Assuming you mean "when does a process fail to write to /dev/log?"
/dev/log is a semi-standard convention for syslog - syslog listens on this UNIX socket, and writes what is written there according to the rules in it's configuration file.
Given that, you've got three reasons why a process might not be able to log:
The process in question isn't set up to do syslog. Using syslog is optional, and needs to be part of the process code.
syslogd isn't running, so there's nothing reading from that socket.
There is a syslogd running, and the process is set up to log to syslog, but it fails before it reaches the part of it's code when it does.
To check for the first, if you have the source code for the process, check it for calls to openlog(), syslog(), and closelog(), or if it's a shell script, check for calls to the logger program. Perl scripts will usually use Sys::Syslog or something similar.
To check for the second, do:
Code:
$ ps -efawww | egrep syslog
or even better
Code:
# lsof /dev/log
and see what has /dev/log open
To check for the third, well, you might try running the process under a debugger, and see if you can catch any writes to /dev/log or calls to syslog. Or, you could run the process via "strace" (truss on some Unixes) and look for writes that way.
Here is my test code
process = sp.Popen( + ,
bufsize=1,
universal_newlines=True,
stdout=sp.PIPE, stderr=sp.STDOUT,
cwd=src_home)
output, _ =... (2 Replies)
Hello Team-
we would like to implement an approach which has to write the log file simultaneously
when .sql file is executing by Unix process. At present,it is writing the log file
once the process is completed. I've tested the current process with the below
approaches and none of them... (1 Reply)
Hi Guru's,
I just want to have an idea on how to restart a particular step when it fails?
SCENARIO
we have plenty of steps such as the following below:
Step 1
copy file from source to target location which is in a different server.
Step 2
create initial and incremental process
... (4 Replies)
Hi,
I have the following 3 test files to test setuid bit which if it works I would like to implement in our application. However setuid doesnot seem to be having any impact on my test below.Following are the 3 files of interest in /tmp/ folder.
$ ls -ltr *env*
-rw------- 1 g332008 users 6... (23 Replies)
If we have 3 process to write to same log file at the same time like below. will it cause the data outdated because the multiple process writing same time? It this a safe way to keep the log for multiple process?
p1 >> test.log &;
p2 >> test.log &;
p3 >> test.log &
Thanks, (5 Replies)
Hi,
We have smb client running on two of the linux boxes and smb server on another linux system. During a backup operation which uses smb, read of a file was allowed while write to the same file was going on.Also simultaneous writes to the same file were allowed.Following are the settings in the... (1 Reply)
Heya
I want to start a new background-process like this:
/tools/bin/bretestdriver QMGR=$QMGR REQUEST=$REQUEST CONTROL=$INPUTSAS $TESTCASE #>/dev/null &
#>/dev/null &
It doesn't work. like this it ignors #>/dev/null .
does anybody know how i could do this?
Thanks... (3 Replies)
Hello,
i am using finch (unix commandline instant messaging client using libgnt) which is running connected to /dev/pts/1
Now I would like to "remote control" the program by sending the key combinations normally typed on the keyboard from a programm in another shell. So I tried:... (0 Replies)
