sh 庆典

Posted 2021-05-07

_strlen() { #print the length of a string, return 1 on failure 
     [ -z "${1}" ] && return 1 
     printf "%s\\n" "${#1}" 
} 
#==================================================== Example ==== 
#_strlen "hello world!" #returns "12" 
#================================================================= 

READ A FILE INTO ARRAY

You can use a loop to read each line of your file and put it into the array

# Read the file in parameter and fill the array named "array"
getArray() {
    array=() # Create array
    while IFS= read -r line # Read a line
    do
        array+=("$line") # Append line to the array
    done < "$1"
}

getArray "file.txt"
How to use your array :

# Print the file (print each element of the array)
getArray "file.txt"
for e in "${array[@]}"
do
    echo "$e"
done

function get_script_dir () {
		# Capture script directory (Full)
		# Resolve if its symlink
		# Call as : echo "$(get_script_dir)"
     SOURCE="${BASH_SOURCE[0]}"		
     while [ -h "$SOURCE" ]; do
          DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
          SOURCE="$( readlink "$SOURCE" )"
          # If $SOURCE was a relative symlink (so no "/" as prefix, need to resolve it relative to the symlink base directory
          [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
     done
     DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
     echo "$DIR"
}

dirsize () {

	# Gets directory size
	# Call as dirsize $dir_address
du -shx * .[a-zA-Z0-9_]* 2> /dev/null | \
egrep '^ *[0-9.]*[MG]' | sort -n > /tmp/list
egrep '^ *[0-9.]*M' /tmp/list
egrep '^ *[0-9.]*G' /tmp/list
rm -rf /tmp/list
}

usage(){
echo "Usage: $0 [option] [filename] [numerical]"
echo "Example: ./columncutfin.bsh -d filename.txt 4"
echo "Options : -d : delimiter"
echo "          -b : columns (single space)"
echo "          -t : columns (tab)"
exit 1
}

dirsize () {

	# Gets directory size
	# Call as dirsize $dir_address
du -shx * .[a-zA-Z0-9_]* 2> /dev/null | \
egrep '^ *[0-9.]*[MG]' | sort -n > /tmp/list
egrep '^ *[0-9.]*M' /tmp/list
egrep '^ *[0-9.]*G' /tmp/list
rm -rf /tmp/list
}

###################################################

# Convert to uppercase
function toupper(){             

						#  Converts string(s) passed as argument(s)
						#+ to uppercase

  if [ -z "$1" ]       	#  If no argument(s) passed,
  then                 	#+ send error message
    echo "(null)"      	#+ (C-style void-pointer error message)
    return             	#+ and return from function.
  fi  

  echo "$@" | tr a-z A-Z
  # Translate all passed arguments ($@).

  return

# Use command substitution to set a variable to function output.
# For example:
#    oldvar="A seT of miXed-caSe LEtTerS"
#    newvar=`tolower "$oldvar"`
#    echo "$newvar"    # a set of mixed-case letters
#
}

counter=$2

case $1 in

	-f) factorial=1
		while [ $counter -gt 0 ]
		do
			factorial=$(($factorial * $counter))
			counter=$(( $counter - 1 ))
		done
		echo "The factorial is $factorial"
		;;
	
	-a) sumofparts=0
		while [ $counter -gt 0 ]
		do
			sumofparts=$(($sumofparts + $counter))
			counter=$(( $counter - 1 ))
		done
		echo "The sumofparts is $sumofparts"
		;;
esac

count_input_dir(){

	file_in=$1
	counter=`wc -l | awk '{ print $1 }'`
	echo $counter	
}

function chk_args()
{

	# Checks number of arguments
	# Call as chk_args $#
	local        nbr_args=$1
  
	if [ $nbr_args -ne $ARGS_NBR ]; then
		echo "Wrong number of parameters = " $nbr_args
		echo "Usage: " $this_job " <parm_srch_str> <parm_file_out>"
		exit 69
	else
		# Print a /correct/ message and continue
		echo "Correct number of paramaters = $ARGS_NBR supplied "
		echo "Proceeding..."; echo
	 # In case we need to assign parameters to variables
	 # Call as chk_Args $# $1 $2
     # parm_srch_str=$2
     # parm_file_out=$3
     return 0
  fi
}

function chk_abnd()
{
  local     abnd
  
  abnd=$1
  date
  if [ $abnd -ne 0 ]; then
    echo "Failed with status " $abnd; echo
    #rm +++++++++++++
    exit $abnd
    #return $abnd
  else
    echo "Done"; echo
  fi
}