Useful SysAdmin Scripts: Search-and-Replace
Submitted by Igor on June 1, 2008 – 3:03 pmNo Comment
Let’s say you moved your server to a new network and now it has a different IP address. You know your users have a habit of hard-coding the server’s IP into their scripts. So you want to scan a bunch of directories and replace the old IP with the new one in all text files. The script below will do just that. It allows you to specify search path, filename pattern, search pattern, and replacement pattern. The script will also create backups of all files it modifies.
Download: find_replace.sh ; or find_replace.ksh
#!/bin/sh #--------------------------------------------- # FUNCTIONS #--------------------------------------------- enter_dir_func() { SDIR= CDIR=`pwd` echo "" echo -n "Enter directory to search [$CDIR]: " read SDIR if [ ! -n "$SDIR" ] then SDIR=$CDIR else if [ ! -d $SDIR ] then echo "Directory $SDIR does not exist!" echo 1 fi fi } #--------------------------------------------- enter_find_string_func() { FINDSTR= echo -n "Enter search string: " read FINDSTR if [ ! -n "$FINDSTR" ] then echo "Search string cannot be null!" exit 1 fi } #--------------------------------------------- enter_replace_string_func() { REPLSTR= echo -n "Enter replace string: " read REPLSTR } #--------------------------------------------- enter_filename_string_func() { FILESTR= echo -n "Enter filename string: " read FILESTR } #--------------------------------------------- search_replace_func() { echo "Performing find-and-replace..." DATE=`date +'%Y%m%d%H%M%S'` find $SDIR -type f -name "*${FILESTR}*" | while read FILENAME do if [ `file "$FILENAME" | awk '{print $NF}'` == "text" ] then if [ `grep -c "$FINDSTR" "$FILENAME"` -gt 0 ] then echo "-----------------------------------------------" echo "Replacing in $FILENAME" cp -p "$FILENAME" "${FILENAME}_${DATE}_BACKUP" gzip "${FILENAME}_${DATE}_BACKUP" sed "s+${FINDSTR}+${REPLSTR}+g" "$FILENAME" > "${FILENAME}_${DATE}" mv -f "${FILENAME}_${DATE}" "$FILENAME" echo "Backup file saved as ${FILENAME}_${DATE}.gz" fi fi done } #--------------------------------------------- confirm_func() { clear RESP= echo "Will search $SDIR for filenames mathing '*${FILESTR}*' pattern." echo "And will replace all occurences of '${FINDSTR}' with '${REPLSTR}'." echo -n "Do you wish to continue? (y/n): " read RESP case $RESP in [yY] | [yY][eE][sS] ) search_replace_func ;; * ) exit 0 esac } #--------------------------------------------- # RUNTIME #--------------------------------------------- enter_dir_func enter_filename_string_func enter_find_string_func enter_replace_string_func confirm_func
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