reverse of basename

Shell Programming and Scripting
1

Hi,
Can someone let me know how to find the reverse of the basename i.e
i have /apps/tiv/pmon/xxxx.dat and I want /apps/tiv/pmon/

Thanks

2

Check out dirname

3

try this:

cat test
/apps/tiv/pmon/xxxx.dat

sed 1,$"s/........$//g" test
/apps/tiv/pmon/
4

Ksh builtin

$var=/home/admin/test/123.sh
$echo $var
/home/admin/test/123.sh
$echo ${var%/*}
/home/admin/test
5

Alternative in python

>>> import os
>>> os.path.split("/apps/tiv/pmon/xxxx.dat")
('/apps/tiv/pmon', 'xxxx.dat')
>>> os.path.split("/apps/tiv/pmon/xxxx.dat")[0]
'/apps/tiv/pmon'
>>>
6

Excellent !! Thanks,

Small question,

In the statement, what does %/* infer to,
$echo ${var%/*}

I have come across
${var-nvar} if var unassigned return nvar, ${var+nvar}, if var assigned returned nvar. But could you tell me the signifcance of %/* pls ?,
Thanks

7 
$echo ${var%/*}

Strips shortest match of "/*" from back of string var.

8

See this: The UNIX and Linux Forums - Free Tech Support for more explanation.