From cd13e2506379761d3464eae917eb1881876a7aa1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 11:23:06 +0200 Subject: Adding upstream version 1.12.0. Signed-off-by: Daniel Baumann --- src/log.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 src/log.c (limited to 'src/log.c') diff --git a/src/log.c b/src/log.c new file mode 100644 index 0000000..e54f8fc --- /dev/null +++ b/src/log.c @@ -0,0 +1,122 @@ +/* + * Copyright (c) 2018-2021 Yubico AB. All rights reserved. + * Use of this source code is governed by a BSD-style + * license that can be found in the LICENSE file. + * SPDX-License-Identifier: BSD-2-Clause + */ + +#undef _GNU_SOURCE /* XSI strerror_r() */ + +#include +#include + +#include "fido.h" + +#ifndef FIDO_NO_DIAGNOSTIC + +#define XXDLEN 32 +#define XXDROW 128 +#define LINELEN 256 + +#ifndef TLS +#define TLS +#endif + +static TLS int logging; +static TLS fido_log_handler_t *log_handler; + +static void +log_on_stderr(const char *str) +{ + fprintf(stderr, "%s", str); +} + +static void +do_log(const char *suffix, const char *fmt, va_list args) +{ + char line[LINELEN], body[LINELEN]; + + vsnprintf(body, sizeof(body), fmt, args); + + if (suffix != NULL) + snprintf(line, sizeof(line), "%.180s: %.70s\n", body, suffix); + else + snprintf(line, sizeof(line), "%.180s\n", body); + + log_handler(line); +} + +void +fido_log_init(void) +{ + logging = 1; + log_handler = log_on_stderr; +} + +void +fido_log_debug(const char *fmt, ...) +{ + va_list args; + + if (!logging || log_handler == NULL) + return; + + va_start(args, fmt); + do_log(NULL, fmt, args); + va_end(args); +} + +void +fido_log_xxd(const void *buf, size_t count, const char *fmt, ...) +{ + const uint8_t *ptr = buf; + char row[XXDROW], xxd[XXDLEN]; + va_list args; + + if (!logging || log_handler == NULL) + return; + + snprintf(row, sizeof(row), "buf=%p, len=%zu", buf, count); + va_start(args, fmt); + do_log(row, fmt, args); + va_end(args); + *row = '\0'; + + for (size_t i = 0; i < count; i++) { + *xxd = '\0'; + if (i % 16 == 0) + snprintf(xxd, sizeof(xxd), "%04zu: %02x", i, *ptr++); + else + snprintf(xxd, sizeof(xxd), " %02x", *ptr++); + strlcat(row, xxd, sizeof(row)); + if (i % 16 == 15 || i == count - 1) { + fido_log_debug("%s", row); + *row = '\0'; + } + } +} + +void +fido_log_error(int errnum, const char *fmt, ...) +{ + char errstr[LINELEN]; + va_list args; + + if (!logging || log_handler == NULL) + return; + if (strerror_r(errnum, errstr, sizeof(errstr)) != 0) + snprintf(errstr, sizeof(errstr), "error %d", errnum); + + va_start(args, fmt); + do_log(errstr, fmt, args); + va_end(args); +} + +void +fido_set_log_handler(fido_log_handler_t *handler) +{ + if (handler != NULL) + log_handler = handler; +} + +#endif /* !FIDO_NO_DIAGNOSTIC */ -- cgit v1.2.3