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Full Discussion: getting last error message
Top Forums UNIX for Dummies Questions & Answers getting last error message Post 302081618 by jim mcnamara on Wednesday 26th of July 2006 02:07:22 PM
Old 07-26-2006
Are you calling dlopen?

Unix is not windows. There is no GetLastError or FormatMessage function.
Normally, you check the return code. If it's a return code that indicates an error,
you have several options, probably perror is a good one to start with - exit:
Code:
#include <stdlib.h>
.........
........
retval=some_system_call();
if (retval==  <some value that the man page says is an error>   )
{
     perror("call to some_system_call returned a fatal error");
     exit(1);
}

 

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PERROR(1)						       MySQL Database System							 PERROR(1)

NAME
perror - explain error codes SYNOPSIS
perror [options] errorcode ... DESCRIPTION
For most system errors, MySQL displays, in addition to an internal text message, the system error code in one of the following styles: message ... (errno: #) message ... (Errcode: #) You can find out what the error code means by examining the documentation for your system or by using the perror utility. perror prints a description for a system error code or for a storage engine (table handler) error code. Invoke perror like this: shell> perror [options] errorcode ... Example: shell> perror 13 64 OS error code 13: Permission denied OS error code 64: Machine is not on the network To obtain the error message for a MySQL Cluster error code, invoke perror with the --ndb option: shell> perror --ndb errorcode Note that the meaning of system error messages may be dependent on your operating system. A given error code may mean different things on different operating systems. perror supports the following options. o --help, --info, -I, -? Display a help message and exit. o --ndb Print the error message for a MySQL Cluster error code. o --silent, -s Silent mode. Print only the error message. o --verbose, -v Verbose mode. Print error code and message. This is the default behavior. o --version, -V Display version information and exit. COPYRIGHT
Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc. This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/. SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/. AUTHOR
Sun Microsystems, Inc. (http://www.mysql.com/). MySQL 5.1 04/06/2010 PERROR(1)
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