Linux下用来获取各种系统信息的C++类
下面是头文件内容，代码是mooon的一部分，对应的CPP文件请直接浏览：http://code.google.com/p/mooon/source/browse/trunk/common_library/src/sys/info.cpp
#include <vector>#include "sys/config.h"SYS_NAMESPACE_BEGIN
/*** * 用来获取系统、内核和进程的各类实时信息，如CPU和内存数据 */class CInfo{public: /*** * 系统当前实时信息 */ typedef struct { long uptime_second; /* Seconds since boot */ unsigned long average_load[3]; /* 1, 5, and 15 minute load averages */ unsigned long ram_total; /* Total usable main memory size */ unsigned long ram_free; /* Available memory size */ unsigned long ram_shared; /* Amount of shared memory */ unsigned long ram_buffer; /* Memory used by buffers */ unsigned long swap_total; /* Total swap space size */ unsigned long swap_free; /* swap space still available */ unsigned short process_number; /* Number of current processes */ }sys_info_t;
/*** * 当前进程时间信息 */ typedef struct { long user_time; /* user time */ long system_time; /* system time */ long user_time_children; /* user time of children */ long system_time_children; /* system time of children */ }process_time_t;
/*** * 当前系统CPU信息 */ typedef struct { // 单位: jiffies, 1jiffies=0.01秒 uint64_t total; uint32_t user; /** 从系统启动开始累计到当前时刻，处于用户态的运行时间，不包含 nice值为负进程 */ uint32_t nice; /** 从系统启动开始累计到当前时刻，nice值为负的进程所占用的CPU时间 */ uint32_t system; /** 从系统启动开始累计到当前时刻，处于核心态的运行时间 */ uint32_t idle; /** 从系统启动开始累计到当前时刻，除IO等待时间以外的其它等待时间 */ uint32_t iowait; /** 从系统启动开始累计到当前时刻，IO等待时间(2.5.41) */ uint32_t irq; /** 从系统启动开始累计到当前时刻，硬中断时间(2.6.0) */ uint32_t softirq; /** 从系统启动开始累计到当前时刻，软中断时间(2.6.0) */ //uint32_t stealstolen; /** which is the time spent in other operating systems when running in a virtualized environment(2.6.11) */ //uint32_t guest; /** which is the time spent running a virtual CPU for guest operating systems under the control of the Linux kernel(2.6.24) */ }cpu_info_t;
/*** * 当前系统内存信息 */ typedef struct { uint32_t mem_total; uint32_t mem_free; uint32_t buffers; uint32_t cached; uint32_t swap_cached; uint32_t swap_total; uint32_t swap_free; }mem_info_t;
/*** * 内核版本号 */ typedef struct { int16_t major; /** 主版本号 */ int16_t minor; /** 次版本号(如果次版本号是偶数，那么内核是稳定版；若是奇数则是开发版) */ int16_t revision; /** 修订版本号 */ }kernel_version_t;
/*** * 当时进程状态信息 * * 进程的状态值: D Uninterruptible sleep (usually IO) R Running or runnable (on run queue) S Interruptible sleep (waiting for an event to complete) T Stopped, either by a job control signal or because it is being traced. W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z Defunct ("zombie") process, terminated but not reaped by its parent. */ typedef struct { /** 01 */ pid_t pid; /** 进程号，其允许的最大值，请查看/proc/sys/kernel/pid_max */ /** 02 */ char comm[FILENAME_MAX]; /** 进程的名字，不包括路径 */ /** 03 */ char state; /** 进程的状态 */ /** 04 */ pid_t ppid; /** 父进程号 */ /** 05 */ pid_t pgrp; /** 进程组号 */ /** 06 */ pid_t session; /** 进程会话号 */ /** 07 */ int tty_nr; /** The tty the process uses */ /** 08 */ pid_t tpgid; /** The tty the process uses */ /** 09 */ unsigned int flags; /** The kernel flags word of the process (%lu before Linux 2.6.22) */ /** 10 */ unsigned long minflt; /** The number of minor faults the process has made which have not required loading a memory page from disk */ /** 11 */ unsigned long cminflt; /** The number of minor faults that the process's waited-for children have made */ /** 12 */ unsigned long majflt; /** The number of major faults the process has made which have required loading a memory page from disk */ /** 13 */ unsigned long cmajflt; /** The number of major faults that the process's waited-for children have made */ /** 14 */ unsigned long utime; /** The number of jiffies that this process has been scheduled in user mode */ /** 15 */ unsigned long stime; /** The number of jiffies that this process has been scheduled in kernel mode */ /** 16 */ long cutime; /** The number of jiffies that this process's waited-for children have been scheduled in user mode */ /** 17 */ long cstime; /** The number of jiffies that this process's waited-for children have been scheduled in kernel mode */ /** 18 */ long priority; /** The standard nice value, plus fifteen. The value is never negative in the kernel */ /** 19 */ long nice; /** The nice value ranges from 19 (nicest) to -19 (not nice to others) */ /** 20 */ long num_threads; /** Number of threads in this process (since Linux 2.6). Before kernel 2.6, this field was hard coded to 0 as a placeholder */ /** 21 */ long itrealvalue; /** The time in jiffies before the next SIGALRM is sent to the process due to an interval timer.2.6.17, this field is no longer maintained, and is hard coded as 0 */ /** 22 */ long long starttime; /** The time in jiffies the process started after system boot */ /** 23 */ unsigned long vsize; /** Virtual memory size in bytes */ /** 24 */ long rss; /** Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes */ /** 25 */ unsigned long rlim; /** Current limit in bytes on the rss of the process (usually 4294967295 on i386) */ /** 26 */ unsigned long startcode; /** The address above which program text can run */ /** 27 */ unsigned long endcode; /** The address below which program text can run */ /** 28 */ unsigned long startstack; /** The address of the start of the stack */ /** 29 */ unsigned long kstkesp; /** The current value of esp (stack pointer), as found in the kernel stack page for the process */ /** 30 */ unsigned long kstkeip; /** The current EIP (instruction pointer) */ /** 31 */ unsigned long signal; /** The bitmap of pending signals */ /** 32 */ unsigned long blocked; /** The bitmap of blocked signals */ /** 33 */ unsigned long sigignore; /** The bitmap of ignored signals */ /** 34 */ unsigned long sigcatch; /** The bitmap of caught signals */ /** 35 */ unsigned long nswap; /** Number of pages swapped (not maintained). */ /** 36 */ unsigned long cnswap; /** Cumulative nswap for child processes (not maintained) */ /** 37 */ int exit_signal; /** Signal to be sent to parent when we die (since Linux 2.1.22) */ /** 38 */ int processor; /** CPU number last executed on (since Linux 2.2.8) */ }process_info_t;
/*** * 网卡流量数据结构 */ typedef struct { /** 01 */ char interface_name[INTERFACE_NAME_MAX]; /** 网卡名，如eth0 */
/** 接收数据 */ /** 02 */ unsigned long receive_bytes; /** 此网卡接收到的字节数 */ /** 03 */ unsigned long receive_packets; /** 04 */ unsigned long receive_errors; /** 05 */ unsigned long receive_dropped; /** 06 */ unsigned long receive_fifo_errors; /** 07 */ unsigned long receive_frame; /** 08 */ unsigned long receive_compressed; /** 09 */ unsigned long receive_multicast;
/** 发送数据 */ /** 10 */ unsigned long transmit_bytes; /** 此网卡已发送的字节数 */ /** 11 */ unsigned long transmit_packets; /** 12 */ unsigned long transmit_errors; /** 13 */ unsigned long transmit_dropped; /** 14 */ unsigned long transmit_fifo_errors; /** 15 */ unsigned long transmit_collisions; /** 16 */ unsigned long transmit_carrier; /** 17 */ unsigned long transmit_compressed; }net_info_t;
/*** * 进程页信息结构 */ typedef struct { long size; /** 程序大小 */ long resident; /** 常驻内存空间大小 */ long share; /** 共享内存页数 */ long text; /** 代码段占用内存页数 */ long lib; /** 数据/堆栈段占用内存页数 */ long data; /** 引用库占用内存页数 */ }process_page_info_t;
public: /** 获取系统信息，具体请参考sys_info_t的描述 */ static bool get_sys_info(sys_info_t& sys_info);
/** 获取内存信息，具体请参考mem_info_t的描述 */ static bool get_mem_info(mem_info_t& mem_info);
/** 获取总CPU信息，具体请参考cpu_info_t的描述 */ static bool get_cpu_info(cpu_info_t& cpu_info);
/** 获取所有CPU信息，具体请参考cpu_info_t的描述 */static int get_cpu_info_array(std::vector<cpu_info_t>& cpu_info_array);
/** 得到内核版本号 */ static bool get_kernel_version(kernel_version_t& kernel_version);
/** 获取进程信息，具体请参考process_info_t的描述 */ static bool get_process_info(process_info_t& process_info);
/** 获取进程页信息，具体请参考process_page_info_t的描述 */ static bool get_process_page_info(process_page_info_t& process_page_info);
/** 获取进程运行时间数据，具体请参考process_time_t的描述 */ static bool get_process_times(process_time_t& process_time); /*** * 获取网卡流量等信息 * 流量 = (当前获取的值 - 上一时间获取的值) / 两次间隔的时长 * @interface_name: 网卡名，如eth0等 * @net_info: 存储网卡流量等数据 */ static bool get_net_info(const char* interface_name, net_info_t& net_info); static bool get_net_info_array(std::vector<net_info_t>& net_info_array);
private: static bool do_get_net_info_array(const char* interface_name, std::vector<net_info_t>& net_info_array);};
SYS_NAMESPACE_END
