File/directory information...... Post: 12896

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Top Forums UNIX for Dummies Questions & Answers File/directory information...... Post 12896 by Perderabo on Tuesday 8th of January 2002 04:27:58 PM

01-08-2002

Administrator Emeritus

I think the best approach is to break the permission string up into an array with each element of the array being a single character. Then a few "if" statements can handle those pesky suid, sgid and sticky bits. Once they are gone, what's left is really a binary number with hyphen being a zero and everything else being a one. We can then convert that binary number to octal. Finally we just add in any of those high bits we found.

Part of the problem may be that the OP has a PATH with some screwy versions of normal system commands. So setting the PATH is probably wise.

Here is a script that displays the numeric mode for a file that is passed as a argument...

Code:

#! /usr/bin/ksh
PATH=/usr/bin

integer -i8 octal

ls -l $1 | read permstring junk
set -A perms -- $(print -- ${permstring#?} | sed 's/./& /g')

extras=0
[[ ${perms[2]} = S ]] && { ((extras=extras+4000)); perms[2]=- ; }
[[ ${perms[2]} = s ]] && { ((extras=extras+4000)); perms[2]=x ; }
[[ ${perms[5]} = S ]] && { ((extras=extras+2000)); perms[4]=- ; }
[[ ${perms[5]} = s ]] && { ((extras=extras+2000)); perms[4]=x ; }
[[ ${perms[8]} = T ]] && { ((extras=extras+1000)); perms[8]=- ; }
[[ ${perms[8]} = t ]] && { ((extras=extras+1000)); perms[8]=x ; }

binary=2#$(print -- ${perms[@]} | sed 's/ //g;s/-/0/g;s/[^0]/1/g')
((octal=binary))
result=$(echo $octal)
result=${result#??}
((result=result+extras))

echo $result

exit 0

Makaveli.2003, does this script work for you? And I too would like to know what "uname -a" and "echo $PATH" give you.

Perderabo

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set_ucodepage

set_ucodepage(3alleg4)						  Allegro manual					    set_ucodepage(3alleg4)

NAME

       set_ucodepage - Sets 8-bit to Unicode conversion tables. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void set_ucodepage(const unsigned short *table, const unsigned short *extras);

DESCRIPTION

       When  you  select the U_ASCII_CP encoding mode, a set of tables are used to convert between 8-bit characters and their Unicode equivalents.
       You can use this function to specify a custom set of mapping tables, which allows you to support different 8-bit codepages.

       The `table' parameter points to an array of 256 shorts, which contain the Unicode value for each character in your codepage.  The  `extras'
       parameter,  if  not NULL, points to a list of mapping pairs, which will be used when reducing Unicode data to your codepage. Each pair con-
       sists of a Unicode value, followed by the way it should be represented in your codepage.  The list is terminated by a zero  Unicode  value.
       This  allows  you to create a many->one mapping, where many different Unicode characters can be represented by a single codepage value (eg.
       for reducing accented vowels to 7-bit ASCII).

       Allegro will use the `table' parameter when it needs to convert an ASCII string to an Unicode string. But when Allegro converts an  Unicode
       string  to  ASCII, it will use both parameters. First, it will loop through the `table' parameter looking for an index position pointing at
       the Unicode value it is trying to convert (ie. the `table' parameter is also used for reverse matching). If that fails, the  `extras'  list
       is used. If that fails too, Allegro will put the character `^', giving up the conversion.

       Note that Allegro comes with a default `table' and `extras' parameters set internally. The default `table' will convert 8-bit characters to
       `^'.  The default `extras' list reduces Latin-1 and Extended-A characters to 7 bits in a sensible  way  (eg.  an  accented  vowel  will	be
       reduced to the same vowel without the accent).

SEE ALSO

       set_uformat(3alleg4)

Allegro 							   version 4.4.2					    set_ucodepage(3alleg4)

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