Shell Programming and Scripting

To understand which version you are on you might eventually consider some really farfetched idea, like telling us this information. Issue

Code:

oslevel -s

and post the output.

I think the problem is with the missing spaces. As far as i know ksh needs spaces around the double brackets. Either this or you use ksh88 and this does not understand every infix notation. Try one of those instead (notice the additional spaces!):

Code:

(( i++ ))
(( i += 1 ))

I don't think so. Which version exactly you have would depend on the version of AIX (see above) but in general AIX uses a ksh88 as /usr/bin/ksh and as default shell and has a ksh93 as /usr/bin/ksh93.

istat is the correct method of getting inode information. According to this link which not only provides a thorough explanation of what it does but also a sample output it will look like:

Code:

istat /usr/bin/ksh
Inode 10360 on device 10/6    File
Protection: r-xr-xr-x
Owner: 2(bin)     Group: 2(bin)
Link count: 2     Length 372298 bytes
   
Last updated:  Wed May 13 14:08:13 1992
Last modified: Wed May 13 13:57:00 1992
Last accessed: Sun Jan 31 15:49:23 1993

therefore, to display the filesize, issue:

Code:

istat /path/to/file | sed -n '/Length/ {;s/.*Length //;s/ bytes.*//p;}'

I hope this helps.

bakunin

Thanks for taking the Time in explaining that for me. I tried a simple command that told me the version was 3, but I don't believe that is specific enough so I will give that a shot when I'm back at the terminal next week, I will also look into iNode and the Arithmetic options you gave me and see what I can gather.



Thank you for the Explanation

I don't know (and, in fact, can't even start to imagine) which simple command that might have been: the Korn shell comes in two "versions" (actually rather "language standards", like "FORTRAN77", than versions): "ksh88" basically means compatible to the version which was released 1988, eventually minus bugs in the original corrected since then and "ksh93" (the same but for the enhanced version released 1993).

You get the real version information for both of them in the following way: display the content of the system-variable ${.sh.version}. For my system i get:

Code:

# print - ${.sh.version}
Version AJM 93u+ 2012-08-01

This means it is a ksh93 and the version is "u+" from 2012, as ksh93 versions are "numbered" by characters: a, b, c, ... If i remember correctly the latest version of ksh93 is "w", so mine is pretty up to date.

I hope this helps.

bakunin

Code:

 uname -v