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742efe6232
In order to use the new posix_spawn gspawn codepath, for more robust app launching when available memory is low, we need to meet some conditions. child_setup needs to be NULL for this optimization to work, so drop the internal child_setup that is used here. Replace it with a lightweight wrapper binary (gio-launch-desktop) that sets GIO_LAUNCHED_DESKTOP_FILE_PID before executing the app. Adjust PATH for gio tests so that it can execute the new binary from the build directory.
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2018 Endless Mobile, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Daniel Drake <drake@endlessm.com>
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*/
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/*
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* gio-launch-desktop: GDesktopAppInfo helper
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* Executable wrapper to set GIO_LAUNCHED_DESKTOP_FILE_PID
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* There are complications when doing this in a fork()/exec() codepath,
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* and it cannot otherwise be done with posix_spawn().
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* This wrapper is designed to be minimal and lightweight.
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* It does not even link against glib.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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int
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main (int argc, char *argv[])
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{
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pid_t pid = getpid ();
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char buf[50];
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int r;
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if (argc < 2)
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return -1;
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r = snprintf (buf, sizeof (buf), "GIO_LAUNCHED_DESKTOP_FILE_PID=%ld", (long) pid);
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if (r >= sizeof (buf))
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return -1;
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putenv (buf);
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return execvp (argv[1], argv + 1);
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}
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