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Batch File Redirect Output To File And Screen

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To capture "normal output" and "error messages", you need to also capture the STDERR stream, which is indicated by the "2" in "2>&1" in the command here: C:\>a.cmd > log.txt 2>&1 Display & Redirect Output On this page I'll try to explain how redirection works. In my case I would need it executed and then logged into a file for later reference." Since you say the program is running and its output is being put into I went with the second batch file option. –TMRW Jul 18 '13 at 17:44 add a comment| up vote 7 down vote Enclose your commands in round brackets. have a peek here

Can guns be rendered unusable by changing the atmosphere? With the NUL device that's no problem, but when redirecting to a file one of the redirections will lock the file for the other redirection. It is said Console cannot be redirected, and I believe that's true. A safer way to redirect STARTed commands' output would be to create and run a "wrapper" batch file that handles the redirection. browse this site

Batch File Redirect Output To File And Screen

A safer way to redirect STARTed commands' output would be to create and run a "wrapper" batch file that handles the redirection. share|improve this answer answered Jul 17 '13 at 12:46 Levans 1,572617 Thanks. Nothing new so far. Multiplication Formatting Did Kuntī deliver Karṇa through her womb?

  1. So for example, this: @echo off > 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 )
  2. asked 3 years ago viewed 27397 times active 2 years ago Blog How We Make Money at Stack Overflow: 2016 Edition Related 6How can I launch batch files from another batch
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  4. Those of you familiar with one of the Unix/Linux shells probably know what these streams are: Standard Output Standard Error Console Standard Output is the stream where all, well, standard output
  5. Can guns be rendered unusable by changing the atmosphere?
  6. Disconnect all previous connections to theserver or shared resource and try again..into the log files?

The "tee" command is not standard with windows, but you can download a free version of "tee" for windows here: wintee. In this case, we could also have used test.bat>NUL2>NUL This redirects Standard Output to the NUL device and Standard Error to the same NUL device. Use >logfile.txt2>errorlog.txt to redirect success and error messages to separate log files. Batch File Log Output With Date armor proficiency feats Noisy depth of field 5 Favorite Letters Why don't my users have separate desktops in Windows 10?

Display text To display a text on screen we have the ECHO command: ECHO Hello world This will show the following text on screen: Hello world When I say "on screen", Batch File Logging However, unlike files, devices will never be closed until reboot. On Marc Stern's web site I found a great solution: just place the redirections before the actual commands. http://www.robvanderwoude.com/redirection.php How do I get the last lines of dust into the dustpan?

This could be useful when prompting for input even if the batch file's output is being redirected to a file. Batch File Output To Text File With Timestamp Probably the most familiar example is MORE: DIR /S | MORE where the MORE command accepts DIR's Standard Output at its own Standard Input, chops the stream in blocks of 25 Browse other questions tagged command-line logging cmd.exe or ask your own question. Escaping Redirection (not to be interpreted as "Avoiding Redirection") Redirection always uses the main or first command's streams: START command > logfile will redirect START's Standard Output to logfile, not command's!

Batch File Logging

To run the netsh routing dump command and then send the command output to Route.cfg, type:netsh routing dump>c:\route.cfgThe > operator opens the specified file with write-only access. http://www.computerhope.com/forum/index.php?topic=104561.0 That is what you see on screen as normal messages, 2> or 2>> will output error messages.1 is the standard output stream.2 is the standard error stream.>,>> , <, and | Batch File Redirect Output To File And Screen This will capture the script output to the file named "log.txt" as before, and it will also display the output to the screen while the script is running: C:\>a.cmd 2>&1 | Batch File Output To Text File Append commandN >>output.txt A better way - easier to write, and faster. @echo off >output.txt ( command1 command2 ...

Being able to do caputer the dos system messages will go a long way in helping me to debug this batch file when it's run from scheduled tasks while the user navigate here For example, if you start a program with redirection >&0, all attempts to write handle 1 fail because handle 0 is initially opened with read-only access. Note•One is the default handle Escaping Redirection (not to be interpreted as "Avoiding Redirection") Redirection always uses the main or first command's streams: START command > logfile will redirect START's Standard Output to logfile, not command's! Logged gplApprentice Thanked: 27 Re: How to capture batch file error msg's? « Reply #3 on: May 11, 2010, 09:44:53 AM » Thank you for the confirmation of 2>> - I Redirect Batch File Output To Text File

Besides being used for redirection to the NUL device, with CTTYCOM1 the control could be passed on to a terminal on serial port COM1. Starting a new CMD shell also has a small (likely unnoticable) effect on performance. IF NOT "%OS%"=="Windows_NT" ECHO Usage: some_command ³ TEE.BAT [ -a ] filename IF NOT "%OS%"=="Windows_NT" GOTO Skip ECHO Usage: some_command ^| TEE.BAT [ -a ] filename :Skip ECHO. http://advogato.net/batch-file/batch-file-output-to-text-file.html A workaround that may look a bit intimidating is grouping the command line and escaping the redirection: START CMD.EXE /C ^(command ^> logfile^) What this does is turn the part between

Redirection with > or 2> will overwrite any existing file. Batch Redirect All Output To File Texas, USA speed ticket as a European citizen, already left the country Is every non stationary series convertible to a stationary series through differencing My boss asks me to stop writing Purpose of pins on side edge of QFN package How do you combine the elements in Sheldon's T-shirt?

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Not the answer you're looking for? There is another stream, Standard Input: many commands accept input at their Standard Input instead of directly from the keyboard. You can also redirect to a printer with > PRN or >LPT1 Multiple commands on one line In a batch file the default behaviour is to read and expand variables one Cmd Redirect Output To File Did the Chinese population really resort to cannibalism during the reign of Mao?

It is not ok to use spaces in >> or 2> or 2>&1 or 1>&2 (before or after is ok). 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 Menu Home News FAQ Search Scripting Languages Batch Files Getting Started Batch Techniques Batch HowTos Commands Command Line Switches Shutdown Commands Short Command Line Tips Admin One-Liners Examples Samples Collections Tools this contact form Old Forum Search | Forum Rules Copyright © 2013 Computer Hope All rights reserved.

In Windows XP the result is no text on screen and file.txt containing the line Helloworld2, including the trailing "2" (CMD.EXE interprets it as ECHOHelloworld2>file.txt). By definition Console isn't a stream. When and why use triangle solder joints Goodness Giza Golf! BC_ProgrammerMastermind Typing is no substitute for thinking.Thanked: 959 Certifications: List Computer: Specs Experience: Beginner OS: Windows 7 Re: How to capture batch file error msg's? « Reply #5 on: May 11,

Redirection usually results in temporary files. Make loop more efficient Differences between Interrupts and sampling for hardware button? Ok, now that we get the idea of this concept of "streams", let's play with it. In my case I would need it executed and then logged into a file for later reference.

Redirect "all" output to a single file: Run: test.bat > test.txt 2>&1 and you'll get this text on screen (we'll never get rid of this line on screen, as it is Top of pageRedirecting command output (>)Almost all commands send output to your Command Prompt window. There are tricks to decrease the number of file handles lost by redirection: redirect to (one single temporary) file instead of NUL specify a directory if you have to redirect to In Windows NT4 and later (CMD.EXE) and in OS/2 (also CMD.EXE) Standard Error can be redirected by using 2> instead of > A short demonstration.

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 You can use Cmd.exe to run a program and redirect any of the first 10 handles for the program. This could be useful when prompting for input even if the batch file's output is being redirected to a file. What 2>&1 does, is merge Standard Error into the Standard Output stream, so Standard output and Standard Error will continue as a single stream.

It will only do what it is supposed to do when placed at the end of the command line (as Jennie Walker pointed out to me) or right before the next Creating arrows based on GPS velocities to show displacement Countries where lecture duration does not exceed one hour Are human fetal cells used to produce Pepsi? Try this command: ECHO Hello world 2>NUL What you should get is: Hello world You see? It is said Console cannot be redirected, and I believe that's true.

Miscellaneous Tweaks Link Speed Test Web Stuff Conversions My Photo Galleries About This Site Disclaimer News FAQ Search What's New Objective Site Policy Your Preferences Credits The Making Of... Logged gplApprentice Thanked: 27 Re: How to capture batch file error msg's? « Reply #1 on: May 11, 2010, 09:15:09 AM » yes, it is more than possible, it is easy!the Redirecting Standard Error in "true" MS-DOS (COMMAND.COM) isn't possible (actually it is, by using the CTTY command, but that would redirect all output including Console, and input, including keyboard).