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Full Discussion: Writing to standard error
Top Forums Shell Programming and Scripting Writing to standard error Post 302336903 by padmisri on Thursday 23rd of July 2009 05:05:19 AM
Old 07-23-2009
Writing to standard error

Hi,

I want to redirect the standard output to standard error whenever an error occurs for ex
if [ a -eq 0 ]
then
echo right
else
echo wrong
fi

I want to redirect the wrong to stderror .Adding a line 1>&2 will do that or is additional code to be added.How can i verify whether the output is written to standard error?Help me.

Regards,
Padmini
 

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ECHO(1) 						    BSD General Commands Manual 						   ECHO(1)

NAME
echo -- write arguments to the standard output SYNOPSIS
echo [-n] [string ...] DESCRIPTION
The echo utility writes any specified operands, separated by single blank (' ') characters and followed by a newline (' ') character, to the standard output. The following option is available: -n Do not print the trailing newline character. This may also be achieved by appending 'c' to the end of the string, as is done by iBCS2 compatible systems. Note that this option as well as the effect of 'c' are implementation-defined in IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. Applications aiming for maximum portability are strongly encouraged to use printf(1) to sup- press the newline character. Some shells may provide a builtin echo command which is similar or identical to this utility. Most notably, the builtin echo in sh(1) does not accept the -n option. Consult the builtin(1) manual page. EXIT STATUS
The echo utility exits 0 on success, and >0 if an error occurs. SEE ALSO
builtin(1), csh(1), printf(1), sh(1) STANDARDS
The echo utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. BSD
April 12, 2003 BSD
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