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Full Discussion: Empty file check
Top Forums Shell Programming and Scripting Empty file check Post 302890390 by Akshay Hegde on Wednesday 26th of February 2014 02:05:19 PM
Old 02-26-2014
This might help you

Code:
$ touch test1
$ cat test1
$ touch test2
$ echo 'I am not empty' >test2
$ cat test2
I am not empty

Code:
#!/bin/bash



empty(){
	for file in $(echo "$*"); do 
		[ -s  "$file"  ] || return 1
	done
}

# Call function with one empty and non empty file
empty test1 test2

if [ "$?" -eq "0" ]; then
	echo "all fine"
else
        echo "something went wrong"
fi 

# Call function with non empty files
empty test2 test2

if [ "$?" -eq "0" ]; then
	echo "all fine"
else
	echo "something went wrong"
fi

Code:
$ bash test
something went wrong
all fine

---------- Post updated at 01:35 AM ---------- Previous update was at 01:30 AM ----------

what I wanted to suggest you that create function like above according to your need and play with exit code it's easy.
 

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LEARN ABOUT DEBIAN

bup-restore

bup-restore(1)						      General Commands Manual						    bup-restore(1)

NAME

       bup-restore - extract files from a backup set

SYNOPSIS

       bup restore [--outdir=outdir] [-v] [-q]

DESCRIPTION

       bup restore extracts files from a backup set (created with bup-save(1)) to the local filesystem.

       The specified paths are of the form /branch/revision/path/to/file.  The components of the path are as follows:

       branch the name of the backup set to restore from; this corresponds to the --name (-n) option to bup save.

       revision
	      the  revision of the backup set to restore.  The revision latest is always the most recent backup on the given branch.  You can dis-
	      cover other revisions using bup ls /branch.

       /path/to/file
	      the original absolute filesystem path to the file you want to restore.  For example, /etc/passwd.

       Note: if the /path/to/file is a directory, bup restore will restore that directory as well as recursively restoring all its contents.

       If /path/to/file is a directory ending in a slash (ie.  /path/to/dir/), bup restore will restore the children of that directory directly to
       the  current directory (or the --outdir).  If the directory does not end in a slash, the children will be restored to a subdirectory of the
       current directory.  See the EXAMPLES section to see how this works.

OPTIONS

       -C, --outdir=outdir
	      create and change to directory outdir before extracting the files.

       -v, --verbose
	      increase log output.  Given once, prints every directory as it is restored; given twice, prints every file and directory.

       -q, --quiet
	      don't show the progress meter.  Normally, is stderr is a tty, a progress display is printed that shows the  total  number  of  files
	      restored.

EXAMPLE

       Create a simple test backup set:

	      $ bup index -u /etc
	      $ bup save -n mybackup /etc/passwd /etc/profile

       Restore just one file:

	      $ bup restore /mybackup/latest/etc/passwd
	      Restoring: 1, done.

	      $ ls -l passwd
	      -rw-r--r-- 1 apenwarr apenwarr 1478 2010-09-08 03:06 passwd

       Restore the whole directory (no trailing slash):

	      $ bup restore -C test1 /mybackup/latest/etc
	      Restoring: 3, done.

	      $ find test1
	      test1
	      test1/etc
	      test1/etc/passwd
	      test1/etc/profile

       Restore the whole directory (trailing slash):

	      $ bup restore -C test2 /mybackup/latest/etc/
	      Restoring: 2, done.

	      $ find test2
	      test2
	      test2/passwd
	      test2/profile

SEE ALSO

       bup-save(1), bup-ftp(1), bup-fuse(1), bup-web(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															    bup-restore(1)
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