err_prn.c
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/*
* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/err.h>
void ERR_print_errors_cb(int (*cb) (const char *str, size_t len, void *u),
void *u)
{
unsigned long l;
char buf[256];
char buf2[4096];
const char *file, *data;
int line, flags;
/*
* We don't know what kind of thing CRYPTO_THREAD_ID is. Here is our best
* attempt to convert it into something we can print.
*/
union {
CRYPTO_THREAD_ID tid;
unsigned long ltid;
} tid;
tid.ltid = 0;
tid.tid = CRYPTO_THREAD_get_current_id();
while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) != 0) {
ERR_error_string_n(l, buf, sizeof(buf));
BIO_snprintf(buf2, sizeof(buf2), "%lu:%s:%s:%d:%s\n", tid.ltid, buf,
file, line, (flags & ERR_TXT_STRING) ? data : "");
if (cb(buf2, strlen(buf2), u) <= 0)
break; /* abort outputting the error report */
}
}
static int print_bio(const char *str, size_t len, void *bp)
{
return BIO_write((BIO *)bp, str, len);
}
void ERR_print_errors(BIO *bp)
{
ERR_print_errors_cb(print_bio, bp);
}
#ifndef OPENSSL_NO_STDIO
void ERR_print_errors_fp(FILE *fp)
{
BIO *bio = BIO_new_fp(fp, BIO_NOCLOSE);
if (bio == NULL)
return;
ERR_print_errors_cb(print_bio, bio);
BIO_free(bio);
}
#endif