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logging: Add option to have tag which is prepended to all messages

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Tag can be changed at runtime. Feature is enabled by setting
maximum tag length to positive value. Additionally, default
tag can be configured in Kconfig.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruscinski 2021-12-22 15:01:15 +01:00 • committed by Maureen Helm
commit 194c0acdfd
5 changed files with 75 additions and 1 deletions
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5
subsys/logging/log_output.c
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@ -495,6 +495,7 @@ static uint32_t prefix_print(const struct log_output *output,
bool stamp = flags & LOG_OUTPUT_FLAG_TIMESTAMP;
bool colors_on = flags & LOG_OUTPUT_FLAG_COLORS;
bool level_on = flags & LOG_OUTPUT_FLAG_LEVEL;
const char *tag = z_log_get_tag();
if (IS_ENABLED(CONFIG_LOG_BACKEND_NET) &&
flags & LOG_OUTPUT_FLAG_FORMAT_SYSLOG) {
@ -512,6 +513,10 @@ static uint32_t prefix_print(const struct log_output *output,
level_to_rfc5424_severity(level));
}
if (tag) {
length += print_formatted(output, "%s ", tag);
}
if (stamp) {
length += timestamp_print(output, flags, timestamp);
}