管道：
#include "unpipc.h"
int
main(int argc, char **argv)
{
int fd[2];
Pipe(fd);
pid_t childpid;
int n;
if((childpid=Fork())==0){
Close(fd[0]);
char buf[2000];
Fgets(buf,2000,stdin);
Write(fd[1],buf,strlen(buf));
exit(0);
}
Close(fd[1]);
char buf[2000];
if((n=Read(fd[0],buf,2000))<0)
err_sys("error");
Fputs(buf,stdout);
waitpid(childpid,NULL,0);
exit(0);
}
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FIFO:
#include "unpipc.h"
#define FIFO_SERV "/tmp/fifo.lala"
int main(int argc,char **argv)
{
if(mkfifo(FIFO_SERV,FILE_MODE)<0&&(errno!=EEXIST))
err_sys("error");
int writefd;
writefd=Open(FIFO_SERV,O_WRONLY,0);
char buf[2000];
Fgets(buf,2000,stdin);
Write(writefd,buf,strlen(buf));
Close(writefd);
exit(0);
}
#include "unpipc.h"
#define FIFO_SERV "/tmp/fifo.lala"
int
main(int argc, char **argv)
{
if((mkfifo(FIFO_SERV,FILE_MODE))<0&&(errno!=EEXIST))
err_sys("error");
int readfd;
readfd=Open(FIFO_SERV,O_RDONLY,0);
char buf[2000];
int n;
if((n=Read(readfd,buf,2000))<0)
err_sys("read error");
Fputs(buf,stdout);
Close(readfd);
exit(0);
}
image.png
