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Full Discussion: If condition
Top Forums Shell Programming and Scripting If condition Post 302272578 by Panos1962 on Wednesday 31st of December 2008 02:55:30 AM
Old 12-31-2008
Actually this is a pipeline consisting of two components (mysqldump and gzip). The success of this pipeline depends in the success of the two programs; either mysqldump may fail or gzip (or both ofcourse). It's better to rewrite these lines as follows:

Code:
set -o pipefail
mysqldump -u $USER -p$PASS $DB | gzip -9>/home/backup1/today_sme-$DATE.sql.gz
if [ $? -ne 0 ]; then
    blabla
else
    blabla
fi

The pipefail bash option is controlling the exit status of a pipeline (read the manual pages for bash). Of course the two components must be written correctly from their authors (exiting with non zero exit statuses when failures occur).
 

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LEARN ABOUT CENTOS

glbindprogrampipeline

GLBINDPROGRAMPIPELIN(3G)					   OpenGL Manual					  GLBINDPROGRAMPIPELIN(3G)

NAME

       glBindProgramPipeline - bind a program pipeline to the current context

C SPECIFICATION

       void glBindProgramPipeline(GLuint pipeline);

PARAMETERS

       pipeline
	   Specifies the name of the pipeline object to bind to the context.

DESCRIPTION

       glBindProgramPipeline binds a program pipeline object to the current context.  pipeline must be a name previously returned from a call to
       glGenProgramPipelines(). If no program pipeline exists with name pipeline then a new pipeline object is created with that name and
       initialized to the default state vector.

       When a program pipeline object is bound using glBindProgramPipeline, any previous binding is broken and is replaced with a binding to the
       specified pipeline object. If pipeline is zero, the previous binding is broken and is not replaced, leaving no pipeline object bound. If no
       current program object has been established by glUseProgram(), the program objects used for each stage and for uniform updates are taken
       from the bound program pipeline object, if any. If there is a current program object established by glUseProgram(), the bound program
       pipeline object has no effect on rendering or uniform updates. When a bound program pipeline object is used for rendering, individual
       shader executables are taken from its program objects.

ERRORS

       GL_INVALID_OPERATION is generated if pipeline is not zero or a name previously returned from a call to glGenProgramPipelines() or if such a
       name has been deleted by a call to glDeleteProgramPipelines().

SEE ALSO

       glCreateShader(), glCreateProgram(), glCompileShader(), glLinkProgram(), glGenProgramPipelines(), glDeleteProgramPipelines(),
       glIsProgramPipeline()

COPYRIGHT

       Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  http://opencontent.org/openpub/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						  GLBINDPROGRAMPIPELIN(3G)
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