02-09-2006
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
Discussion started by: halo98
1 Replies
2. UNIX for Dummies Questions & Answers
Hi everyone
I'm novice at Unix programming and I hope to post this thread in the correct place.
I have the following doubts:
1 Suppose we have some processes which are B's children process and another process A which has no relation with B and its children.
Can A do wait () for a... (5 Replies)
Discussion started by: Puntino
5 Replies
3. Shell Programming and Scripting
In one of the shell script (Where abinitio graph is called), the last line is wait ${!}. What does this wait ${!} mean ??? (2 Replies)
Discussion started by: risshanth
2 Replies
4. Shell Programming and Scripting
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
I need to start a background process, witch will be waiting... (2 Replies)
Discussion started by: alex_5161
2 Replies
5. Shell Programming and Scripting
Hello, I have been trying to figure out why the wait isnt waiting for the sleep process to complete till now and have found out that since sleep runs as different process and not a child process the wait isnt waiting.
script:
cat test|while read i
do
echo $i
sleep 30 &
done
wait
ps... (4 Replies)
Discussion started by: wannalearn
4 Replies
6. Shell Programming and Scripting
I have tracefile of three nodes (0 , 1 and 2 ) as follows:
+ 0.02 0 1 tcp 40 ------- 1 0.0 2.0 0 0
- 0.02 0 1 tcp 40 ------- 1 0.0 2.0 0 0
+ 0.02 2 1 tcp 40 ------- 2 2.1 0.1 0 1
- 0.02 2 1 tcp 40 ------- 2 2.1 0.1 0 1
r 0.025032 0 1 tcp 40 ------- 1 0.0 2.0 0 0
+ 0.025032 1 2 tcp 40 -------... (11 Replies)
Discussion started by: ASAADAOUI
11 Replies
7. HP-UX
Hello,
On a HP-UX 10.20 server I've executed something similar to this command:
# echo 'selall;info;wait;infolog;view;done' | /usr/sbin/cstm
But it returns sometype of "argument list too long" error.
I suppose there is a way to fix it by using xargs but I can't figure it out.
Any... (7 Replies)
Discussion started by: asanchez
7 Replies
8. Shell Programming and Scripting
Hi,
I am facing a strange issue,
when i call a script from my while loop in background it doesnt go in background, despite the wait i put below the whil loop it goes forward even before the process put in background is completed.
cat abc.txt | while read -u4 line
do
#if line contains #... (2 Replies)
Discussion started by: mihirvora16
2 Replies
9. Shell Programming and Scripting
Iam having a script which is used to load users and dumpfile in any given schema.Iam trying to autolog the script and have added two fucntion in it.
function init_stdout_redirect {
OUT_LOG=$1
OUT_PIPE=$(mktemp -u)
# Create the output pipe
mkfifo $OUT_PIPE
# Save stdout and... (15 Replies)
Discussion started by: Vikram_Tanwar12
15 Replies
10. Windows & DOS: Issues & Discussions
Hi,
I have run into a problem to which i can't seem to find any solution, posting here is my last resort.
Problem:
I am using plink to access my router and run a few configuration commands. When in enter configurations mode, instead of sending next command plink keeps on waiting for manual... (7 Replies)
Discussion started by: zaainabbas
7 Replies
LEARN ABOUT MOJAVE
tcl_reapdetachedprocs
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
Tcl Tcl_DetachPids(3)