Named pipe FIFO in Linux

Anonymous pipe pipes have been said before, the next is named pipe FIFO;

We can use one of the following functions to create a named pipe whose prototype is as follows:
#include <sys/types.h>
#include <sys/stat.h>
int Mkfifo (const char *filename, mode_t mode);
int Mknod (const char *filename, mode_t mode | S_ififo, (dev_t) 0);Both of these functions can create aFifo，Note is to create a file that is actually present in the file system,FileName specify filename, modemknodmkfifo try to use mkfifo and not mknod

< Span style= "Font-family:baskerville;font-size:12pt;color:rgb (50,51,50);" >   mkfifofifo function, named pipe. The pipes in front of them all have no names, so they are called anonymous pipes, or pipes for short. For file systems, Tao is a visible file, so it can be used for Any two processes is the parent-child process, regardless of whether the two processes are related.

server . C Read

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <string.h>

#include <fcntl.h>

int main ()

{

if (Mkfifo ("./fifo", s_ififo|0666) < 0)

{

Perror ("Mkfifo");

return 1;

}

int Fd=open ("./fifo", o_rdonly);

if (fd<0)

{

Perror ("open");

return 2;

}

Char buf[1024];

while (1)

{

memset (buf, ' n ', sizeof (BUF));

Read (fd,buf,sizeof (BUF)-1);

printf ("client#%s", buf);

}

Close (FD);

return 0;

}

client . C Write

The code is as follows:

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <string.h>

#include <fcntl.h>

int main ()

{

int Fd=open ("./fifo", o_wronly);

if (fd<0)

{

Perror ("open");

return 2;

}

Char buf[1024];

while (1)

{

printf ("Please enter#");

Fflush (stdout);

ssize_t Sz=read (0,buf,sizeof (BUF)-1);

if (sz>0)

{

buf[sz]= ' + ';

}

Write (Fd,buf,strlen (BUF));

}

Close (FD);

return 0;

}

/span>

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Named pipe FIFO in Linux