Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: "Print" not working in script
Top Forums Shell Programming and Scripting "Print" not working in script Post 302333564 by TeamUSA on Monday 13th of July 2009 11:34:56 AM
Old 07-13-2009
"Print" not working in script
Hello everybody,

I've gotten a script together that is designed to open a .bin file and read it 32 bits at a time and then add it to the checksum. However, the only issue that I have is that it will not print anything at the end. Can anyone help me? Also, is the & symbol used for restraining the read to 32 bits? Thanks for your help in advanced.

Code:
sub cksum{
 my $word_count;
 my $bias=0;
 my $checksum=0;
 my $srcfile="../file.bin"; 
 my $buffer;
 
 open INF, $srcfile
    or die "\nCan't open $srcfile for reading: $!\n";
 print "Cannot open file.\n";
 binmode INF;
   
  $checksum = $bias;
  #while ($word_count>=0)
  while (
  read (INF, $buffer, 32) # read in (up to) 64k chunks, write
  #and print OUTF $buffer # exit if read or write fails
  ) 
  {$checksum = $checksum + $buffer}; #adding goes here
  $checksum = $checksum & 0xFFFFFFFF;
  print "This is the checksum: $checksum";
  }

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

2. Shell Programming and Scripting

Script not working..."sort" not working properly....

Hello all, I have a file - 12.txt cat 12.txt =============================================== Number of executions = 2 Total execution time (sec.ms) = 0.009883 Number of executions = 8 Total execution time (sec.ms) = 0.001270 Number of... (23 Replies)
Discussion started by: Rahulpict
23 Replies

3. Shell Programming and Scripting

cat $como_file | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g'

hi All, cat file_name | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g' Can this be done by using sed or awk alone (4 Replies)
Discussion started by: harshakusam
4 Replies

4. Solaris

How to check "faulty" or "stalled" print queues - SAP systems?

Hi all, First off, sorry for a long post but I think I have no other option if I need to explain properly what I need help for. I need some advise on how best to check for "faulty" or "stalled/jammed' print queues. At the moment, I have three (3) application servers which also acts as print... (0 Replies)
Discussion started by: newbie_01
0 Replies

5. Shell Programming and Scripting

print system("uname -n") is not working .Pls help

awk '{if ($1 == "State:" && $2 == "Okay") {print system("uname -n")}}' ---------- Post updated at 01:20 AM ---------- Previous update was at 01:19 AM ---------- it is printing uname -n instead of printing the output of the command (8 Replies)
Discussion started by: rishiraaz
8 Replies

6. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

7. Shell Programming and Scripting

"if" Loop not working when executing script using cron

I am facing this weird issue where the script is working fine from the command line but when I am executing it from cron though it is working fine but the "if" loop is processing else part though I know that the if part of the logic is true and ideally the loop should execute the if portion. ... (3 Replies)
Discussion started by: sk2code
3 Replies

8. UNIX for Beginners Questions & Answers

Automate "touch" bash script not working.

#!/bin/bash -i SAVEIFS=$IFS IFS=$"\n\b" picc=$* if ; then echo $TDATE if ; then touch dummy touch -t "tdate" dummy touch -r "dummy" "$picc" else echo -e "No mod date value to apply. If there is one in your shell,\ninvoke \eStarted asking advice on this (on Linuxquestions.org).... (9 Replies)
Discussion started by: iamwrong
9 Replies

9. Shell Programming and Scripting

Why awk print is strange when I set FS = " " instead of FS = "\t"?

Look at the following data file（cou.data） which has four fields separated by tab. Four fields are country name, land area, population, continent where it belongs. As for country name or continent name which has two words, two words are separated by space. (Data are not accurately... (1 Reply)
Discussion started by: chihuyu
1 Replies

10. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies

LEARN ABOUT MOJAVE

sum

sum(n)							     Cyclic Redundancy Checks							    sum(n)

__________________________________________________________________________________________________________________________________________________

NAME

       sum - Calculate a sum(1) compatible checksum

SYNOPSIS

       package require Tcl  8.2

       package require sum  ?1.1.0?

       ::crc::sum ?-bsd | -sysv? ?-format fmt? ?-chunksize size? [ -filename file | -channel chan | string ]

_________________________________________________________________

DESCRIPTION

       This  package  provides	a Tcl-only implementation of the sum(1) command which calculates a 16 bit checksum value from the input data.  The
       BSD sum algorithm is used by default but the SysV algorithm is also available.

COMMANDS

       ::crc::sum ?-bsd | -sysv? ?-format fmt? ?-chunksize size? [ -filename file | -channel chan | string ]
	      The command takes string data or a file name or a channel and returns a checksum value calculated using the  sum(1)  algorithm.  The
	      result is formatted using the format(n) specifier provided or as an unsigned integer (%u) by default.

OPTIONS

       -sysv  The SysV algorithm is fairly naive. The byte values are summed and any overflow is discarded. The lowest 16 bits are returned as the
	      checksum.  Input with the same content but different ordering will give the same result.

       -bsd   This algorithm is similar to the SysV version but includes a bit rotation step which provides a dependency on the order of the  data
	      values.

       -filename name
	      Return a checksum for the file contents instead of for parameter data.

       -channel chan
	      Return  a  checksum  for	the  contents  of the specified channel. The channel must be open for reading and should be configured for
	      binary translation. The channel will no be closed on completion.

       -chunksize size
	      Set the block size used when reading data from either files or channels. This value defaults to 4096.

       -format string
	      Return the checksum using an alternative format template.

EXAMPLES

       % crc::sum "Hello, World!"
       37287

       % crc::sum -format 0x%X "Hello, World!"
       0x91A7

       % crc::sum -file sum.tcl
       13392

AUTHORS

       Pat Thoyts

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category  crc	of
       the  Tcllib  SF	Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

SEE ALSO

       cksum(n), crc32(n), sum(1)

KEYWORDS

       checksum, cksum, crc, crc32, cyclic redundancy check, data integrity, security, sum

CATEGORY

       Hashes, checksums, and encryption

COPYRIGHT

       Copyright (c) 2002, Pat Thoyts <patthoyts@users.sourceforge.net>

crc								       1.1.0								    sum(n)
All times are GMT -4. The time now is 01:03 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy