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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 "compat.h"
#include "debug.h"
#include <assert.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define P11_DEBUG_MESSAGE_MAX 512
struct DebugKey {
const char *name;
int value;
};
static struct DebugKey debug_keys[] = {
{ "lib", P11_DEBUG_LIB },
{ "conf", P11_DEBUG_CONF },
{ "uri", P11_DEBUG_URI },
{ "proxy", P11_DEBUG_PROXY },
{ "trust", P11_DEBUG_TRUST },
{ "tool", P11_DEBUG_TOOL },
{ "rpc", P11_DEBUG_RPC },
{ 0, }
};
static bool debug_inited = false;
static bool debug_strict = false;
/* global variable exported in debug.h */
int p11_debug_current_flags = ~0;
#ifdef HAVE_STRERROR_L
extern locale_t p11_message_locale;
#endif
static int
parse_environ_flags (void)
{
const char *env;
int result = 0;
const char *p;
const char *q;
int i;
env = secure_getenv ("P11_KIT_STRICT");
if (env && env[0] != '\0')
debug_strict = true;
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
p11_debug_init (void)
{
p11_debug_current_flags = parse_environ_flags ();
debug_inited = true;
}
void
p11_debug_message (int flag,
const char *format, ...)
{
va_list args;
if (flag & p11_debug_current_flags) {
fprintf (stderr, "(p11-kit:%d) ", getpid());
va_start (args, format);
vfprintf (stderr, format, args);
va_end (args);
fprintf (stderr, "\n");
}
}
void
p11_debug_message_err (int flag,
int errnum,
const char *format, ...)
{
va_list args;
char strerr[P11_DEBUG_MESSAGE_MAX];
if (flag & p11_debug_current_flags) {
fprintf (stderr, "(p11-kit:%d) ", getpid());
va_start (args, format);
vfprintf (stderr, format, args);
va_end (args);
snprintf (strerr, sizeof (strerr), "Unknown error %d", errnum);
#ifdef HAVE_STRERROR_L
if (p11_message_locale != (locale_t) 0)
strncpy (strerr, strerror_l (errnum, p11_message_locale), sizeof (strerr));
#else
strerror_r (errnum, strerr, sizeof (strerr));
#endif
strerr[P11_DEBUG_MESSAGE_MAX - 1] = 0;
fprintf (stderr, ": %s\n", strerr);
}
}
void
p11_debug_precond (const char *format,
...)
{
va_list va;
va_start (va, format);
vfprintf (stderr, format, va);
va_end (va);
#ifdef __COVERITY__
fprintf (stderr, "ignoring P11_KIT_STRICT under coverity: %d", (int)debug_strict);
#else
if (debug_strict)
#endif
abort ();
}
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