.TH "KDK_GET_PROCESS_COMMAND" 3 "Mon Sep 18 2023" "Linux Programmer's Manual" \"
.SH NAME
kdk_get_process_command - 获取某一进程的Command
.SH SYNOPSIS
.nf
.B #include <libkyprocess.h>
.sp
.BI "extern char* kdk_get_process_command(int "proc_num ");" 
.sp
Link with \fI\-lkyrtinfo\fP.
.SH "Detailed Description"
The main function of the interface is to obtain the Command of the specified process.
.PP
The argument
.I proc_num
is the PID of the process.
.SH "RETURN VALUE"
On success, returns the Command of the process of type char*, such as "/lib/systemd/systemd-journald"; The returned string needs to be released by
.I free
.
.PP
On error, return
.BR NULL.
.SH EXAMPLES
.EX
#include "libkyprocess.h"
#include <stdio.h>
#include <stdlib.h>

int main()
{
    char *run_time = kdk_get_process_running_time(841);
    char *cpu_time = kdk_get_process_cpu_time(841);
    char *cmd = kdk_get_process_command(841);
    char *start_time = kdk_get_process_start_time(841);
    printf("获取某一进程的CPU利用率：%0.1f\n", kdk_get_process_cpu_usage_percent(841));
    printf("获取某一进程的内存占用率：%0.1f\n", kdk_get_process_mem_usage_percent(841));
    printf("获取某一进程的进程状态：%s\n", kdk_get_process_status(841));
    printf("获取某一进程的进程端口号：%d\n", kdk_get_process_port(841));
    printf("获取某一进程的启动时间：%s\n", start_time);
    printf("获取某一进程的运行时间：%s\n", run_time);
    printf("获取某一进程的CPU时间：%s\n", cpu_time);
    printf("获取某一进程的Command：%s\n", cmd);
    printf("获取某一进程的属主：%s\n", kdk_get_process_user(841));
    free(run_time);
    free(cpu_time);
    free(cmd);
    free(start_time);
    char** pid =  kdk_procname_get_process_infomation("systemd");
    size_t index = 0;
    while (pid[index])
    {
        printf("pid %s\n", pid[index]);
        index ++;
    }
    kdk_proc_freeall(pid);

    char** info = kdk_get_process_all_information();
    size_t count = 0;
    while (info[count])
    {
        printf("No. %d\t %s\n", count + 1, info[count]);
        count ++;
    }
    kdk_proc_freeall(info);

    char *name = kdk_get_process_name(1151571);
    printf("name = %s\n", name);
    free(name);

    int id =  kdk_get_process_id("systemd");
    printf("pid %d\n", id);
   
    return 0;
}

.SH "CONFORMING TO"
These functions are as per the withdrawn POSIX.1e draft specification.
The following functions are Linux extensions:
.BR kdk_get_process_name (),
.BR kdk_get_process_id (),
.BR kdk_get_process_cpu_usage_percent (),
.BR kdk_get_process_mem_usage_percent (),
.BR kdk_get_process_status (),
.BR kdk_get_process_port (),
.BR kdk_get_process_start_time (),
.BR kdk_get_process_running_time (),
.BR kdk_get_process_cpu_time (),
.BR kdk_get_process_user (),
.BR kdk_procname_get_process_infomation (),
.BR kdk_get_process_all_information ()
and
.BR kdk_proc_freeall ().
.SH "SEE ALSO"
.BR kdk_get_process_name (3),
.BR kdk_get_process_id (3),
.BR kdk_get_process_cpu_usage_percent (3),
.BR kdk_get_process_mem_usage_percent (3),
.BR kdk_get_process_status (3),
.BR kdk_get_process_port (),
.BR kdk_get_process_start_time (3),
.BR kdk_get_process_running_time (3),
.BR kdk_get_process_cpu_time (3),
.BR kdk_get_process_user (3),
.BR kdk_procname_get_process_infomation (3),
.BR kdk_get_process_all_information (3)
and
.BR kdk_proc_freeall (3).