Redirecting Output from within Batch file

Question

I am creating a batch file with some simple commands to gather information from a system  The batch file contains commands to get the time  IP information  users  etc     I assembled all the commands in a batch file  and it runs  but I would like the batch file  when run to output the results to a text file  log   Is there a command that I can add to the batch that would do so     Keep in mind I do not want to run the batch from cmd  then redirect output   I want to redirect the output from inside the batch  if that is possible

User · Answer

There is a cool little program you can use to redirect the output to a file and the console

some_command  ^|  TEE.BAT  [ -a ]  filename

_x000D_

@ECHO OFF_x000D_
:: Check Windows version_x000D_
IF NOT "%OS%"=="Windows_NT" GOTO Syntax_x000D_
_x000D_
:: Keep variables local_x000D_
SETLOCAL_x000D_
_x000D_
:: Check command line arguments_x000D_
SET Append=0_x000D_
IF /I [%1]==[-a] (_x000D_
 SET Append=1_x000D_
 SHIFT_x000D_
)_x000D_
IF     [%1]==[] GOTO Syntax_x000D_
IF NOT [%2]==[] GOTO Syntax_x000D_
_x000D_
:: Test for invalid wildcards_x000D_
SET Counter=0_x000D_
FOR /F %%A IN ('DIR /A /B %1 2^>NUL') DO CALL :Count "%%~fA"_x000D_
IF %Counter% GTR 1 (_x000D_
 SET Counter=_x000D_
 GOTO Syntax_x000D_
)_x000D_
_x000D_
:: A valid filename seems to have been specified_x000D_
SET File=%1_x000D_
_x000D_
:: Check if a directory with the specified name exists_x000D_
DIR /AD %File% >NUL 2>NUL_x000D_
IF NOT ERRORLEVEL 1 (_x000D_
 SET File=_x000D_
 GOTO Syntax_x000D_
)_x000D_
_x000D_
:: Specify /Y switch for Windows 2000 / XP COPY command_x000D_
SET Y=_x000D_
VER | FIND "Windows NT" > NUL_x000D_
IF ERRORLEVEL 1 SET Y=/Y_x000D_
_x000D_
:: Flush existing file or create new one if -a wasn't specified_x000D_
IF %Append%==0 (COPY %Y% NUL %File% > NUL 2>&1)_x000D_
_x000D_
:: Actual TEE_x000D_
FOR /F "tokens=1* delims=]" %%A IN ('FIND /N /V ""') DO (_x000D_
 >  CON    ECHO.%%B_x000D_
 >> %File% ECHO.%%B_x000D_
)_x000D_
_x000D_
:: Done_x000D_
ENDLOCAL_x000D_
GOTO:EOF_x000D_
_x000D_
:Count_x000D_
SET /A Counter += 1_x000D_
SET File=%1_x000D_
GOTO:EOF_x000D_
_x000D_
:Syntax_x000D_
ECHO._x000D_
ECHO Tee.bat,  Version 2.11a for Windows NT 4 / 2000 / XP_x000D_
ECHO Display text on screen and redirect it to a file simultaneously_x000D_
ECHO._x000D_
IF NOT "%OS%"=="Windows_NT" ECHO Usage:  some_command  ³  TEE.BAT  [ -a ]  filename_x000D_
IF NOT "%OS%"=="Windows_NT" GOTO Skip_x000D_
ECHO Usage:  some_command  ^|  TEE.BAT  [ -a ]  filename_x000D_
:Skip_x000D_
ECHO._x000D_
ECHO Where:  "some_command" is the command whose output should be redirected_x000D_
ECHO         "filename"     is the file the output should be redirected to_x000D_
ECHO         -a             appends the output of the command to the file,_x000D_
ECHO                        rather than overwriting the file_x000D_
ECHO._x000D_
ECHO Written by Rob van der Woude_x000D_
ECHO http://www.robvanderwoude.com_x000D_
ECHO Modified by Kees Couprie_x000D_
ECHO http://kees.couprie.org_x000D_
ECHO and Andrew Cameron

_x000D_

User · Answer

Add these two lines near the top of your batch file  all stdout and stderr after will be redirected to log txt   if not   1    STDOUT TO FILE    0 STDOUT TO FILE      gt log txt 2 gt  amp 1 shift  1

User · Answer

I know this is an older post  but someone will stumble across it in a Google search and it also looks like some questions the OP asked in comments weren t specifically addressed  Also  please go easy on me since this is my first answer posted on SO      To redirect the output to a file using a dynamically generated file name  my go-to  read  quick  amp  dirty  approach is the second solution offered by  dbenham  So for example  this    echo off  gt  filename prefix- DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log   echo Your Name Here echo Beginning Date Time   DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log REM do some stuff here echo Your Name Here echo Ending Date Time   DATE  -4 - DATE  4 2 - DATE  7 2   time  0 2  time  3 2  time  6 2  log     Will create a file like what you see in this screenshot of the file in the target directory  That will contain this output   Your Name Here Beginning Date Time  2016-09-16 141048 log Your Name Here Ending Date Time  2016-09-16 141048 log   Also keep in mind that this solution is locale-dependent  so be careful how when you use it

User · Answer

echo some output  gt  your logfile    or     echo some output  echo more output   gt  Your logfile    should fill the bill   If you want to APPEND the output  use  gt  gt  instead of  gt    gt  will start a new logfile

User · Answer

if you want both out and err streams redirected  dir  gt  gt  a txt 2 gt  amp 1

User · Answer

The simple naive way that is slow because it opens and positions the file pointer to End-Of-File multiple times    echo off command1  gt output txt command2  gt  gt output txt     commandN  gt  gt output txt   A better way - easier to write  and faster because the file is opened and positioned only once    echo off  gt output txt     command1   command2         commandN     Another good and fast way that only opens and positions the file once   echo off call  sub  gt output txt exit  b   sub command1 command2     commandN   Edit 2020-04-17  Every now and then you may want to repeatedly write to two or more files  You might also want different messages on the screen  It is still possible to to do this efficiently by redirecting to undefined handles outside a parenthesized block or subroutine  and then use the  amp  notation to reference the already opened files   call  sub 9 gt File1 txt 8 gt File2 txt exit  b   sub echo Screen message 1  gt  amp 9 File 1 message 1  gt  amp 8 File 2 message 1 echo Screen message 2  gt  amp 9 File 1 message 2  gt  amp 8 File 2 message 2 exit  b   I chose to use handles 9 and 8 in reverse order because that way is more likely to avoid potential permanent redirection due to a Microsoft redirection implementation design flaw when performing multiple redirections on the same command  It is highly unlikely  but even that approach could expose the bug if you try hard enough  If you stage the redirection than you are guaranteed to avoid the problem   3 gt File1 txt   4 gt File2 txt call  sub  exit  b   sub etc

User · Answer

This may fail in the case of  toxic  characters in the input  Considering an input like thisIsAnIn    put is a good way how to get understand what is going on  Sure there is a rule that an input string MUST be inside double quoted marks but I have a feeling that this rule is a valid rule only if the meaning of the input is a location on a NTFS partition  maybe it is a rule for URLs I am not sure   But it is not a rule for an arbitrary input string of course  it is  a good practice  but you cannot count with it

User · Answer

echo off  gt output txt   echo Checking your system infor  Please wating     systeminfo   findstr  c  Host Name   systeminfo   findstr  c  Domain   ipconfig  all   find  Physical Address    ipconfig   find  IPv4   ipconfig   find  Default Gateway       pause

User · Answer

Adding the following lines at the bottom of your batch file will grab everything just as displayed inside the CMD window and export into a text file  powershell -c  quot  wshell   New-Object -ComObject wscript shell   wshell SendKeys   a   powershell -c  quot  wshell   New-Object -ComObject wscript shell   wshell SendKeys   c   powershell Get-Clipboard  gt  MyLog txt  It basically performs a select all - gt  copy into clipboard - gt  paste into text file

User · Answer

echo OFF  your command   gt  gt   Your log file name  txt   I used the command above in my batch file and it works  In the log file  it shows the results of my command

[windows] Redirecting Output from within Batch file

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