05-22-2008
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a 1-line file which looks like " First second third 4 five". I need to extract the number (here 4) in that line and put it in a variable. I will use the variable later to make few tests in my C shell script.
Can somebody help me? (2 Replies)
Discussion started by: haouesse
2 Replies
2. Shell Programming and Scripting
the script i am trying to write will allow my server to give itself an ip address.
So far i am up to the following but i'm stuck.
tracert -m 1 > traceroute.txt
1 routername (ipaddr) 2.094 ms 1.789 ms 1.243 ms
i want to get ipaddr as a variable and use it to write the ifcfg-eth... (7 Replies)
Discussion started by: aspect_p
7 Replies
3. Homework & Coursework Questions
I realize this is basic and probably obvious, but I'm pulling my hair out. I'm guessing this is just some flag on the file command or somesuch, but I can't find it. Help me get unstuck please?
EDIT: I guess what I'm asking is once I've got the ls -l output for a file, what command do I use to... (3 Replies)
Discussion started by: Timespike
3 Replies
4. Shell Programming and Scripting
Hi,
I need to parse a simple text file like below and store the word that starts with BR* to a variable say $BRno. I need to do this in sh script.
NOTE: the length of the numbers following BR is not constant (eg: it could be BR1234 or BR22233). And there is only 1 BRxxxxx in a file at a given... (6 Replies)
Discussion started by: script2010
6 Replies
5. UNIX for Dummies Questions & Answers
Here is the requirement, When I run the "run file KSH (sql)", it should substitute
'${pCW_Bgn_DT}' with 201120
and
'${pCW_End_DT}' with 201124
Input File
----------
$ cat prevwk.dat
201124 20110711
run file KSH (sql)
------------------
In this file, I want to use the variables... (1 Reply)
Discussion started by: shanrice
1 Replies
6. Red Hat
Hi all,
Hereby wish to have your advise for below:
Main concept is
I intend to get current directory of my script file.
This script file will be copied to /etc/init.d.
A string in this copy will be replaced with current directory value.
Below is original script file:
... (6 Replies)
Discussion started by: cielle
6 Replies
7. Shell Programming and Scripting
Hi,
I am trying to replace the value of a variable in a file through another script.
Example:
Filename : abc.txt contents:
a=10
b=20
c=30
Need to change the value of, say, b - Tried using the following:
sed "s/${b}/15/g" abc.txt
Have tried various forms of sed (with single quotes,... (4 Replies)
Discussion started by: rituparna_gupta
4 Replies
8. Shell Programming and Scripting
Hey,
So I have a shell script that outputs some variables, call them $a and $b. I know in shell scripting if I wanted to use the variables in another shell script I'd do
sh code.sh "$a" "$b"
How can I do something similar with perl? (2 Replies)
Discussion started by: viored
2 Replies
9. Shell Programming and Scripting
Hi Friend,
I have one file in which some number are mentioned and number of lines are vary every time
And i need to pass that number to my sql command from script.
Suppose i have file acc.txt
45456546456
45464564565
67854353454
67657612132
Number of records are vary every time.... (20 Replies)
Discussion started by: pallvi_mahajan
20 Replies
10. Shell Programming and Scripting
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)
Discussion started by: sadique.manzar
6 Replies
LEARN ABOUT OPENDARWIN
catch
catch(n) Tcl Built-In Commands catch(n)
__________________________________________________________________________________________________________________________________________________
NAME
catch - Evaluate script and trap exceptional returns
SYNOPSIS
catch script ?varName?
_________________________________________________________________
DESCRIPTION
The catch command may be used to prevent errors from aborting command interpretation. Catch calls the Tcl interpreter recursively to exe-
cute script, and always returns without raising an error, regardless of any errors that might occur while executing script.
If script raises an error, catch will return a non-zero integer value corresponding to one of the exceptional return codes (see tcl.h for
the definitions of code values). If the varName argument is given, then the variable it names is set to the error message from interpret-
ing script.
If script does not raise an error, catch will return 0 (TCL_OK) and set the variable to the value returned from script.
Note that catch catches all exceptions, including those generated by break and continue as well as errors. The only errors that are not
caught are syntax errors found when the script is compiled. This is because the catch command only catches errors during runtime. When
the catch statement is compiled, the script is compiled as well and any syntax errors will generate a Tcl error.
EXAMPLES
The catch command may be used in an if to branch based on the success of a script.
if { [catch {open $someFile w} fid] } {
puts stderr "Could not open $someFile for writing
$fid"
exit 1
}
The catch command will not catch compiled syntax errors. The first time proc foo is called, the body will be compiled and a Tcl error will
be generated.
proc foo {} {
catch {expr {1 +- }}
}
SEE ALSO
error(n), break(n), continue(n)
KEYWORDS
catch, error
Tcl 8.0 catch(n)