nasteal
asked on
XP Date batch for previous day
I currently have a batch file which gets the date and subtracts one day for file creation and directory creation but ran into the problem with the 1st day of month (1 - 1 = 0 of course) and its truncating the 01 of the day so instead of 03 for today's date it puts 3. Can someone help me with something that may work better, currently I'm using a set to grab portions of the date.
do you want to subtract 1 day from the given input date or you want to find yesterdays date from the current system date.
ASKER
Well I want to create a file with the previous day's date.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
What I have now is:
set YYMM=%date:~12,4%%date:~4, 2%
set DD=%date:~7,2%
set /a PDD = %DD% - 1
Which gives me the problem described above.
set YYMM=%date:~12,4%%date:~4,
set DD=%date:~7,2%
set /a PDD = %DD% - 1
Which gives me the problem described above.
ASKER
That code will work however it sets
YYYYMMDD
I am unfamiliar with tokens in the for, but I need YYMMDD and not sure how to strip off the 20 portion, I tried at the last line of code "if %yy% LSS 100 set yy=20%yy%", however removing it the date still shows 2008. Thanks for pointing out that bit of code, I just need to figure out the portion to remove the "20"
YYYYMMDD
I am unfamiliar with tokens in the for, but I need YYMMDD and not sure how to strip off the 20 portion, I tried at the last line of code "if %yy% LSS 100 set yy=20%yy%", however removing it the date still shows 2008. Thanks for pointing out that bit of code, I just need to figure out the portion to remove the "20"
@echo off
setlocal
call :get_date
:: Strip leading zeros from possible octals and decrement the day
set /a mm=1%mm%-100, dd=1%dd%-101
if %dd% NEQ 0 goto :add_zeros
:: Today is the 1st of the month - decrement the month
:: and set leap year check (ignoring centuries)
set /a mm-=1,ly=yy%%4
:: If today is 1 Jan, set date to 31st Dec
if %mm% EQU 0 (set /a dd=31, mm=12, yy-=1) else (
rem Calculate days in last month (by Frank Westlake)
set /a "dd=5546>>mm&1,dd+=30"
rem Special case for February
if %mm% EQU 2 if %ly% EQU 0 (set dd=29) else (set dd=28)
)
:add_zeros
if %dd% LSS 10 set dd=0%dd%
if %mm% LSS 10 set mm=0%mm%
echo yesterday was %yy%%mm%%dd%
goto :eof
:: ------------------------------------------------------------------
:Get_Date
:: ------------------------------------------------------------------
:: Generic date parser
:: Sets %dd% (01-31), %mm% (01-12) & %yy% (4 digit)
if "%date%A" LSS "A" (set toks=1-3) else (set toks=2-4)
for /f "skip=1 tokens=2-4 delims=(-)" %%a in ('echo:^|date') do (
for /f "tokens=%toks% delims=.-/ " %%d in ('date/t') do (
set %%a=%%d
set %%b=%%e
set %%c=%%f
set toks=
)
)
if %yy% LSS 100 set yy=20%yy%
goto :eof
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.