ex24.sh

Shall高级编程

#!/bin/bash
# Faxing (must have 'efax' package installed).

EXPECTED_ARGS=2
E_BADARGS=65
MODEM_PORT="/dev/ttyS2"   # May be different on your machine.
#                ^^^^^      PCMCIA modem card default port.

if [ $# -ne $EXPECTED_ARGS ]
# Check for proper number of command line args.
then
   echo "Usage: `basename $0` phone# text-file"
   exit $E_BADARGS
fi


if [ ! -f "$2" ]
then
  echo "File $2 is not a text file."
  #     File is not a regular file, or does not exist.
  exit $E_BADARGS
fi
  

fax make $2              #  Create fax-formatted files from text files.

for file in $(ls $2.0*)  #  Concatenate the converted files.
                         #  Uses wild card (filename "globbing")
			 #+ in variable list.
do
  fil="$fil $file"
done  

efax -d "$MODEM_PORT"  -t "T$1" $fil   # Finally, do the work.
# Trying adding  -o1  if above line fails.


#  As S.C. points out, the for-loop can be eliminated with
#     efax -d /dev/ttyS2 -o1 -t "T$1" $2.0*
#+ but it's not quite as instructive [grin].

exit $?   # Also, efax sends diagnostic messages to stdout.