Add a new G_TEST_OPTIONS_ISOLATE_XDG_DIRS option for g_test_init() which
automatically creates a temporary set of XDG directories, and a
temporary home directory, and overrides the g_get_user_data_dir() (etc.)
functions for the duration of the unit test with the temporary values.
This is intended to better isolate unit tests from the user’s actual
data and home directory. It works with g_test_subprocess(), but does not
work with subprocesses spawned manually by the test — each unit test’s
code will need to be amended to correctly set the XDG_* environment
variables in the environment of any spawned subprocess.
“Why not solve that by setting the XDG environment variables for the
whole unit test process tree?” I hear you say. Setting environment
variables is not thread safe and they would need to be re-set for each
unit test, once worker threads have potentially been spawned.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://gitlab.gnome.org/GNOME/glib/issues/538
Add a new internal function, g_set_user_dirs(), which will safely
override the values returned by g_get_user_data_dir() and friends, and
the value returned by g_get_home_dir().
This is intended to be used by unit tests, and will be hooked up to them
in a following commit.
This can be called as many times as needed by the current process. It’s
thread-safe. It does not modify the environment, so none of the changes
are propagated to any subsequently spawned subprocesses.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://gitlab.gnome.org/GNOME/glib/issues/538
This is a utility function which I find myself writing in a number of
places. Mostly in unit tests.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
This is along the same lines as g_assert_cmpstr(), but for variants.
Based on a patch by Guillaume Desmottes.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://gitlab.gnome.org/GNOME/glib/issues/1191
This allows higher levels to have more control over resolving
(ipv4 or ipv6 for now) which allows for optimizations such
as requesting both in parallel as RFC 8305 recommends.
<link> can only be used for links to DocBook IDs. <ulink> is for URI
links. (Why does it have to be this complex?)
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Similarly to g_source_set_name(), this sets a name on a GTask for
debugging and profiling. Importantly, this name is propagated to the
GSource for idle callbacks for the GTask, ending the glorious reign of
`[gio] complete_in_idle_cb`.
The name can be queried using g_task_get_name(). Locking is avoided by
only allowing the name to be set before the GTask is used from another
thread.
Includes tests.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Currently, there isn't API to determine root path for mounts created
over bind operation (or btrfs subvolumes). This causes issues to our
volume monitors if there is multiple mounts for one device, which can
happen with libmount-based implementation currently. Let's propagate
root path from libmount over g_unix_mount_get_root_path, so we can
handle this somehow in our volume monitors.
https://gitlab.gnome.org/GNOME/glib/issues/1271
This is a variant of g_utf8_validate() which requires the length to be
specified, thereby allowing string lengths up to G_MAXSIZE rather than
just G_MAXSSIZE.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Previously, GVariant has allowed ‘arbitrary’ recursion on GVariantTypes,
but this isn’t really feasible. We have to deal with GVariants from
untrusted sources, and the nature of GVariantType means that another
level of recursion (and hence, for example, another stack frame in your
application) can be added with a single byte in a variant type signature
in the input. This gives malicious input sources far too much leverage
to cause deep stack recursion or massive memory allocations which can
DoS an application.
Limit recursion to 128 levels (which should be more than enough for
anyone™), document it and add a test. This is, handily, also the limit
of 64 applied by the D-Bus specification (§(Valid Signatures)), plus a
bit to allow wrapping of D-Bus messages in additional layers of
variants.
oss-fuzz#9857
Signed-off-by: Philip Withnall <withnall@endlessm.com>
The X-Flatpak-RenamedFrom key is used in .desktop files to identify past
names for the desktop file. It is defined to be a list of strings.
However, there was previously no correct way to retrieve a list of
strings from the GKeyFile wrapped by GDesktopAppInfo, short of
re-parsing the file with GKeyFile.
Note that doing something like:
g_strsplit (g_desktop_app_info_get_string (...), ";", -1)
is not correct: the raw value "a\;b;" represents the one-element list
["a;b"], but g_key_file_get_string() rejects the sequence "\;", and so
g_desktop_app_info_get_string() returns NULL in this case. (Of course, a
.desktop file with a semicolon in its name is a pathological case.)
Add g_desktop_app_info_get_string_list(), a trivial wrapper around
g_key_file_get_string_list(), similar to g_desktop_app_info_get_string()
and co.
The change from g_key_file_free() to g_key_file_unref() in the test is
needed because g_key_file_free() clears the contents of the keyfile.
This is fine for all the fields which are eagerly loaded and copied into
GDesktopAppInfo, but not when we want to access arbitrary stuff from the
keyfile.
This is detected by Debian's Lintian tool, which suggests
"allows one to" as a replacement. I've rephrased the documentation
in question to avoid both of those.
Signed-off-by: Simon McVittie <smcv@collabora.com>
Expands to the GNU C fallthrough statement attribute if the compiler is gcc.
This allows declaring case statement to explicitly fall through in switch
statements. To enable this feature, use -Wimplicit-fallthrough during
compilation.
There are many cases where a default TLS database is not able to be
defined within the constraints of a system. For example glib-networking
(or glib-openssl) cannot retrieve the default certificate store on iOS
or Android and need to be initialized from a cert file of certificates
bundled with the application.
Previously GStreamer was relying on a custom patch to glib-networking to
populate the default database from the file pointed to by the
CA_CERTIFICATES environment variable however the mechanism that enabled
this was recently remove from glib-networking.
Adding a more generic g_tls_backend_set_default_database() API allows
application developers to override the default database using their own
certificates as well as allowing equivalent functionality on Android/iOS
(or others) as on the default database handling Linux.
Fixes https://gitlab.gnome.org/GNOME/glib-networking/issues/35
The goal of this commit is to reduce differences between the autotools and meson build.
With autotools AC_FUNC_ALLOCA was used which defines HAVE_ALLOCA_H, HAVE_ALLOCA,
C_ALLOCA. meson tried to replicate that with has_function() but alloca can be a macro
and and is named _alloca under Windows. Since we require a working alloca anyway
and only need to know if the header exists replace AC_FUNC_ALLOCA with a simple
AC_CHECK_HEADERS.
There is still one user of HAVE_ALLOCA in the embedded gnulib, but since alloca is
always provided through galloca.h just force define HAVE_ALLOCA there and add a comment.
The docs were mentioning alloca as an example for cross compiling. Since that variable no
longer exists now replace it with another one.
They should either be generated at build time, or ignored completely,
depending on the presence of --[enable|disable]-man.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
A lot of GLib APIs provide a string length and explicitly say that the strings
are not NUL terminated. For instance, parsing XML using GMarkupParser or
reading packed binary strings from mmapped data files.
The last part of the reference counting saga.
Now that we have:
- reference counter types
- reference counted allocations
we can finally add reference counted strings using reference counted
allocations to avoid creating a new String type, and reimplementing
every single string-based API.
GArcBox is the atomic reference counting version of GRcBox. Unlike
GRcBox, the reference acquisition and release on GArcBox are guaranteed
to be atomic, and thus they can be performed from different threads.
This is similar to Rust's Arc<Box<T>> combination of traits.
It is useful to provide a "reference counted allocation" API that can
add reference counting semantics to any memory allocation. This allows
turning data structures that usually are placed on the stack into memory
that can be placed on the heap without:
- adding a public reference count field
- implementing copy/free semantics
This mechanism is similar to Rust's Rc<Box<T>> combination of traits,
and uses a Valgrind-friendly overallocation mechanism to store the
reference count into a private data segment, like we do with GObject's
private instance data.
meson.build was already passing --rebuild-types option but not
Makefile.am. Copy the IGNORE_HFILES list from meson.build because it was
outdated in Makefile.am and it's causing build issues when using the
generated gio.types file because it would contain win32 types when
building on linux.
Add an app-launching function which allows standard file descriptors
to be passed to the child process.
This will be used by gnome-shell to pass systemd journal descriptors
as stdout/stderr. gnome-shell's child_setup function can then be
eliminated, which will enable use of the posix_spawn optimized
gspawn codepath for desktop app launching.
Add a new process spawning function variant which allows the caller
to pass specific file descriptors for stdin, stdout and stderr.
It is otherwise identical to g_spawn_async_with_pipes.
Allow the same fd to be passed in multiple parameters. To make this
workable, the child process logic that closes the fd after the first time
it has been dup2'ed needed tweaking; we now just set those fds to be
closed upon exec using the CLOEXEC flag. Add a test for this case.
This will be used by gnome-shell to avoid performing equivalent
dup2 actions in a child_setup function. Dropping use of child_setup will
enable use of an upcoming optimized process spawning codepath.
These generate basic .c and .h files containing the GDBusInterfaceInfo
for a D-Bus introspection XML file, but no other code (no skeletons,
proxies, GObjects, etc.).
This is useful for projects who want to describe their D-Bus interfaces
using introspection XML, but who wish to implement the interfaces
manually (for various reasons, typically because the skeletons generated
by gdbus-codegen are too simplistic and limiting). Previously, these
projects would have had to write the GDBusInterfaceInfo manually, which
is painstaking and error-prone.
The new --interface-info-[body|header] options are very similar to
--[body|header], but mutually exclusive with them.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=795304
We have a common pattern for reference counting in GLib, but we always
implement it with ad hoc code. This is a good chance at trying to
standardise the implementation and make it public, so that other code
using GLib can take advantage of shared behaviour and semantics.
Instead of simply taking an integer variable, we should create type
aliases, to immediately distinguish the reference counting semantics of
the code; we can handle mixing atomic reference counting with a
non-atomic type (and vice versa) by using differently signed values for
the atomic and non-atomic cases.
The gatomicrefcount type is modelled on the Linux kernel refcount_t
type; the grefcount type is added to let single-threaded code bases to
avoid paying the price of atomic memory barriers on reference counting
operations.
It's mostly not used anymore and doesn't do what it says it does.
The docs state that it affects GList, GSList, GNode, GMemChunks, GSignal,
GType n_preallocs and GBSearchArray while:
* GList, GSList and GNode use GSlice and are not affected
* GMemChunks is gone
* GType npreallocs is ignored
It also states that it can be used to force the usage of g_malloc/g_free,
which is handled by G_SLICE=always-malloc now.
The only places where it's used is in signal handling through GBSearchArray
and in GValueArray (deprecated). Since it's unlikely that anyone wants to
reduce allocation sizes just for those cases remove the build option.
ENABLE_GC_FRIENDLY_DEFAULT was supposed to set the default for the gc friendliness
while still allowing to force enable it at runtime with G_DEBUG=gc-friendly.
With commit 943a18b564 (6 years ago) things were changed to always set it
according to the content of G_DEBUG in glib_init(), making the default unused.
Since nobody complained since then just remove the macro and the build option.
Add a test macro that allows comparing two floating point values for
equality within a certain tolerance.
This macro has been independently reimplemented by various projects:
* Clutter
* Graphene
* colord
https://gitlab.gnome.org/GNOME/glib/issues/914
It's a synonym of G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE.
It doesn't change anything except not feeling dirty from using a wrongly
prefixed constant for the object type.
See: #182
GVfsUDisks2VolumeMonitor handles x-gvfs-hide/x-gvfs-show mount options
used to overwrite our heuristics whether the mount should be shown, or
hidden. Unfortunately, it works currently only for mounts with
corresponding fstab entries, because the options are read over
g_unix_mount_point_get_options. Let's introduce g_unix_mount_get_options
to allow reading of the options for all sort of mounts (e.g. created
over pam_mount, or manually mounted).
(Minor fixes to the documentation by Philip Withnall
<withnall@endlessm.com>.)
https://bugzilla.gnome.org/show_bug.cgi?id=668132
This is a combination of g_hash_table_lookup_extended() and
g_hash_table_steal(), so that users can combine the two to reduce code
and eliminate a pointless second hash table lookup by
g_hash_table_steal().
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=795302
Getting the canonical filename is a relatively common
operation when dealing with symbolic links.
This commit exposes GLocalFile's implementation of a
filename canonicalizer function, with a few additions
to make it more useful for consumers of it.
Instead of always assuming g_get_current_dir(), the
exposed function allows passing it as an additional
parameter.
This will be used to fix the GTimeZone code to retrieve
the local timezone from a zoneinfo symlink.
(Tweaked by Philip Withnall <withnall@endlessm.com> to drop g_autofree
usage and add some additional tests.)
https://bugzilla.gnome.org/show_bug.cgi?id=111848
For a long time we've had it as 'common knowledge' that criticals are
for programmer errors and warnings are for external errors, but we've
never documented that. Do so.
(Modified by Philip Withnall <withnall@endlessm.com> to apply cleanly to
master; rearranged to fit in with current master documentation.)
https://bugzilla.gnome.org/show_bug.cgi?id=741049
This is a non-trivial accessor which gets the identifier string used to
create the GTimeZone — unless the string passed to g_time_zone_new() was
invalid, in which case the identifier will be `UTC`.
Implementing this required reworking how timezone information was loaded
so that the tz->name is always set at the same time as tz->t_info, so
they are in sync. Previously, the tz->name was unconditionally set to
whatever was passed to g_time_zone_new(), and then not updated if the
tz->t_info was eventually set to the default UTC information.
This includes tests for the new g_time_zone_get_identifier() API, and
for the g_date_time_get_timezone() API added in the previous commit.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=795165
This is a bit awkward. A more elegant solution would have
ignored *all* headers and then *un-ignored* some of them
if some conditions were met.
Sadly, we cannot really ignore all headers and then "unignore"
them: that's not how arrays in Meson work.
https://bugzilla.gnome.org/show_bug.cgi?id=794557
Similarly to how glib-compile-resources can call xmllint to eliminate
whitespace in XML files to reduce their size inside a GResource, we can
use json-glib-format to achieve the same result.
The mechanism for using json-glib-format is the same, with a separate
environment variable if we want to direct glib-compile-resources to a
version of json-glib-format that is not the one in the PATH.
https://bugzilla.gnome.org/show_bug.cgi?id=794284
g_key_file_get_locale_string() returns a translated string from the
keyfile. In some cases, it may be useful to know the locale that that
string came from.
Add a new API, g_key_file_get_locale_for_key(), that returns the locale
of the string.
Include tests.
(Modified by Philip Withnall to rename the API and fix some minor review
issues. Squash in a separate test case commit.)
https://bugzilla.gnome.org/show_bug.cgi?id=605700
Recent changes has extended the functionality of `gdbus-codegen`
by implementing new options.
This patch extends the documentation including the behaviour of
the new options along the old ones.
(Wording tweaked by Philip Withnall before pushing.)
https://bugzilla.gnome.org/show_bug.cgi?id=791015
The tool was ported to Python, but we should not mention the programming
language used, in case we port it to some other language in the distant
future.
This is a variant of g_file_get_path() which returns a const string to
the caller, rather than transferring ownership.
I've been carrying `gs_file_get_path_cached()` in libgsystem and it
has seen a lot of use in the ostree and flatpak codebases. There are
probably others too.
I think language bindings like Python/Gjs could also use this to avoid
an extra malloc (i.e. we could transparently replace
`g_file_get_path()` with `g_file_peek_path()`.
(Originally by Colin Walters. Tweaked by Philip Withnall to update to
2.56, change the function name and drop the locking.)
https://bugzilla.gnome.org/show_bug.cgi?id=767976
gdbus-codegen's options only allow a simultaneous header and source
code generation.
A `--header` and `--body` options have been added along with the
`--output` option which allow separate C header and code
generation.
These options cannot be used in addition to the old options such
as `--generate-c-code`, `--generate-docbook` or
`--output-directory`.
These options have also been added to gdbus-codegen's documentation.
https://bugzilla.gnome.org/show_bug.cgi?id=791015
The #pragma once is widely supported preprocessor directive that can
be used instead of include guards.
This adds support for using optionally this directive instead of
include guards.
https://bugzilla.gnome.org/show_bug.cgi?id=791015
The optparse module is deprecated since version 2.7 and the
development continues with the argparse.
The code has been moved from optparse to argparse when parsing
command-line options. This has also led to the deprecation of the
`--xml-files`, and positional arguments should be used instead.
https://bugzilla.gnome.org/show_bug.cgi?id=791015
Custom desktop file fields may be translated, but there is currently
no non-hacky way to look up the localized value; fill get gap with
a small wrapper around g_key_file_get_locale_string().
https://bugzilla.gnome.org/show_bug.cgi?id=779413
Hopefully discouraging people from overriding that and building with it
enabled.
Pro-tip: GLib will break.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=791622
In order to enrich information displayed by GApplication command line
handling when --help is invoked, 3 new methods are proposed:
. g_application_set_option_context_parameter_string
. g_application_set_option_context_summary
. g_application_set_option_context_description
Those methods interact with the GApplication's internal GOptionContext
which is created for command line parsing in g_application_parse_command_line.
(please refer to the GOptionContext class for more information about option
context, parameter string, summary and description.)
To illustrate the 3 methods, an example is provided:
. gapplication-example-cmdline4.c
Weak-pointers are currently lacking g_set_object() & g_clear_object()
helpers equivalent. New functions (and macros, both are provided) are
convenient in many case, especially for the property's notify-on-set
pattern:
if (g_set_weak_pointer (...))
g_object_notify (...)
Inspired by Christian Hergert's original implementation for
gnome-builder.
https://bugzilla.gnome.org/show_bug.cgi?id=749527
Putting them in the same section causes gtk-doc to mix their properties
together in a single listing, which is confusing.
Since having them in a single section doesn’t really add anything, split
them out to one class per section.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=791334
The example code defines an interface with three methods. The preceding text
reads 'This interface defines two methods'. This appears to be because the
example code was changed without updating the surrounding text.
https://bugzilla.gnome.org/show_bug.cgi?id=790830
This adds g_file_load_bytes() to make it more convenient to
load the contents of a GFile as GBytes.
It includes a special casing for gresources to increase the
chances that the GBytes directly references the embedded data
instead of copying to the heap.
https://bugzilla.gnome.org/show_bug.cgi?id=790272
It's a very common pattern to see code that looks like this in
dispose() or finalize() implementations:
if (priv->source_id > 0)
{
g_source_remove (priv->source_id);
priv->source_id = 0;
}
This API allows to accomplish the same goal with a single line:
g_clear_handle_id (&priv->source_id, (GClearHandleFunc) g_source_remove);
Thanks to Emmanuele Bassi <ebassi@gnome.org> for making the patch
generic.
https://bugzilla.gnome.org/show_bug.cgi?id=788489
This is needed by gnome-control-center and gnome-settings-daemon; it
makes existing checks from gunixmounts.c public.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
https://bugzilla.gnome.org/show_bug.cgi?id=788927
It adds support for source-specific multicast IGMPv3.
Allow receiving data only from a specified source when joining
a multicast group.
g_socket_join_multicast_group_ssm can be called multiple times
to allow receiving data from more than one source.
Support IPv4 and IPv6.
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=740791
We should show how to properly use glib-mkenums with Autotools, in
the hope that fewer people will be caught cargo-culting rules written
in the late '90s.
https://bugzilla.gnome.org/show_bug.cgi?id=788948
We should show how to properly use glib-genmarshal with Autotools, in
the hope that fewer people will be caught cargo-culting rules written
in the late '90s.
https://bugzilla.gnome.org/show_bug.cgi?id=788948
This supports a subset of ISO 8601 since that is a commonly used standard for
storing date and time information. We support only ISO 8601 strings that contain
full date and time information as this would otherwise not map to GDateTime.
This subset includes all of RFC 3339 which is commonly used on the Internet and
the week and ordinal day formats as these are supported in the GDateTime APIs.
(Minor modification by Philip Withnall to change API versions from 2.54
to 2.56.)
https://bugzilla.gnome.org/show_bug.cgi?id=753459
In the Dictionary section of the gvariant-format-strings documentation
only how to construct a dictionary is shown.
Add a small example showing how to extract data from a nested dictionary
and specifically from a GVariant of type "(oa{sa{sv})". Move also the
Dictionary section after the GVariant * section for the sake of clarity.
https://bugzilla.gnome.org/show_bug.cgi?id=786737
By default, only build man pages and gtk-doc if the build-deps were
found. To force-enable, pass -Dwith-docs=yes and -Dwith-man=yes.
Also use a foreach loop for man pages instead of listing them all
manually
We're in the process or rewriting other tools in Python to reduce the
number of dependencies of GLib.
Additionally, making glib-genmarshal a Python script reduces the
complexity when cross-compiling, as we don't need a native build to
generate the marshallers.
https://bugzilla.gnome.org/show_bug.cgi?id=784528
Very often when we want to convert a string to number, we assume that
the string contains only a number. We have g_ascii_strto* family of
functions to do the conversion but they are awkward to use - one has
to check if errno is zero, end_ptr is not NULL and *end_ptr points to
the terminating nul and then do the bounds checking. Many projects
need this kind of functionality, so it gets reimplemented all the
time.
This commit adds some replacement functions that convert a string to a
signed or unsigned number that also follows the usual way of error
reporting - returning FALSE on failure and filling an error output
parameter.
Partially based on telepathy-glib’s tp_g_ptr_array_contains(), and a
patch by Xavier Claessens <xavier.claessens@collabora.co.uk>.
Test cases included.
https://bugzilla.gnome.org/show_bug.cgi?id=698064
It's unnecessary, and only adds visual noise; we have been fairly
inconsistent in the past, but the semi-colon-less version clearly
dominates in the code base.
https://bugzilla.gnome.org/show_bug.cgi?id=669355
This is effectively the mc-wait-for-name tool from
telepathy-mission-control; moving it in to gdbus-tool will make it more
widely useful without making people depend on telepathy-mission-control
for no other reason. The code here is reimplemented from scratch to use
GDBus.
It blocks until the specified well-known name is owned by some process
on the bus (which can be the session, system, or any other bus). By
passing --activate, the same (or a different) name can be auto-started
on the bus first.
A timeout can be specified to ensure the process doesn’t block forever.
https://bugzilla.gnome.org/show_bug.cgi?id=745971
