnInfo
{
int
id;
SockType protocol;
std::string localAddr;
int
localPort;
std::string remoteAddr;
int
remotePort;
SysNetState state;
};
#pragma pack(pop)
void
* CPUNetProcessCount(
void
* arg);
class
LinuxServerState
{
public
:
LinuxServerState();
virtual
~LinuxServerState();
int
GetMemInfo(SysMemInfo& memInfo);
int
GetDiskInfo(std::vector<SysDiskInfo>& diskInfo,unsigned
long
&total,unsigned
long
&available);
//返回cpu的利用率，返回－1表示超时或者其他错误
int
GetCpuUsage();
//sys net info
SysNetInfo GetNetInfo();
//process info
void
GetProcInfo(std::vector<SysProcInfo>& procInfo);
//net connection info
void
GetNetConnectionInfo(std::vector<SysNetConnInfo>& netConnInfo);
private
:
void
initialize();
friend
void
* CPUNetProcessCount(
void
* arg);
int
m_cpuUsage;
//多个CPU的总的使用率
pthread_mutex_t m_mutex;
SysNetInfo m_netInfo;
pthread_t m_countThread;
std::vector<SysProcInfo> m_procInfo;
void
* m_threadRet;
LinuxServerState(
const
LinuxServerState& other);
virtual
LinuxServerState& operator=(
const
LinuxServerState& other);
virtual
bool
operator==(
const
LinuxServerState& other)
const
;
};
}
#endif // LINUXSERVERSTATE_H
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源文件:
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#include "linuxserverstate.h"
#include <sys/sysinfo.h>//getmemInfo
#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <climits>
#include <cstring>
#include <time.h>
#include <dirent.h>
#include <map>
#include <errno.h>
#include <iostream>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
using
namespace
std;
namespace
LINUXSERV_STATE
{
void
* CPUNetProcessCount(
void
* arg)
{
LinuxServerState* pMain = (LinuxServerState*)arg;
//get all cpu usage
unsigned
long
cpuTime, idleTime;
unsigned
long
userT = 0, niceT = 0, systemT = 0, idleT = 0, ioT = 0, irqT = 0, softirqT = 0;
char
cpubuf[8] = {
'\0'
};
fstream fProcStat(
"/proc/stat"
,ios_base::in);
fProcStat>>cpubuf>>userT>>niceT>>systemT>>idleT>>ioT>>irqT>>softirqT;
cpuTime = userT + niceT + systemT + idleT + ioT + irqT + softirqT;
idleTime = idleT;
//get net stat
fstream fProcNetStat(
"/proc/net/netstat"
,ios_base::in);
char
bufNetStat[2048] = {
'\0'
}, ipExt[16] = {
'\0'
};
unsigned
long
inNoRoutes = 0, inTruncPkts = 0, inMcastPkts = 0, outMcastPkts = 0, inBcastPkts = 0, outBcastPkts = 0;
unsigned
long
inOctets = 0, outOctets = 0, inMcastOctets = 0, outMcastOctets = 0, inBcastOctets = 0, outBcastOctets = 0;
time_t
sysTime;
while
(!fProcNetStat.eof())
{
fProcNetStat.getline(bufNetStat,2048);
if
(strncasecmp(bufNetStat,
"tcpext"
,6) == 0)
continue
;
if
(strncasecmp(bufNetStat,
"ipext"
,5) == 0)
{
fProcNetStat.getline(bufNetStat,2048);
sscanf
(bufNetStat,
"%s %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld"
,ipExt,
&inNoRoutes,&inTruncPkts,&inMcastPkts,&outMcastPkts,&inBcastPkts,&outBcastPkts,
&inOctets,&outOctets,&inMcastOctets,&outMcastOctets,&inBcastOctets,&outBcastOctets);
sysTime =
time
(NULL);
break
;
}
}
//initialize proc info
char
dirName[128] = {
'\0'
},tmpbuf[2048] = {
'\0'
};
long
utime, stime;
struct
dirent* ent = NULL;
char
pidBuf[128] = {
'\0'
}, *endptr;
DIR* pDirProc = opendir(
"/proc"
);
map<pid_t,SysProcTimeInfo> procTimeInfo;
if
(pDirProc == NULL)
return
NULL;
while
((ent = readdir(pDirProc))!= NULL)
{
long
pidNum =
strtol
(ent->d_name,&endptr,10);
if
(pidNum == LONG_MAX || pidNum == LONG_MIN || endptr == ent->d_name)
{
continue
;
}
else
{
//初始化时间
fstream fPidStat,fPidMem;
int
i = 0;
SysProcTimeInfo tmpProcTimeInfo;
SysProcInfo tmpProcInfo;
snprintf(dirName,128,
"%s%d%s"
,
"/proc/"
,pidNum,
"/stat"
);
try
{
fPidStat.open(dirName,ios_base::in);
}
catch
(std::exception& e)
{
return
NULL;
}
fPidStat>>tmpbuf;
//获取pid
i++;
fPidStat>>tmpbuf;
//获取进程名字，名字由“（）”包括
i++;
if
(
strlen
(tmpbuf) > 2)
tmpProcInfo.name = string(tmpbuf).substr(1,
strlen
(tmpbuf) -2);
else
continue
;
for
(; i < 14;i++)
fPidStat>>tmpbuf;
//14项表示utime,15项表示stime
fPidStat >> utime;
i++;
fPidStat >> stime;
i++;
tmpProcTimeInfo.user = utime;
tmpProcTimeInfo.kernel = stime;
utime = 0;
stime = 0;
procTimeInfo.insert(pair<pid_t,SysProcTimeInfo>(pidNum,tmpProcTimeInfo));
tmpProcInfo.cpu = 0;
tmpProcInfo.pid = pidNum;
//初始化内存,
char
*pstrtolong;
memset
(dirName,
'\0'
,128);
snprintf(dirName,128,
"%s%d%s"
,
"/proc/"
,pidNum,
"/status"
);
fPidMem.open(dirName,ios_base::in);
while
(!fPidMem.eof())
{
fPidMem >> tmpbuf;
if
(strncasecmp(tmpbuf,
"vmrss"
,5) == 0)
{
fPidMem >> tmpbuf;
unsigned
long
vmrss =
strtol
(tmpbuf,&pstrtolong,10);
if
(vmrss == LONG_MAX || vmrss == LONG_MIN || pstrtolong == tmpbuf)
{
tmpProcInfo.mem = -1;
}
else
tmpProcInfo.mem = vmrss;
if
(0 == pthread_mutex_trylock(&pMain->m_mutex))
{
pMain->m_procInfo.push_back(tmpProcInfo);
pthread_mutex_unlock(&pMain->m_mutex);
}
break
;
}
}
memset
(dirName,
'\0'
,128);
memset
(tmpbuf,
'\0'
,2048);
}
}
closedir(pDirProc);
pDirProc = NULL;
while
(1)
{
sleep(1);
//cpu usage
unsigned
long
cpuTimeNow = 0, idleTimeNow = 0;
int
cpu = 0;
fProcStat.seekg(0,ios_base::beg);
fProcStat>>cpubuf>>userT>>niceT>>systemT>>idleT>>ioT>>irqT>>softirqT;
cpuTimeNow = userT + niceT + systemT + idleT + ioT + irqT + softirqT;
idleTimeNow = idleT;
cpu = 100 - (idleTimeNow - idleTime)*100/(cpuTimeNow - cpuTime);
idleTime = idleTimeNow;
cpuTime = cpuTimeNow;
if
(0 == pthread_mutex_trylock(&pMain->m_mutex))
{
pMain->m_cpuUsage = cpu;
pthread_mutex_unlock(&pMain->m_mutex);
}
//else暂时不处理
//net stat
unsigned
long
inOctetsTmp = 0,outOctetsTmp = 0;
fProcNetStat.seekg(0,ios_base::beg);
time_t
timeNow =
time
(NULL);
while
(!fProcNetStat.eof())
{
fProcNetStat.getline(bufNetStat,2048);
if
(strncasecmp(bufNetStat,
"tcpext"
,6) == 0)
continue
;
if
(strncasecmp(bufNetStat,
"ipext"
,5) == 0)
{
fProcNetStat.getline(bufNetStat,2048);
sscanf
(bufNetStat,
"%s %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld"
,ipExt,
&inNoRoutes,&inTruncPkts,&inMcastPkts,&outMcastPkts,&inBcastPkts,&outBcastPkts,
&inOctetsTmp,&outOctetsTmp,&inMcastOctets,&outMcastOctets,&inBcastOctets,&outBcastOctets);
timeNow =
time
(NULL);
break
;
}
}
SysNetInfo tmpNetInfo;
tmpNetInfo.recv = (inOctetsTmp - inOctets)/1024/(timeNow - sysTime);
tmpNetInfo.send = (outOctetsTmp - outOctets)/1024/(timeNow - sysTime);
tmpNetInfo.total = tmpNetInfo.recv + tmpNetInfo.send;
sysTime = timeNow;
inOctets = inOctetsTmp;
outOctets = outOctetsTmp;
if
(0 == pthread_mutex_trylock(&pMain->m_mutex))
{
pMain->m_netInfo = tmpNetInfo;
pthread_mutex_unlock(&pMain->m_mutex);
}
//proc info
if
(0 == pthread_mutex_trylock(&pMain->m_mutex))
{
pMain->m_procInfo.clear();
pthread_mutex_unlock(&pMain->m_mutex);
}
pDirProc = opendir(
"/proc"
);
while
((ent = readdir(pDirProc))!= NULL)
{
long
pidNum =
strtol
(ent->d_name,&endptr,10);
if
(pidNum == LONG_MAX || pidNum == LONG_MIN || endptr == ent->d_name)
{
continue
;
}
else
{
//初始化时间
fstream fPidStat,fPidMem;
int
i = 0;
snprintf(dirName,128,
"%s%d%s"
,
"/proc/"
,pidNum,
"/stat"
);
fPidStat.open(dirName,ios_base::in);
fPidStat>>tmpbuf;
//获取pid
i++;
fPidStat>>tmpbuf;
//获取进程名字，名字由“（）”包括
i++;
SysProcInfo tmpProcInfo;
if
(
strlen
(tmpbuf) > 2)
tmpProcInfo.name = string(tmpbuf).substr(1,
strlen
(tmpbuf) -2);
else
cout<<
"pid:\t"
<<pidNum<<
"tmpbuf:\t"
<<tmpbuf<<endl;
for
(; i < 14;i++)
{
fPidStat>>tmpbuf;
}
//14项表示utime,15项表示stime
fPidStat >> utime;
fPidStat >> stime;
map<pid_t,SysProcTimeInfo>::iterator it = procTimeInfo.find((pid_t)pidNum);
if
(it == procTimeInfo.end())
{
SysProcTimeInfo tmpProcTimeInfo;
tmpProcTimeInfo.user = utime;
tmpProcTimeInfo.kernel = stime;
procTimeInfo.insert(pair<pid_t,SysProcTimeInfo>(pidNum,tmpProcTimeInfo));
tmpProcInfo.cpu = 0;
}
else
{
tmpProcInfo.cpu = utime + stime - it->second.kernel - it->second.user;
if
(tmpProcInfo.cpu > 100)
tmpProcInfo.cpu = 100;
if
(tmpProcInfo.cpu < 0)
tmpProcInfo.cpu = 0;
it->second.kernel = stime;
it->second.user = utime;
}
utime = 0;
stime = 0;
tmpProcInfo.pid = pidNum;
//获取内存
char
*pstrtolong;
memset
(dirName,
'\0'
,128);
snprintf(dirName,128,
"%s%d%s"
,
"/proc/"
,pidNum,
"/status"
);
fPidMem.open(dirName,ios_base::in);
while
(!fPidMem.eof())
{
fPidMem >> tmpbuf;
if
(strncasecmp(tmpbuf,
"vmrss"
,5) == 0)
{
fPidMem >> tmpbuf;
unsigned
long
vmrss =
strtol
(tmpbuf,&pstrtolong,10);
if
(vmrss == LONG_MAX || vmrss == LONG_MIN || pstrtolong == tmpbuf)
{
tmpProcInfo.mem = -1;
}
else
tmpProcInfo.mem = vmrss;
if
(0 == pthread_mutex_trylock(&pMain->m_mutex))
{
pMain->m_procInfo.push_back(tmpProcInfo);
pthread_mutex_unlock(&pMain->m_mutex);
}
break
;
}
}
memset
(dirName,
'\0'
,128);
memset
(tmpbuf,
'\0'
,2048);
}
}
closedir(pDirProc);
}
//main
return
NULL;
}
LinuxServerState::LinuxServerState()
{
m_cpuUsage = 0;
m_countThread = 0;
m_threadRet = NULL;
m_netInfo.total = 0;
m_netInfo.recv = 0;
m_netInfo.send = 0;
initialize();
}
LinuxServerState::LinuxServerState(
const
LinuxServerState& other)
{
}
LinuxServerState::~LinuxServerState()
{
if
(m_countThread != 0)
pthread_join(m_countThread,NULL);
pthread_mutex_destroy(&m_mutex);
}
LinuxServerState& LinuxServerState::operator=(
const
LinuxServerState& other)
{
return
*
this
;
}
bool
LinuxServerState::operator==(
const
LinuxServerState& other)
const
{
///TODO: return ...;
}
void
LinuxServerState::initialize()
{
//pthread_mutexatt matt;
//pthread_mutexattr_init(&matt);
pthread_mutex_init(&m_mutex,NULL);
pthread_create(&m_countThread,NULL,&CPUNetProcessCount,
this
);
}
int
LinuxServerState::GetCpuUsage()
{
timespec tmp;
tmp.tv_nsec = 0;
tmp.tv_sec = 1;
int
cpu = 0;
if
(0 == pthread_mutex_timedlock(&m_mutex,&tmp))
{
cpu = m_cpuUsage;
pthread_mutex_unlock(&m_mutex);
}
else
return
-1;
if
(cpu > 100)
return
100;
if
(cpu < 0)
return
0;
return
cpu;
}
int
LinuxServerState::GetMemInfo(SysMemInfo& memInfo)
{
struct
sysinfo tmp;
int
ret = 0;
ret = sysinfo(&tmp);
if
(ret == 0)
{
memInfo.
free
= (unsigned
long
)tmp.freeram/(1024*1024);
memInfo.total = (unsigned
long
)tmp.totalram/(1024*1024);
}
return
ret;
}
int
LinuxServerState::GetDiskInfo(std::vector<SysDiskInfo>& diskInfo,unsigned
long
&total,unsigned
long
&available)
{
total = 0;
available = 0;
char
buf[128] = {
'\0'
};
string fileName;
char
*p;
fstream fProc(
"/proc/partitions"
,ios_base::in);
unsigned
long
total2 = 0, free2 = 0, sumTotal = 0, sumFree = 0;
int
major = 0, minor = 0;
//首先计算总大小及各个分区的大小，包括交换分区，然后用df命令获取可用空间
while
(!fProc.eof())
{
fProc>>fileName;
total2 =
strtol
(fileName.c_str(),&p,10);
if
(total2 == 0)
continue
;
else
if
(total2 == LONG_MAX || total2 == LONG_MIN || p == fileName.c_str())
return
total2;
else
{
major = total2;
fProc>>minor;
fProc>>total2;
fProc>>fileName;
SysDiskInfo tmp;
tmp.total = (unsigned
long
)(total2/1024);
tmp.
free
= 0;
tmp.name = fileName;
diskInfo.push_back(tmp);
if
((fileName.find(
"sd"
)!= string::npos || fileName.find(
"hd"
) != string::npos) &&
!(fileName[fileName.size()-1] >=
'0'
&& fileName[fileName.size()-1] <=
'9'
))
sumTotal += tmp.total;
fileName.clear();
}
}
//获取可用空间
const
char
*command =
"df"
;
const
char
*type =
"r"
;
FILE
*pFile = popen(command,type);
char
buf2[1024] = {
'\0'
};
char
filesys[32] = {
'\0'
}, usage[8] = {
'\0'
}, mountedon[32] = {
'\0'
};
unsigned
long
kblocks = 0, used = 0, available2 = 0;
if
(pFile == NULL)
return
-1;
vector<SysDiskInfo>::iterator it;
while
(!
feof
(pFile) )
{
if
(
fgets
(buf2 , 1024 , pFile) == NULL )
break
;
sscanf
(buf2,
"%s %ld %ld %ld %s %s"
,filesys,&kblocks,&used,&available2,usage,mountedon);
string ff(filesys);
if
(ff.rfind(
"/"
) == string::npos)
continue
;
for
(it = diskInfo.begin(); it != diskInfo.end();it++)
{
if
(it->name == ff.substr(ff.rfind(
"/"
)+1))
{
it->
free
= (unsigned
long
)(available2/1024);
sumFree += it->
free
;
}
}
memset
(buf2,
'\0'
,1024);
memset
(filesys,
'\0'
,32);
memset
(mountedon,
'\0'
,32);
memset
(usage,
'\0'
,8);
kblocks = 0;
used = 0;
available2 = 0;
}
pclose(pFile);
total = sumTotal;
available = sumFree;
return
0;
}
SysNetInfo LinuxServerState::GetNetInfo()
{
SysNetInfo tmpNetInfo;
tmpNetInfo.recv = 0;
tmpNetInfo.send = 0;
tmpNetInfo.total = 0;
timespec tmp;
tmp.tv_nsec = 0;
tmp.tv_sec = 1;
if
(0 == pthread_mutex_timedlock(&m_mutex,&tmp))
{
tmpNetInfo = m_netInfo;
pthread_mutex_unlock(&m_mutex);
}
return
tmpNetInfo;
}
void
LinuxServerState::GetProcInfo(std::vector<SysProcInfo>& procInfo)
{
timespec tmp;
tmp.tv_nsec = 0;
tmp.tv_sec = 1;
if
(0 == pthread_mutex_timedlock(&m_mutex,&tmp))
{
procInfo = m_procInfo;
pthread_mutex_unlock(&m_mutex);
}
}
void
LinuxServerState::GetNetConnectionInfo(std::vector<SysNetConnInfo>& netConnInfo)
{
int
i = 0,id = 0;
char
buf[1024] = {
'\0'
};
while
(i++ < 4)
{
fstream fInfo;
SockType stateType = UNKNOWN;
if
(i == 1)
{
fInfo.open(
"/proc/net/tcp"
,ios_base::in);
stateType = TCP;
}
else
if
(i == 2)
{
fInfo.open(
"/proc/net/udp"
,ios_base::in);
stateType = UDP;
}
else
if
(i == 3)
{
fInfo.open(
"/proc/net/tcp6"
,ios_base::in);
stateType = TCP6;
}
else
if
(i == 4)
{
fInfo.open(
"/proc/net/udp6"
,ios_base::in);
stateType = UDP6;
}
if
(stateType == UNKNOWN)
continue
;
while
(!fInfo.eof())
{
SysNetConnInfo tmpConnInfo;
char
sl[6] = {
'\0'
},localaddr[32] = {
'\0'
},remoteaddr[32] = {
'\0'
};
fInfo.getline(buf,1024);
unsigned
long
llocal = 0, lremote = 0;
int
localPort = 0, remotePort = 0, st = 0;
int
ret;
if
(i == 1 || i == 2)
{
ret =
sscanf
(buf,
"%s%x:%x%x:%x%x"
,sl,&llocal,&localPort,&lremote,&remotePort,&st);
if
(ret != 6)
continue
;
in_addr tmpAddr;
tmpAddr.s_addr = llocal;
tmpConnInfo.localAddr = inet_ntoa(tmpAddr);
tmpAddr.s_addr = lremote;
tmpConnInfo.remoteAddr = inet_ntoa(tmpAddr);
}
else
if
(i == 3 || i == 4 )
{
ret =
sscanf
(buf,
"%s%32s:%x%32s:%x%x"
,sl,&localaddr,&localPort,&remoteaddr,&remotePort,&st);
if
(ret != 6)
continue
;
char
tmp[64] = {
'\0'
};
int
pos = 0;
for
(
int
j = 0;j < 32; j++)
{
tmp[pos++] = localaddr[j];
if
((j % 4) == 3 && j != 31)
tmp[pos++] =
':'
;
}
tmpConnInfo.localAddr = string(tmp);
memset
(tmp,
'\0'
,64);
pos = 0;
for
(
int
j = 0;j < 32; j++)
{
tmp[pos++] = remoteaddr[j];
if
((j % 4) == 3 && j != 31)
tmp[pos++] =
':'
;
}
tmpConnInfo.remoteAddr = string(tmp);
}
tmpConnInfo.localPort = localPort;
tmpConnInfo.remotePort = remotePort;
tmpConnInfo.id = id++;
tmpConnInfo.protocol = stateType;
tmpConnInfo.state = (SysNetState)st;
netConnInfo.push_back(tmpConnInfo);
}
fInfo.close();
}
}
}
|
本文转自 hakuyo 51CTO博客，原文链接：http://blog.51cto.com/hakuyo/1218145，如需转载请自行联系原作者
