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tracing: allow CURL_DEBUG override

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On debug builds, allow environment variable CURL_DEBUG to override any
setting done via '-v' or '--no-verbose'.

Closes #14436
This commit is contained in:
Stefan Eissing 2024-08-07 12:54:58 +02:00 • committed by Daniel Stenberg
parent 0bc5b2e37c
commit 3ac1569c16
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2 changed files with 28 additions and 8 deletions
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9
docs/libcurl/libcurl-env-dbg.md
View file

@ -64,6 +64,15 @@ Trace logging behavior as an alternative to calling curl_global_trace(3).
Example: **CURL_DEBUG=http/2** means trace details about HTTP/2 handling.
In the curl command line tool, built with `--enable-debug`, this environment
variable adds to arguments like `--verbose`, `-vvv`. At least a single `-v`
is needed to make the run emit trace output, but when it does, the contents
of `CURL_DEBUG` are added and can override existing options.
Example: **CURL_DEBUG=tcp,-http/2 curl -vv url** means trace protocol details,
triggered by `-vv`, add tracing of TCP in addition and remove tracing of
HTTP/2.
## CURL_DEBUG_SIZE
Fake the size returned by CURLINFO_HEADER_SIZE and CURLINFO_REQUEST_SIZE.

27
lib/curl_trc.c
View file

@ -314,7 +314,7 @@ static void trc_apply_level_by_category(int category, int lvl)
}
}
CURLcode Curl_trc_opt(const char *config)
static CURLcode trc_opt(const char *config)
{
char *token, *tok_buf, *tmp;
int lvl;
@ -355,18 +355,29 @@ CURLcode Curl_trc_opt(const char *config)
return CURLE_OK;
}
CURLcode Curl_trc_opt(const char *config)
{
CURLcode result = config? trc_opt(config) : CURLE_OK;
#ifdef DEBUGBUILD
/* CURL_DEBUG can override anything */
if(!result) {
const char *dbg_config = getenv("CURL_DEBUG");
if(dbg_config)
result = trc_opt(dbg_config);
}
#endif /* DEBUGBUILD */
return result;
}
CURLcode Curl_trc_init(void)
{
#ifdef DEBUGBUILD
/* WIP: we use the auto-init from an env var only in DEBUG builds for
* convenience. */
const char *config = getenv("CURL_DEBUG");
if(config) {
return Curl_trc_opt(config);
}
#endif /* DEBUGBUILD */
return Curl_trc_opt(NULL);
#else
return CURLE_OK;
#endif
}
#else /* defined(CURL_DISABLE_VERBOSE_STRINGS) */
CURLcode Curl_trc_init(void)