Add a secret --user-agent option to pass the application name

[vlc] / bin / vlc.c

diff --git a/bin/vlc.c b/bin/vlc.c
index f944aaeecf89810368bd5c356015a0e72e6ace1c..447b808d5438cf2e85f88cddc8a557dbac57ed82 100644 (file)
--- a/bin/vlc.c
+++ b/bin/vlc.c
@@ -42,21 +42,52 @@
 /* Explicit HACK */
 extern void LocaleFree (const char *);
 extern char *FromLocale (const char *);
+extern void vlc_enable_override (void);
 
 #include <signal.h>
 #include <time.h>
 #include <pthread.h>
 #include <unistd.h>
+#include <dlfcn.h>
+
+#ifdef HAVE_MAEMO
+static void dummy_handler (int signum)
+{
+    (void) signum;
+}
+#endif
 
 /*****************************************************************************
  * main: parse command line, start interface and spawn threads.
  *****************************************************************************/
 int main( int i_argc, const char *ppsz_argv[] )
 {
-#ifdef __APPLE__
-    /* The so-called POSIX-compliant MacOS X is not. 
-     * SIGPIPE fires even when it is blocked in all threads! */
+    /* The so-called POSIX-compliant MacOS X reportedly processes SIGPIPE even
+     * if it is blocked in all thread. Also some libraries want SIGPIPE blocked
+     * as they have no clue about signal masks.
+     * Note: this is NOT an excuse for not protecting against SIGPIPE. If
+     * LibVLC runs outside of VLC, we cannot rely on this code snippet. */
     signal (SIGPIPE, SIG_IGN);
+    /* Restore default for SIGCHLD in case parent ignores it. */
+    signal (SIGCHLD, SIG_DFL);
+
+#ifdef HAVE_SETENV
+# ifndef NDEBUG
+    /* Activate malloc checking routines to detect heap corruptions. */
+    setenv ("MALLOC_CHECK_", "2", 1);
+
+    /* Disable the ugly Gnome crash dialog so that we properly segfault */
+    setenv ("GNOME_DISABLE_CRASH_DIALOG", "1", 1);
+# endif
+
+    /* Make Xlib hide visuals with an alphachannel. Ensure that Qt4 will not
+     * use the alpha channel for the embedded video window. */
+    setenv ("XLIB_SKIP_ARGB_VISUALS", "1", 1);
+
+    /* Clear the X.Org startup notification ID. Otherwise the UI might try to
+     * change the environment while the process is multi-threaded. That could
+     * crash. Screw you X.Org. Next time write a thread-safe specification. */
+    unsetenv ("DESKTOP_STARTUP_ID");
 #endif
 
 #ifndef ALLOW_RUN_AS_ROOT
@@ -74,23 +105,14 @@ int main( int i_argc, const char *ppsz_argv[] )
 
 #ifndef __APPLE__
     /* This clutters OSX GUI error logs */
-    fprintf( stderr, "VLC media player %s\n", libvlc_get_version() );
-#endif
-
-#ifdef HAVE_PUTENV
-#   ifndef NDEBUG
-    /* Activate malloc checking routines to detect heap corruptions. */
-    putenv( (char*)"MALLOC_CHECK_=2" );
-
-    /* Disable the ugly Gnome crash dialog so that we properly segfault */
-    putenv( (char *)"GNOME_DISABLE_CRASH_DIALOG=1" );
-#   endif
+    fprintf( stderr, "VLC media player %s (revision %s)\n",
+             libvlc_get_version(), libvlc_get_changeset() );
 #endif
 
     /* Synchronously intercepted POSIX signals.
      *
      * In a threaded program such as VLC, the only sane way to handle signals
-     * is to block them in all thread but one - this is the only way to
+     * is to block them in all threads but one - this is the only way to
      * predict which thread will receive them. If any piece of code depends
      * on delivery of one of this signal it is intrinsically not thread-safe
      * and MUST NOT be used in VLC, whether we like it or not.
@@ -118,6 +140,13 @@ int main( int i_argc, const char *ppsz_argv[] )
     sigemptyset (&set);
     for (unsigned i = 0; i < sizeof (sigs) / sizeof (sigs[0]); i++)
         sigaddset (&set, sigs[i]);
+#ifdef HAVE_MAEMO
+    sigaddset (&set, SIGRTMIN);
+    {
+        struct sigaction act = { .sa_handler = dummy_handler, };
+        sigaction (SIGRTMIN, &act, NULL);
+    }
+#endif
 
     /* Block all these signals */
     pthread_sigmask (SIG_BLOCK, &set, NULL);
@@ -125,10 +154,11 @@ int main( int i_argc, const char *ppsz_argv[] )
     sigdelset (&set, SIGCHLD);
 
     /* Note that FromLocale() can be used before libvlc is initialized */
-    const char *argv[i_argc + 3];
+    const char *argv[i_argc + 4];
     int argc = 0;
 
     argv[argc++] = "--no-ignore-config";
+    argv[argc++] = "--user-agent=\"VLC media player\"";
 #ifdef TOP_BUILDDIR
     argv[argc++] = FromLocale ("--plugin-path="TOP_BUILDDIR"/modules");
 #endif
@@ -150,6 +180,8 @@ int main( int i_argc, const char *ppsz_argv[] )
             return 1; // BOOM!
     argv[argc] = NULL;
 
+    vlc_enable_override ();
+
     /* Initialize libvlc */
     libvlc_instance_t *vlc = libvlc_new (argc, argv);
 
@@ -171,5 +203,15 @@ int main( int i_argc, const char *ppsz_argv[] )
     for (int i = 1; i < argc; i++)
         LocaleFree (argv[i]);
 
+#ifdef RTLD_NOLOAD
+    /* Avoid crash in KIO scheduler cleanup. */
+    /* This is ugly, but we get way too many crash reports due to this. */
+    if (dlopen ("libkio.so.5", RTLD_LAZY|RTLD_LOCAL|RTLD_NOLOAD) != NULL)
+    {
+        fprintf (stderr, "KIO present. Unclean shutdown!\n"
+           " (see http://bugs.kde.org/show_bug.cgi?id=234484 for details)\n");
+        _exit (0);
+    }
+#endif
     return 0;
 }