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April 7, 2018 06:58
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Testing pty.fork()
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| import pty | |
| import time | |
| import os | |
| import sys | |
| pid, fd = pty.fork() | |
| if pid == 0: | |
| # Child process | |
| while True: | |
| try: | |
| sys.stdout.write('Hello World!\n') | |
| time.sleep(100) | |
| except KeyboardInterrupt: | |
| sys.stdout.write('SIGINT Received!\n') | |
| sys.exit(1) | |
| else: | |
| print('Parent wait for 1 sec then write 0x03...') | |
| time.sleep(1) | |
| print('Parent write 0x03') | |
| os.write(fd, b'\x03') | |
| # Read until EOF or Input/Output Error | |
| data = b'' | |
| while True: | |
| try: | |
| buf = os.read(fd, 1024) | |
| except OSError: | |
| break | |
| else: | |
| if buf != b'': | |
| data += buf | |
| else: | |
| break | |
| print('Parent read from pty fd: {}'.format(repr(data))) | |
| print('Parent wait for child process {!r} to exit...'.format(pid)) | |
| pid, status = os.waitpid(pid, 0) | |
| print('Parent exit') |
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