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how to make some condition when program/tool unsuccesfully ends with error..

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# 1  
Old 03-18-2010
Question how to make some condition when program/tool unsuccesfully ends with error..
Simply, when i have tool "pdftotext", "sed" or "wget" and if this tool make an error in converting or downloading or something, I want to terminate my script...something like:

if [ pdftotext throws error/exception ]; then
exit 1
fi

bud I dont know how..can you help guys?Smilie
# 2  
Old 03-18-2010
Code:
pdftotext <arg..>

if [ $? -eq 0 ]; then
  echo "Success"
else
  echo "Failed"
  exit 1
fi

# 3  
Old 03-18-2010
what does [ $? -eq 0 ] means

//ah i've already noticed the $? is number of errors occured.

thanks
Last edited by Lukasito; 03-18-2010 at 04:25 PM..
# 4  
Old 03-18-2010
Quote:
Originally Posted by Lukasito
what does [ $? -eq 0 ] means
Have a read of this: Exit and Exit Status
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