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Top Forums Shell Programming and Scripting Need quick help with diff files in current directory!!! Post 30712 by tkwai on Friday 25th of October 2002 02:23:24 PM
Old 10-25-2002
Need quick help with diff files in current directory!!!

i have a problem that needs to be solved with CSH , SED or AWK as soon as possible.

I need to write a program which creates a directory called backup (if it does not exist). The program then compares all the ordinary files in the current directory and if two files are identical, it moves one of them to the backup directory. The program should finally display the names of the files moved or the message: “No duplicate files found” if no two files are identical.

i have been trying out with the diff and cmp command. but i am not able to write a script to compare all the files in the current directory. can anyone help me out here?
 

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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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