I want to search the help message with grep command, xx /? | grep regex? Contact Failed Mail Donate Batch How To ... It can just be dir >> a.txt 2>&1 –raychi Sep 11 '15 at 23:06 add a comment| up vote 4 down vote I just chopped out the answer as @Anders just SomeCommand.exe > temp.txt OtherCommand.exe >> temp.txt By default, the > and >> operators redirect stdout. Source
For example, you can write a listing of the current directory to a text file: DIR > temp.txt The > operator will overwrite the contents of temp.txt with stdout from the dir 1>files.txt 2>&1 2>&1 redirects stream2 to stream1 and 1>files.txt redirects all to files.txt. Sending a stranger's CV to HR Why can't the second fundamental theorem of calculus be proved in just two lines? up vote 18 down vote favorite 10 I'm working in a Windows CMD.EXE environment and would like to change the output of stdout to match that of stderr so that I
Why mention town and country of equipment manufacturer? I strongly suspect this has got to do with the way "cmd" parses commands that gives two different meanings depending on the order in which you specify the redirection. Reverse Lookup: getting keys from values Using "están" vs "estás" when refering to "you" How much more than my mortgage should I charge for rent? For example, cls >con: does not clear the screen, it prints a funny character to the screen instead.
Join them; it only takes a minute: Sign up How do I echo and send console output to a file in a bat script? Contact Failed Mail Donate Redirection Redirection command > file Write standard output of command to file command 1> file Write standard output of command to file (same as previous) command Therefore 2> 2.txt works (or 2> &1) 2 > 2.txt does not; 2 > &1 does not. –The Red Pea Apr 3 '15 at 21:41 Reference document from Microsoft: Windows Echo To Stderr Is there a way to have the output show on the console window as well?
This can be useful for error messages. Windows Stderr This could be useful when prompting for input even if the batch file's output is being redirected to a file. Esker" mean? http://stackoverflow.com/questions/503846/how-do-i-echo-and-send-console-output-to-a-file-in-a-bat-script share|improve this answer answered Mar 8 '13 at 16:24 sage 1,17411225 add a comment| up vote 1 down vote Yes, there is a way to show a single command output on
If you don't care about stdout then you can redirect to nul program.exe 2>&1 1>nul | find " " If you want to capture stdout to a file then redirect to Pipe Command Output To File Linux Much better, isn't it? dir > file.txt > file.txt dir The redirection in this example is only a shortcut for 1>, this means the stream 1 (STDOUT) will be redirected. Standard Error is the stream where many (but not all) commands send their error messages.
So technically, the explicit redirection of 3 is not needed to swap stderr and stdout program.exe 2>&1 1>&3 | find " " 2>&1 saves stderr in 3 and 2 is redirected http://www.robvanderwoude.com/battech_redirection.php Why does a shorter string of lights not need a resistor? Windows Redirect Stderr To Stdout What commercial flight route has the biggest number of (minimum possible) stops/layovers from A to B? Windows Tee Output So you get command 1>&1 dir 1>&2 And in the first sample redirecting of stream1 to stream1 is not allowed (and not very useful).
Take this imaginary batch file, for example: ECHO Directory of all files on C: >> LOG1.LOG
DIR C:\ /S >> LOG1.LOG Not exactly easy on the eye, that one? http://speciii.com/output-to/windows-command-line-redirect-error-output-to-file.html Using your example, use... @ECHO OFF FOR /F "tokens=*" %%I IN ('DIR') DO ECHO %%I & ECHO %%I>>windows-dir.txt Detailed explanation: The FOR command parses the output of a command or text PING 127.0.0.1 > NUL Redirecting Program Output As Input to Another Program Let’s say you want to chain together the output of one program as input to another. In order to redirect STDERR you have to specify "2>" for the redirection symbol. Windows Redirect Stderr To Null
Trick or Treat polyglot Why is this C++ code faster than assembly Are basis vectors imaginary in special relativity? PAUSE share|improve this answer edited Oct 14 '15 at 6:28 Amazinate 33 answered Jan 5 '15 at 1:56 Amazinate 112 add a comment| up vote 0 down vote The solution provided asked 7 years ago viewed 191273 times active 1 year ago Blog Stack Overflow Podcast #93 - A Very Spolsky Halloween Special Visit Chat Linked 0 How to get error in have a peek here net stop w3svc >NUL 2>&1..
if you are debugging i would not use the > file syntax. –Random Developer Feb 2 '09 at 16:48 4 if I do "dir > file.txt >&2" file.txt is not Windows Command Line Pipe Output To Another Command Output a googol copies of a string Should the sole user of a *nix system have two accounts? What are the disadvantages of a delta wing biplane design?
The “Standard Out” file, known as stdout, is used to write output for display on the screen. Duly edited my answer. –AirCombat Jul 29 '15 at 18:54 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up Where you put 2>&1 is rather critical. Batch File Redirect Output To File Guides Guide to Windows Batch Scripting Recent Posts Parsing Jenkins secrets in a shell script Jenkins Job to export Rackspace Cloud DNS Domain As BIND Zone Files Troubleshooting GitHub WebHooks SSL
program.exe 3>&2 2>&1 1>&3 | find " " Actually there is an additional file handle defined every time a redirection is performed. asked 4 years ago viewed 7580 times active 1 year ago Blog Stack Overflow Podcast #93 - A Very Spolsky Halloween Special Linked 20 Why doesn't my stderr redirection end after I was assuming that DIR DoesNotExist 2>&1 1>&3 would be the same as DIR DoesNotExist 2>&1 1>&3 | find " ", because DIR DoesNotExist 2>&1 1>nul works. Check This Out Miscellaneous Tweaks 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...
Browse other questions tagged windows windows-7 windows-command-prompt stdout or ask your own question. It is possible to truly swap stdout and stderr if you use a 3rd (initially unused) file handle. 1 and 3 will contain original definition of stderr, and 2 will contain To get rid of screen output sent directly to the Console, either run the program in a separate window (using the START command), or clear the screen immediately afterwards (CLS). This is known as “piping” output to another program, and not suprisingly we use the pipe character | to get the job done.
A common technique is to use > to create/overwrite a log file, then use >> subsequently to append to the log file. Is it possible, or should I just redirect to two separate files? 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. SORT < SomeFile.txt Suppressing Program Output The pseudofile NUL is used to discard any output from a program.
Composition of Derangements What does "M.C." in "M.C. What is Wilson's theorem? I experimented with 3<&2 (note the LT instead of GT), and then 3>errors.txt. 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.
How about this one, then? >> LOG1.LOG ECHO Directory of all files on C:
>> LOG1.LOG DIR C:\ /S It will do exactly the same, no difference! So you can redirect any stream with prepending the number like 2> err.txt and it is also allowed to redirect multiple streams in one line. Hot Network Questions English fellow vs Arabic fellah Auto publishing for specific items How do I unexpand a file name? Note that if you're using these to make log files, then unless you're sending the outut to _uniquely_named_ (eg date-and-time-stamped) log files, then if you run the same process twice, the
Interlace strings Trick or Treat polyglot Why does Wolfram Alpha say the roots of a cubic involve square roots of negative numbers, when all three roots are real? "/usr/bin/ping" is shown Nothing That's because the error message was sent to the Standard Error stream, which was in turn redirected to the NUL device by 2>NUL When we use > to redirect Standard Replace the DIR /B text with your desired command. windows batch-file cmd share|improve this question edited Mar 12 '15 at 22:18 Ross Ridge 18.2k22050 asked Feb 2 '09 at 16:38 JamesEggers 5,960104478 Here are explained the redirections you