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Availability: IRIX, Linux.
The pty module defines operations for handling the pseudo-terminal
concept: starting another process and being able to write to and read from its controlling
terminal programmatically.
Because pseudo-terminal handling is highly platform dependant, there is code to do it only
for SGI and Linux. (The Linux code is supposed to work on other platforms, but hasn't been
tested yet.)
The pty module defines the following functions:
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- Fork. Connect the child's controlling terminal to a pseudo-terminal. Return value is
(pid,
fd). Note that the child gets pid 0, and the fd is
invalid. The parent's return value is the pid of the child, and fd
is a file descriptor connected to the child's controlling terminal (and also to the
child's standard input and output).
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- Open a new pseudo-terminal pair, using os.openpty() if
possible, or emulation code for SGI and generic Unix
systems. Return a pair of file descriptors
(master, slave),
for the master and the slave end, respectively.
-
| spawn( |
argv[, master_read[, stdin_read]]) |
- Spawn a process, and connect its controlling terminal with the current process's
standard io. This is often used to baffle programs which insist on reading from the
controlling terminal.
The functions master_read and stdin_read should be functions
which read from a file-descriptor. The defaults try to read 1024 bytes each time they are
called.
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