I am stuck and worried. My assignment was due a day ago and I was too busy completing other assignments due during the same time. I worry that not completing this assignment will fail me. Need urgent help in completing the script asap. I dont want to sound pushy to get the answer but just wanted to explain the situation.
- The problem statement, all variables and given/known data:
I have mentioned a detailed requirement to be very clear. The points with '*' are the tasks that the script is
expected to do. All other information provided is for clear understanding of the script functionality.
The basic form of the script will simply send a copy of all lines that contain either "error" or "warning"
to the user specified in the script as RECIPIENT. Note that RECIPIENT is a shell variable that will contain
an e-mail address.
The basic script will be able to look at a log file periodically and report on any new lines that contain
either "error" or "warning". The search for this text is to be "case insensitive". This means that the script
needs to accept a line containing either "error", "Error", "ERROR" or the word error spelt in any other
combination of upper and lower case letters as being functionally equivalent.
The basic script, named "logmon" (for log monitor) will need to do the following:
-
be able to run in an environment that does not include a path. (i.e. the environment provided by
cron) -
accept the name of a log file as the sole command line argument
-
search the specified log file for lines that have been added since the previous search.
-
construct an e-mail reporting any lines that contain either "error" or "warning" in any combination
of upper and lower case letters -
send the e-mail to the address specified in the RECIPIENT shell variable which is defined within the
script
Optional requirements for now
Include only putting a single copy of a message in an e-mail, but reporting
how many times the message is repeated. Also modifying the script so that the same script will either
report via e-mail, or directly to a terminal, depending on how it is called. The final option will
be a system that reports errors directly to the root console.
(Note that this will need to be implemented in a way that sends the message to your account and does not actually send a message to root for testing purpose.)
Please add a comment or comments in your script that state which, if any, of the optional requirements have been implemented.
-
modify the script so that, instead of listing multiple lines with the same message, it lists one instance
of each duplicated line (Note that for the purposes of this requirement, two lines that share everything
except the timestamp are considered to be identical lines.) -
follows the single instance of a duplicated line with a line that reports how many times the previous
line repeats -
add code that will report the above to the command line when it is called with the name "logcheck"
(How could you have one script that has two different names?)
Note that any data that needs to be passed from one time when the script runs to the next time cannot be passed in a temporary file. It will
need to be stored in a secure location.
Certain commands that I thought might be helpful are diff, wc, tail, grep, awk, and sort. Can anyone think of a way to do the above. Any suggestions
are most welcome.
Thanks in Advance for all the help.
- Relevant commands, code, scripts, algorithms:
Algorithm of the program that I have come up with
Step1: Enter Logname(name of log file) as argument when running script
Step2: Check if argument is given, if not then exit with error else check for filename
Step3: If filename given as argument does not exists, exit with error else check for search string pattern in log file
Step4: if string pattern found then copy log entry to a variable and temp file
Step5: Check for similar log entries ignoring date stamp
Step6: if similar log entry found, increment counter
Step7: if currently running script name is logmon then send email else send message to current terminal
- The attempts at a solution (include all code and scripts):
#!/bin/sh -x
#
#
#
PRINTF=/usr/bin/printf
GREP=/usr/bin/grep
TAIL=/usr/bin/tail
#To if log file to check has been given as argument when running the script
if [ $# -eq 0 ] ; then
$PRINTF "%s: Need the name of the log that needs to be checked\n" $0
$PRINTF $0 "\tis the name of the script you are running" #Just to display what is the script name
$PRINTF $1 "\tis the name of the log file you want to scan" #Just to display what is the argument
exit 1
fi
# script to send simple email
SUBJECT="Enter Subject Here" # email subject
RECIPIENT="yourmailid@domain.com" # Email To ?
EMAILMESSAGE="My test script" # Email text/message
/bin/mailx -s "$SUBJECT" "$RECIPIENT" < $EMAILMESSAGE # send an email using /bin/mail
# script to check for string to search
SEARCH='grep -i -E -q 'error|warning'' #search for strings error or warning in any form
SCAN_LOG='tail $1|[${SEACH}]' #scanning logfile for string pattern
#Keep track of similar entries
MESSAGE_COUNTER=0
MESSAGE="$LOG_ENTRY"
- Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
RMIT University, Melbourne,Australia,Don,Unix Essentials for System Administrators - RMIT University
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
---------- Post updated at 10:37 AM ---------- Previous update was at 10:11 AM ----------
The log file structure looks like below
Apr 26 03:18:54 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 03:21:25 goanna.cs.rmit.edu.au last message repeated 3 times
Apr 26 03:31:41 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.notice] (//Node[server_base]/pca/File[/opt/isunix/output]) Dependency file[/var/tmp/patchdiag.xref] has 1 failures
Apr 26 03:31:41 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.warning] (//Node[server_base]/pca/File[/opt/isunix/output]) Skipping because of failed dependencies
Apr 26 03:31:41 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.notice] Finished catalog run in 134.93 seconds
Apr 26 03:40:55 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 03:44:40 goanna.cs.rmit.edu.au last message repeated 3 times
Apr 26 03:45:56 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 388765 daemon.error] Could not send message from queue: /var/SUNWsrspx/SRSQueueStore/store/queues/REGISTRATION/registration
Apr 26 03:49:11 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 03:52:52 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 601329 daemon.warning] QueueStore reclaimed 1 entry, 6144 bytes
Apr 26 04:05:59 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.warning] (//Node[server_base]/pca/Exec[pca-generate-missingrs]) Skipping because of failed dependencies
Apr 26 04:05:59 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.notice] (//Node[server_base]/pca/File[/opt/isunix/output]) Dependency file[/var/tmp/patchdiag.xref] has 1 failures
Apr 26 04:05:59 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.warning] (//Node[server_base]/pca/File[/opt/isunix/output]) Skipping because of failed dependencies
Apr 26 04:06:00 goanna.cs.rmit.edu.au puppetd[25496]: [ID 702911 daemon.notice] Finished catalog run in 135.37 seconds
Apr 26 04:06:41 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 04:07:56 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 388765 daemon.error] Could not send message from queue: /var/SUNWsrspx/SRSQueueStore/store/queues/REGISTRATION/registration
Apr 26 04:11:11 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 04:22:56 goanna.cs.rmit.edu.au SRS Proxy[17590]: [ID 663108 daemon.error] Could not upload bulk message
Apr 26 04:25:26 goanna.cs.rmit.edu.au last message repeated 2 times
---------- Post updated at 05:11 PM ---------- Previous update was at 10:37 AM ----------
If someone could help me out in rectifying the problem!!!
#!/bin/sh -x
#
#
#
PRINTF=/usr/bin/printf
GREP=/usr/bin/grep
TAIL=/usr/bin/tail
LOG_FILE="$1"
#To check if log file to check has been given as argument when running the script
if [ $# -ne 0 ] ; then
$PRINTF "%s: Is the name of the log file you will be scanning. \n" $1
$PRINTF $LOG_FILE"\n"
if [ -f $LOG_FILE ]; #if logfile exits
then
echo "File $LOG_FILE exists \n"
# script to check for string to search
SEARCH='grep -i -E -q 'error|warning'' #search for strings error or warning in any form
SCAN_LOG='tail $1|[${SEARCH}]' #scanning logfile for string pattern
# script to send simple email
SUBJECT="Error/Warning messages in logfile" # email subject
RECIPIENT="emailid@domain.extension" # Email To ?
EMAILMESSAGE="SCAN_LOG" # Email text/message
/bin/mailx -s "$SUBJECT" "$RECIPIENT" < $EMAILMESSAGE # send an email using /bin/mail
else
echo "File $LOG_FILE does not exists \n"
fi
else
$PRINTF "%s: Need the name of the log that needs to be checked\n" $0
# EXIT (1)
fi
The output that I got for the above code :
> sh logmon1 log-out
log-out: Is the name of the log file you will be scanning.
log-out
File log-out exists
logmon1: warning: not found
logmon1: SCAN_LOG: cannot open
thanks for pointing that out. I will remember to take that out as it looks a bit misleading.