fork() -> (pid, master_fd) Fork and make the child a session leader with a controlling terminal.
()
| 88 | return result |
| 89 | |
| 90 | def fork(): |
| 91 | """fork() -> (pid, master_fd) |
| 92 | Fork and make the child a session leader with a controlling terminal.""" |
| 93 | |
| 94 | try: |
| 95 | pid, fd = os.forkpty() |
| 96 | except (AttributeError, OSError): |
| 97 | pass |
| 98 | else: |
| 99 | if pid == CHILD: |
| 100 | try: |
| 101 | os.setsid() |
| 102 | except OSError: |
| 103 | # os.forkpty() already set us session leader |
| 104 | pass |
| 105 | return pid, fd |
| 106 | |
| 107 | master_fd, slave_fd = openpty() |
| 108 | pid = os.fork() |
| 109 | if pid == CHILD: |
| 110 | os.close(master_fd) |
| 111 | os.login_tty(slave_fd) |
| 112 | else: |
| 113 | os.close(slave_fd) |
| 114 | |
| 115 | # Parent and child process. |
| 116 | return pid, master_fd |
| 117 | |
| 118 | def _read(fd): |
| 119 | """Default read function.""" |