I'm currently trying to develop a script which will find the child processes of a process ID already passed to the script.
I then need the script to look for spawned processes of these child processes and so on until it can't find any more.
For example
At the moment, I have to manually do this on the server -
I need to find child/spawned processes of 7133 so straight away, I need to grep for 7134.
Next, I get 7137
You get the idea. There are also cases where one parent process spawns multiple child processes and I need to be able to trace these down individually.
I then need to build a list of all these process ids so that I can kill -9 them.
I've build a script part way and thought I'd be able to assign the processes IDs to a variable using something like this:
This has failed to work because of multiple processes numbers appearing on the same line.
The script is using KSH.
Any help would be greatly appreciated (as I'm quickly running out of hair!)
Dear Unix Gurus,
Here is my query.
If i start a script,it inturn calls many other scripts ..and most of them continue to run in parallel.
Suppose,if i want to stop my script for some reason,i need to kill -9 each of the processes running.It becomes clumsy if the sub processes r more.
... (15 Replies)
I am trying to get the number of cpus on a farm of linux boxes (about 100 of them) by 'sshing' to each of them and checking their /proc/cpuinfo file.
So I have a local script localscript.sh on each of those 100 machines which retrieves the number of cpus in it by using its /proc/cpuinfo file.... (1 Reply)
Hi there,
I've install a testserver with SLES 11.0! I'll install/test XEN + WebServer not all things at the moment!
In a first time, I'd like to stop all unuse processes... but I don't understand all processes!
As someone a list of all processes with his signification and which should/could... (3 Replies)
ps -xfu <user name> this command line will list all the process currently running for <user name>.
I need to filter this output. I need all the process which are running for more than 3 days(excluding demon/sys process) . The list should include PID, PPID, STIME, process/command.
I am using... (20 Replies)
Hi:
How to list processes from all hosts, as opposed to the one you are working at?
"ps ux" appears to list processes of the user on a single host only.
Thanks.
N.B Phil (5 Replies)
Hello All
I am trying to get a list of process or applications runninging on the network only. I should emphasize that im not interested in the application or process if its not using the network.
I tried the good old netstat comand, but im not able to figure out how to list the running... (8 Replies)
I am trying to kill a list of processes. I have found these two ways to list a group of process id's on a single line. How would I go about killing all of these processes all on one line?
$ ps aux | grep 6243 | grep "a.out" | awk '{printf "%s ",$2}'ps aux | grep 6243 | grep "a.out" | awk... (8 Replies)
How do I list the process in a Unix based system which are running in background?
The following are options that I'm aware of, but they may not be appropiate.
a. using ps -ef , and getting records of processes for which STATUS='S'(uninterruptible sleep)
b. using jobs -l, and filtering... (5 Replies)
Here is the output of top command
So you see 99% of memory is in use -> Mem: 66005468k total, 65662548k used,
How can I find out all processes consuming this 99% memory in descending order of consumption i.e. starting with processes eating more memory.
I need the total of the output to... (3 Replies)
Discussion started by: mohtashims
3 Replies
LEARN ABOUT CENTOS
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)