Allow -current libsndio to connect to old sndiod servers

Recent sndio device naming change is missing the proper compatibility
bits for this case. Found and fixed by bluhm@ and tweaks from me.

ok b

Allow -current libsndio to connect to old sndiod servers

Recent sndio device naming change is missing the proper compatibility
bits for this case. Found and fixed by bluhm@ and tweaks from me.

ok bluhm

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Stop binding audio devices exposed by sndiod to physical devices

This a shift towards a new model: clients connect to logical devices
(created with -s option) then the server routes data to/from the

Stop binding audio devices exposed by sndiod to physical devices

This a shift towards a new model: clients connect to logical devices
(created with -s option) then the server routes data to/from the
underlying physical device (registered with -f option). The binding
may be changed at run-time with the server.device control exposed by
sndioctl(1).

As audio devices exposed by sndiod(8) are not bound to fixed physical
devices anymore, the physical audio device number component of
sndio(7) descriptors was removed.

fixes, help from and ok denis, edd

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Add affinity between the program and its mixer control.

Currently, if there are two instances of the same program, sndiod will
allocate one volume control to each. If both programs disconnect and
re

Add affinity between the program and its mixer control.

Currently, if there are two instances of the same program, sndiod will
allocate one volume control to each. If both programs disconnect and
reconnect, the information of which control is assigned to which
program is lost. This makes difficult to run two instances of a player
and crossfade between each other with a MIDI controller.

To address this, the program chooses a 32-bit "id" (for now the
process pid) and sends it to the server. The server records the id in
the client's slot structure. When the server accepts a new
connection, it uses the id to identify the slot the client used during
the previous connection; if it was not recycled yet, it's assigned to
the program.

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Check if syscalls return -1 instead of any negative value.

"Looks right" deraadt

mkstemp() returns -1 on failure

Wait until server disconnects before closing the socket. Otherwise,
last bytes sent may be lost by the server.

call _sndio_parsenum() instead of duplicating the code in parsedev(); ok ratchov@

Move libsndio session cookie in its own $HOME/.sndio/ directory to
make libsndio easier to use with unveil(2).

"make sense" deraadt

Make code fit in 80 columns, remove trailing spaces & tabs.

remove NULL-checks before free()

Don't remove the type component from the device string before passing
it to the *_open() functions. It's more flexible this way. No behaviour
change.

Fix missing checks for truncation of long file names. Rather than
checking for truncation every time we touch the string, simply allocate
a memory chunk large enough to store the full path.

use macros for cookie path and temp file template instead
of hardcoded strings. no object change.

As the socket path is known, use its size rather that PATH_MAX.

use macros instead of hard-coded strings for unix sockets paths

Remove support for the AUCAT_COOKIE environment variable.

add missing braces in _aucat_wmsg()

As ratchov@ notes:
"all _aucat_wmsg() callers set hdl->wtodo, so your diff can't break
things that used to work by accident."

ok ratchov@

Use SOCK_CLOEXEC (instead of later using fcntl(F_SETFD)) when creating sockets
for talking to aucat/sndiod

ok ratchov@

Be less verbose when SNDIO_DEBUG=1 is set.

add missing prototypes

Prefix by '_' symbols that are not part of the API.

ok deraadt, guenther

internalize some functions so that they do not need prototypes
ok ratchov

in debug mode, log successful connections, from Jan Stary

Remplace aucat server by a new sndiod daemon aimed to be simpler
smaller and faster than aucat. It's a drop in replacement with the
following exceptions that don't affect the default setup:
- The s

Remplace aucat server by a new sndiod daemon aimed to be simpler
smaller and faster than aucat. It's a drop in replacement with the
following exceptions that don't affect the default setup:
- The sample rate and the encoding are a per-device parameters
thus -r and -e options must precede the corresponding -f option
- MIDI thru boxes are dynamically created and no -M option
is required anymore, so -M was removed.
- MIDI ports are exposed with a new ``midi/N'' name, rather
than abusing MIDI thru boxes.
with help from armani@, ok deraadt@

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Use dedicated messages for flow control instead of abusing clock tick
messages and enable flow control for MIDI. Since this requires protocol
version bump, both sndiod and libsndio must be kept up to

Use dedicated messages for flow control instead of abusing clock tick
messages and enable flow control for MIDI. Since this requires protocol
version bump, both sndiod and libsndio must be kept up to date to work
together.

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