tree d3c0b21dc7c7483463dea649b9f23c63a0158c97
parent 2c8b35bdd25b0946d4ea35e74a1e20ccd4679325
author Barry Warsaw <barry@python.org> 909874374 +0000
committer Barry Warsaw <barry@python.org> 909874374 +0000
HG:extra convert_revision:svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/python/branches/legacy-trunk%4011963

audio(7I) suggests that applications do the following to get the
device and control pseudo-device:

- first look for the device filename in the environment variable
  AUDIODEV.

- if not found, use /dev/audio

- calculate the control device by tacking "ctl" onto the base device
  name.

We now do this.  Also, if the open fails, we call
PyErr_SetFromErrnoWithFilename() to give a more informative error
message.

Added a fileno() method to the audio object returned from open().
This returns the file descriptor which can be used by applications to
set up SIGPOLL notification, as per the manpage.