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log: add new log output mode, that prints to console, but prefixes with syslog priority

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This is useful when we execute our own programs, reading output from its
STDERR, and want to retain priority information.
This commit is contained in:
Lennart Poettering 2015-01-22 03:47:46 +01:00
parent 07e10d1a7c
commit aca83a53ee
2 changed files with 11 additions and 3 deletions
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13
src/shared/log.c
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@ -314,14 +314,19 @@ static int write_to_console(
const char *object,
const char *buffer) {
char location[64];
struct iovec iovec[5] = {};
char location[64], prefix[1 + DECIMAL_STR_MAX(int) + 2];
struct iovec iovec[6] = {};
unsigned n = 0;
bool highlight;
if (console_fd < 0)
return 0;
if (log_target == LOG_TARGET_CONSOLE_PREFIXED) {
sprintf(prefix, "<%i>", level);
IOVEC_SET_STRING(iovec[n++], prefix);
}
highlight = LOG_PRI(level) <= LOG_ERR && show_color;
if (show_location) {
@ -1016,7 +1021,8 @@ int log_show_location_from_string(const char *e) {
}
bool log_on_console(void) {
if (log_target == LOG_TARGET_CONSOLE)
if (log_target == LOG_TARGET_CONSOLE ||
log_target == LOG_TARGET_CONSOLE_PREFIXED)
return true;
return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0;
@ -1024,6 +1030,7 @@ bool log_on_console(void) {
static const char *const log_target_table[_LOG_TARGET_MAX] = {
[LOG_TARGET_CONSOLE] = "console",
[LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed",
[LOG_TARGET_KMSG] = "kmsg",
[LOG_TARGET_JOURNAL] = "journal",
[LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",

1
src/shared/log.h
View File

@ -34,6 +34,7 @@
typedef enum LogTarget{
LOG_TARGET_CONSOLE,
LOG_TARGET_CONSOLE_PREFIXED,
LOG_TARGET_KMSG,
LOG_TARGET_JOURNAL,
LOG_TARGET_JOURNAL_OR_KMSG,