How to implement SIGKILL and SIGTERM and print a message?
Hello,
I am running a webserver that uses sockets, forks, and children. The parent process listens for connections and the child processes the information.
I am trying to figure out why the code I have below SIGTERM, and SIGKILL never fire. I was messing around with the printfs and doesnt seem to be entering the switch for sigterm and sigkill and sighup.
I do have sigint and sighup working.
Can someone help me fix this code so that the server gracefully terminates when a sigkill and sigterm are detected. I was trying to get it so when the signal is recieved to terminate, the printf would write out terminating or something(basically so i know its working).
Hi all,
I need some urgent help.
we are using Dynix/ptx V4.5 on i386, have several processes and instances are running on the box round the clock.we increased the processes recently.
We have coded to handle the signals in our programs.
Recently, we noticed most of our processes are... (2 Replies)
Hi Gurus,
I am executing my Datastage jobs on UNIX operating System. While running the jobs i am getting the following error:
main_program: Unexpected termination by Unix signal 9(SIGKILL)
Can any one please let me know what are the possible situations where this SIGKILL will arrise?
... (9 Replies)
Hiiii..... Every one......
I am using /etc/issue file to display Pre-login Message
on my system, installed with SOLARIS-9.
I am getting this Message in White fonts having Black
background ( Colour of the Screen).....
So, is there ... (2 Replies)
Hi all
Geting this error while trying to print message as :
./logfunc: print: bad file unit number
heres what i m trying to do :
log_date="$(date '+%d/%m/%Y %H:%M:%S')"
log_type="Message"
print "${log_date}: ${log_type}"
print -u3 "${log_date}: ${log_type}"
this error is due to... (3 Replies)
Hi Friends,
I am using HP-UNIX(ksh). I want to print a message at specific line on the prompt screen. For Example:
for num in 1 10 3 145
do
echo $num // need to print this on the same line for each number
sleep 2
done
Actual Output:
==========
1
10
3
145
Expected Output:... (5 Replies)
Dear All,
I have machine with SunOS 5.10 Generic_138888-01 sun4v sparc SUNW,SPARC-Enterprise-T5120. Yesterday there is something at dmesg command :
May 25 18:09:02 cacao_launcher: Timeout occured on heartbeat channel, cleanup engaged
May 25 18:09:07 cacao_launcher: watchdog : warning,... (0 Replies)
Dear All
We have JBOSS server running on Linux we need to track Graceful Shutdown(SIGTERM) and Forceful Shutdown(SIGKILL) timestamp and write it into one file, I am new to UNIX Signal processing if is it possible how to detect it?
We generally do
$kill PID For Graceful... (5 Replies)
Which is sent to a terminal when it closes? SIGKILL? Reason I ask is I have a script I want to run in the background, but want it to run even if the terminal window is closed. Or, I'd like it to background itself if the terminal is closed but not if its running in an open window. I will learn how... (5 Replies)
I want to connect to oracle database from solaris...
After that i will drop and create a no.of tables.One of the table example is as below.
sqlplus -s usrname/password@dbname << SQL >> $logfile 2>&1
echo " dropping the table1" | tee logfile
DROP TABLE Table1
echo "creating the table1" |... (1 Reply)
Hi,
I am new to shell scripting and got a task to complete.
Task is : we have a log file where in i need to traverse through the whole file to check the string "Person Type missing in message" and after that i need to get EMPLID=xxxxxx from the file and print details in a different file.
... (1 Reply)
Discussion started by: suren424
1 Replies
LEARN ABOUT MOJAVE
tcl_detachpids
Tcl_DetachPids(3) Tcl Library Procedures Tcl_DetachPids(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_DetachPids, Tcl_ReapDetachedProcs, Tcl_WaitPid - manage child processes in background
SYNOPSIS
#include <tcl.h>
Tcl_DetachPids(numPids, pidPtr)
Tcl_ReapDetachedProcs()
Tcl_Pid
Tcl_WaitPid(pid, statusPtr, options)
ARGUMENTS
int numPids (in) Number of process ids contained in the array pointed to by pidPtr.
int *pidPtr (in) Address of array containing numPids process ids.
Tcl_Pid pid (in) The id of the process (pipe) to wait for.
int *statusPtr (out) The result of waiting on a process (pipe). Either 0 or ECHILD.
int options (in) The options controlling the wait. WNOHANG specifies not to wait when checking the process.
_________________________________________________________________DESCRIPTION
Tcl_DetachPids and Tcl_ReapDetachedProcs provide a mechanism for managing subprocesses that are running in background. These procedures
are needed because the parent of a process must eventually invoke the waitpid kernel call (or one of a few other similar kernel calls) to
wait for the child to exit. Until the parent waits for the child, the child's state cannot be completely reclaimed by the system. If a
parent continually creates children and doesn't wait on them, the system's process table will eventually overflow, even if all the children
have exited.
Tcl_DetachPids may be called to ask Tcl to take responsibility for one or more processes whose process ids are contained in the pidPtr
array passed as argument. The caller presumably has started these processes running in background and does not want to have to deal with
them again.
Tcl_ReapDetachedProcs invokes the waitpid kernel call on each of the background processes so that its state can be cleaned up if it has
exited. If the process has not exited yet, Tcl_ReapDetachedProcs does not wait for it to exit; it will check again the next time it is
invoked. Tcl automatically calls Tcl_ReapDetachedProcs each time the exec command is executed, so in most cases it is not necessary for
any code outside of Tcl to invoke Tcl_ReapDetachedProcs. However, if you call Tcl_DetachPids in situations where the exec command may
never get executed, you may wish to call Tcl_ReapDetachedProcs from time to time so that background processes can be cleaned up.
Tcl_WaitPid is a thin wrapper around the facilities provided by the operating system to wait on the end of a spawned process and to check a
whether spawned process is still running. It is used by Tcl_ReapDetachedProcs and the channel system to portably access the operating sys-
tem.
KEYWORDS
background, child, detach, process, wait
TclTcl_DetachPids(3)