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#!/usr/bin/env python
import fcntl
import os
import sys
def ttyname(fd):
try:
t = os.ttyname(fd)
if hasattr(t, 'decode'):
t = t.decode()
return t
except OSError:
return None
def controlling_tty():
try:
fp = open('/dev/tty')
try:
return ttyname(fp.fileno())
finally:
fp.close()
except (IOError, OSError):
return None
out_path = sys.argv[1]
fd = int(sys.argv[2])
st = os.fstat(fd)
if sys.argv[3] == 'write':
os.write(fd, u'TEST'.encode())
buf = u''
else:
buf = os.read(fd, 4).decode()
output = repr({
'buf': buf,
'flags': fcntl.fcntl(fd, fcntl.F_GETFL),
'st_mode': st.st_mode,
'st_dev': st.st_dev,
'st_ino': st.st_ino,
'ttyname': ttyname(fd),
'controlling_tty': controlling_tty(),
})
try:
out_f = open(out_path, 'w')
except Exception:
exc = sys.exc_info()[1]
sys.stderr.write("Failed to open %r: %r" % (out_path, exc))
sys.exit(1)
try:
out_f.write(output)
except Exception:
out_f.close()
exc = sys.exc_info()[1]
sys.stderr.write("Failed to write to %r: %r" % (out_path, exc))
sys.exit(2)
out_f.close()
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