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8a2ec00d DDO |
1 | /* |
2 | * Copyright 2020-2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <openssl/trace.h> | |
11 | #include "apps.h" | |
12 | #include "log.h" | |
13 | ||
14 | static int verbosity = LOG_INFO; | |
15 | ||
16 | int log_set_verbosity(const char *prog, int level) | |
17 | { | |
18 | if (level < LOG_EMERG || level > LOG_TRACE) { | |
19 | trace_log_message(-1, prog, LOG_ERR, | |
20 | "Invalid verbosity level %d", level); | |
21 | return 0; | |
22 | } | |
23 | verbosity = level; | |
24 | return 1; | |
25 | } | |
26 | ||
27 | int log_get_verbosity(void) | |
28 | { | |
29 | return verbosity; | |
30 | } | |
31 | ||
32 | #ifdef HTTP_DAEMON | |
33 | static int print_syslog(const char *str, size_t len, void *levPtr) | |
34 | { | |
35 | int level = *(int *)levPtr; | |
36 | int ilen = len > MAXERRLEN ? MAXERRLEN : len; | |
37 | ||
38 | syslog(level, "%.*s", ilen, str); | |
39 | ||
40 | return ilen; | |
41 | } | |
42 | #endif | |
43 | ||
44 | static void log_with_prefix(const char *prog, const char *fmt, va_list ap) | |
45 | { | |
46 | char prefix[80]; | |
47 | BIO *bio, *pre = BIO_new(BIO_f_prefix()); | |
48 | ||
4a6e5a11 | 49 | (void)BIO_snprintf(prefix, sizeof(prefix), "%s: ", prog); |
8a2ec00d DDO |
50 | (void)BIO_set_prefix(pre, prefix); |
51 | bio = BIO_push(pre, bio_err); | |
52 | (void)BIO_vprintf(bio, fmt, ap); | |
53 | (void)BIO_printf(bio, "\n"); | |
54 | (void)BIO_flush(bio); | |
55 | (void)BIO_pop(pre); | |
56 | BIO_free(pre); | |
57 | } | |
58 | ||
b1104a3a RL |
59 | /* |
60 | * Unfortunately, C before C99 does not define va_copy, so we must | |
61 | * check if it can be assumed to be present. We do that with an internal | |
62 | * antifeature macro. | |
63 | * C versions since C94 define __STDC_VERSION__, so it's enough to | |
64 | * check its existence and value. | |
65 | */ | |
66 | #undef OSSL_NO_C99 | |
67 | #if !defined(__STDC_VERSION__) || __STDC_VERSION__ + 0 < 199900L | |
68 | # define OSSL_NO_C99 | |
69 | #endif | |
70 | ||
8a2ec00d DDO |
71 | void trace_log_message(int category, |
72 | const char *prog, int level, const char *fmt, ...) | |
73 | { | |
74 | va_list ap; | |
75 | va_start(ap, fmt); | |
b1104a3a RL |
76 | |
77 | #ifdef OSSL_NO_C99 | |
8a2ec00d DDO |
78 | if (verbosity >= level) |
79 | category = -1; /* disabling trace output in addition to logging */ | |
80 | #endif | |
81 | if (category >= 0 && OSSL_trace_enabled(category)) { | |
82 | BIO *out = OSSL_trace_begin(category); | |
b1104a3a | 83 | #ifndef OSSL_NO_C99 |
8a2ec00d DDO |
84 | va_list ap_copy; |
85 | ||
86 | va_copy(ap_copy, ap); | |
87 | (void)BIO_vprintf(out, fmt, ap_copy); | |
88 | va_end(ap_copy); | |
89 | #else | |
90 | (void)BIO_vprintf(out, fmt, ap); | |
91 | #endif | |
92 | (void)BIO_printf(out, "\n"); | |
93 | OSSL_trace_end(category, out); | |
94 | } | |
95 | if (verbosity < level) { | |
96 | va_end(ap); | |
97 | return; | |
98 | } | |
99 | #ifdef HTTP_DAEMON | |
100 | if (n_responders != 0) { | |
101 | vsyslog(level, fmt, ap); | |
102 | if (level <= LOG_ERR) | |
103 | ERR_print_errors_cb(print_syslog, &level); | |
104 | } else | |
105 | #endif | |
106 | log_with_prefix(prog, fmt, ap); | |
107 | va_end(ap); | |
108 | } |