Advanced Bash−Scripting Guide

[−c localdirectory] [−m filepattern] [−v]"
ftpflags="−i −n"
verbflag=
set −f
# So we can use globbing in −m
set x `getopt vh:d:c:m:f: $*`
if [ $? != 0 ]; then
echo $usage
exit 65
fi
shift
trap 'rm −f ${TMPFILE} ; exit' 0 1 2 3 15
echo "user anonymous ${USER−gnu}@${SITE} > ${TMPFILE}"
# ==> Added quotes (recommended in complex echoes).
echo binary >> ${TMPFILE}
for i in $* # ==> Parse command line args.
do
case $i in
−v) verbflag=−v; echo hash >> ${TMPFILE}; shift;;
−h) remhost=$2; shift 2;;
−d) echo cd $2 >> ${TMPFILE};
if [ x${verbflag} != x ]; then
echo pwd >> ${TMPFILE};
fi;
shift 2;;
−c) echo lcd $2 >> ${TMPFILE}; shift 2;;
−m) echo mget "$2" >> ${TMPFILE}; shift 2;;
−f) f1=`expr "$2" : "\([^:]*\).*"`; f2=`expr "$2" : "[^:]*:\(.*\)"`;
echo get ${f1} ${f2} >> ${TMPFILE}; shift 2;;
−−) shift; break;;
esac
done
if [ $# −ne 0 ]; then
echo $usage
exit 65 # ==> Changed from "exit 2" to conform with standard.
fi
if [ x${verbflag} != x ]; then
ftpflags="${ftpflags} −v"
fi
if [ x${remhost} = x ]; then
remhost=prep.ai.mit.edu
# ==> Rewrite to match your favorite ftp site.
fi
echo quit >> ${TMPFILE}
# ==> All commands saved in tempfile.
ftp ${ftpflags} ${remhost} < ${TMPFILE}
# ==> Now, tempfile batch processed by ftp.
Advanced Bash−Scripting Guide
rm −f ${TMPFILE}
# ==> Finally, tempfile deleted (you may wish to copy it to a logfile).
# ==> Exercises:
# ==> −−−−−−−−−
# ==> 1) Add error checking.
# ==> 2) Add bells & whistles.
+
Antek Sawicki contributed the following script, which makes very clever use of the parameter substitution
operators discussed in Section 9.3.
Appendix A. Contributed Scripts 387