I don't quite understand what you mean exactly but i assume on program rerun you wish to reuse $p from the previous run.
Try saving it as a source file and calling it at any time. I have used the '/tmp/' directory to store the sourcefile in this demo...
And source at anytime in any bash shell:
Example longhand: OSX 10.14.1, default bash terminal.
Restart a terminal:
If this is not what you want then re-explain...
Hope this helps...
Last edited by wisecracker; 02-21-2019 at 04:31 PM..
This User Gave Thanks to wisecracker For This Post:
Hi,
I use AIX (ksh) and Linux (bash) servers. I'm trying to do scripts to will run in both ksh and bash, and most of the time it works. But this time I don't get it in bash (I'm more familar in ksh).
The goal of my script if to read a "config file" (like "ini" file), and make various report.... (2 Replies)
I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends.
As an example I've written a script called question (The fist command is to show what is the contents of the... (2 Replies)
Hi,
I have a loop running until a variable L that is read previously in the full script. I'd like to grep some information in an input file at a line that contains the value of the loop parameter $i.
I've tried to use grep, but the problem is nothing is written in the FILE files. It seems grep... (5 Replies)
Hi all! I think someone might be able to solve my problem pretty easily.
I am trying to run a bash loop with 3 variables. I know how to do:
for var1 in `cat list1`; do for var2 in `cat list2`; do for var3 in `cat list3`; command var1 var2 > var3; done; done; done
However, this will run all... (4 Replies)
Hello All,
Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....?
I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping
through a string containing some of these "Illegal Characters". Now... (5 Replies)
Dear mentors, I just need little explanation regarding for loop to give input to awk script
for file in `ls *.txt |sort -t"_" -k2n,2`; do
awk script $file
done
which sorts file in order, and will input one after another file in order to awk script
suppose if I have to input 2 or... (4 Replies)
Hello,
I'm trying to read the variable "pause" from a for loop without luck. The function is dependant on the outcome of the test within the loop. If i run this, pause is always 0 within the function. Any ideas?
Thanks.
pause=0
users=1
(for (( ; ; ))
do
speed=`cat speed.log`
... (7 Replies)
I am fairly new to bash and am not sure how to resolve this:
I have a series of geographical long/lat points eg. 50/-30 listed on separate lines in a file called junk2. I have input these into an array and am then using that array in a for loop. Towards the end of the loop I create a file called... (4 Replies)
In the else of the main if condition .
else
set lnk = $(readlink -f <path> | cut -d '/' -f7)
echo "$lnk"
if ]
When I run the above on command line , the execution seems to be fine and I get the desired output. But when I try to assign it to a variable within a loop... (12 Replies)
Cope sample1: test.sh
i=0
echo " Outside loop i = $i "
while
do
i=$(( $i + 1))
echo "Inside loop i = $i "
done
echo " Out of loop i is : $i "
When run output :
Outside loop i = 0
Inside loop i = 1
Inside loop i = 2
Inside loop i = 3
Inside loop i = 4
Inside loop i = 5
Inside... (8 Replies)
Discussion started by: Adarshreddy01
8 Replies
LEARN ABOUT DEBIAN
foreach
foreach(3tcl) Tcl Built-In Commands foreach(3tcl)__________________________________________________________________________________________________________________________________________________NAME
foreach - Iterate over all elements in one or more lists
SYNOPSIS
foreach varname list body
foreach varlist1 list1 ?varlist2 list2 ...? body
_________________________________________________________________DESCRIPTION
The foreach command implements a loop where the loop variable(s) take on values from one or more lists. In the simplest case there is one
loop variable, varname, and one list, list, that is a list of values to assign to varname. The body argument is a Tcl script. For each
element of list (in order from first to last), foreach assigns the contents of the element to varname as if the lindex command had been
used to extract the element, then calls the Tcl interpreter to execute body.
In the general case there can be more than one value list (e.g., list1 and list2), and each value list can be associated with a list of
loop variables (e.g., varlist1 and varlist2). During each iteration of the loop the variables of each varlist are assigned consecutive
values from the corresponding list. Values in each list are used in order from first to last, and each value is used exactly once. The
total number of loop iterations is large enough to use up all the values from all the value lists. If a value list does not contain enough
elements for each of its loop variables in each iteration, empty values are used for the missing elements.
The break and continue statements may be invoked inside body, with the same effect as in the for command. Foreach returns an empty string.
EXAMPLES
This loop prints every value in a list together with the square and cube of the value:
set values {1 3 5 7 2 4 6 8} ;# Odd numbers first, for fun!
puts "Value Square Cube" ;# Neat-looking header
foreach x $values { ;# Now loop and print...
puts " $x [expr {$x**2}] [expr {$x**3}]"
}
The following loop uses i and j as loop variables to iterate over pairs of elements of a single list.
set x {}
foreach {i j} {a b c d e f} {
lappend x $j $i
}
# The value of x is "b a d c f e"
# There are 3 iterations of the loop.
The next loop uses i and j to iterate over two lists in parallel.
set x {}
foreach i {a b c} j {d e f g} {
lappend x $i $j
}
# The value of x is "a d b e c f {} g"
# There are 4 iterations of the loop.
The two forms are combined in the following example.
set x {}
foreach i {a b c} {j k} {d e f g} {
lappend x $i $j $k
}
# The value of x is "a d e b f g c {} {}"
# There are 3 iterations of the loop.
SEE ALSO for(3tcl), while(3tcl), break(3tcl), continue(3tcl)KEYWORDS
foreach, iteration, list, looping
Tclforeach(3tcl)