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Redirect Error To File Windows

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table lists operators that you can use to redirect command input and output streams.Redirection operatorDescription>Writes the command output to a file or a device, such as a printer, instead of the Command Prompt window.>Appends the command output to the end of a file without deleting the information that is already in the file.>&Writes the output from one handle to the input of another handle.<&Reads the input from one handle and writes it to the https://support.microsoft.com/en-us/kb/110930 output of another handle.|Reads the output from one command and writes it to the input of another command. Also known as a pipe. By default, you send the command input (that is, the STDIN handle) from your keyboard to Cmd.exe, and then Cmd.exe sends the command output (that is, the STDOUT handle) to the Command Prompt window.The following table lists the https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx available handles.HandleNumeric equivalent of handleDescriptionSTDIN0Keyboard inputSTDOUT1Output to the Command Prompt windowSTDERR2Error output to the Command Prompt windowUNDEFINED3-9These handles are defined individually by the application and are specific to each tool.The numbers zero through nine (that is, 0-9) represent the first 10 handles. You can use Cmd.exe to run a program and redirect any of the first 10 handles for the program. To specify which handle you want to use, type the number of the handle before the redirection operator. If you do not define a handle, the default < redirection input operator is zero (0) and the default > redirection output operator is one (1). After you type the < or > operator, you must specify where you want to read or write the data. You can specify a file name or another existing handle.To specify redirection to existing handles, use the ampersand (&) character followed by the handle number that you want to redirect (that is, &handle#). For example, the following command redirects handle 2 (that is, STDERR) into handle 1 (that is, STDOUT):1<&2Duplicating handles The & redirection operator duplicates output

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site http://stackoverflow.com/questions/482678/how-to-capture-stderr-on-windows-dos About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss http://steve-jansen.github.io/guides/windows-batch-scripting/part-4-stdin-stdout-stderr.html Join the Stack Overflow Community Stack Overflow is a community of 6.3 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to capture stderr redirect error on Windows/DOS? up vote 34 down vote favorite 10 I want to capture the errors from a script into a file instead of to the screen. In *nix, this is done with stderr redirection, usually echo "Error" 2> errorfile.log How do I do it in a CMD script under Windows? windows scripting batch-file cmd stderr share|improve this question edited Oct 9 '15 at 19:42 Peter redirect error to Mortensen 10.3k1369107 asked Jan 27 '09 at 8:46 mik 4982914 add a comment| 2 Answers 2 active oldest votes up vote 43 down vote accepted For example: PSKILL NOTEPAD >output.txt 2>&1 This will direct stdout and stderr to a file name output.txt. See Underused features of Windows batch files for more details. share|improve this answer answered Jan 27 '09 at 12:49 aphoria 12.5k34056 7 If you want them redirected to separate files, you can do mycommand >stdout.txt 2>stderr.txt –Kip Oct 24 '12 at 16:15 add a comment| up vote 19 down vote That should work in Win32, too. If you have already redirected stdout, and want stderr redirected to the same file, you must use the 2>& special form, rather than just specifying the same file twice. Otherwise you'll get a "file busy" error. share|improve this answer answered Jan 27 '09 at 8:50 unwind 256k39332460 This is also covered in Redirect stdout and stderr to a single file. –Peter Mortensen Oct 9 '15 at 20:50 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up

4 – stdin, stdout, stderr Part 5 – If/Then Conditionals Part 6 – Loops Part 7 – Functions Part 8 – Parsing Input Part 9 – Logging Part 10 – Advanced Tricks DOS, like Unix/Linux, uses the three universal “files” for keyboard input, printing text on the screen, and the printing errors on the screen. The “Standard In” file, known as stdin, contains the input to the program/script. The “Standard Out” file, known as stdout, is used to write output for display on the screen. Finally, the “Standard Err” file, known as stderr, contains any error messages for display on the screen. File Numbers Each of these three standard files, otherwise known as the standard streams, are referernced using the numbers 0, 1, and 2. Stdin is file 0, stdout is file 1, and stderr is file 2. Redirection A very common task in batch files is sending the output of a program to a log file. The > operator sends, or redirects, stdout or stderr to another file. 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 command. The >> operator is a slight variant that appends the output to a target file, rather than overwriting the target file. A common technique is to use > to create/overwrite a log file, then use >> subsequently to append to the log file. SomeCommand.exe > temp.txt OtherCommand.exe >> temp.txt By default, the > and >> operators redirect stdout. 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 number and the & prefix: DIR SomeFile.txt 2>&1 This is useful if you want to write both stdout and stderr to a single log file. DIR SomeFile.txt > output.txt 2>&1 To use the contents of a file as the input to a program, instead of typing the input from the keyboard, use the < operator. SORT < SomeFile.txt Suppressing Program Output The pseudofile NUL is used to discard any output from a program. Here is an example of emulating the Unix command sleep by calling ping against the loopback address. We redirect stdout to the NUL device to avoid printing the output on the command prompt screen. 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. This is known as “piping” output to another program, and not suprisingly we use the pipe character | to get the job d

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Unix Redirect Error Output p is connected to the terminal keyboard and standard output and error to the terminal screen The way of indicating an end-of-file on the default standard input a terminal is usually Ctrl-d Redirection of I O for example to a file is accomplished by specifying linux redirect error output the destination on the command line using a redirection metacharacter followed by the desired destination C windows redirect error output Shell Family Some of the forms of redirection for the C shell family are Character Action Redirect standard output Redirect standard dos redirect error output output and