date manipulation question

[srsr]

i am manipulating the date in a unix script as follows:

if [ $Day != 1 ]
then
Month=$(($Month + 1)) && Day=1

if [ $Month = 12 ]
then
Month=1 && Year=$(($Year + 1))
fi
fi


however i want to prefix the result to a filename, however it does not include zeros
eg 20020301 (1st march 2002) would be 200231

can anyone suggest a way to include the 0's

 

[aigles]

Hi,

you can use the printf command to format the date :

Prefix=$(printf "%04d%02d%02d" $Year $Month $Day)
Jean Pierre.

 

[srsr]

hi aigles

i am not sure what you mean by the above example?

if i have worked out that teh month is 02 and i want to add
1 to it, this cahnges the month to 3 without the leading zero. i want to keep the leading zeros? i can do this using printf??

thanks
srsr

 

[aigles]

use printf after manipulating the date :


if [ $Day != 1 ]
then
Month=$(($Month + 1)) && Day=1

if [ $Month = 12 ]
then
Month=1 && Year=$(($Year + 1))
fi
fi

Prefix=$(printf "%04d%02d%02d" $Year $Month $Day)


In your example, for the date 20020211 Prefix will be : 20020301

Jean Pierre.