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Full Discussion: Check if a text file is empty or not (using ls -s)
Top Forums Shell Programming and Scripting Check if a text file is empty or not (using ls -s) Post 302395940 by Link_ on Wednesday 17th of February 2010 10:01:50 AM
Old 02-17-2010
Check if a text file is empty or not (using ls -s)
Hello,
I want to make a script which says if a text file is empty or not.
I tried two ways of making it, but I have problems with both of them.
Now I think that the better way is the ls -s solution (considering that an empty text file has a 0 weight, because "cat file.txt" fails when file is empty.

Here is my script:
Code:
#!/bin/bash
TEST=`ls -s test.txt`
if [ $TEST != "0 test.txt" ]
then
echo "Your file is not empty"
else
echo "Your file is empty"
fi

The error:
Code:
script.sh: line 4: [: too many arguments

 

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SPECRB(1)																 SPECRB(1)

NAME

       specrb - standalone test runner for test/spec and Test::Unit test suites

SYNOPSIS

       specrb [OPTIONS] [FILES | -a ] [-- untouched arguments]

DESCRIPTION

       The Ruby script specrb allows you to run tests written with test/spec from the command line. It can also be used for plain Test::Unit test
       suites. You can either specify the names of the test files you want to run, or let specrb find automatically all the tests in your project,
       by using the -a switch (see TEST/SPEC OPTIONS below).

       You can also use various options on the command line to pass parameters to the Ruby interpreterm or to modify the behavior of test/spec
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RUBY OPTIONS

       -e, --eval LINE
	   evaluate a LINE of code

       -d, --debug
	   set debugging flags (set $DEBUG to true)

       -w, --warn
	   turn warnings on for your script

       -I, --include PATH
	   specify $LOAD_PATH (may be used more than once)

       -r, --require LIBRARY
	   require the LIBRARY, before executing your script

TEST
/SPEC OPTIONS:
       -s, --specdox
	   do AgileDox-like output

       --rdox
	   do AgileDox-like output with RDoc formatting

       -a, --automatic
	   gather tests from ./test/, include ./lib/

TEST
::UNIT OPTIONS:
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	   runs tests matching regexp NAME

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	   runs tests in TestCases matching regexp TESTCASE

COMMON OPTIONS
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	   show a message similar to this manpage

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AUTHORS

       The test/spec library has been written by Christian Neukirchen <http://purl.org/net/chneukirchen>.

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