Sponsored Content
Top Forums UNIX for Beginners Questions & Answers Performance issue to read line by line Post 302972463 by Don Cragun on Thursday 5th of May 2016 04:03:01 PM
Old 05-05-2016
Quote:
Originally Posted by RudiC
Would this come close to what you need?
Code:
awk '
                {RT = substr ($1, 1, 4)}

RT == 1111      {a1 = 100; a2 = a3 = a4 = a5 = a6 = a7 = a8 = a9 = 0}
RT == 1112      {a2++   ; a3 += 2}
RT == 1113      {a5 += 3; a7++}
RT == 1114      {a4 += 3; a6 += 4}
RT == 1115      {a7++   ; a9 += 3}
RT == 1116      {a5++   ; a8 ++}
RT == 2221      {a6 = a7 = a8 = a9 = 0}
RT == 2222      {a3++   ; a7 += 3}
RT == 3333      {a8++   ; a9 += 5}
RT == 5555      {a1++   ; a2 += 3; a3++; a4++}

                {print NR  a1 a2 a3 a4 a5 a6 a7 a8 a9 $0}
' /tmp/test2.txt

That is close to what I came up with, but you'll need to use printf with a format string producing fixed-width, leading-zero-filled formats for the NR and a1 through a9 fields instead of just using print. (awk doesn't have the ksh typeset flags to set output formats for values assigned to variables.)
This User Gave Thanks to Don Cragun For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

bash: read file line by line (lines have '\0') - not full line has read???

I am using the while-loop to read a file. The file has lines with null-terminated strings (words, actually.) What I have by that reading - just a first word up to '\0'! I need to have whole string up to 'new line' - (LF, 10#10, 16#A) What I am doing wrong? #make file 'grb' with... (6 Replies)
Discussion started by: alex_5161
6 Replies

2. Shell Programming and Scripting

While loop read line Issue

Hi I am using while loop, below, to read lines from a very large file, around 400,000 rows. The script works fine until around line 300k but then starts giving incorrect result. I have tried running the script with a smaller data set and it works fine. I made sure to include the line where... (2 Replies)
Discussion started by: saurabhkumar198
2 Replies

3. Shell Programming and Scripting

Multi Line 'While Read' command issue when using sh -c

Hi, I'm trying to run the following command using sh -c ie sh -c "while read EachLine do rm -f $EachLine ; done < file_list.lst;" It doesn't seem to do anything. When I run this at the command line, it does remove the files contained in the list so i know the command works ie... (4 Replies)
Discussion started by: chrispward
4 Replies

4. Shell Programming and Scripting

while read LINE issue

Hi, This is the script and the error I am receiving Can anyone please suggest ? For the exmaple below assume we are using vg01 #!/bin/ksh echo "##### Max Mount Count Fixer #####" echo "Please insert Volume Group name to check" read VG lvs |grep $VG | awk {'print $1'} > /tmp/audit.log ... (2 Replies)
Discussion started by: galuzan
2 Replies

5. Shell Programming and Scripting

how to read the contents of two files line by line and compare the line by line?

Hi All, I'm trying to figure out which are the trusted-ips and which are not using a script file.. I have a file named 'ip-list.txt' which contains some ip addresses and another file named 'trusted-ip-list.txt' which also contains some ip addresses. I want to read a line from... (4 Replies)
Discussion started by: mjavalkar
4 Replies

6. Shell Programming and Scripting

Need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line...

Hello, I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be: SRVXPAPI001 ERRO JUN24 07:28:34 1775 REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F ... (8 Replies)
Discussion started by: Ferocci
8 Replies

7. Shell Programming and Scripting

How to read file line by line and compare subset of 1st line with 2nd?

Hi all, I have a log file say Test.log that gets updated continuously and it has data in pipe separated format. A sample log file would look like: <date1>|<data1>|<url1>|<result1> <date2>|<data2>|<url2>|<result2> <date3>|<data3>|<url3>|<result3> <date4>|<data4>|<url4>|<result4> What I... (3 Replies)
Discussion started by: pat_pramod
3 Replies

8. Shell Programming and Scripting

Read line, issue with leading - and {}'s

Heyas With my forum search term 'issue with leading dash' i found 2 closed threads which sadly didnt help me. Also me was to eager to add the script, that i didnt properly test, and just now figured this issue. So i have this code: if ] then while read line do line="${line/-/'\-'}"... (7 Replies)
Discussion started by: sea
7 Replies

9. Shell Programming and Scripting

[BASH] read 'line' issue with leading tabs and virtual line breaks

Heyas I'm trying to read/display a file its content and put borders around it (tui-cat / tui-cat -t(ypwriter). The typewriter-part is a 'bonus' but still has its own flaws, but thats for later. So in some way, i'm trying to rewrite cat using bash and other commands. But sadly it fails on... (2 Replies)
Discussion started by: sea
2 Replies

10. Shell Programming and Scripting

Performance issue - to read line by line

All- We have a performance issue in reading a file line by line. Please find attached scripts for the same. Currently it is taking some 45 min to parse "512444" lines. Could you please have a look at it and provide any suggestions to improve the performance. Thanks, Balu ... (12 Replies)
Discussion started by: balu1729
12 Replies
typeset(1)							   User Commands							typeset(1)

NAME
typeset, whence - shell built-in functions to set/get attributes and values for shell variables and functions SYNOPSIS
typeset [ +- HLRZfilrtux [n]] [ name [ = value]]... whence [-pv] name... DESCRIPTION
typeset sets attributes and values for shell variables and functions. When typeset is invoked inside a function, a new instance of the variables name is created. The variables value and type are restored when the function completes. The following list of attributes may be specified: -H This flag provides UNIX to host-name file mapping on non-UNIX machines. -L Left justify and remove leading blanks from value. If n is non-zero it defines the width of the field; otherwise, it is determined by the width of the value of first assignment. When the variable is assigned to, it is filled on the right with blanks or trun- cated, if necessary, to fit into the field. Leading zeros are removed if the -Z flag is also set. The -R flag is turned off. -R Right justify and fill with leading blanks. If n is non-zero it defines the width of the field, otherwise it is determined by the width of the value of first assignment. The field is left filled with blanks or truncated from the end if the variable is reas- signed. The -L flag is turned off. -Z Right justify and fill with leading zeros if the first non-blank character is a digit and the -L flag has not been set. If n is non-zero it defines the width of the field; otherwise, it is determined by the width of the value of first assignment. -f The names refer to function names rather than variable names. No assignments can be made and the only other valid flags are -t, -u and -x. The flag -t turns on execution tracing for this function. The flag -u causes this function to be marked undefined. The FPATH variable will be searched to find the function definition when the function is referenced. The flag -x allows the func- tion definition to remain in effect across shell procedures invoked by name. -i Parameter is an integer. This makes arithmetic faster. If n is non-zero it defines the output arithmetic base; otherwise, the first assignment determines the output base. -l All upper-case characters are converted to lower-case. The upper-case flag, -u is turned off. -r The given names are marked readonly and these names cannot be changed by subsequent assignment. -t Tags the variables. Tags are user definable and have no special meaning to the shell. -u All lower-case characters are converted to upper-case characters. The lower-case flag, -l is turned off. -x The given names are marked for automatic export to the environment of subsequently-executed commands. The -i attribute can not be specified along with -R, -L, -Z, or -f. Using + rather than - causes these flags to be turned off. If no name arguments are given but flags are specified, a list of names (and optionally the values) of the variables which have these flags set is printed. (Using + rather than - keeps the values from being printed.) If no names and flags are given, the names and attributes of all variables are printed. For each name, whence indicates how it would be interpreted if used as a command name. The -v flag produces a more verbose report. The -p flag does a path search for name even if name is an alias, a function, or a reserved word. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), set(1), sh(1), attributes(5) SunOS 5.10 1 Feb 1995 typeset(1)
All times are GMT -4. The time now is 11:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy