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Top Forums Shell Programming and Scripting concatenate files sorted by date Post 302203247 by docaia on Saturday 7th of June 2008 10:32:25 AM
Old 06-07-2008
concatenate files sorted by date

I am a beginner in script writing, i tried to do the following
I have a set of files sorted by date in the format YYMMDD.s and .x and .r
I need to concatenate a header file to these sets of files so I used the following code
Code:
echo "enter Swath number"
read s
echo "please enter first date and MMDD press ENTER"
read i
echo "please enter last date and MMDD  press ENTER"
read j
for((i; i <= j; i++))
do
cat NJSC_Alam_Ph1_Blk1_3D_HDR_S /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}.s  > /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}_Final.s

cat NJSC_Alam_Ph1_Blk1_3D_HDR_R /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}.r  > /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}_Final.r

cat NJSC_Alam_Ph1_Blk1_3D_HDR_X /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}.x  > /ud/SPECSDATA/Final_SPS/Alam3D/Swath_${s}/08${i}_Final.x

done

I expect it to concatenate the files based on the user input.
I have 2 problems, the first on is that it doesn't do this for example if I enter the value for i and j to be 0530 and 0531 for 30 and 31 of May it searches for a file named 08345 instead of 080530.
the other problem is how can i make the script to work for 2 different months? like I have the first file as 300508 and last file as 050608, the loop is not going o work there
 

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line(1) 						      General Commands Manual							   line(1)

NAME
line - Reads one line from standard input SYNOPSIS
line STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: line: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None DESCRIPTION
The line command copies one line, up to and including a newline, from standard input and writes it to standard output. Use this command within a shell command file to read from your terminal. The line command always writes at least a newline character. NOTES
The line utility has no internationalization features and is marked LEGACY in XCU Issue 5. Use the read utility instead. EXIT STATUS
Success. End-of-File. EXAMPLES
To read a line from the keyboard and append it to a file, enter: echo 'Enter comments for the log:' echo ': c' line >>log This shell procedure displays the message: Enter comments for the log: It then reads a line of text from the keyboard and adds it to the end of the file log. The echo ': c' command displays a : (colon) prompt. See the echo command for information about the c escape sequence. SEE ALSO
Commands: echo(1), ksh(1), read(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: read(2) Standards: standards(5) line(1)
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