首先建立一个while循环可执行文件
#include <stdio.h>#include <stdlib.h>int main(int argc, char *argv[]){while(1);}
编译运行：
$ gcc forever.c -o forever$ ./forever.exe &
查看进程编号：
$toptop - 09:59:45 up 21 days, 11:02, 0 users, load average: 2.94, 2.40, 1.79任务: 5 total, 2 running, 3 sleeping, 0 stopped, 0 zombie%Cpu0 : 13.9/3.0 17[||||||||| ]%Cpu1 : 33.7/1.0 35[||||||||||||||||||| ]%Cpu2 : 26.7/2.0 29[||||||||||||||| ]%Cpu3 : 29.7/1.0 31[|||||||||||||||||]GiB Mem : 54.7/3.945 [ ]GiB Swap: 2.1/1.375 [ ]进▒ USERPR NI VIRT RES %CPU %MEMTIME+ ▒ COMMAND996 toa0 0 3.4m 4.0m 99.9 0.1 0:26.04 R forever
是996没错了！
然后编写一个可以运行命令行的C语言函数
#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <string.h>int main(int argc, char *argv[]){char cmd[256];memset(cmd, 0, 256);pid_t pid = getpid();if(argc < 2){printf("Usage: ./a.exe <pid name>\n");return -1;}sprintf(cmd, "ps -e | grep %s | awk '{print $1}'", argv[1]);system(cmd);return 0;}
编译运行：
$ gcc a.c$ ./a.exe forever996
