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info: write debugging output to file if GST_DEBUG_FILE environment variable is set

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This changes behaviour slightly in that we no longer output things
via g_printerr(), so any non-standard glib printerr handlers are no
longer called when GST_DEBUG is enabled. However, this seems not
really desirable in most cases anyway, and the GLib docs also say
that libraries should not use g_printerr() for logging.

Other stderr output (e.g. warnings, or application messages) will
of course not be captured in the log file this way.

GST_DEBUG_FILE=- will redirect debug output to stdout.
This commit is contained in:
Tim-Philipp Müller 2010-06-04 11:24:59 +01:00
parent 21c8edca2a
commit 9d4caf8d8c
1 changed files with 32 additions and 10 deletions
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42
gst/gstinfo.c
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@ -99,6 +99,8 @@
# include <printf.h>
#endif
#include <stdio.h> /* fprintf */
#include <glib/gstdio.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* getpid on UNIX */
#endif
@ -264,6 +266,8 @@ static gboolean pretty_tags = PRETTY_TAGS_DEFAULT;
static gint __default_level;
static gint __use_color;
static FILE *log_file;
/* FIXME: export this? */
gboolean
_priv_gst_in_valgrind (void)
@ -308,6 +312,22 @@ _gst_debug_init (void)
{
const gchar *env;
env = g_getenv ("GST_DEBUG_FILE");
if (env != NULL && *env != '\0') {
if (strcmp (env, "-") == 0) {
log_file = stdout;
} else {
log_file = g_fopen (env, "w");
if (log_file == NULL) {
g_printerr ("Could not open log file '%s' for writing: %s\n", env,
g_strerror (errno));
log_file = stderr;
}
}
} else {
log_file = stderr;
}
g_atomic_int_set (&__default_level, GST_LEVEL_DEFAULT);
g_atomic_int_set (&__use_color, 1);
@ -871,7 +891,9 @@ static const gchar *levelcolormap[GST_LEVEL_COUNT] = {
*
* The default logging handler used by GStreamer. Logging functions get called
* whenever a macro like GST_DEBUG or similar is used. This function outputs the
* message and additional info using the glib error handler.
* message and additional info to stderr (or the log file specified via the
* GST_DEBUG_FILE environment variable).
*
* You can add other handlers by using gst_debug_add_log_function().
* And you can remove this handler by calling
* gst_debug_remove_log_function(gst_debug_log_default);
@ -916,7 +938,7 @@ gst_debug_log_default (GstDebugCategory * category, GstDebugLevel level,
levelcolor = levelcolormap[level];
#define PRINT_FMT " %s"PID_FMT"%s "PTR_FMT" %s%s%s %s"CAT_FMT"%s %s\n"
g_printerr ("%" GST_TIME_FORMAT PRINT_FMT, GST_TIME_ARGS (elapsed),
g_fprintf (log_file, "%" GST_TIME_FORMAT PRINT_FMT, GST_TIME_ARGS (elapsed),
pidcolor, pid, clear, g_thread_self (), levelcolor,
gst_debug_level_get_name (level), clear, color,
gst_debug_category_get_name (category), file, line, function, obj,
@ -933,31 +955,31 @@ gst_debug_log_default (GstDebugCategory * category, GstDebugLevel level,
SetConsoleTextAttribute (GetStdHandle (STD_ERROR_HANDLE), (c));
g_static_mutex_lock (&win_print_mutex);
/* timestamp */
g_printerr ("%" GST_TIME_FORMAT " ", GST_TIME_ARGS (elapsed));
g_fprintf (log_file, "%" GST_TIME_FORMAT " ", GST_TIME_ARGS (elapsed));
/* pid */
SET_COLOR (available_colors[pid % G_N_ELEMENTS (available_colors)]);
g_printerr (PID_FMT, pid);
g_fprintf (log_file, PID_FMT, pid);
/* thread */
SET_COLOR (clear);
g_printerr (" " PTR_FMT " ", g_thread_self ());
g_fprintf (log_file, " " PTR_FMT " ", g_thread_self ());
/* level */
SET_COLOR (levelcolormap[level]);
g_printerr ("%s ", gst_debug_level_get_name (level));
g_fprintf (log_file, "%s ", gst_debug_level_get_name (level));
/* category */
SET_COLOR (gst_debug_construct_win_color (gst_debug_category_get_color
(category)));
g_printerr (CAT_FMT, gst_debug_category_get_name (category),
g_fprintf (log_file, CAT_FMT, gst_debug_category_get_name (category),
file, line, function, obj);
/* message */
SET_COLOR (clear);
g_printerr (" %s\n", gst_debug_message_get (message));
g_fprintf (log_file, " %s\n", gst_debug_message_get (message));
g_static_mutex_unlock (&win_print_mutex);
#endif
} else {
/* no color, all platforms */
#define PRINT_FMT " "PID_FMT" "PTR_FMT" %s "CAT_FMT" %s\n"
g_printerr ("%" GST_TIME_FORMAT PRINT_FMT, GST_TIME_ARGS (elapsed), pid,
g_thread_self (), gst_debug_level_get_name (level),
g_fprintf (log_file, "%" GST_TIME_FORMAT PRINT_FMT, GST_TIME_ARGS (elapsed),
pid, g_thread_self (), gst_debug_level_get_name (level),
gst_debug_category_get_name (category), file, line, function, obj,
gst_debug_message_get (message));
#undef PRINT_FMT