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Shell Programming and Scripting

Check Error On Script

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# 1  
Old 01-20-2009
Check Error On Script
If I have a script createdb.sh
...
psql -U postgres -c "create database dbname"
...

I want to write something like
if IsErr(psql -U postgres -c "create database dbname")
ehco "OK"
else
ehco "NOT OK"

Thank for any reply first
# 2  
Old 01-20-2009
Code:
psql -U postgres -c "create database dbname"
if [ $? -eq 0 ];then
  echo OK
else
 echo Not OK
fi

# 3  
Old 01-20-2009
In shell scripting you usually work with checking return/exit codes of commands/programs. They are stored in $?.

Example:
Code:
echo "hello"
if [[ $? = 0 ]]; then
   echo "it worked"
else
   echo "something went wrong"
fi

# 4  
Old 01-22-2009
Quote:
Originally Posted by skar_a
Code:
psql -U postgres -c "create database dbname"
if [ $? -eq 0 ];then
  echo OK
else
 echo Not OK
fi

Quote:
Originally Posted by zaxxon
In shell scripting you usually work with checking return/exit codes of commands/programs. They are stored in $?.

Example:
Code:
echo "hello"
if [[ $? = 0 ]]; then
   echo "it worked"
else
   echo "something went wrong"
fi

Both of you thanks a lot!!.
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