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/*
* Copyright (c) 2011 Collabora Ltd.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* CONTRIBUTORS
* Stef Walter <stef@memberwebs.com>
*/
#include "config.h"
#include "debug.h"
#include <pthread.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
struct DebugKey {
const char *name;
int value;
};
static struct DebugKey debug_keys[] = {
{ "lib", DEBUG_LIB },
{ "conf", DEBUG_CONF },
{ "uri", DEBUG_URI },
{ 0, }
};
pthread_mutex_t debug_mutex = PTHREAD_MUTEX_INITIALIZER;
/* global variable exported in debug.h */
int debug_current_flags = ~0;
static int
parse_environ_flags (void)
{
const char *env;
int result = 0;
const char *p;
const char *q;
int i;
env = getenv ("P11_KIT_DEBUG");
if (!env)
return 0;
if (strcmp (env, "all") == 0) {
for (i = 0; debug_keys[i].name; i++)
result |= debug_keys[i].value;
} else if (strcmp (env, "help") == 0) {
fprintf (stderr, "Supported debug values:");
for (i = 0; debug_keys[i].name; i++)
fprintf (stderr, " %s", debug_keys[i].name);
fprintf (stderr, "\n");
} else {
p = env;
while (*p) {
q = strpbrk (p, ":;, \t");
if (!q)
q = p + strlen (p);
for (i = 0; debug_keys[i].name; i++) {
if (q - p == strlen (debug_keys[i].name) &&
strncmp (debug_keys[i].name, p, q - p) == 0)
result |= debug_keys[i].value;
}
p = q;
if (*p)
p++;
}
}
return result;
}
void
debug_message (int flag, const char *format, ...)
{
static int initialized_flags = 0;
char buffer[512];
va_list args;
pthread_mutex_lock (&debug_mutex);
/*
* This is not thread-safe, but it's not really the end of the
* world if it happens more than once.
*/
if (!initialized_flags) {
initialized_flags = 1;
debug_current_flags = parse_environ_flags ();
}
if (flag & debug_current_flags) {
va_start (args, format);
vsnprintf (buffer, sizeof (buffer), format, args);
buffer[sizeof (buffer) -1] = 0;
va_end (args);
fprintf (stderr, "(p11-kit:%d) %s\n", getpid(), buffer);
}
pthread_mutex_unlock (&debug_mutex);
}
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