Working with Pipes

#include <unistd.h>
int pipe(int pipefd[2]);

pipe() - creates an anonymous pipe.

• The pipefd array is used to return two file descriptors pointing to the ends of the pipe.

• pipefd[0] refers to the read end of the pipe

• pipefd[1] refers to the write end of the pipe.

#include <sys/types.h>
#include <sys/stat.h>
int mkfifo(const char *pathname, mode_t mode);

mkfifo() - creates a named pipe (FIFO).

• mode specifies the permissions for the FIFO structure. It is modified by the umask method in the usual way: the permissions of the created file are (mode & ~umask).