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Full Discussion: Why the results of these two code fragments are not the same?
Top Forums Shell Programming and Scripting Why the results of these two code fragments are not the same? Post 303030162 by johnprogrammer on Wednesday 6th of February 2019 08:41:52 PM
Old 02-06-2019
Why the results of these two POSIX shell code fragments, are not the same?
Code 1:

Code:
#!/bin/sh

for arg1 in "$@"
do
    counter=0

   for arg2 in "$@"
   do

     if [ "$arg2" = "$arg1" ] && [ $counter -eq 0 ]
     then
       counter=$((counter+1))

       continue 
    fi


   if [ "$arg2" = "$arg1" ]
   then
    
     echo
     echo "Error: Two or more arguments are the same."
     echo
     echo "Exiting..."
     echo

     exit 1
    fi

  done

done

exit 0

It outputs:
Code:
[john@manjaromatepc Downloads]$ ./script.sh ~/Documents/ ~/Downloads/
[john@manjaromatepc Downloads]$

Code 2:

Code:
#!/bin/sh


for arg1 in "$@"
do
  
  counter=0

  for arg2 in "$@"
  do


    if [ $counter -eq 0 ]
    then
  
      counter=$((counter+1))

      continue 
   fi


  if [ "$arg2" = "$arg1" ]
  then
    
    echo
    echo "Error: Two or more arguments are the same."
    echo
    echo "Exiting..."
    echo

    exit 1
  fi

 done

done

exit 0

It outpouts:

Code:
 
[john@manjaromatepc Downloads]$ ./script.sh ~/Documents/ ~/Downloads/

Error: Two or more arguments are the same.

Exiting...

[john@manjaromatepc Downloads]$

Last edited by johnprogrammer; 02-06-2019 at 10:49 PM.. Reason: The second code fragment has a logical mistake
 

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LEARN ABOUT DEBIAN

fssync-debug_stats

FSSYNC-DEBUG_STATS(8)					       AFS Command Reference					     FSSYNC-DEBUG_STATS(8)

NAME

       fssync-debug_stats - Displays various statistics

SYNOPSIS

       fssync-debug stats -cmd <subcommand>
	   [-arg1 <arg1>]
	   [-arg2 <arg2>]
	   [-reason <sync protocol reason code>]
	   [-programtype <program type code>]
	   [-help]

       fssync-debug s -c <subcommand>
	   [-arg1 <arg1>]
	   [-arg2 <arg2>]
	   [-r <sync protocol reason code>]
	   [-p <program type code>]
	   [-h]

DESCRIPTION

       The fssync-debug stats command displays statistics according to the value of the option -cmd.

OPTIONS

       -cmd <subcommand>
	   Specifies statistics subcommand. Available subcommands are:

	   o   pkg    -- general volume package statistics

	   o   vicep  -- vice partition statistics

	   o   hash   -- volume hash chain statistics

	   o   hdr    -- volume header cache statistics

	   o   vlru   -- vlru generation statistics

	   o   help   -- display list of available subcommands

       -arg1 <arg1>
	   Specifies first optional argument, in the context of the chosen subcommand. For vicep statistics, it specifies partition name; for hash
	   statistics, it specifies hash bucket number; for vlru statistics it specifies vlru generation number.

       -arg2 <arg2>
	   Specifies second optional argument, in the context of the chose subcommand. Currently, none of the subcommands use it.

       -reason <sync protocol reason code>
	   Specifies numeric sync protocol reason code.  Available codes are listed in OpenAFS source file src/vol/fssync_inline.h. For
	   SYNC_REASON_NONE, use -reason 0.

       -programtype <program type code>
	   Specifies program type code. Permitted values are fileServer, volumeUtility, salvager, salvageServer, volumeServer and volumeSalvager.

PRIVILEGE REQUIRED

       The issuer must have write access to the file server.  Usually, this means that the issuer must be the local superuser "root" on the file
       server machine.

SEE ALSO

       fssync-debug_header(8), fssync-debug_query(8)

COPYRIGHT

       Copyright 2010 Davor Ocelic <docelic@spinlocksolutions.com>

       This documentation is covered by the IBM Public License Version 1.0.  This man page was written by Davor Ocelic for OpenAFS, based on
       documentation from Steven Jenkins, Tom Keiser and Simon Wilkinson.

OpenAFS 							    2012-03-26						     FSSYNC-DEBUG_STATS(8)
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