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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 OPENSOLARIS

wsprintf

wsprintf(3C)						   Standard C Library Functions 					      wsprintf(3C)

NAME

       wsprintf - formatted output conversion

SYNOPSIS

       #include <stdio.h>
       #include <widec.h>

       int wsprintf(wchar_t *s, const char *format, /* arg */ ... ););

DESCRIPTION

       The wsprintf() function outputs a Process Code string ending with a Process Code (wchar_t) null character.  It is the user's responsibility
       to allocate enough space for this wchar_t string.

       This returns the number of Process Code characters (excluding the null terminator) that have been written.  The	conversion  specifications
       and behavior of wsprintf() are the same as the regular sprintf(3C) function except that the result is a Process Code string for wsprintf(),
       and on Extended Unix Code (EUC) character string for sprintf().

RETURN VALUES

       Upon successful completion, wsprintf() returns the number of characters printed. Otherwise, a negative value is returned.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |MT-Level		      MT-Safe			   |
       +-----------------------------------------------------------+

SEE ALSO

       wsscanf(3C), printf(3C), scanf(3C), sprintf(3C), attributes(5)

SunOS 5.11							    29 Dec 1996 						      wsprintf(3C)
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