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Homework and Emergencies Emergency UNIX and Linux Support Logic for file copy operation Post 302468221 by raghu_shekar on Tuesday 2nd of November 2010 05:40:35 AM
Old 11-02-2010
Logic for file copy operation

Hi,
i need to copy contents from source to destination with a few conditions, Please helpme out.
Sample input file
Code:
$>cat testfile.txt
/a/b/c/d | /e/f/g/d

(d can be either a file or directory)
my conditions are:
check if destination is valid and if its a file or directory
if its a directory(i.e source is a new file and does not already exist), copy the source(file) to destination
if its a file(there s a file with the same name as source file), take backup and copy the source(file) to destination
if not both, print error msg
Here is what i have tried:
Code:
 
#!/bin/ksh
src=`cat testfile.txt |awk -F\| '{print $1}' testfile.txt`
dst=`cat testfile.txt |awk -F\| '{print $2}' testfile.txt`
#collect all invalid, or check if source and destination are valid:
if [[ ! -f $src ]];then
      echo "Source does not exist"
      exit 0
fi
if [[ ! -d $dst && -f $dst ]];then
      echo "taking backup of existing $dst and copying new file from $src"
      mv $dst $dst.BAK
      cp $src $dst
elif [[ -d $dst && ! -f $dst ]];then
      echo "copying $src to $dst"
      cp $src $dst
else
      echo "Destination directory does not exist. Please check..."
      exit 0
fi

But this doesnt seem to be working. Please help

Moderator's Comments:
Mod Comment Using code tags is good, indention even better Smilie

Last edited by zaxxon; 11-02-2010 at 07:03 AM..
 

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mlib_ImageDilate4(3MLIB)				    mediaLib Library Functions					  mlib_ImageDilate4(3MLIB)

NAME
mlib_ImageDilate4 - four neighbor dilate SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageDilate4(mlib_image *dst, const mlib_image *src); DESCRIPTION
The mlib_ImageDilate4() function performs a dilation operation on an image by using each pixel's four orthogonal neighbors. The source and destination images must be single-channel images. The data type can be MLIB_BIT, MLIB_BYTE, MLIB_SHORT, MLIB_USHORT, or MLIB_INT. For 4-neighbor binary images, it uses the following equation: dst[x][y][0] = OR{ src[x][y][0], src[x-1][y][0], src[x+1][y][0], src[x][y-1][0], src[x][y+1][0] } For 4-neighbor grayscale images, it uses the following equation: dst[x][y][0] = MAX{ src[x][y][0], src[x-1][y][0], src[x+1][y][0], src[x][y-1][0], src[x][y+1][0] } where x = 1, ..., w-2; y = 1, ..., h-2. PARAMETERS
The function takes the following arguments: dst Pointer to destination image src Pointer to source image. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageDilate4_Fp(3MLIB), mlib_ImageDilate8(3MLIB), mlib_ImageDilate8_Fp(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageDilate4(3MLIB)
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