GDBus has always supported matching strings with arg0 matching
(`G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH`). In D-Bus 1.5, support was added
to the spec for also matching object paths. This got forgotten about and
was never added to GDBus, meaning that
`G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_PATH` won’t match against a signal arg0
of type `o`.
Fix that, and add a unit test.
To do so, we need to add a new `g_dbus_message_get_arg0_path()` API to
complement the existing `g_dbus_message_get_arg0()` API. The approach of
letting `g_dbus_message_get_arg0()` return an object-path *or* a string
would not work, as it’s also called in the implementation of
`G_DBUS_SIGNAL_FLAGS_MATCH_ARG0_NAMESPACE`, which must only match
string-typed arg0 values and not object-path-typed ones.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Fixes: #3183
Technically we can’t rely on it being kept alive by the `message->body`
pointer, unless we can guarantee that the `GVariant` is always
serialised. That’s not necessarily the case, so keep a separate ref on
the arg0 value at all times.
This avoids a potential use-after-free.
Spotted by Thomas Haller in
https://gitlab.gnome.org/GNOME/glib/-/merge_requests/3720#note_1924707.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3183
It was previously 4KiB, but this isn’t enough for sniffing the
content-type of some GPT disk images (they use 4KiB sectors, and the
magic bytes are in the second sector). A buffer of 8KiB would work,
but 16KiB seems harmless and more future proof.
Most of the time, the buffer size should be set by xdgmime anyway, based
on the largest sniff buffer its database needs. Currently (with
shared-mime-info master) that’s 18730 bytes, so even with a 16KiB buffer
we’re going to potentially mis-identify a few file types.
Tested manually by modifying the example GPT image from shared-mime-info
(https://gitlab.freedesktop.org/xdg/shared-mime-info/-/blob/master/tests/mime-detection/disk.gpt)
to remove the magic at offset 0x200 and add it instead at offset 0x1000,
then running:
```
cp shared-mime-info.git/tests/mime-detection/disk.gpt ./disk-without-extension
gio info -a standard::content-type ./disk-without-extension
```
It should print `application/vnd.efi.img` rather than
`application/octet-stream`.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Fixes: #3186
This fixes a stack overflow reported by a user who had both the
definition of text/javascript from shared-mime-info 2.3 and the
definition of text/javascript from shared-mime-info 2.4 installed at the
same time. In 2.3, text/javascript is a subtype of
application/ecmascript, but in 2.4 application/ecmascript is a subtype
of text/javascript. Having both at the same time resulted in circular
inheritance.
The new logic keeps a list of all parents that have already been
checked, which is more comprehensive than the old workaround that was
implemented in commit 38869ece2 ("xdgmime: Prevent infinite loops from
badly-formed MIME registrations").
https://bugs.archlinux.org/task/80279
This fixes a load of warnings about ‘multiple comment blocks documenting
<something> identifier’.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3037
Move it to a separate page, since it doesn’t quite make sense to
incorporate into the `GDBusConnection` docs.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3037
Move it to a separate page, as there isn’t a `GIOScheduler` struct.
Ensure that all its functions/methods/types are correctly marked as
deprecated. Fix a few broken links about I/O priority which pointed to
it.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3037
Move it to a separate content page as there is no `GDBusIntrospection`
type to hang the rest of the documentation off.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3037
Adding it all to the docs for the `GDBusError` enum seemed a bit much,
so I moved it to its own content page.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3037
The `g_content_type_guess_for_tree` function segfaults currently when
processing filenames that are not valid unicode strings. Let's use the
`g_filename_to_utf8` and `g_utf8_make_valid` functions before other
processing to prevent that.
Let's also add a test for it to avoid this in future.
Fixes: https://gitlab.gnome.org/GNOME/glib/-/issues/3168
g_option_context_parse()/g_application_run()/g_test_init() for
convenience also call g_set_prgname(), when the prgname is unset at this
point. This was racy.
Fix the race by using an atomic compare-and-exchange and only reset the
value, if it is unset still.
When `--attributes` is specified and doesn’t include `standard::name` in
its list, `gio` would print a critical warning from the (mandatory) call
to `g_file_info_get_name()`.
Fix that by making the call to `g_file_info_get_name()` optional.
Add a unit test too.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Fixes: #3158
It gives nowhere near full coverage, but it’s something we can build on
in future.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3158
Helps: #2950
Modify all the similar Python test wrappers to set
`G_DEBUG=fatal-warnings` in the environment of the program being tested,
so we can catch unexpected warnings/criticals.
Adding this because I noticed it was missing, not because I noticed a
warning/critical was being ignored.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
If the help output is explicitly requested by the user, it’s
conventional for it to be printed to stdout rather than stderr.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Store their details in an array which can be iterated over instead.
This introduces no functional changes, just a cleanup which will allow
following commits to be neater.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
If she socket is dispatched at exactly the previously set ready time,
it should already be considered to have timed out. This can easily
happen in practice when using a low resolution timer.
This fixes a test failure on GNU/Hurd, see
https://gitlab.gnome.org/GNOME/glib/-/issues/3148
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
The test only needs a unidirectional channel, and a pipe is sufficient
for that.
This may simplify things when running the test on Hurd; see
https://gitlab.gnome.org/GNOME/glib/-/issues/3148#note_1874198.
Additionally, set `O_NONBLOCK` on the pipe since the test seems to
expect that partial writes will succeed and that writes to a full buffer
will fail rather than block.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3148
Various parts of the build (such as `objectmanager-rst-gen`) depend on
running `gdbus-codegen` after it’s been built, but they currently only
encode a dependency to the main codegen Python file and not the
supporting files. This can cause `gdbus-codegen` to fail with an
`ImportError` if the build races so that `objectmanager-rst-gen` is
built before the codegen supporting files.
Example failure here: https://gitlab.gnome.org/pwithnall/glib/-/jobs/3266471
```
FAILED: gio/tests/gdbus-object-manager-example/objectmanager-rst-gen-org.gtk.GDBus.Example.ObjectManager.Animal.rst gio/tests/gdbus-object-manager-example/objectmanager-rst-gen-org.gtk.GDBus.Example.ObjectManager.Cat.rst
/usr/bin/python3 gio/gdbus-2.0/codegen/gdbus-codegen --interface-prefix org.gtk.GDBus.Example.ObjectManager. --generate-rst objectmanager-rst-gen --output-directory gio/tests/gdbus-object-manager-example ../gio/tests/gdbus-object-manager-example/gdbus-example-objectmanager.xml
Traceback (most recent call last):
File "/builds/pwithnall/glib/_build/gio/gdbus-2.0/codegen/gdbus-codegen", line 53, in <module>
from codegen import codegen_main
File "/builds/pwithnall/glib/_build/gio/gdbus-2.0/codegen/codegen_main.py", line 29, in <module>
from . import dbustypes
File "/builds/pwithnall/glib/_build/gio/gdbus-2.0/codegen/dbustypes.py", line 22, in <module>
from . import utils
ImportError: cannot import name 'utils' from 'codegen' (/builds/pwithnall/glib/_build/gio/gdbus-2.0/codegen/__init__.py)
```
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
All the calls to `usage()` are immediately followed by a `return` from
`main()` which sets an appropriate exit status.
Calling `exit()` early means that running `gio --help` returns exit
status 1, which is incorrect — it should (by convention) return 0.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Depending on the operating system, /bin/sh might either be bash (for
example on Fedora or Arch) or dash (for example on Debian or Ubuntu)
or some other POSIX shell.
When bash is asked to run a simple command with no shell keywords or
metacharacters, like this one, it replaces itself with the program
via execve(), but dash does not have that optimization and treats it
like any other program invocation in a larger script: it will fork,
exec the program in the child, and wait for the child in the parent.
This seems like it conflicts with sleep_and_kill() assuming that it can
use the subprocess's process ID as the sleep(1) process ID. Specifically,
if it sends SIGKILL, it will go to the sh(1) process and not the sleep(1)
child, which could result in the sh(1) process being terminated and
its sleep(1) child being leaked.
To get the bash-like behaviour portably, explicitly use the exec builtin
to instruct the shell to replace itself with sleep(1), so that the
process ID previously used for the shell becomes the process ID of the
sleep process.
This appears to resolve an intermittent hang and test timeout on Debian
machines (especially slower ones), although I'm not 100% clear on the
mechanics of how it happens.
Resolves: https://gitlab.gnome.org/GNOME/glib/-/issues/3157
Signed-off-by: Simon McVittie <smcv@collabora.com>
`test-generated.txt` is listed in `test.gresource.xml`, so it needs to
be specified as a dependency in the `custom_target()` which uses
`test.gresource.xml`.
Fixes intermittent build failures like:
```
FAILED: gio/tests/test.gresource
/builds/GNOME/glib/_build/gio/glib-compile-resources --compiler=gcc --target=gio/tests/test.gresource --sourcedir=/builds/GNOME/glib/gio/tests --sourcedir=/builds/GNOME/glib/_build/gio/tests --internal ../gio/tests/test.gresource.xml
../gio/tests/test.gresource.xml: Failed to locate test-generated.txt in any source directory.
```
See !3671 and #3163.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
This reverts commit 0b9900e4e7.
The dependency was added in the wrong place: `test-generated.txt` is
needed when compiling `test.gresource`, not when compiling the test
which ultimately uses that gresource.
See !3671 and #3163.
The PTRACE_O_EXITKILL symbol in sys/ptrace.h is an enum member, not
a macro. The #ifdef check added to the GSubprocess test-case in
272ec5dbca will not detect it.
Use cc.has_header_symbol() to properly detect it. According to the
documentation: "Symbols here include function, variable, #define,
type definition, etc.".
Fixes: 272ec5dbca
Closes: https://gitlab.gnome.org/GNOME/glib/-/issues/3156
On CHERI-enabled systems we use uintptr_t as the underlying storage for
GType and therefore casting to gsize strips the upper bits from a pointer.
Fix this by casting via uintptr_t instead and introduce a new set of
macros to convert between GType and pointers.
It needs to be in a separate page because there isn’t actually a
`GFileAttribute` type.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3037
Move it to the struct docs, although again this is a little suspect
because there is actually no `GDBusAddress` struct/type.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3037
This might not work, as `GContentType` isn’t actually a defined type
(content types are just strings). It would be a bit weird to create a
separate page for content types, though, as the functions handling them
are very method-like and feel like they should be grouped together like
methods of a class.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3037
Currently, the introspection data for GLib and its sub-libraries is
generated by gobject-introspection, to avoid the cyclic dependency
between the two projects.
Since gobject-introspection is generally available on installed systems,
we can check for its presence, and generate the introspection data
directly from GLib.
This does introduce a cyclic dependency, which is why it's possible to
build GLib without introspection, then build gobject-introspection, and
finally rebuild GLib.
By having introspection data available during the GLib build, we can do
things like generating documentation; validating newly added API; and
close the loop between adding new API and it becoming available to non-C
consumers of the C ABI (i.e. language bindings).
If `update-desktop-database` or `update-mime-database` are not
installed, there are a few `GAppInfo` methods for modifying file
associations which will print a `g_warning()` when called. Something
like:
```
GLib-GIO-FATAL-WARNING: Failed to execute child process ‘update-desktop-database’ (No such file or directory)
```
(Example: https://gitlab.gnome.org/zamaudio/glib/-/jobs/3190053)
This will cause the appinfo/associations test to fail, as warnings are
fatal.
If that’s going to happen, skip the test. We can’t hard-depend on these
tools as they are external to GLib and only needed for a few operations.
Instead we have a soft runtime dependency on them; that should be
reflected in the tests.
Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>
Helps: #3148
Commit f6c40b1d fixed libelf detection on FreeBSD (where the library has
no pkg-config file and needs to be found via `find_library()`), but
broke `-Dlibelf=disabled` on Linux, as `get_option('libelf')` was no
longer checked.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Fixes: #3120
