Hello.
I've been using nagios4 for a long time and for a long time I've been
having a problem: when I try to watch alert history for a service I get:
Error: Cannot open log file '/var/spool/nagios/nagios.log' for reading!
In fact:
# ls -l /var/spool/nagios/nagios.log
-rw-r----- 1 nagios nagios 925763 Feb 17 18:17 /var/spool/nagios/nagios.log
Apache won't be able to open it unless it's permission is 644.
I can manually change it and the problem will temporarily go away; alas,
the next day, after Nagios rotates the file, it will come back again
with 640.
There's a discussion about this at
https://github.com/NagiosEnterprises/nagioscore/issues/303
As you can see the problem is deemed as solved.
The source looks like it's been corrected:
# cd /usr/ports/net-mgmt/nagios4/
# make patch
# less work/nagios-4.5.11/base/logging.c
...
static FILE *open_log_file(void)
{
int fh;
struct stat st;
if(log_fp) /* keep it open unless we rotate */
return log_fp;
if ((fh = open(log_file, O_RDWR|O_APPEND|O_CREAT|O_NOFOLLOW,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) == -1) {
if (daemon_mode == FALSE)
printf("Warning: Cannot open log file '%s' for
writing\n", log_file);
return NULL;
> ...
"S_IROTH" is there, so the file should be created with "r+o" permission.
Still this doesn't happen.
Any hint on where to look?
bye & Thanks
av.
