Either the constructor of Connection, or the Query() method throws an exception of type const char *. You can catch it, by enclosing the calls with try, and adding a catch block, like:
Code:
try {
Connection DbConnection(Host, Database, UserId, Password);
query="select * from the test"; // test is my database
result = DbConnection.Query(query); // perform the required database operation..
}
catch (const char *errmsg)
{
std::cerr << "error message from connection: " << errmsg << "\n";
return 1;
}
Say in unix (AIX) m/c, I am logged in with s1 user and want to start process p1 with user credentials of s2.
I can do manually in this way:
#su - s2
#enter password for s2> somePassword
$ p1
But all this I have to do through a java program. How to pass the password through program.
One... (1 Reply)
Hi all,
I tried writing an .ec program connecting to informix database
from solaris platform Sun 5.7
informix version that i had to used when i compiled the program was 9.21.UC3
the binary when i ported solaris box with informix version 9.40.UC5 i am unable to run that
i am encountering... (0 Replies)
Hi guys
I tried to convert this c++ code to c shell script but there are some bugs and I don't know how to solve it.
This code prints the three variables in decreasing order:
int main()
{
int x,y,z;
cin >> x >> y >>z;
if ( x < y )
if ( x < z )
if ( y < z )
cout << x <<" " <<... (2 Replies)
hey everybody,
i am currently working on solaris 10 os on a m5000 server. my problem is when i want the exact size of a program in execution, i am unable to do it. earlier i thought the RSS field of prstat but because of its large size it cant be the size. pmap -x shows some output but it includes... (2 Replies)
I am entirely new to shell scripting and would like to create a script to execute a java program called Main. I've already compiled it and placed the .java and .class files at /root/javaTest. Next I made a shell script that simply contained: java /root/javaTest/Main . I made the script... (2 Replies)
Hello,
Please help me out to execute this perl program:
#!/usr/bin/perl -w
use strict;
use Win32::OLE qw(in with);
use Win32::OLE::Const 'Microsoft Excel';
$Win32::OLE::Warn = 3; # die on errors...
# get already active Excel application or open new
my... (6 Replies)
Hello,
Met a problem when compiling a C++ program from source code without error, but when ran it there was always an error message:
./Ray: error while loading shared libraries: libmpi_cxx.so.1: cannot open shared object file: No such file or directoryAs the error points to openmpi which was... (0 Replies)
Hello Friends,
I have written a code for the unisex bathroom which makes a policy that when a woman is in the bathroom only other women may enter, but not men, and vice versa. This program consists of four functions which a user defines but these functions are not properly working while... (4 Replies)
Discussion started by: Ravi Tej
4 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)