1 files changed, 97 insertions, 0 deletions
diff --git a/poky/scripts/oepydevshell-internal.py b/poky/scripts/oepydevshell-internal.py
new file mode 100755
index 000000000..04621ae8a
--- /dev/null
+++ b/poky/scripts/oepydevshell-internal.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+
+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 or sys.argv[1] in ('-h', '--help'):
+    print('oepydevshell-internal.py: error: the following arguments are required: pty, pid\n'
+          'Usage: oepydevshell-internal.py pty pid\n\n'
+          'OpenEmbedded oepydevshell-internal.py - internal script called from meta/classes/devshell.bbclass\n\n'
+          'arguments:\n'
+          '  pty                   pty device name\n'
+          '  pid                   parent process id\n\n'
+          'options:\n'
+          '  -h, --help            show this help message and exit\n')
+    sys.exit(2)
+
+pty = open(sys.argv[1], "w+b", 0)
+parent = int(sys.argv[2])
+
+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()).encode('utf-8') + b"\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().decode('utf-8')
+                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])
+                    sys.stdout.flush()
+                    i = i[4096:]
+                if sys.stdin in ready:
+                    echonocbreak(sys.stdin.fileno())
+                    o = input().encode('utf-8')
+                    cbreaknoecho(sys.stdin.fileno())
+                    pty.write(o + b"\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)