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<TITLE>BASH Programming - Introduction HOWTO: Altri Script</TITLE>
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<H2><A NAME="s12">12. Altri Script</A> </H2>
<H2><A NAME="ss12.1">12.1 Applicare un comando a tutti i file in una directory. </A>
</H2>
<P>
<H2><A NAME="ss12.2">12.2 Esempio: Uno script di backup molto semplice (ancora un poco migliore)</A>
</H2>
<P>
<BLOCKQUOTE><CODE>
<PRE>
#!/bin/bash
SRCD="/home/"
TGTD="/var/backups/"
OF=home-$(date +%Y%m%d).tgz
tar -cZf $TGTD$OF $SRCD
</PRE>
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<H2><A NAME="ss12.3">12.3 Rinominatore di file</A>
</H2>
<P>
<BLOCKQUOTE><CODE>
<PRE>
#!/bin/sh
# renna: rename multiple files according to several rules
# written by felix hudson Jan - 2000
#first check for the various 'modes' that this program has
#if the first ($1) condition matches then we execute that portion of the
#program and then exit
# check for the prefix condition
if [ $1 = p ]; then
#we now get rid of the mode ($1) variable and prefix ($2)
prefix=$2 ; shift ; shift
# a quick check to see if any files were given
# if none then its better not to do anything than rename some non-existent
# files!!
if [$1 = ]; then
echo "no files given"
exit 0
fi
# this for loop iterates through all of the files that we gave the program
# it does one rename per file given
for file in $*
do
mv ${file} $prefix$file
done
#we now exit the program
exit 0
fi
# check for a suffix rename
# the rest of this part is virtually identical to the previous section
# please see those notes
if [ $1 = s ]; then
suffix=$2 ; shift ; shift
if [$1 = ]; then
echo "no files given"
exit 0
fi
for file in $*
do
mv ${file} $file$suffix
done
exit 0
fi
# check for the replacement rename
if [ $1 = r ]; then
shift
# i included this bit as to not damage any files if the user does not specify
# anything to be done
# just a safety measure
if [ $# -lt 3 ] ; then
echo "usage: renna r [expression] [replacement] files... "
exit 0
fi
# remove other information
OLD=$1 ; NEW=$2 ; shift ; shift
# this for loop iterates through all of the files that we give the program
# it does one rename per file given using the program 'sed'
# this is a sinple command line program that parses standard input and
# replaces a set expression with a give string
# here we pass it the file name ( as standard input) and replace the nessesary
# text
for file in $*
do
new=`echo ${file} | sed s/${OLD}/${NEW}/g`
mv ${file} $new
done
exit 0
fi
# if we have reached here then nothing proper was passed to the program
# so we tell the user how to use it
echo "usage;"
echo " renna p [prefix] files.."
echo " renna s [suffix] files.."
echo " renna r [expression] [replacement] files.."
exit 0
# done!
</PRE>
</CODE></BLOCKQUOTE>
<H2><A NAME="ss12.4">12.4 Rinominatore di file (semplice)</A>
</H2>
<P>
<BLOCKQUOTE><CODE>
<PRE>
#!/bin/bash
# renames.sh
# basic file renamer
criteria=$1
re_match=$2
replace=$3
for i in $( ls *$criteria* );
do
src=$i
tgt=$(echo $i | sed -e "s/$re_match/$replace/")
mv $src $tgt
done
</PRE>
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