This commit unsubscribes CUPS backend from a DBus
signal in idle when listening for new items on Avahi.
Since GDBus emits gathered signals in idle while
checking whether the signal has been unsubscribed
it could happen that a signal was not processed
because it was removed from hash table of
subscribed signals.
This caused the situation where printers advertised
on Avahi were not listed in CUPS backend sometimes.
We need those signals since this happens when switching
from a general subscription which listens to signals
for all Avahi services to a specific one which listens
to just _ipp._tcp and _ipps._tcp (chicken and egg problem).
This change extends set of Avahi advertised printers which
works with Gtk's CUPS print backend.
It creates a temporary queue (local printer) for each
Avahi printer in CUPS instead of accessing them directly
(via CUPS library).
This makes some printers work which did not work before and
also gives users more options to change in the print dialog.
This also changes naming of printers to be in accordance with CUPS.
It uses '_' instead of '-' and has hostname appended for CUPS remote
printers.
At least from GTK v3.22.30, the code disallows attempts to print PDF and
PS files using the LPR backend. Although it is not easy or possible for
GTK to determine if the printer can print these formats by querying lpr,
the print backend should allow lpr to try.
There are two uses cases:
- A filter is being used by lpr, specified in the printcap file, to process the
files prior to printing them.
- The printer can print PDF and PS files directly. There are many printers that
can print these formats, so GTK should allow for the possibility.
CUPS uses resource paths in the form of "printers/printer_name"
or "classes/class_name" so it is enough to remove the "printers/"
or "classes/" prefix and use the string behind it as a name.
There was recently introduced a wrong check for the prefix.
This commit fixes it in the way it was originally intended.
This reverts commit ee448db031.
The `name_suffix` argument is already set, and by setting it twice we're
just getting a warning at configuration time from Meson.
printer_name_compressed_strv is NULL-terminated array
of gchar*, which means N+1 memory should be allocated.
Otherwise, if the printer name has no empty components
(which is usually the case), printer_name_compressed_strv[N],
which should contain the NULL sentinel, will actually lie
just outside of allocated memory, which is UB.
In my case, it led to crashes inside g_strjoinv
when Print... dialog is opened in evince.
#0 0x00007fad2ce1bad7 in __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
#1 0x00007fad2d04d88d in g_strjoinv (separator=separator@entry=0x7fad0c9bc508 "-", str_array=str_array@entry=0x556b017f0200) at ../glib-2.60.7/glib/gstrfuncs.c:2585
#2 0x00007fad0c9b8a89 in avahi_service_resolver_cb (source_object=<optimized out>, res=<optimized out>, user_data=0x7fad08020ee0) at /var/tmp/portage/x11-libs/gtk+-3.24.13/work/gtk+-3.24.13/modules/printbackends/cups/gtkprintbackendcups.c:3223
#3 0x00007fad2d1f8ed3 in g_task_return_now (task=0x556b017a8b00 [GTask]) at ../glib-2.60.7/gio/gtask.c:1209
#4 0x00007fad2d1f987d in g_task_return (task=0x556b017a8b00 [GTask], type=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1278
#5 0x00007fad2d1f9dec in g_task_return (type=G_TASK_RETURN_SUCCESS, task=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1678
#6 0x00007fad2d1f9dec in g_task_return_pointer (task=<optimized out>, result=<optimized out>, result_destroy=<optimized out>) at ../glib-2.60.7/gio/gtask.c:1683
#7 0x00007fad2d24b6af in g_dbus_connection_call_done (source=<optimized out>, result=0x556b017a8bc0, user_data=0x556b017a8b00) at ../glib-2.60.7/gio/gdbusconnection.c:5747
#8 0x00007fad2d1f8ed3 in g_task_return_now (task=0x556b017a8bc0 [GTask]) at ../glib-2.60.7/gio/gtask.c:1209
#9 0x00007fad2d1f8f09 in complete_in_idle_cb (task=0x556b017a8bc0) at ../glib-2.60.7/gio/gtask.c:1223
#10 0x00007fad2d02d2c0 in g_main_dispatch (context=0x556b00eee090) at ../glib-2.60.7/glib/gmain.c:3189
#11 0x00007fad2d02d2c0 in g_main_context_dispatch (context=context@entry=0x556b00eee090) at ../glib-2.60.7/glib/gmain.c:3854
#12 0x00007fad2d02d658 in g_main_context_iterate (context=context@entry=0x556b00eee090, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib-2.60.7/glib/gmain.c:3927
#13 0x00007fad2d02d6df in g_main_context_iteration (context=context@entry=0x556b00eee090, may_block=may_block@entry=1) at ../glib-2.60.7/glib/gmain.c:3988
#14 0x00007fad2d22248d in g_application_run (application=0x556b0116f130 [EvApplication], argc=<optimized out>, argv=<optimized out>) at ../glib-2.60.7/gio/gapplication.c:2519
#15 0x0000556b002e55a1 in ()
#16 0x00007fad2ccd6f1b in __libc_start_main (main=0x556b002e50d0, argc=2, argv=0x7ffe1057fa88, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe1057fa78) at ../csu/libc-start.c:308
#17 0x0000556b002e567a in ()
(gdb) p printer_name_compressed_strv[0]
$4 = (gchar *) 0x556d4a4be430 "Brother"
(gdb) p printer_name_compressed_strv[1]
$5 = (gchar *) 0x7f9dbc011090 "MFC"
(gdb) p printer_name_compressed_strv[2]
$6 = (gchar *) 0x556d4a51ba50 "7860DW"
(gdb) p printer_name_compressed_strv[3]
$7 = (gchar *) 0x401 <error: Cannot access memory at address 0x401>
Create printer name from name of the advertised service
for standalone IPP printers as opposed to CUPS printers
advertised via Avahi which get name from their
resource path.
This is similar to what cups-filters does.
Pass GtkPrinter class to request for printer info
so that it does not need to be searched for
(such search could fail for standalone IPP printers).
https://gitlab.gnome.org/GNOME/gtk/issues/1509
Set reasonable default values for printers discovered
by Avahi which do not have 'printer-type' attribute.
This is the case for network printers which were not
published by CUPS.
Related to the issue #1509.
On MacOS the shared library and loadable module suffix is different.
While dlopen will load a shared module just fine, Gtk's loader and
query tools don't know to look for them so it's important to give
loadable modules the .so suffix.
We were looking for the cups headers and the cups lib in the default locations
which for example breaks with OpenBSD where the cups headers are under /usr/local/include/
Instead just use the "cups" dependency type from meson which internally uses cups-config.
Fixes#1967
In 9236ee0564 the cups code was updated to use newer API with cups >= 2
and a later commit (a7e207abe) dropped the old code paths and added version
checks in meson/autotools.
The newly used functions were httpConnect2 and httpReconnect2 which are
available since 1.7 and don't require cups 2.0.
Change the versions checks to 1.7 instead so gtk can still be build with
older cups (macOS 10.9 for example, see #1950)
httpGetAuthString() was added with cups 1.3 and we depend on a newer version
now. The direct field access was a fallback in case httpGetAuthString()
was missing, so this can also be dropped.
The http* family of functions was deprecated after CUPS 1.7. We can
conditionally use it when built against a newer version of CUPS. The
additional parameters are taken directly from the fallback values
inside CUPS itself.
Various adjustments to make the config.h output between autotools
and meson more similar by testing on Linux and Windows/MSYS2.
Setting things to 1 instead of true and shifting things around is motivated
by reducing the diff between the generated files.
This changes the configure option into two states:
auto: build all that can be build (default)
A list of backend names: build them and fail if we can't
"papi" is missing because it's not in Debian and I can't test it.
When using strncpy() with a buffer we need to account for the
terminating NUL character. GCC 8 started warning when using PPD_MAX_NAME
as the buffer length for strncpy() because the buffer we're copying into
has the same length — which means that the terminating NUL may be
skipped if the source string has a length of PPD_MAX_NAME.
The appropriate way to handle the case where we're copying a source with
a length bigger than of PPD_MAX_NAME is, as reported in the strncpy()
documentation, to copy `PPD_MAX_NAME - 1` bytes, and explicitly NUL
terminate the destination buffer. This has the additional benefit of
avoiding the compiler warning.
to retreive paper size specific hard margins and use this
to set the hard margins in the print context.
(modified by Marek Kasik <mkasik@redhat.com>)
https://bugzilla.gnome.org/show_bug.cgi?id=686109
Check UUID for printers obtained via DNSSD whether
they are already installed on local CUPS server.
Don't show such printers.
Not all printers published via DNSSD have UUID entry though.
https://bugzilla.gnome.org/show_bug.cgi?id=786794
We are currently truncating job names to 255 bytes, because that's the
maximum allowed length of job-name attribute in CUPS. This is a CUPS
limitation that GtkPrintOperation shouldn't need to know, and it
shouldn't affect other backends, that might have other limitations or
even no limitation at all. This has another side effect, that what you
set as GtkPrintOperation:job-name could be different to what you get if
the property is truncated, this is not documented in
gtk_print_operation_set_job_name(). So, I think the job name should be
truncated by the CUPS backend, right before setting the job-name
attribute.
https://bugzilla.gnome.org/show_bug.cgi?id=774097
The previous patches didn't mark some strings as to be translated, and
tried to translate strings with a variable part already inside the
string, which isn't going to work.
Mark the strings as translatable with context, and also make sure to
translate static strings when getting them out of their structure.
https://bugzilla.gnome.org/show_bug.cgi?id=764585
Some of the translated strings in the cups printbackend are short
and generic and might occur in other contexts. Give them disambiguating
message contexts to avoid translation problems.
In order to retrieve the user options for a printer, the respective
printer name is used.
This fixes the comparison of printer names to avoid that the options of
another printer are accidently read whose name starts with the same
letters, but is longer (e.g. "myprinterlongername" instead of
"myprinter").
This fixes Bug 753628.
"Yo, we heard you like traversing NULL-terminated arrays to operate on
them, so we called g_strv_length() as the for condition, so you can
iterate the array while iterating the array."
Instead of making famed rapper and television producer Xzibit proud, we
should avoid calling g_strv_length() on an array while looping on the
array, to avoid quadratic complexity.
We do this in various places that deal with arrays of strings that we
cannot really guess are short enough not to matter — e.g. the list of
CSS selectors in the inspector, or the required authentication
information for printing.
Request "output-bin-supported" and "output-bin-default" attributes through
IPP if there is no PPD for selected printer.
Pass "output-bin" option with other options in printer_get_options().
Translate standard IPP values of "output-bin" option.
https://bugzilla.gnome.org/show_bug.cgi?id=725441
Add parameter for specification of port to gtk_cups_connection_cups_new().
Use default port returned by ippPort() if the given port is lower than 0.
https://bugzilla.gnome.org/show_bug.cgi?id=693738
If auth_info_required is only set to "negotiate" the
request password dialog is shown anyway for each print
job without any input fields. As the request_password
dialog only handles username, password and domain.
https://bugzilla.gnome.org/show_bug.cgi?id=669008
