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author | Patrick Williams <patrick@stwcx.xyz> | 2015-09-15 22:41:29 +0300 |
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committer | Patrick Williams <patrick@stwcx.xyz> | 2015-09-15 22:41:29 +0300 |
commit | 21f9b84b4b729fbd7acbd465e7a3f726e4d20f91 (patch) | |
tree | eb2d091d427ca0813b445509d59cc8e27e8ad25f /yocto-poky/scripts/oepydevshell-internal.py | |
parent | 101cef31e2bf54c678501155cd2106251acbd076 (diff) | |
parent | c124f4f2e04dca16a428a76c89677328bc7bf908 (diff) | |
download | openbmc-21f9b84b4b729fbd7acbd465e7a3f726e4d20f91.tar.xz |
Merge commit 'c124f4f2e04dca16a428a76c89677328bc7bf908' as 'yocto-poky'
Diffstat (limited to 'yocto-poky/scripts/oepydevshell-internal.py')
-rwxr-xr-x | yocto-poky/scripts/oepydevshell-internal.py | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/yocto-poky/scripts/oepydevshell-internal.py b/yocto-poky/scripts/oepydevshell-internal.py new file mode 100755 index 000000000..f7b2e4e0b --- /dev/null +++ b/yocto-poky/scripts/oepydevshell-internal.py @@ -0,0 +1,92 @@ +#!/usr/bin/env python + +import os +import sys +import time +import select +import fcntl +import termios +import readline +import signal + +def nonblockingfd(fd): + fcntl.fcntl(fd, fcntl.F_SETFL, fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK) + +def echonocbreak(fd): + old = termios.tcgetattr(fd) + old[3] = old[3] | termios.ECHO | termios.ICANON + termios.tcsetattr(fd, termios.TCSADRAIN, old) + +def cbreaknoecho(fd): + old = termios.tcgetattr(fd) + old[3] = old[3] &~ termios.ECHO &~ termios.ICANON + termios.tcsetattr(fd, termios.TCSADRAIN, old) + +if len(sys.argv) != 3: + print("Incorrect parameters") + sys.exit(1) + +pty = open(sys.argv[1], "w+b", 0) +parent = int(sys.argv[2]) + +# Don't buffer output by line endings +sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) +sys.stdin = os.fdopen(sys.stdin.fileno(), 'r', 0) +nonblockingfd(pty) +nonblockingfd(sys.stdin) + + +histfile = os.path.expanduser("~/.oedevpyshell-history") +readline.parse_and_bind("tab: complete") +try: + readline.read_history_file(histfile) +except IOError: + pass + +try: + + i = "" + o = "" + # Need cbreak/noecho whilst in select so we trigger on any keypress + cbreaknoecho(sys.stdin.fileno()) + # Send our PID to the other end so they can kill us. + pty.write(str(os.getpid()) + "\n") + while True: + try: + writers = [] + if i: + writers.append(sys.stdout) + (ready, _, _) = select.select([pty, sys.stdin], writers , [], 0) + try: + if pty in ready: + i = i + pty.read() + if i: + # Write a page at a time to avoid overflowing output + # d.keys() is a good way to do that + sys.stdout.write(i[:4096]) + i = i[4096:] + if sys.stdin in ready: + echonocbreak(sys.stdin.fileno()) + o = raw_input() + cbreaknoecho(sys.stdin.fileno()) + pty.write(o + "\n") + except (IOError, OSError) as e: + if e.errno == 11: + continue + if e.errno == 5: + sys.exit(0) + raise + except EOFError: + sys.exit(0) + except KeyboardInterrupt: + os.kill(parent, signal.SIGINT) + +except SystemExit: + pass +except Exception as e: + import traceback + print("Exception in oepydehshell-internal: " + str(e)) + traceback.print_exc() + time.sleep(5) +finally: + readline.write_history_file(histfile) |