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Full Discussion: Reading input files
Top Forums Shell Programming and Scripting Reading input files Post 302276829 by pdxwarrior on Wednesday 14th of January 2009 05:21:12 PM
Old 01-14-2009
Reading input files
Okay, so I've looked on here and found some similar things, but not exactly what I am looking for. I am working on creating a script that can back up some files, based on the contents of another file - the configuration file.

First file contains the files to back up - we'll call this backup.conf:

(Format of file: SERVICE:/path/to/file:destination)

ETC:/etc/hosts:./etc
ETC:/etc/netmasks:./etc
DHCP:/etc/default/dhcp:./etc

The next file is the backup script. It contains an "awk" statement to break down the backup.conf file so that it only needs to gather specific parts, based on what needs to be backed up. We'll call this backup:

#awk statement - creates temporary file with targets and destinations
sed '/^ *#/d;s/#.*//' backup.conf | grep -v ^$ | grep ETC | awk -F: '{print $2" "$3}' >! /tmp/backupfiles

#while loop to process output
while read line
do
if [ -f $line ]
then
/usr/bin/cp $line $target
fi
done < /tmp/backupfiles

I realize that $target is not set here. This is the problem that I am running into, and this is just to give you an idea of what I am attempting to do. Basically, the while statement needs to be able to take each line from /tmp/backupfiles and as it reads it, break it down into two variables, the file to back backed up ($line) and the location to back it up to ($target). Using $line is can also verify that the file exists and is available before trying to back it up.

Any suggestions? I am using "ksh" for this on Solaris systems.
 

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LEARN ABOUT MINIX

backup

BACKUP(8)						      System Manager's Manual							 BACKUP(8)

NAME

       backup - backup files

SYNOPSIS

       backup [-djmnorstvz] dir1 dir2

OPTIONS

       -d     At top level, only directories are backed up

       -j     Do not copy junk:  *.Z, *.bak, a.out, core, etc

       -m     If device full, prompt for new diskette

       -n     Do not backup top-level directories

       -o     Do not copy *.o files

       -r     Restore files

       -s     Do not copy *.s files

       -t     Preserve creation times

       -v     Verbose; list files being backed up

       -z     Compress the files on the backup medium

EXAMPLES

       backup -mz . /f0    # Backup current directory compressed

       backup /bin /usr/bin
			   # Backup bin from RAM disk to hard disk

DESCRIPTION

       Backup (recursively) backs up the contents of a given directory and its subdirectories to another part of the file system.  It has two typ-
       ical uses.  First, some portion of the file system can be backed up onto 1 or more diskettes.  When  a  diskette  fills	up,  the  user	is
       prompted for a new one.	The backups are in the form of mountable file systems.	Second, a directory on RAM disk can be backed up onto hard
       disk.  If the target directory is empty, the entire source directory is copied there, optionally compressed to save space.  If  the  target
       directory  is  an  old  backup,	only  those  files  in	the target directory that are older than similar names in the source directory are
       replaced.  Backup uses times for this purpose, like make.  Calling Backup as Restore is equivalent to using the -r  option;  this  replaces
       newer files in the target directory with older files from the source directory, uncompressing them if necessary.  The target directory con-
       tents are thus returned to some previous state.

SEE ALSO

       tar(1).

																	 BACKUP(8)
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