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Top Forums Shell Programming and Scripting KSH: Compare variable to $1 in an input file Post 302422846 by right_coaster on Wednesday 19th of May 2010 03:32:02 PM
Old 05-19-2010
KSH: Compare variable to $1 in an input file

Hello,

I am working with KSH on AIX and I have 2 files generated from different sources... as seen below:

Code:
FILE1 FILE2
AAA AAA@ABS0001C
BBB BBB@ABS0003D
CCC CCC@ABS0023A
DDD DDD@ABC0145D
EEE EEE@ABS0090A
FFF FFF@ABS0002A
GGG GGG@ABC0150D
HHH

[note FILE1 is noted above by the 3 characters, FILE2 is everything after the space]

FILE1 is main main data source, created daily and changes quite frequently. FILE2 is static and requires manual update. Each record in FILE1 will match the characters before the @ symbol in FILE2. However, at times, FILE1 may have more records than FILE2 and there will be no match. Rarely, FILE1 will contain less records than FILE2

I need a way to take the value of each line in FILE1 and search for it in FILE2... if found, then I need to print the record from FILE1 with the text after the @ symbol in FILE2. If no match found, I need to print "NULL"

Example output:
Code:
AAA ABS0001C
BBB ABS0003D
CCC ABS0023A
DDD ABC0145D
EEE ABS0090A
FFF ABS0002A
GGG ABC0150D
HHH NULL

I'm able to put the static file within my script in the form of a giant case statement, but that is really not a feasible approach as there are 200+ records in the file. I also think I could do this with a few nasty loops, but I'm really looking for an efficient practical approach. Thanks for any help you can give...

Last edited by Scott; 05-19-2010 at 04:35 PM.. Reason: Code tags please...
 

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TEST(1) 								FSF								   TEST(1)

NAME
test - check file types and compare values SYNOPSIS
test EXPRESSION [ EXPRESSION ] test OPTION DESCRIPTION
Exit with the status determined by EXPRESSION. --help display this help and exit --version output version information and exit EXPRESSION is true or false and sets exit status. It is one of: ( EXPRESSION ) EXPRESSION is true ! EXPRESSION EXPRESSION is false EXPRESSION1 -a EXPRESSION2 both EXPRESSION1 and EXPRESSION2 are true EXPRESSION1 -o EXPRESSION2 either EXPRESSION1 or EXPRESSION2 is true [-n] STRING the length of STRING is nonzero -z STRING the length of STRING is zero STRING1 = STRING2 the strings are equal STRING1 != STRING2 the strings are not equal INTEGER1 -eq INTEGER2 INTEGER1 is equal to INTEGER2 INTEGER1 -ge INTEGER2 INTEGER1 is greater than or equal to INTEGER2 INTEGER1 -gt INTEGER2 INTEGER1 is greater than INTEGER2 INTEGER1 -le INTEGER2 INTEGER1 is less than or equal to INTEGER2 INTEGER1 -lt INTEGER2 INTEGER1 is less than INTEGER2 INTEGER1 -ne INTEGER2 INTEGER1 is not equal to INTEGER2 FILE1 -ef FILE2 FILE1 and FILE2 have the same device and inode numbers FILE1 -nt FILE2 FILE1 is newer (modification date) than FILE2 FILE1 -ot FILE2 FILE1 is older than FILE2 -b FILE FILE exists and is block special -c FILE FILE exists and is character special -d FILE FILE exists and is a directory -e FILE FILE exists -f FILE FILE exists and is a regular file -g FILE FILE exists and is set-group-ID -h FILE FILE exists and is a symbolic link (same as -L) -G FILE FILE exists and is owned by the effective group ID -k FILE FILE exists and has its sticky bit set -L FILE FILE exists and is a symbolic link (same as -h) -O FILE FILE exists and is owned by the effective user ID -p FILE FILE exists and is a named pipe -r FILE FILE exists and is readable -s FILE FILE exists and has a size greater than zero -S FILE FILE exists and is a socket -t [FD] file descriptor FD (stdout by default) is opened on a terminal -u FILE FILE exists and its set-user-ID bit is set -w FILE FILE exists and is writable -x FILE FILE exists and is executable Beware that parentheses need to be escaped (e.g., by backslashes) for shells. INTEGER may also be -l STRING, which evaluates to the length of STRING. AUTHOR
Written by FIXME: ksb and mjb. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for test is maintained as a Texinfo manual. If the info and test programs are properly installed at your site, the command info test should give you access to the complete manual. GNU coreutils 4.5.3 February 2003 TEST(1)
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