03-10-2014
Check your script whether variable is assigned value before you use it in If
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Is there any way to do variable nesting using sh?
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Hi!!
LookVar=`find . -name "${input}" | wc -w`
if
then
cd $input
rm -f *
ftp -n -i $HostName << EOF
quote USER $User
quote PASS $Password
cd $Path
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echo $SoLookVar
if
then
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EOF
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Hi there,
I have nested case in my script. I am asking user, want to continue? if user press y/Y then my inner case should continue, rather than that my code start from beginning. I would like to continue my inner case until user press n or N. Is any one tell me how can I do?
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Hi Team,
I just want to check whether my nested if loop used is correct or not.
if ]
if ]
export1
else
export2
fi
else
if ]
export3
else
export4
fi
fi
Thanks
Shiva (5 Replies)
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HI everyone,
I am not able to find error in the script, when i run the script till
line No. 20
i.e, read var4
everything runs fine. After that the script exits out.
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Hi,
i m trying to create script which logic is like below.
if ; then
x=`cat /tmp/testoutput.log | grep STOP | wc -l`
y=`cat /tmp/testoutput.log | grep RUN | wc -l`
if ; then
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if ; then
echo "process running "
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----------------... (2 Replies)
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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)