This is an internal helper executable, which users shouldn't invoke
directly (see glib#1633).
When building for a single-architecture distribution, we can install
it as ${libexecdir}/gio-launch-desktop.
When building for a multiarch distribution, installing it into an
architecture-specific location and packaging it alongside the GLib
library avoids the problem discussed in glib#1633 where it would either
cause a circular dependency between the GLib library and a common
cross-architecture package (libglib2.0-bin in Debian), or require a
separate package just to contain gio-launch-desktop, or cause different
architectures' copies to overwrite each other.
Signed-off-by: Simon McVittie <smcv@collabora.com>
gio-launch-desktop was removed before checking GIO for potentially
unsafe environment variable references, so reverting its removal brought
this one back. If a setuid program is using GAppInfo then something is
probably already horribly wrong, but let's be careful anyway.
Signed-off-by: Simon McVittie <smcv@collabora.com>
A shell one-liner was enough to set GIO_LAUNCHED_DESKTOP_FILE_PID,
but ideally we also want to do the equivalent of sd_journal_stream_fd()
to set up its standard output and standard error streams.
Ideally we would call sd_journal_stream_fd() in a process that will
exec the real program, otherwise it will report the wrong process ID
in the Journal, but we can't easily do that in a forked child when
using posix_spawn() for subprocesses.
This reverts commit 2b533ca99a.
Signed-off-by: Simon McVittie <smcv@collabora.com>
In some cases (such as in our CI tests) we may not have any dbus session
set after launching, but we always assumed so.
In case we have not a session bus set, we only have to return early.
Add SPDX license (but not copyright) headers to all files which follow a
certain pattern in their existing non-machine-readable header comment.
This commit was entirely generated using the command:
```
git ls-files gio/*.[ch] | xargs perl -0777 -pi -e 's/\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/\n \*\n \* SPDX-License-Identifier: LGPL-2.1-or-later\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/igs'
```
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Helps: #1415
There shouldn’t be any issues here with empty argv arrays since an empty
`Exec=` line is already checked for. Encode that explicitly with an
assertion.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Specs say that on Unix id should be desktop file id from the xdg menu
specification, however, currently code just uses basename of .desktop file.
Fix that by finding the .desktop file in all the desktop_file_dirs and use
basename only as a fallback.
See https://specifications.freedesktop.org/menu-spec/latest/go01.html#term-desktop-file-id
and https://specifications.freedesktop.org/desktop-entry-spec/latest/ar01s02.html#desktop-file-id
"To determine the ID of a desktop file, make its full path relative to the
$XDG_DATA_DIRS component in which the desktop file is installed, remove the
"applications/" prefix, and turn '/' into '-'."
Also, add unit test that verifies Desktop Id is being correctly set
Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Emit this when we're about to spawn or DBus activate a GAppInfo. This
allows lauchers to keep the appinfo associated with a startup id.
We use a GVariant to allow for future exansion of the supplied data.
When using g_desktop_app_info_launch_uris_as_manager the "launched"
signal allows to map a desktop-startup-id to a GAppInfo. Make this
possible for DBus activation too.
Since we don't have a PID there we pass a 0. Update the signal
description accordingly.
Instead of calling xterm when it clearly does not exist and causes a silent error,
inform the user that the launch failed so they can take the right action.
On Unix platforms, wait() and friends yield an integer that encodes
how the process exited. Confusingly, this is usually not the same as
the integer passed to exit() or returned from main(): conceptually it's
an integer encoding of this tagged union:
enum { EXITED, SIGNALLED, ... } tag;
union {
int exit_status; /* if EXITED */
struct {
int terminating_signal;
bool core_dumped;
} terminating_signal; /* if SIGNALLED */
...
} detail;
Meanwhile, on Windows, wait statuses and exit statuses are
interchangeable.
I find that it's clearer what is going on if we are consistent about
referring to the result of wait() as a "wait status", and the value
passed to exit() as an "exit status".
GSubprocess already gets this right: g_subprocess_get_status() returns
the wait status, while g_subprocess_get_exit_status() genuinely returns
the exit status. However, the GSpawn family of APIs has tended to
conflate the two.
Confusingly, g_spawn_check_exit_status() has always checked a wait
status, and it would not be correct to pass an exit status to it; so
let's deprecate it in favour of g_spawn_check_wait_status(), which
does the same thing that g_spawn_check_exit_status() always did.
Code that needs backwards-compatibility with older GLib can use:
#if !GLIB_CHECK_VERSION(2, 69, 0)
#define g_spawn_check_wait_status(x) (g_spawn_check_exit_status (x))
#endif
Signed-off-by: Simon McVittie <smcv@collabora.com>
gio/gdesktopappinfo.c: In function ‘g_app_info_get_all’:
gio/gdesktopappinfo.c:4597:17: error: comparison of integer expressions of different signedness: ‘int’ and ‘guint’ {aka ‘unsigned int’}
4597 | for (i = 0; i < desktop_file_dirs->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘g_desktop_app_info_search’:
gio/gdesktopappinfo.c:4517:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
4517 | for (i = 0; i < desktop_file_dirs->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘g_desktop_app_info_get_implementations’:
gio/gdesktopappinfo.c:4451:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
4451 | for (i = 0; i < desktop_file_dirs->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘g_desktop_app_info_get_desktop_ids_for_content_type’:
gio/gdesktopappinfo.c:4154:19: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
4154 | for (j = 0; j < desktop_file_dirs->len; j++)
| ^
gio/gdesktopappinfo.c:4158:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’} [-Werror=sign-compare]
4158 | for (i = 0; i < hits->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘get_list_of_mimetypes’:
gio/gdesktopappinfo.c:4116:21: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
4116 | for (i = 0; i < array->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘g_desktop_app_info_launch_uris_with_spawn’:
gio/gdesktopappinfo.c:2804:21: error: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’
2804 | for (i = 0; i < G_N_ELEMENTS (wrapper_argv); i++)
| ^
gio/gdesktopappinfo.c: In function ‘desktop_file_dirs_lock’:
gio/gdesktopappinfo.c:1564:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
1564 | for (i = 0; i < desktop_file_dirs->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘array_contains’:
gio/gdesktopappinfo.c:1193:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘guint’ {aka ‘unsigned int’}
1193 | for (i = 0; i < array->len; i++)
| ^
gio/gdesktopappinfo.c: In function ‘desktop_file_dir_unindexed_setup_search’:
gio/gdesktopappinfo.c:1114:25: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘long unsigned int’
1114 | for (i = 0; i < G_N_ELEMENTS (desktop_key_match_category); i++)
| ^
Split out XDG_CURRENT_DESKTOP handling to a separate function and make
sure that it drops all the invalid entries properly. Earlier a bad
entry could slip through the checks by sitting just after another bad
entry, like in env being set to `invalid1!:invalid2!`, where
`invalid2!` could slip the checks.
Its components are used to build filenames, so if the value of
`XDG_CURRENT_DESKTOP` comes from an untrusted caller (as can happen in
setuid programs), using it unvalidated may be unsafe.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
Helps: #2168
It may be defined by the environment (we document that as being allowed)
— if so, individual files should not try to redefine it, as that causes
a preprocessor warning.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Where applicable. Where the current use of `g_file_set_contents()` seems
the most appropriate, leave that in place.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Helps: #1302
When an app is spawned using g_desktop_app_info_launch_uris_with_spawn
it will expand the various token in the app's commandline with the
URIs of the files to open. The expand_macro() function that is used for
this advances the pointer to the URI list to show up to which entries
it used.
To not loose the pointer to the list head a duplicate of the URI list
was actually passed to expand_macro(). However, it's not necessary to
create a copy of the URI list for that as expand_macro() will only
change which element the pointer will point to.
This behaviour actually caused the duplicated list to be leaked as the
the list pointer is NULL once all URIs are used up by expand_macro()
and thus nothing was freed at the end of the function.
This was mostly machine generated with the following command:
```
codespell \
--builtin clear,rare,usage \
--skip './po/*' --skip './.git/*' --skip './NEWS*' \
--write-changes .
```
using the latest git version of `codespell` as per [these
instructions](https://github.com/codespell-project/codespell#user-content-updating).
Then I manually checked each change using `git add -p`, made a few
manual fixups and dropped a load of incorrect changes.
There are still some outdated or loaded terms used in GLib, mostly to do
with git branch terminology. They will need to be changed later as part
of a wider migration of git terminology.
If I’ve missed anything, please file an issue!
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Mention in the documentation that (presumably for performance reasons)
the search results from `g_desktop_app_info_search()` are not filtered
by executable presence or hidden attribute.
Perhaps they should be in future, but for now we should at least
document it.
Spotted by Will Thompson.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
There were some problems about where to install `gio-launch-desktop` to
support multiarch systems without circular dependencies. Simon McVittie
suggested that, actually, given the current set of platforms supported
by `GDesktopAppInfo` (they’re all POSIX), we could just use `sh`.
That simplifies things nicely. `gio-launch-desktop` can always be
resurrected (and the multiarch debate continued and resolved) if needed
in future.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Fixes: #1633
It’s not enough to unref the monitor, since the GLib worker thread might
still hold a reference to it.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Helps: #1903
`DesktopFileDir` pointers are passed around between threads: they are
initially created on the main thread, but a pointer to them is passed to
the GLib worker thread in the file monitor callback
(`desktop_file_dir_changed()`).
Accordingly, the `DesktopFileDir` objects either have to be
(1) immutable;
(2) reference counted; or
(3) synchronised between the two threads
to avoid one of them being used by one thread after being freed on
another. Option (1) changed with commit 99bc33b6 and is no longer an
option. Option (3) would mean blocking the main thread on the worker
thread, which would be hard to achieve and is against the point of
having a worker thread. So that leaves option (2), which is implemented
here.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Fixes: #1903
For several years now (I haven’t looked up the exact date),
`gnome-terminal` has preferred being called as `gnome-terminal
--terminal-args -- /some/other/program --its-args` rather than as
`gnome-terminal --terminal-args -x /some/other/program --its-args`.
Since 2017 it has warned about uses of `-x` (see
ad4edbd118).
So we should change our calling convention for it.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
These have all been documented as deprecated for a long time, but we’ve
never had a way to programmatically mark them as deprecated. Do that
now.
This is based on the list of deprecations from the reverted commit
80fcb1bc2.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Fixes: #638
Add support for mate-terminal and xfce4-terminal with higher precedence
over xterm as it's likely people that have those want to use them.
They both use the gnome-terminal `-x` switch instead of xterm's `-e`.
The g_app_info_launch_uris_async() and g_app_info_launch_uris_finish()
functions are crucial to fix g_app_info_launch_default_for_uri_async()
to be really asynchronous.
This patch also adds GDesktopAppInfo implementation of that vfuncs.
The implementation may still use some synchronous calls to local MIME DB.
https://gitlab.gnome.org/GNOME/glib/issues/1347https://gitlab.gnome.org/GNOME/glib/issues/1249
This causes the desktop directory cache to be correctly reloaded between
unit tests if G_TEST_OPTION_ISOLATE_DIRS is in use.
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.
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.
