m. allan noah wrote:
You seem to be prone to X/Y problems.
not sure i understand that
I expect almost no backends to allow
you to set command line options in the config file.
if that is the case then i'm misunderstanding the first couple of
messages on this thread -- it sounded to me that one could alter,
at runtime, scanimage command line option arguments on a per
scanner basis with the *.conf file. (re olaf message 06/10/19 02:28)
"They should be available with any self-respecting SANE frontend.
These options are not marked as advanced."
But, I'm not sure that
is really what you are looking for. Can you explain exactly what you are
trying to do?
aloha allan
well i guess i'm a lazy bad typist, so i'd like a way to tweak scanimage
defaults at runtime without having to construct a long complex command line.
i'm experimenting right now with --mode=color as the default is gray, but
really i'd probably change -x and -y if this feature really works
so far no joy -=- seems sanei_configure_attach never enters into the
/* search for a matching descriptor */ loop
ras
allan
On Tue, Jun 11, 2019, 6:34 PM r. a. schmied <[email protected]> wrote:
Povilas Kanapickas wrote:
Hi,
On 2019-06-10 19:26, r. a. schmied wrote:
saners
in particular genesys_gl847
a query or two about <backend>.conf file
1) do all, most, some backends support such runtime argument
alterations?
Looks like the genesys backend reads this genesys.conf configuration
file by calling sanei_configure_attach. It's called by 10 backends, so I
suppose that many backends support this functionality.
2) i see scanimage is checking for and reading ./genesys.conf
and /opt/csw/etc/sane.d/genesys.conf
3) i've tried to enter options in ./genesys.conf, but have
not been able to get them to a) work or b) cause an
error or warning. is there anyplace in the sane documentation
world that defines/describes the format for these arguments
placed in a <backend.conf> file?
i seem to think i've seen something like that but i'm not
able to re-find it! rtfm'ed sane.7, scanimage, sane-genesys
sane-test and grep'ed around looking for '\.conf'
ah-ha! sane-u12 -- but those lines don't work either
tried lots of variations including
option='flag:arg'
option flag arg
option -flag=arg
option="-flag arg"
I don't know this area at all, but from the documentation of
sanei_configure_attach:
'''
Parse configuration file, reading configuration options and trying to
attach devices found in file.
The option are gathered in a single configuration structure. Each time a
line holds a value that is not an option, the attach function is called
with the name found and the configuration structure with it's current
values.
'''
The reason you're not seeing any error messages is that their severity
is low. Try setting SANE_DEBUG_SANEI_CONFIG=8 environment variable
before running scanimage.
if anyone provides guidance even if pointer(s) to relevant code
i will take/make time to write-up a manpageish file and submit
for incorporation ...
That would be great, thank you.
Regards,
Povilas
Povilas and interested saners
so it looks to me like the genesys usb conf file is not consistent
with the processing expected and coded in sanei_configure_attach
(sanei/sanei_config.c)
seems sanei_configure_attach looks only for the token 'option' and
when finding 'usb 0x04a9 0x1905' or any of the other lines it calls
attach. why it fails to recognize the option lines in ./genesys.conf
is still unclear maybe my sun sol10 is using a broken strncmp
-- so i need to check that
what attach does or attempts to do is still to be determined.
notice that the u12.conf file (example) has usb in sqr brackets [usb]
and then lists option lines. plus the test.conf file as an example
does not include the token 'option' at all, instead listing the
option name followed by the option value to use.
still looking ...
ras
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