Difficulty with CAT redirection in script Post: 302990211

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Top Forums Shell Programming and Scripting Difficulty with CAT redirection in script Post 302990211 by demmith on Monday 23rd of January 2017 09:04:43 PM

01-23-2017

Registered User

Difficulty with CAT redirection in script

I have not been able to append the contents of many files into one file. I have executed the CAT command shown below separately substituting an actual path and file name for the array variable to verify that I have the syntax correct. The bottom line - nothing is happening with CAT. I am running the script with sudo. Please excuse all the debug statements - just verifying that the variables contain valid values. I am running this on Ubuntu 14.04.

Code:

#!/bin/bash
echo ""
echo "==============================================================================="
echo "This script copies all of the LocalConfig.pri files contents into another file."
echo "==============================================================================="
echo ""
cd /
echo "Changed directory to ..."
pwd

# Assign 'locate' results to a variable.
output=$(locate -b "LocalConfig.pri")

# Parse the $output variable into an array. Each line is a full path.
while read -r line; do outputArray+=("$line"); done <<<"$output"

# Loop through the array.
for idx in "${!outputArray[@]}"; do
    # Print array element index and contents.
    printf ' Output number %d is %s' "$idx" "${outputArray[idx]}"
    printf '\n'
    # Cat each file into one 'master' file.
    echo -e "\tconcatenating\n\t\t ${outputArray[idx]} \n\tinto \n\t\t./LocalConfigMaster.pri ..."
    cat "${outputArray[idx]}" >> ./LocalConfigMaster.pri
done

demmith

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LEARN ABOUT PHP

system

SYSTEM(3)								 1								 SYSTEM(3)

system - Execute an external program and display the output

SYNOPSIS

       string system (string  $command, [int  &$return_var])

DESCRIPTION

       system(3) is just like the C version of the function in that it executes the given $command and outputs the result.

	The  system(3)	call  also  tries  to  automatically flush the web server's output buffer after each line of output if PHP is running as a
       server module.

	If you need to execute a command and have all the data from the command passed directly back without any interference, use the passthru(3)
       function.

PARAMETERS

	      o $command
		- The command that will be executed.

	      o $return_var
		- If the $return_var argument is present, then the return status of the executed command will be written to this variable.

RETURN VALUES

	Returns the last line of the command output on success, and FALSE on failure.

EXAMPLES

       Example #1

	      system(3) example

	      <?php
	      echo '<pre>';

	      // Outputs all the result of shellcommand "ls", and returns
	      // the last output line into $last_line. Stores the return value
	      // of the shell command in $retval.
	      $last_line = system('ls', $retval);

	      // Printing additional info
	      echo '
	      </pre>
	      <hr />Last line of the output: ' . $last_line . '
	      <hr />Return value: ' . $retval;
	      ?>

NOTES

       Warning

	      When allowing user-supplied data to be passed to this function, use escapeshellarg(3) or escapeshellcmd(3) to ensure that users can-
	      not trick the system into executing arbitrary commands.

       Note

	      If a program is started with this function, in order for it to continue running in the background, the output of the program must be
	      redirected to a file or another output stream. Failing to do so will cause PHP to hang until the execution of the program ends.

       Note

	      When  safe  mode	is  enabled,  you can only execute files within the safe_mode_exec_dir. For practical reasons, it is currently not
	      allowed to have .. components in the path to the executable.

       Warning

	      With safe mode enabled, the command string is escaped with escapeshellcmd(3). Thus, echo y | echo x becomes echo y | echo x.

SEE ALSO

       exec(3), passthru(3), popen(3), escapeshellcmd(3), pcntl_exec(3), backtick operator.

PHP Documentation Group 														 SYSTEM(3)