LinuxQuestions.org - [SOLVED] STDIN, STDOUT, STDERROR Redirection for scripting

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STDIN, STDOUT, STDERROR Redirection for scripting

Hi there,

I'm writing a script to execute bash commands in the PHP CLI. I would like to suppress errors from bash and write my own error message if an error occurs.

So far I have this (assuming log.txt doesn't exist!):

Code:

tac log.txt 2>/dev/null

Which works as expected, tac kicks up an error but the error is suppressed, but when I use this:

Code:

tac < log.txt 2>/dev/null

I get:

Code:

bash: log.txt: No such file or directory

The tac error is suppressed but bash still gives me a dirty error.

Does anyone know how to suppress this?

Code:

(tac < log.txt) 2>/dev/null

Much appreciated! Thanks.