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/* tarfs - A GNU tar filesystem for the Hurd.
Copyright (C) 2002, Ludovic Courtès <ludo@chbouib.org>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or * (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA */
/*
* General debugging output tools.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <error.h>
#include <string.h>
#include <cthreads.h>
static struct mutex debug_lock;
static char *debug_function = NULL;
static FILE *debug_file = NULL;
/* Sets the debugging output file. */
void
debug_set_file (const char *name)
{
if (!strcmp (name, "-"))
debug_file = stderr;
else
{
debug_file = fopen (name, "w+");
if (!debug_file)
error (0, errno, name);
}
}
void
__debug_start (const char *function)
{
if (!debug_file)
return;
mutex_lock (&debug_lock);
debug_function = strdup (function);
}
void
__debug (const char *fmt, ...)
{
va_list ap;
if (!debug_file)
return;
fprintf (debug_file, "%s: ", debug_function);
va_start (ap, fmt);
vfprintf (debug_file, fmt, ap);
va_end (ap);
fprintf (debug_file, "\n");
}
void
__debug_end ()
{
if (!debug_file)
return;
free (debug_function);
debug_function = NULL;
fflush (debug_file);
mutex_unlock (&debug_lock);
}
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