Hi ,
i am beginner to Unix, I have one small script which execute java programme,it has java command input output structure . Right now i have given Input output structure manually that is on same directory, now how can i pass that by commandline
#!/bin/sh
java Classjava input.txt... (5 Replies)
Hey guys, seems I can't transfer the $ip into gawk in the following bash script, where the problem is?
#!/bin/bash
while read ip
do
gawk '$1~"$ip"' /tmp/source
done < /tmp/ip
++
cat /tmp/ip
192.16.1.1|192.168.1.2|192.168.1.3
10.1.1.1|10.1.1.2
10.8.1.0|10.8.1.1|10.8.1.2
--
cat... (11 Replies)
HI ,
Is there any way to return a value of variable from shell to perl script.
Code:
===
Perl file
my $diff1=system("sh diff.sh");
my $diff2=system("sh diff1.sh");
I need exit status of below commands
i.e 0 and 1 respectively.
Since in both the cases diff is working so system... (3 Replies)
ok, so, i want to do something like this where i store results of codings in a variable, but when i run it, it doesn' twork:
example
HOT=34
BOSS=`john=133
if ; then
ADDIT=`expr 8 + 6`
case $HOT in
34) expr 4 + 5 ;; esac
fi`
it seems shell scripts have a problem with having ``... (2 Replies)
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
I have a shell script main.sh which inturn call the python script ofdm.py, I want to pass two variables from shell script to python script for its execution. How do i achieve this ?????
Eg:
main.sh
a=3 b=3;
c= a+b
exec python ofdm.py
ofdm.py
d=c+a
Thanks in Anticipation (4 Replies)
hi,
i have a text file which conatins some fields delimited by space. some fields contains * as entries.
cron_file.txt
0 * * * *
0 3 * * *
i want to read each line 1 by 1 and store each field in seperate variables n a shell script.
i am unable to read the field that contains a *. how... (3 Replies)
I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist.
diff=$1$2.diff
id=$2 new=new_$diff
echo "My id is $1"
echo "I want to sync for user account $id"
##awk command I am using is as below
cat $diff | awk... (2 Replies)
I want to make a config file which contain all the paths.
i want to read the config file line by line and pass as an argument on my below function.
Replace all the path with reading config path line by line and pass in respective functions.
how can i achieve that?
Kindly guide.
... (6 Replies)
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
LEARN ABOUT MOJAVE
eval
eval(n) Tcl Built-In Commands eval(n)
__________________________________________________________________________________________________________________________________________________NAME
eval - Evaluate a Tcl script
SYNOPSIS
eval arg ?arg ...?
_________________________________________________________________DESCRIPTION
Eval takes one or more arguments, which together comprise a Tcl script containing one or more commands. Eval concatenates all its argu-
ments in the same fashion as the concat command, passes the concatenated string to the Tcl interpreter recursively, and returns the result
of that evaluation (or any error generated by it). Note that the list command quotes sequences of words in such a way that they are not
further expanded by the eval command.
EXAMPLES
Often, it is useful to store a fragment of a script in a variable and execute it later on with extra values appended. This technique is
used in a number of places throughout the Tcl core (e.g. in fcopy, lsort and trace command callbacks). This example shows how to do this
using core Tcl commands:
set script {
puts "logging now"
lappend $myCurrentLogVar
}
set myCurrentLogVar log1
# Set up a switch of logging variable part way through!
after 20000 set myCurrentLogVar log2
for {set i 0} {$i<10} {incr i} {
# Introduce a random delay
after [expr {int(5000 * rand())}]
update ;# Check for the asynch log switch
eval $script $i [clock clicks]
}
Note that in the most common case (where the script fragment is actually just a list of words forming a command prefix), it is better to |
use {*}$script when doing this sort of invocation pattern. It is less general than the eval command, and hence easier to make robust in |
practice. The following procedure acts in a way that is analogous to the lappend command, except it inserts the argument values at the
start of the list in the variable:
proc lprepend {varName args} {
upvar 1 $varName var
# Ensure that the variable exists and contains a list
lappend var
# Now we insert all the arguments in one go
set var [eval [list linsert $var 0] $args]
}
However, the last line would now normally be written without eval, like this: |
set var [linsert $var 0 {*}$args] |
SEE ALSO
catch(n), concat(n), error(n), interp(n), list(n), namespace(n), subst(n), tclvars(n), uplevel(n)
KEYWORDS
concatenate, evaluate, script
Tcl eval(n)