Breaking "while read" also breaks the parent process
Hi,
I'm a bit confused. Maybe some master can explain to me what is happening.
I have a program that starts issuing output about himself loading.
I want to run it in another thread but I want to wait untill it's fully loaded.
Program sample:
If I run it like this, it will stay in another thread but I will not be sure it is "up and running":
So I tried to run it like this but the process dies very soon : Question: How can I stat myprogram and wait untill it outputs "up and running"?
Dears,
I've written a script which allows me to send mails in different formats with different attaches. Now I still want to add a feature to this script. My users would like to be able to receive a "read" or "delivered" receipt for their mails.
The script send mails on behalve of an specific... (1 Reply)
In this post, Perderabo's script says
echo 05/06/25 14:15:56 | IFS=" /:" read Y1 M1 D1 h1 m1 s1
which, if I am not wrong, will break the input into Y1, M1 et al.
I tried the following in my code
#! /bin/ksh
# per.sh
typeset -R2 HOUR=00
typeset -R2 MIN=00
typeset -R2 SEC=00
... (2 Replies)
Hallo,
i need a Prompting read in my script:
read -p "Enter your command: " command
But i always get this Error:
-p: is not an identifier
When I run these in c-shell i get this error
/usr/bin/read: read: bad option(s)
How can I use a Prompt in the read command? (9 Replies)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hi,
Could anyone please shed some light on the following script lines and what is it doing as it was written by an ex-administrator?
cat $AMS/version|read a b verno d
DBVer=$(/usr/bin/printf "%7s" $verno)
I checked that the cat $AMS/version command returns following output:
... (10 Replies)
I want to print any matching IP addresse in List1 with List 2;
List 1
List of IP addresses;
161.85.58.210
250.57.15.129
217.23.162.249
74.76.129.101
30.221.177.237
3.147.200.59
170.58.142.64
127.65.109.33
150.167.242.146
223.3.20.186
25.181.180.99
2.55.199.32 (3 Replies)
Hi ,
I am trying to read a list of hosts from a config file and trying to get file list from that host. For this I have used one while loop.
cat "$ARCHIVE_CFG_FILE" | sed '/^$/d' | sed '/^#/d' | while read ARCHIVE_CFG
do
SOURCE_SERVER_NAME=`echo "$ARCHIVE_CFG" | awk -F '|' '{ print... (2 Replies)
How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address
and column 3 contains “cc” e-mail address to include with same email.
Sample input file, email.txt
Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies
LEARN ABOUT DEBIAN
ns_thread
ns_thread(3aolserver) AOLserver Built-In Commands ns_thread(3aolserver)__________________________________________________________________________________________________________________________________________________NAME
ns_thread - commands
SYNOPSIS
ns_thread begin script
ns_thread begindetached script
ns_thread get
ns_thread getid
ns_thread wait tid
ns_thread yield
_________________________________________________________________DESCRIPTION
ns_thread begin:
begins a new thread which evaluates the specified script and then exits. It returns a thread ID that must eventually be passed to
ns_thread wait. (Failing to call ns_thread wait will eventually result in no new threads being created.)
ns_thread begindetached:
begins a detached thread that doesn't have to be (and can't be) waited for.
ns_thread get:
gets the thread ID of the current thread. The result is a thread ID that can be passed to ns_thread wait and may look something like
"tid532".
ns_thread getid:
gets the thread integer number for the current thread. The result is a small integer used for identifying threads is a human-read-
able way, such as "1" or "1120", for example.
ns_thread wait:
waits for the specified thread to exit. The tid argument is a thread ID returned by ns_thread begin or ns_thread get.
ns_thread yield:
causes the current thread to yield.
EXAMPLES
This example is similar to the example under the ns_sockselect function of connecting to the 10 servers and waiting to service them with
the ns_sockselect command. In this case, though, each connection gets it's own thread.
# This is the procedure which is evaluated for each thread and # handles a single connection to host number $i
proc getpage {i} {
global pages
# new thread will start here - first connect to host
set host [format "www%2d.foo.com" $i]
set fds [ns_sockopen $host 80
set r [lindex $fds 0]
set w [lindex $fds 1]
# next, send request 0r"
puts $w "GET /index.htm HTTP/1.0
flush $w
# then read page
set pages($i) [read $r]
# and close sockets
close $w
close $r
# thread goes away here and other threads waiting
# on ns_thread wait will wakeup }
# Here's the loop which creates the threads which run getpage. for {set i 1} {$i < 9} {incr i} {
set tids($i) [ns_thread begin "getpage $i"] }
# wait for the threads to exit and then process the pages for {set i 1} {$i < 9} {incr i} {
ns_thread wait $tids($i)
# output page
... process the page in $pages($i) put there by other thread ... }
Note that the code here is much simpler to follow than the ns_sockselect example; that's the benefit of multithreaded programming. However,
it uses more resources as threads need to be created and initialized. This can be a problem if you plan to create many threads.
SEE ALSO KEYWORDS
threads
AOLserver 4.0 ns_thread(3aolserver)