Using fork is the easiest way to create child process.fork () is part of the os standard Python library.
Here, we solve this task by using of pipe(). For passing information from one process to another pipe() is used. For two way communication two pipes can be use, one for each direction because pipe() is unidirectional.
Step 1: file descriptors r, w for reading and writing. Step 2: Create a process using the fork. Step 3: if process id is 0 then create a child process. Step 4: else create parent process.
import os def parentchild(cwrites): r, w = os.pipe() pid = os.fork() if pid: os.close(w) r = os.fdopen(r) print ("Parent is reading") str = r.read() print( "Parent reads =", str) else: os.close(r) w = os.fdopen (w, 'w') print ("Child is writing") w.write(cwrites) print("Child writes = ",cwrites) w.close() # Driver code cwrites = "Python Program" parentchild(cwrites)
Child is writing Child writes = Python Program Parent is reading Parent reads = Python Program