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POExecute commands using function calls in shell scripts
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  1. POExecute commands using function calls in shell scripts
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    copied!<p>I am trying to execute a command using function calls in a shell script. When I pass the command to that function as an argument of that function, it does not work. </p> <p>Function definition: </p> <pre><code>function ExecuteCommand() ( # $1: User@Host # $2: Password # $3: Command to execute # Collect current IFS value OLD_IFS=$IFS # Set IFS value to new line feed IFS=$'\n' #Execute the command and capture the output EXPECT_OUTPUT=($(expect ssh_exec.expect $1 $2 $3)) #Print the output OUTPUT_LINE_COUNT=${#EXPECT_OUTPUT[@]} for ((OUTPUT_LINE_INDEX=0; OUTPUT_LINE_INDEX&lt;OUTPUT_LINE_COUNT; OUTPUT_LINE_INDEX++)) ; do echo ${EXPECT_OUTPUT[$OUTPUT_LINE_INDEX]} done # Get back to the original IFS IFS=$OLD_IFS </code></pre> <p>) </p> <p>Function call:</p> <pre><code>ExecuteCommand oracle@192.168.***.*** password123 "srvctl status database -d mydb" </code></pre> <p>And the output I get is: </p> <pre><code>spawn ssh oracle@192.168.***.*** {srvctl status database -d mydb} oracle@192.168.***.***'s password: bash: {srvctl: command not found </code></pre> <p>But when I don't pass the command as an argument of the function, it works perfectly: </p> <p>Function definition in that case: </p> <pre><code>function ExecuteCommand() ( # $1: User@Host # $2: Password # Collect current IFS value OLD_IFS=$IFS # Set IFS value to new line feed IFS=$'\n' #Execute the command and capture the output EXPECT_OUTPUT=($(expect ssh_exec.expect $1 $2 srvctl status database -d mydb)) #Print the output OUTPUT_LINE_COUNT=${#EXPECT_OUTPUT[@]} for ((OUTPUT_LINE_INDEX=0; OUTPUT_LINE_INDEX&lt;OUTPUT_LINE_COUNT; OUTPUT_LINE_INDEX++)) ; do echo ${EXPECT_OUTPUT[$OUTPUT_LINE_INDEX]} done # Get back to the original IFS IFS=$OLD_IFS </code></pre> <p>) </p> <p>Function call:</p> <pre><code>ExecuteCommand oracle@192.168.***.*** password123 </code></pre> <p>And I get the output just as I expected: </p> <pre><code>spawn ssh oracle@192.168.***.*** srvctl status database -d mydb oracle@192.168.***.***'s password: Instance mydb1 is running on node mydb1 Instance mydb2 is running on node mydb2 Instance mydb3 is running on node mydb3 </code></pre> <p>Please help me about what was wrong while passing the command as a function parameter here in the first case.</p>
 

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