Please enable JavaScript.

Coggle requires JavaScript to display documents.

Inter-process communication (Sending output to popen (A buffer is created…

- - - - from one process to another
  - - - cm1 | cm2
        
        Output of cm1 is input for cm2
- - - - Allows the program to invoke another
        
        Open modes
        
        r or w
    - - After popen has finished
        
        Stream is closed using pclose
- - - - command string as arguments
- - - - Address is passed as parameter
        
        pipe(file_pipes)
- - - - file_pipes must be sent as argument
- - - - create named pipes
      - new one is mkfifo
      - from inside a program
        
        mkfifo
        
        mknod
    - - cat < /my_fifo
      - echo "Hello World" > /my_fifo
      - It's a file
        
        open can be used
        
        no O_RDWR mode!
- - - - no process has the pipe open forwriting
        
        ending is denoted with 0
- - - - Becomes pipe file descriptor