hi all,
i want script to print the output in the following format
filename yyyy/mm/dd count
where count= no.of records in the file
Thanks in advance
hemanthsaikumar
for file in *
do
count=$(wc -l < $file)
echo $file `date +%Y/%m/%d` $count
done
1 Like
hey thankyou very much for your help
one more doubt
i want to restrict the filename to 30 bytes.. that means if the file name is 20 bytes it should print the 30 byte name by taking the space as input
Thanks in advance
saikumar
for file in *
do
count=$(wc -l < $file)
#echo $file `date +%Y/%m/%d` $count
printf "%-30s %10s %5d\n " $file `date +%Y/%m/%d` $count
done
if the file name length is less than 30 bytes the spaces are getting appended...
what if the file name is greater than 30 bytes....?
for the above code it is not getting trimmed to 30 bytes....
thanks in advance
saikumar.
for file in *
do
COUNT=$(wc -l < $file)
DATE=$(date +%Y/%m/%d)
file=${file:0:30}
#echo $file `date +%Y/%m/%d` $count
printf "%-30s %10s %5d\n " $file $DATE $COUNT
done
could you please explain what is
file=${file:0:30}
%-30s %10s %5d\n
go through the ABS (advanced bash scripting guide), you should get all the answers.
1 Like
thank u very much for your time being help... 
Also in this forum, has "man page" already:
Man Page for printf (linux Section 1) - The UNIX and Linux Forums
Man Page for bash (linux Section 1) - The UNIX and Linux Forums
${parameter:offset}
${parameter:offset:length}
Substring Expansion. Expands to up to length characters of
parameter starting at the character specified by offset. If
length is omitted, expands to the substring of parameter start-
ing at the character specified by offset. length and offset are
arithmetic expressions (see ARITHMETIC EVALUATION below). If
offset evaluates to a number less than zero, the value is used
as an offset from the end of the value of parameter. Arithmetic
expressions starting with a - must be separated by whitespace
from the preceding : to be distinguished from the Use Default
Values expansion. If length evaluates to a number less than
zero, and parameter is not @ and not an indexed or associative
array, it is interpreted as an offset from the end of the value
of parameter rather than a number of characters, and the expan-
sion is the characters between the two offsets. If parameter is
@, the result is length positional parameters beginning at off-
set. If parameter is an indexed array name subscripted by @ or
*, the result is the length members of the array beginning with
${parameter[offset]}. A negative offset is taken relative to
one greater than the maximum index of the specified array. Sub-
string expansion applied to an associative array produces unde-
fined results. Note that a negative offset must be separated
from the colon by at least one space to avoid being confused
with the :- expansion. Substring indexing is zero-based unless
the positional parameters are used, in which case the indexing
starts at 1 by default. If offset is 0, and the positional
parameters are used, $0 is prefixed to the list.
hi,
by the above code while trimming the length of the filename to 30 bytes ,the extension is also getting trimmed 
like if the filename is abscderss.txt(assume as its length is greater than 30 bytes)
the code u above mentioned is printing the output as
abscder (it is removing extension too )
thanks in advance
saikumar
for file in *
do
COUNT=$(wc -l < $file)
DATE=$(date +%Y/%m/%d)
SUFFIX=${file##*.}
NAME=${file%.*}
file=${NAME:0:30}.$SUFFIX
#echo $file `date +%Y/%m/%d` $count
printf "%-30s %10s %5d\n " $file $DATE $COUNT
done