Here is an example code that shows the issue I have:
Code:
#!/bin/bash
counter() {
seq 1000 | while read NUM; do
echo $NUM
echo "debug: $NUM" >&2
sleep 0.1 # slow it down so we know when this loop really ends
done
}
counter | grep --line-buffered "[27]" | head -n1
If I understand it correctly, "head" finishes on the first match (as expected), but "grep" is not aware of it until it tries to write the next line (the second match). When it does, it finds out the pipe is closed so it also finishes.
That's normally not a problem, but if you have an infinite input stream containing only one match, it won't never stop. Any solution?
Hi Everyone
I am building some A Class HP boxes as web proxy servers, have just installed HP-UX 11.00 and am starting to configure one according to our standard build policy.
However on the A Class I just happened to place the software depot this error message keeps popping up every 2 mins:
... (1 Reply)
I have written the following program. The function of this prog is to read data from a file(source.c) and write into another file(dest.c) using pipes. I have just written a line in the source file.Im able to compile and run the program without errors. But the data is not written onto the other... (2 Replies)
hi all,
this is how my scrip looks like
#!/bin/sh
bindir='/opt/apps/script/bin'
datadir='/opt/apps/script/data'
dir='/opt/apps/script'
while : ; do
ls -1rt /opt/apps/script/data/check.txt*|tail -1 > /dev/null 2>&1
if ;then
chmod +rwx $bindir/dummy2.sh
... (8 Replies)
Hi all,
I tried the following command
$ find / -name xyx | ls -l
so logically it should show the listing of directory xyz , assuming there's only one instance of xyz . But the above command shows the listing of current directory instead.
I got the desired result using it in the... (4 Replies)
Hello Everybody,
thanks in advance for spending some time in my problem.
My problem is this:
I want to call a java-Programm out of my shell skript, check if die return code is right, and split the output to the normal output and into a file.
The following code doesn't work right, because in... (2 Replies)
I want to have a message send & receive through 2 half-duplex pipes
Flow of data
top half pipe
stdin--->parent(client) fd1--->pipe1-->child(server) fd1
bottom half pipe
child(server) fd2---->pipe2--->parent(client) fd2--->stdout
I need to have boundary structed message... (1 Reply)
Hi!
I'm having problems with pipes... I need comunnications with childs processes and parents, but only one child can comunnicate with parent (first child), others childs can't.
A brief of code:
if(pipe(client1r)<0){
perror("pipe");
}
... (1 Reply)
1. The problem statement, all variables and given/known data:
My problem is an infinite loop when i press any other key other then Y or y in the while loop. what i want it to do is return to the normal script outside of it if pressing N or n or keep asking the same question if its any other... (4 Replies)
Discussion started by: Ren_kun
4 Replies
LEARN ABOUT DEBIAN
rt-clean-sessions-4
rt-clean-sessions(8) Request Tracker Reference rt-clean-sessions(8)NAME
rt-clean-sessions - clean old and duplicate RT sessions
SYNOPSIS
rt-clean-sessions [--debug] [--older <NUM>[H|D|M|Y]]
rt-clean-sessions
rt-clean-sessions --debug
rt-clean-sessions --older 10D
rt-clean-sessions --debug --older 1M
rt-clean-sessions --older 10D --skip-user
DESCRIPTION
Script cleans RT sessions from DB or dir with sessions data. Leaves in DB only one session per RT user and sessions that aren't older than
specified(see options).
Script is safe because data in the sessions is temporary and can be deleted.
OPTIONS
older
Date interval in the "<NUM>[<unit>]" format. Default unit is D(ays), H(our), M(onth) and Y(ear) are also supported.
For example: "rt-clean-sessions --older 1M" would delete all sessions that are older than 1 month.
skip-user
By default only one session per user left in the DB, so users that have sessions on multiple computers or in different browsers will be
logged out. Use this option to avoid this.
debug
Turn on debug output.
NOTES
Functionality similar to this is implemented in html/Elements/SetupSessionCookie ; however, that does not guarantee that a session will be
removed from disk and database soon after the timeout expires. This script, if run from a cron job, will ensure that the timed out
sessions are actually removed from disk; the Mason component just ensures that the old sessions are not reusable before the cron job gets
to them.
perl v5.14.2 2013-05-22 rt-clean-sessions(8)