I have a rather big script that i have written in ksh and it is falling over in two places with a 'test argument' error. I know this usually means that the if statement is not correct, but it is fine. I have looked through the rest of the script for any odd brackets or ` marks, but can't see... (2 Replies)
Hi All,
I am new to Shell scripting.
I have a log file containing XML Messages.Each XML Message is accompanied with a timestamp.I need to count the the number of messages that get logged in a particular timeinterval.Is there any command/Syntax to achieve this.
Any code/example is... (5 Replies)
Hi All,
I am new to shell scripting.
I have a variable which holds a numeric value.I have to check whether this variable holds a value between(0- 8),(8-17)(17-24).How do i write this syntax using if in shell scripting.
Thanks
Vignesh (2 Replies)
Hello All,
I looking for a way to verify the correction of shell script syntax.
Is there any switch like -c in perl which do this in shell ?
Thank You. (1 Reply)
Hi Guys,
iīve a question ... but itīs a litte bit tricky:
iīve a 3 php-scripts which runīs via cron at night. These script reads an xml-file a writes it in an MySQL-DB.
I named them (for example here ) Script1 - Script3. The XML-Files i named xml1 - xml3.
Now, iīve build a Batch-file,... (10 Replies)
hello everyone
i am beginner on shell scripting .and i am working on my project work on ad hoc network
i wrote a batch (.sh) to do a looping and execute a tcl script i wrote before in each iteration ..but i got this problem "
syntax error near unexpected token `('... (1 Reply)
I am trying to run a unix script in my home directory.Snippet below
echo "`date '+%Y%m%d_%H%M%S'` Getting ProductList.dat"
if ( -f $DIR/ProductList.dat) then
cp $DIR/ProductList.dat MigratedProductList.dat
else
echo "`date '+%Y%m%d_%H%M%S'`ProductList.dat does not exist; Processing... (4 Replies)
I am creating a shell script. In which, I need to get server name and server IP. I used this command in script.
servername=`cat /etc/hosts|grep `eval hostname`|awk '{print $2}'`
however, when execute script or put set -x to debug, it return:
line 13: syntax error at line 13: `|' unexpected... (4 Replies)
I want to make the file test condition a variable ($Prmshn in code below).
My goal is to use something like the first three unsuccessful if statetments since the 'if
#!/bin/ksh
test_input()
{
Prmshn=${1}
InFLNm=${2}
ifReq="-$Prmshn $InFLNm"
#the following three if statments fail:
#if ] ;... (10 Replies)
Discussion started by: ms63707
10 Replies
LEARN ABOUT REDHAT
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 +- }}
}
KEYWORDS
catch, error
Tcl 8.0 catch(n)