06-10-2010
Quote:
Originally Posted by
xs2punit
@Corona688:But, how will Ajax read this?? It a JS function.
Have the CGI2 script read from the fifo.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello everyone, say I have the following script, which contains serveral loops, if I run the script, it executes the loop one by one (after the a loop, it goes to b loop, then c, then d)
I figured I should be able to run all the loops at same time, but I don't know how, can anyone help a little... (2 Replies)
Discussion started by: fedora
2 Replies
2. Shell Programming and Scripting
Hi,
I want to run the command below in the background:
tail -f file.txt | grep "pattern"
The file file.txt will start getting its contents written after this command has started getting run.
So the flow will be like this
tail -f file.txt | grep "pattern"
#The line below will write data... (0 Replies)
Discussion started by: King Nothing
0 Replies
3. Shell Programming and Scripting
#!/bin/sh
firefox index.html
firefox secondpage.html
hey guys, im not able to open up two pages at the same time...
it always open up index.html first, and only after i close it, then the 2nd page pops up...
is there any way i can run both commands at the same time?
i appreciate any... (2 Replies)
Discussion started by: funnyguy123
2 Replies
4. UNIX for Dummies Questions & Answers
Hi all, I was just wondering if there are any consequences, or if its a problem to have a multiple scripts parsing (reading) the same file simultaneously.
For example, I have file.txt with lots of information.
cat script1.sh
grep "awesome" file1.txt > awesome.txt
cat script2.sh
grep -v... (4 Replies)
Discussion started by: torchij
4 Replies
5. Shell Programming and Scripting
Hi,
Is there a way to reflect the recent changes in the file being read when using "while read line" loop? Thanks!
script:
while read line
do
echo $line
cat x.dat|sed 's/2/6/g' > x.dat.temp
mv x.dat.temp x.dat
done < x.dat
The results is still getting below, even... (2 Replies)
Discussion started by: zzavilz
2 Replies
6. Shell Programming and Scripting
Hi
I have jobs (some 1000) defined in a file and I want to read those jobs and run a a command.
For example:
jobs.txt
abc
efg
I want to read the entire file and run the following command
Delete -JOB "abc"
Deleteing abc...
Delete -JOB "efg"
Delete efg...
Can somebody help me... (4 Replies)
Discussion started by: karan8810
4 Replies
7. Shell Programming and Scripting
i Run 2 scripts on all of around 50 nodes every day.
1.Mod_1.sh
2.Mod_2.sh
eg..
i run file with specific node no like
Mod_1.sh NODE_(node number)
Mod_2.sh NODE_(node number)
I want to run both file by using single script with unique node number.
Eg..
Mod_new.sh NODE_(node... (11 Replies)
Discussion started by: Ganesh Mankar
11 Replies
8. Shell Programming and Scripting
Hi All,
Need some help like how to exit from the script after updating the column in data base.
db2 connect to DB
STATUS=$(db2 "SELECT STATUS FROM XYZ )
echo $STATUS
Initially the status value will be '4' or 'NOT YET RUN'.
The Shell script has to run until the status value is updated... (7 Replies)
Discussion started by: sumanmca2006
7 Replies
9. Shell Programming and Scripting
Hello,
I need to run multiple shell processes simultaneously and output of the first process shall be the input of the second process but first process is never ending so both should be running in parallel. I do not wish to wait the end of the first process. I am under ubuntu 16.04.
... (3 Replies)
Discussion started by: baris35
3 Replies
LEARN ABOUT OPENDARWIN
fifo
fifo(3tcl) fifo(3tcl)
NAME
fifo - Create and manipulate u-turn fifo channels
SYNOPSIS
package require Tcl
package require memchan
fifo
DESCRIPTION
fifo creates a stream-oriented in-memory channel and returns its handle. There is no restriction on the ultimate size of the channel, it
will always grow as much as is necessary to accommodate the data written into it.
In contrast to the channels generated by memchan a channel created here effectively represents an U-turn. All data written into it
can be read out, but only in the same order. This also means that a fifo channel is not seekable.
The channels created here can be transferred between interpreters in the same thread and between threads, but only as a whole. It is
not possible to use them to create a bi- or unidirectional connection between two interpreters.
Memory channels created by fifo provide two read-only options which can be queried via the standard fconfigure command. These are
-length
The value of this option is the number of bytes currently stored in the queried memory channel.
-allocated
The value of this option is the number of bytes currently allocated by the queried memory channel. This number is at least as big as
the value of -length.
As the channels generated by fifo grow as necessary they are always writable. This means that a writable fileevent-handler will fire con-
tinuously.
The channels are also readable if they contain more than zero bytes. Under this conditions a readable fileevent-handler will fire continu-
ously.
NOTES
One possible application of memory channels created by memchan or fifo is as temporary storage device to collect data coming in over a pipe
or a socket. If part of the processing of the incoming data is to read and process header bytes or similar fifo are easier to use as they
do not require seeking back and forth to switch between the assimilation of headers at the beginning and writing new data at the end.
SEE ALSO
fifo2, memchan, null
KEYWORDS
channel, fifo, i/o, in-memory channel, memchan, stream
COPYRIGHT
Copyright (c) 1996-2003 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Memory channels 2.1 fifo(3tcl)