10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a requirement:
During copy command for example:
cp -rf <sourceDir> <destinationDir>
this command may fails for many reasons like:
1. source or destination directory does not exist
2. destination directory does not have sufficient space
3. directories are not mounted
... Or may... (3 Replies)
Discussion started by: ambarginni
3 Replies
2. Shell Programming and Scripting
Hi,
I have one shell script as below
while read SegList
do
if test -s ${SourceFile_Path}/${Segment_List_Temp}
then
ls -r -1 ${FTP_Path}/${SegList}.DAT.${Datelist}.GZ|cut -d '.' -f2>>${SourceFile_Path}/${List_Temp}
echo "IF above statment Fail I want to Create Emtpy File How to Trapp... (3 Replies)
Discussion started by: samadhanpatil
3 Replies
3. Shell Programming and Scripting
I'm trying to trap errors in a shell script executing an sftp command this way:
/usr/bin/sftp $FTP_USER@$FTP_SERVER <<EOF> $HOME/$ERR_FILE
cd $FTP_DIR
put $FILE_NAME
bye
EOF
I expect errors to be recorded in $ERR_FILE but they are not. The only thing in the $ERR_FILE is:
sftp> sftp>... (2 Replies)
Discussion started by: pochon
2 Replies
4. Solaris
Hello experts,
I am trying to trap system calls using ptrace available on Salaris. How to get the system call number which I am going to trap.
In Linux I have done like below:
ptrace(PTRACE_PEEKUSER, pid,
4 * ORIG_EAX, NULL);
where PTRACE_PEEKUSER : is the request, this specifies the... (1 Reply)
Discussion started by: Patel
1 Replies
5. Infrastructure Monitoring
Hello,
I have a problem with package and name space.
require "/Mehran/DSGateEngineLib/general.pl";
use strict;
sub System_Status_Main_Service_Status_Intrusion_Prevention
{
my %idpstatus;
my @result;
&General_ReadHash("/var/dsg/idp/settings",\%idpstatus);
#print... (4 Replies)
Discussion started by: Zaxon
4 Replies
6. UNIX for Dummies Questions & Answers
I am using unixs script to submit programs (SQRS) and need to trap any time of error that is received once the job finishes.
Examples of the type of errors I am getting
Error! SQR Failed To Process
mkdir: Failed to make directory
These are showing up in a log file but I do not want to... (3 Replies)
Discussion started by: TimHortons
3 Replies
7. Shell Programming and Scripting
hey all,
I have a script that creates and then distributes html files via scp on a 60 second cycle. On occasions the scp will hang and not complete with the cycle.
When running the scp command in the back ground it returns the PID. How do I trap $! in the script?
job=`echo $!` returns... (2 Replies)
Discussion started by: nhatch
2 Replies
8. Shell Programming and Scripting
Hello,
I have the following shell script to perform ftp:
ftp -n $HOST<<EOD
quote USER $USER
quote PASS $PASS
lcd $outputd
cd $dir
binary
put *.zip
quit
EOD
If any error is generated from this script then how to trap the error. For ex: let's say we entered wrong password then the... (5 Replies)
Discussion started by: radhika
5 Replies
9. Shell Programming and Scripting
Hi,
Can anybody tell me how to error trap an empty line. If i am asked for a password and I hit enter without entering any text, how do i display an error?
Thanks
Kev (6 Replies)
Discussion started by: kev112
6 Replies
10. UNIX for Dummies Questions & Answers
how do i trap enter command entered by a user.
actually i am throwing a screen this screen has no input but this screen should be displayes unless and until the user presses the enter key. as the user presses enter key the command prompt should come.
how do i achieve this (1 Reply)
Discussion started by: sunil bajaj
1 Replies
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)