It seems that version checking is more complicated:
Syntax is one-way settlement from the configuration files.
It cannot be conditional.
The library version string is hard to check with regex.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It may be useful to check the current syntax version (and maybe
library version) when new features are added.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It may be useful to check additional sysfs parameters like USB descriptors
to determine the exact hardware capabilities.
Introduce 'sys-card' substitution and 'sys' substitution to allow data
fetching from given range. Also, add conversion to hexadecimal format
when the source file has binary contents.
Example - fetch bytes from positions 0x10..0x15 (6 bytes):
Define.Bytes1 "${sys-card:[type=hex,pos=0x10,size=6]device/../descriptors}"
Example - fetch one byte from position 0x22:
Define.Bytes2 "${sys-card:[type=hex,pos=0x22]device/../descriptors}"
Replace type=hex or omit this variable settings to work with ASCII
characters.
Link: https://github.com/alsa-project/alsa-ucm-conf/issues/444
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Use the appropriate variable for access/eaccess call.
Fixes: https://github.com/alsa-project/alsa-lib/issues/395
Fixes: ef6463a2 ("ucm: fix Path condition - substitute Path and Mode fields")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Use macro to maintain only one code. The status may be 0 or 1 - handle
both values correctly.
Also, fix the possible memory leak in snd_use_case_geti() - string
str should be freed even when the error is returned.
Fixes: 436cd5b6 ("ucm: add existence checks to geti calls")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Right now in snd_use_case_geti you cannot tell if the item being queried
exists or not when being checked. This also means the only way to check
for the existence of something in the client of the library is to
iterate over the list of mods/devs even if we know exactly the name we
are looking for. We have functions that do exactly this internally so
lets return this information in a logical fashion through geti.
Also clean up some trailing white space nearby.
Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It is useful to include a toplevel configuration file from another
toplevel configuration file. Ignore the further Syntax updates
(assuming the that the parent knows what to do).
Also, parse the Syntax field in own function.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
due to undefined reference to 'environ' error, ucm_exec.c uses workaround.
Fixes: https://github.com/alsa-project/alsa-lib/pull/250
Signed-off-by: SASANO Takayoshi <uaa@uaa.org.uk>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Note: NetBSD and OpenBSD has both <endian.h> and <sys/endian.h>
Fixes: https://github.com/alsa-project/alsa-lib/pull/250
Signed-off-by: SASANO Takayoshi <uaa@uaa.org.uk>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
The file type in the st_mode field is not encoded as unique bits but as
an enumerator. Checking if some bits of S_IFLNK are set does not work
correctly because it happens to evaluate to true for regular files as
well.
The POSIX man page suggests using the following approach to check
the file type:
if ((sb.st_mode & S_IFMT) == S_IFLNK)
Alternatively, there is a S_ISLNK() macro to check this more easily.
Make use of the latter so that readlink() is only called on actual
symbolic links and not regular files. This makes audio work again
with slightly older alsa-ucm-conf versions or alternative top-level
ucm.conf configurations that do not make use of symlinks.
Fixes: d6adde0e ("ucm: top-level path - set directory from symlink")
Fixes: https://github.com/alsa-project/alsa-lib/pull/249
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It is useful to run all disable sequences for all
UCM devices in a verb to ensure the valid, expected
initial state.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Continue the work in commit ba86ac55 ("conf: Use LFS calls when reading
config files") and fix the UCM code, too.
Fixes: https://github.com/alsa-project/alsa-lib/pull/223
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It seems that the use the macro name as the variable prefix is too large.
Use just two underscores as prefix for the macro arguments to make
macro definitions more readable.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It may be useful to call the sequences from devices from
the verb sequences or another device sequences.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
