could someone explain this code Post: 51757

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

explain the code

Hi , Can anyone explains what does the below highlighted statements means: # Set environment variables . ${0%/*}/wrkenv.sh jobName_sh=${0##*/} jobName=${jobName_sh%.*} Thanks, Sri

2. Shell Programming and Scripting

Can any one explain what this code will do

ccc_con,CCC_CON,0 Above is the input for this code #!/usr/bin/bash my_path=`dirname $0` T_table=$1 S_table=$2 P_table=$3 #Star new code while read ${my_path}/arch_table_list.txt { awk -F "," '{print $1}' ${my_path}/arch_table_list.txt ${S_table} awk -F "," '{print...

3. Shell Programming and Scripting

can any one explain the meaning of the below code ?

while getopts :g:l:h: KEY $* do case $KEY in g) NAME=$OPTARG ;; l) LAB=$OPTARG ;; h) HD=$OPTARG ;; *) echo "Illegal option: $OPTARG" echo "$usage" exitStatus=1 exitGrace esac done

4. Programming

Explain a block of code:

Hi, I have this block in a code and I need to know it's meaning: bool selectEvents = config.get("selectEvents",false); if (selectEvents) { ifstream in("events"); while (in) { int run, evt; in >> run >> evt; if (in.eof()) break; ...

5. Shell Programming and Scripting

Explain SED code

Hi, Can anyone pls explain me the below SED code in detail. sed -e :a -e '$!N;s/\n//;ta' -e P -e D When this code is executed with a file(has 1lac records), it is taking very long time to process. So I wanted to modify this SED code with equivalant AWK code. Thanks, Sri

6. Shell Programming and Scripting

Can someone explain the 2 lines of code?

I have something like in the script. Can anyone explain what does the sort command does and followed by the sed sort -r -k3.7,3 -k3.1,3 -k3.4,3 -t: $dir"abc_"$x"_parsed" | sed -e 's/$\{3\}$/\1,\2/2' -e 's/\/2,00/\/200/' The file abc_"$x"_parsed contains something like below ...

7. Shell Programming and Scripting

Please explain what this code is doing

Hi, Pls explain me what the below code is doing. specially meaning if -a while calling test function- case $1 in 1) beg_dt=01; end_dt=07 ;; 2) beg_dt=08; end_dt=14 ;; 3) beg_dt=15; end_dt=21 ;; 4) beg_dt=22; end_dt=28 ;; 5) beg_dt=29; end_dt=31 ;; esac test \( `date +%w` -eq $2 -a...

8. Shell Programming and Scripting

Explain this shell script code.

Hi i am new to shell script can any one please explain me the code below which is written for execution of python scripts which are located in same folder. please explain the code line by line ls *.py > xx while do read myline || break python $myline done<xx Thanks Mukthyar....

9. Shell Programming and Scripting

Please explain what this Awk code is doing

Hi Guys, Please help me, I am new to programming and I don’t understand what some parts of this code are doing. I have comments on the parts I know, please help if my understanding of the code is not correct and also help with parts with questions. awk ' { gsub( ">",...

10. Shell Programming and Scripting

can you explain this sed code?

can anyone please explain this code? sed ':a;N;$!ba;s/]\n//g' file it replaces lines ending with "]" and concatenates with the next line so that line1] line2 becomes line1line2 i don't understand this part: :a;N;$!ba; I have noted that I can replace "a" with any letter: ...

LEARN ABOUT PLAN9

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)