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-rwxr-xr-xscripts/oepydevshell-internal.py92
1 files changed, 92 insertions, 0 deletions
diff --git a/scripts/oepydevshell-internal.py b/scripts/oepydevshell-internal.py
new file mode 100755
index 0000000000..f7b2e4e0bf
--- /dev/null
+++ b/scripts/oepydevshell-internal.py
@@ -0,0 +1,92 @@
1#!/usr/bin/env python
2
3import os
4import sys
5import time
6import select
7import fcntl
8import termios
9import readline
10import signal
11
12def nonblockingfd(fd):
13 fcntl.fcntl(fd, fcntl.F_SETFL, fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK)
14
15def echonocbreak(fd):
16 old = termios.tcgetattr(fd)
17 old[3] = old[3] | termios.ECHO | termios.ICANON
18 termios.tcsetattr(fd, termios.TCSADRAIN, old)
19
20def cbreaknoecho(fd):
21 old = termios.tcgetattr(fd)
22 old[3] = old[3] &~ termios.ECHO &~ termios.ICANON
23 termios.tcsetattr(fd, termios.TCSADRAIN, old)
24
25if len(sys.argv) != 3:
26 print("Incorrect parameters")
27 sys.exit(1)
28
29pty = open(sys.argv[1], "w+b", 0)
30parent = int(sys.argv[2])
31
32# Don't buffer output by line endings
33sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
34sys.stdin = os.fdopen(sys.stdin.fileno(), 'r', 0)
35nonblockingfd(pty)
36nonblockingfd(sys.stdin)
37
38
39histfile = os.path.expanduser("~/.oedevpyshell-history")
40readline.parse_and_bind("tab: complete")
41try:
42 readline.read_history_file(histfile)
43except IOError:
44 pass
45
46try:
47
48 i = ""
49 o = ""
50 # Need cbreak/noecho whilst in select so we trigger on any keypress
51 cbreaknoecho(sys.stdin.fileno())
52 # Send our PID to the other end so they can kill us.
53 pty.write(str(os.getpid()) + "\n")
54 while True:
55 try:
56 writers = []
57 if i:
58 writers.append(sys.stdout)
59 (ready, _, _) = select.select([pty, sys.stdin], writers , [], 0)
60 try:
61 if pty in ready:
62 i = i + pty.read()
63 if i:
64 # Write a page at a time to avoid overflowing output
65 # d.keys() is a good way to do that
66 sys.stdout.write(i[:4096])
67 i = i[4096:]
68 if sys.stdin in ready:
69 echonocbreak(sys.stdin.fileno())
70 o = raw_input()
71 cbreaknoecho(sys.stdin.fileno())
72 pty.write(o + "\n")
73 except (IOError, OSError) as e:
74 if e.errno == 11:
75 continue
76 if e.errno == 5:
77 sys.exit(0)
78 raise
79 except EOFError:
80 sys.exit(0)
81 except KeyboardInterrupt:
82 os.kill(parent, signal.SIGINT)
83
84except SystemExit:
85 pass
86except Exception as e:
87 import traceback
88 print("Exception in oepydehshell-internal: " + str(e))
89 traceback.print_exc()
90 time.sleep(5)
91finally:
92 readline.write_history_file(histfile)