chytusk
September 12, 2025, 10:49am
1
Legato Log messages have the following format:
Jan 3 02:37:56 INFO | processName[pid]/componentName T=threadName | fileName.c funcName() lineNum | Message
Could anyone explain how to remove prefix such as date, timestamp etc..?
jyijyi
September 12, 2025, 2:31pm
2
You can save the logread to text file and then use awk and cut command
chytusk
September 13, 2025, 4:10am
3
Thank you for your response. I am already aware of that and will not to use post-processing. I want to know that is there any way to remove prefix from the legato?
jyijyi
September 13, 2025, 4:47am
4
logread probably is part of busybox, not inside legato
BTW, you can see the source code of legato, it also use post-processing method:
switch (exitCode)
{
case EXIT_FAILURE:
// Request a wakeup source for start program (timeout: 10s)
system("echo start 10000000000 > /sys/power/wake_lock");
// Sync file systems before rebooting.
sync();
// Dump the last 100 lines from logread excluding Legato: { INFO, DBUG,-WRN-} to
// prevent pollution by DEBUG, INFO or WRN messages.
retCode = system("logread | "
"egrep -v 'Legato: [ -][IDW][NBR][FUN][OG-]' | "
"tail -n 100 > /dev/console");
if (WIFEXITED(retCode) && (0 == WEXITSTATUS(retCode)))
{
LE_DEBUG("Failed to dump logs");
}
// Sync again file systems before rebooting.