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Follow-up to 92a4fb3: allow kernel log dupes around edge of seqno

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Although hihgly unlikely, if the kernel log sequence number (seqno)
reaches the end of its MAX value (18446744073709551615) we allow for
dupes to handle the wrap-around back to zero (0) in the counter.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg 2021-05-06 08:47:30 +02:00
parent 4e1aefaf3d
commit e5ee2446a0
1 changed files with 9 additions and 3 deletions
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12
src/syslogd.c
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@ -1187,9 +1187,15 @@ void printsys(char *msg)
while (isdigit(*p))
seqno = 10 * seqno + (*p++ - '0');
/* Check if logged already (we've been restarted) */
if (sys_seqno > 0 && seqno <= sys_seqno)
return;
/*
* Check if logged already (we've been restarted)
* Account for wrap-around at 18446744073709551615
*/
if (sys_seqno > 0 && seqno <= sys_seqno) {
/* allow dupes around the edge */
if (sys_seqno < 18446744073709551000)
return;
}
sys_seqno = seqno;
p++; /* skip ',' */