108 lines
3.3 KiB
Groff
108 lines
3.3 KiB
Groff
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.TH "KDK_GET_PROCESS_CPU_TIME" 3 "Mon Sep 18 2023" "Linux Programmer's Manual" \"
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.SH NAME
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kdk_get_process_cpu_time - 获取某一进程的cpu时间
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.SH SYNOPSIS
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.nf
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.B #include <libkyprocess.h>
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.sp
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.BI "extern char* kdk_get_process_cpu_time(int "proc_num ");"
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.sp
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Link with \fI\-lkyrtinfo\fP.
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.SH "Detailed Description"
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The main function of the interface is to obtain the CPU time of the specified process.
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.PP
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The argument
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.I proc_num
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is the PID of the process.
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.SH "RETURN VALUE"
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On success, returns the CPU time of the process of type char*, such as "58秒"; The returned string needs to be released by
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.I free
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.
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.PP
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On error, return
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.BR NULL.
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.SH EXAMPLES
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.EX
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#include "libkyprocess.h"
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#include <stdio.h>
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#include <stdlib.h>
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int main()
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{
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char *run_time = kdk_get_process_running_time(841);
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char *cpu_time = kdk_get_process_cpu_time(841);
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char *cmd = kdk_get_process_command(841);
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char *start_time = kdk_get_process_start_time(841);
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printf("获取某一进程的CPU利用率：%0.1f\n", kdk_get_process_cpu_usage_percent(841));
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printf("获取某一进程的内存占用率：%0.1f\n", kdk_get_process_mem_usage_percent(841));
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printf("获取某一进程的进程状态：%s\n", kdk_get_process_status(841));
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printf("获取某一进程的进程端口号：%d\n", kdk_get_process_port(841));
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printf("获取某一进程的启动时间：%s\n", start_time);
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printf("获取某一进程的运行时间：%s\n", run_time);
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printf("获取某一进程的CPU时间：%s\n", cpu_time);
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printf("获取某一进程的Command：%s\n", cmd);
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printf("获取某一进程的属主：%s\n", kdk_get_process_user(841));
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free(run_time);
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free(cpu_time);
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free(cmd);
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free(start_time);
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char** pid = kdk_procname_get_process_infomation("systemd");
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size_t index = 0;
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while (pid[index])
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{
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printf("pid %s\n", pid[index]);
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index ++;
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}
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kdk_proc_freeall(pid);
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char** info = kdk_get_process_all_information();
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size_t count = 0;
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while (info[count])
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{
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printf("No. %d\t %s\n", count + 1, info[count]);
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count ++;
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}
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kdk_proc_freeall(info);
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char *name = kdk_get_process_name(1151571);
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printf("name = %s\n", name);
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free(name);
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int id = kdk_get_process_id("systemd");
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printf("pid %d\n", id);
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return 0;
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}
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.SH "CONFORMING TO"
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These functions are as per the withdrawn POSIX.1e draft specification.
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The following functions are Linux extensions:
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.BR kdk_get_process_name (),
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.BR kdk_get_process_id (),
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.BR kdk_get_process_cpu_usage_percent (),
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.BR kdk_get_process_mem_usage_percent (),
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.BR kdk_get_process_status (),
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.BR kdk_get_process_port (),
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.BR kdk_get_process_start_time (),
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.BR kdk_get_process_running_time (),
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.BR kdk_get_process_command (),
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.BR kdk_get_process_user (),
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.BR kdk_procname_get_process_infomation (),
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.BR kdk_get_process_all_information ()
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and
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.BR kdk_proc_freeall ().
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.SH "SEE ALSO"
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.BR kdk_get_process_name (3),
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.BR kdk_get_process_id (3),
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.BR kdk_get_process_cpu_usage_percent (3),
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.BR kdk_get_process_mem_usage_percent (3),
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.BR kdk_get_process_status (3),
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.BR kdk_get_process_port (),
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.BR kdk_get_process_start_time (3),
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.BR kdk_get_process_running_time (3),
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.BR kdk_get_process_command (3),
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.BR kdk_get_process_user (3),
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.BR kdk_procname_get_process_infomation (3),
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.BR kdk_get_process_all_information (3)
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and
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.BR kdk_proc_freeall (3).
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