47f7ca6c31
We had not declared function attributes that check the format syntax; this led to a number of issues that remained undetected. Fixed.
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/*
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luksrku - Tool to remotely unlock LUKS disks using TLS.
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Copyright (C) 2016-2016 Johannes Bauer
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This file is part of luksrku.
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luksrku is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; this program is ONLY licensed under
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version 3 of the License, later versions are explicitly excluded.
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luksrku is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with luksrku; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Johannes Bauer <JohannesBauer@gmx.de>
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <openssl/err.h>
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#include "log.h"
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#include "util.h"
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static enum loglvl_t current_loglvl = LOGLEVEL_DEFAULT;
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static const char *loglvl_names[] = {
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[LLVL_FATAL] = "FATAL",
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[LLVL_ERROR] = "ERROR",
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[LLVL_WARNING] = "WARNING",
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[LLVL_INFO] = "INFO",
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[LLVL_DEBUG] = "DEBUG",
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[LLVL_TRACE] = "TRACE",
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};
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void log_setlvl(enum loglvl_t level) {
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current_loglvl = level;
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}
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static void log_prefix(enum loglvl_t level) {
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fprintf(stderr, "[%c]: ", loglvl_names[level][0]);
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}
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static void log_suffix(void) {
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fprintf(stderr, "\n");
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}
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bool should_log(enum loglvl_t level) {
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return level <= current_loglvl;
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}
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void __attribute__ ((format (printf, 2, 3))) log_msg(enum loglvl_t level, const char *msg, ...) {
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if (!should_log(level)) {
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/* Suppress message */
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return;
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}
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log_prefix(level);
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va_list vargs;
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va_start(vargs, msg);
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vfprintf(stderr, msg, vargs);
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va_end(vargs);
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log_suffix();
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}
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void log_libc(enum loglvl_t level, const char *msg, ...) {
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if (!should_log(level)) {
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/* Suppress message */
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return;
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}
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int saved_errno = errno;
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log_prefix(level);
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va_list vargs;
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va_start(vargs, msg);
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vfprintf(stderr, msg, vargs);
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va_end(vargs);
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fprintf(stderr, ": %s (%d)", strerror(saved_errno), saved_errno);
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log_suffix();
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}
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static int log_openssl_error_callback(const char *msg, size_t len, void *vlvlptr) {
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char msgcopy[strlen(msg) + 1];
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strcpy(msgcopy, msg);
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truncate_crlf(msgcopy);
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enum loglvl_t* levelptr = (enum loglvl_t*)vlvlptr;
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log_msg(*levelptr, "%s", msgcopy);
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return 0;
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}
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void log_openssl(enum loglvl_t level, const char *msg, ...) {
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if (!should_log(level)) {
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/* Suppress message */
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return;
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}
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log_prefix(level);
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fprintf(stderr, "OpenSSL error: ");
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va_list vargs;
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va_start(vargs, msg);
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vfprintf(stderr, msg, vargs);
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va_end(vargs);
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log_suffix();
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ERR_print_errors_cb(log_openssl_error_callback, &level);
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#if 0
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log_msg(level, "");
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log_msg(level, "OpenSSL error message:");
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ERR_print_errors_fp(stderr);
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log_msg(level, "----------------------");
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#endif
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}
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