load一个数据文件

#!/bin/bash

. data-file   # Load a data file.
# Same effect as "source data-file", but more portable.

#  The file "data-file" must be present in current working directory,
#+ since it is referred to by its 'basename'.

# Now, reference some data from that file.

echo "variable1 (from data-file) = $variable1"
echo "variable3 (from data-file) = $variable3"

let "sum = $variable2 + $variable4"
echo "Sum of variable2 + variable4 (from data-file) = $sum"
echo "message1 (from data-file) is \"$message1\""
# Note:                            escaped quotes

print_message This is the message-print function in the data-file.


exit 0

data-file

# This is a data file loaded by a script.
# Files of this type may contain variables, functions, etc.
# It may be loaded with a 'source' or '.' command by a shell script.

# Let's initialize some variables.

variable1=22
variable2=474
variable3=5
variable4=97

message1="Hello, how are you?"
message2="Enough for now. Goodbye."

print_message ()
{
# Echoes any message passed to it.

  if [ -z "$1" ]
  then
    return 1
    # Error, if argument missing.
  fi

  echo

  until [ -z "$1" ]
  do
    # Step through arguments passed to function.
    echo -n "$1"
    # Echo args one at a time, suppressing line feeds.
    echo -n " "
    # Insert spaces between words.
    shift
    # Next one.
  done  

  echo

  return 0
}  

[root@localhost shell]# ./ex38.sh

variable1 (from data-file) = 22
variable3 (from data-file) = 5
Sum of variable2 + variable4 (from data-file) = 571
message1 (from data-file) is "Hello, how are you?"

This is the message-print function in the data-file.