嗨,我必须为系统调用编写 2 个函数,这些函数将管理操作系统中任务的执行。我找不到暂停/重新启动进程的方法。我找到了一个信号列表,我知道 kill 函数,这是我的代码:
#include <stdlib.h>
#include <signal.h>
typedef struct File
{
int pid;
struct File *pids;
} *file;
file file1 = NULL;
//this fonction is to suspend a process using its pid number
int V(int pid_num)
{
//does the kill fonction just kill the process or will it take into account the signal argument?
kill(pid_num, SIGSTOP);
file1 = ajouter(file1, pid_num);
return 0;
}
//this is to restart the process
int C()
{
if (file1 != NULL)
{
//I know the kill fonction is not the right one but I just don't know any other to take as argument the pid of a process to restart it
kill(file1->pid, SIGCONT);
}
return 0;
}
//this fontion adds pid number to our structure
file ajouter(file file_n, int pid)
{
file nouveau = malloc(sizeof(file));
nouveau->pid = pid;
nouveau->pids = file_n;
return nouveau;
}
备注:此代码不应该真正工作它只是一个小模拟提前非常感谢