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 You may want to read about >> and | (pipe), too. 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). 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-pipe-std-error.html
Besides being used for redirection to the NUL device, with CTTYCOM1 the control could be passed on to a terminal on serial port COM1. 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. You can redirect stderr by using the file number 2 in front of the operator: DIR SomeFile.txt 2>> error.txt You can even combine the stdout and stderr streams using the file Not the answer you're looking for?
windows batch-file batch-processing share|improve this question edited Jun 4 '13 at 9:51 Peter Mortensen 10.3k1369107 asked May 18 '09 at 13:03 mkl related: stackoverflow.com/questions/11170753/… –eckes Jul 7 at 10:40 Cmd Pipe To Variable What are the disadvantages of a delta wing biplane design? temporary file not found in sh script Interlace strings Using "están" vs "estás" when refering to "you" aligning shapes in latex Why was Susan treated so unkindly? Solutions?
What is Wilson's theorem? More about the author Happy trails... Batch Redirect Output To File And Console 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 Windows Command Line Pipe Output To Another Command How to use sort on an awk print command?
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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 This is because error messages are often sent to the Standard Error stream instead of the Standard Out stream. We’ll sort the output of the DIR commmand. Source asked 7 years ago viewed 191273 times active 1 year ago Blog Stack Overflow Podcast #93 - A Very Spolsky Halloween Special Linked 0 How to get error in output file
redirect stderr cmd share|improve this question edited Oct 9 '15 at 21:37 Peter Mortensen 10.3k1369107 asked Dec 22 '10 at 8:14 Ignacio Soler Garcia 10.2k1379149 18 like this: command 2> Windows Redirect Stderr To Null The result will be an empty logfile. Where you put 2>&1 is rather critical.
So you get a cumulative logfile, showwing the results from all runs of the process - typically more useful. What are the alternatives to compound interest for a Muslim? I can assure you I did try! Windows Stderr How to prepare for impending doom Player claims their wizard character knows everything (from books).
We redirect stdout to the NUL device to avoid printing the output on the command prompt screen. The find command selects only file names that contain the string "LOG." The more command displays the file names that are selected by the find command, one Command Prompt window at Windows doesn't expect anything at this time. –harpo Jul 25 '14 at 3:51 add a comment| up vote 3 down vote After about one day of digging, I found a way have a peek here What is an instant of time?
The regular output is sent to Standard Out (STDOUT) and the error messages are sent to Standard Error (STDERR). For example, to send dir output to File.txt and send the error output to File.txt, type:dir>c:\file.txt 2>&1When you duplicate a handle, you duplicate all characteristics of the original occurrence of the REM *** WARNING: THIS WILL NOT REDIRECT STDERR TO STDOUT **** dir 2>&1 > a.txt share|improve this answer edited Oct 9 '15 at 19:40 Peter Mortensen 10.3k1369107 answered May 23 '13 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