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v0.8.1
v0.8.1
https://github.com/python/cpython
Revision 3f14f4a3fcd4d083ab1dc082a89e9b66898d8b35 authored by Jack Jansen on 24 September 1995, 21:05:24 UTC, committed by Jack Jansen on 24 September 1995, 21:05:24 UTC
finally get the bundle stuff right.
1 parent 9722ad8
Tip revision: 3f14f4a3fcd4d083ab1dc082a89e9b66898d8b35 authored by Jack Jansen on 24 September 1995, 21:05:24 UTC
Changed the way .rsrc and template are copied: hopefully this will
Changed the way .rsrc and template are copied: hopefully this will
Tip revision: 3f14f4a
pty.py
# pty.py -- Pseudo terminal utilities.
# Bugs: No signal handling. Doesn't set slave termios and window size.
# Only tested on Linux.
# See: W. Richard Stevens. 1992. Advanced Programming in the
# UNIX Environment. Chapter 19.
# Author: Steen Lumholt -- with additions by Guido.
from select import select
import os, sys, FCNTL
import tty
STDIN_FILENO = 0
STDOUT_FILENO = 1
STDERR_FILENO = 2
CHILD = 0
# Open pty master. Returns (master_fd, tty_name). SGI and Linux/BSD version.
def master_open():
try:
import sgi
except ImportError:
pass
else:
try:
tty_name, master_fd = sgi._getpty(FCNTL.O_RDWR, 0666, 0)
except IOError, msg:
raise os.error, msg
return master_fd, tty_name
for x in 'pqrstuvwxyzPQRST':
for y in '0123456789abcdef':
pty_name = '/dev/pty' + x + y
try:
fd = os.open(pty_name, FCNTL.O_RDWR)
except os.error:
continue
return (fd, '/dev/tty' + x + y)
raise os.error, 'out of pty devices'
# Open the pty slave. Acquire the controlling terminal.
# Returns file descriptor. Linux version. (Should be universal? --Guido)
def slave_open(tty_name):
return os.open(tty_name, FCNTL.O_RDWR)
# Fork and make the child a session leader with a controlling terminal.
# Returns (pid, master_fd)
def fork():
master_fd, tty_name = master_open()
pid = os.fork()
if pid == CHILD:
# Establish a new session.
os.setsid()
# Acquire controlling terminal.
slave_fd = slave_open(tty_name)
os.close(master_fd)
# Slave becomes stdin/stdout/stderr of child.
os.dup2(slave_fd, STDIN_FILENO)
os.dup2(slave_fd, STDOUT_FILENO)
os.dup2(slave_fd, STDERR_FILENO)
if (slave_fd > STDERR_FILENO):
os.close (slave_fd)
# Parent and child process.
return pid, master_fd
# Write all the data to a descriptor.
def writen(fd, data):
while data != '':
n = os.write(fd, data)
data = data[n:]
# Default read function.
def read(fd):
return os.read(fd, 1024)
# Parent copy loop.
# Copies
# pty master -> standard output (master_read)
# standard input -> pty master (stdin_read)
def copy(master_fd, master_read=read, stdin_read=read):
while 1:
rfds, wfds, xfds = select(
[master_fd, STDIN_FILENO], [], [])
if master_fd in rfds:
data = master_read(master_fd)
os.write(STDOUT_FILENO, data)
if STDIN_FILENO in rfds:
data = stdin_read(STDIN_FILENO)
writen(master_fd, data)
# Create a spawned process.
def spawn(argv, master_read=read, stdin_read=read):
if type(argv) == type(''):
argv = (argv,)
pid, master_fd = fork()
if pid == CHILD:
apply(os.execlp, (argv[0],) + argv)
mode = tty.tcgetattr(STDIN_FILENO)
tty.setraw(STDIN_FILENO)
try:
copy(master_fd, master_read, stdin_read)
except:
tty.tcsetattr(STDIN_FILENO, tty.TCSAFLUSH, mode)
Computing file changes ...