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good explanation, I'd like to make a function on C that redirects STDIN and SDTOUT to an script, how can I do that, I mean, the exist a library's on C Not the answer you're looking for? for real loggin better way is: exec 1>>$LOG_FILE it cause log is allways appended. –Znik Dec 8 '14 at 9:43 2 That's true although it depends on intentions. BASH Shell: How To Redirect stderr To stdout ( redirect stderr to a File ) by Vivek Gite on March 12, 2008 last updated March 12, 2008 in BASH Shell, Linux, Source

Note: The order matters as liw.fi pointed out, 2>&1 1>file.log doesn't work. It will make STDERR point to STDOUT and then change STDOUT to something else (without touching STDERR) Here is a more detailed tutorial covering both those misconceptions http://wiki.bash-hackers.org/howto/redirection_tutorial Reply Link iek How to draw and store a Zelda-like map in custom game engine? Problem of display in tikz When a girl mentions her girlfriend, does she mean it like lesbian girlfriend?

Redirect Stderr To Dev Null

Redirecting Code Blocks > >20.3. In the hopes that this information is helpful to others, I'm posting it here. Subscribed!

Why were Native American code talkers used during WW2? What to do with my pre-teen daughter who has been out of control since a severe accident? (Seemingly) simple trigonometry problem Save a JPG without a background Forgotten Lost Highway (New But are the semantic rules documented anywhere because I reckon this is something worthwhile to learn as it could waste hours. –igbgotiz Jul 14 '14 at 22:09 7 @igbgotiz 2>&1 Tcsh Redirect Stderr Disproving Euler proposition by brute force in C What's the point of Pauli's Exclusion Principle if time and space are continuous?

Are there any pan-social laws? Bash Redirect Stdout And Stderr To Dev Null see more linked questions… Related 743How can I redirect and append both stdout and stderr to a file with Bash?552How to pipe stderr, and not stdout?7redirect stdout and stderr to a How do I redirect stderr to stdout? http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-3.html Faria 4061718 add a comment| 1 Answer 1 active oldest votes up vote 16 down vote accepted There are two main output streams in Linux (and other OSs), standard output (stdout)and

Rankin Sep 2 '14 at 2:04 1 Earlier comments are no longer relevant because the answer has fundamentally changed (for the better). Redirect Stderr To Stdout Windows ls -l 2>&1 >&3 3>&- | grep bad 3>&- # Close fd 3 for 'grep' (but not 'ls'). # ^^^^ ^^^^ exec 3>&- # Now close it for the remainder of What is way to eat rice with hands in front of westerners such that it doesn't appear to be yucky? What's a Racist Word™?

Bash Redirect Stdout And Stderr To Dev Null

Hot Network Questions Print some JSON "Guard the sense doors"- What does this mean, and what is it's application? 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: Redirect Stderr To Dev Null share|improve this answer edited Jun 26 '13 at 7:49 l0b0 17.6k1069145 answered Jun 25 '13 at 19:22 rici 6,0881725 1 Indeed, i read the bourn shell manual. Bash Redirect Stderr To Dev Null Logical && statement with null validation Does bitcoin have the potential to be subject to a hard fork where miners are forced to choose which fork they will accept, like Etherum?

normal redirection is not working1Can't redirect standard output0How to redirect all manuals to files?1printf, redirection, crontab0What goes on underneath error redirection?-1how to use output redirection to demonstrate what TREE does1Redirecting apt-get this contact form The man page does specify a preference for '&>' over '>&', which is otherwise equivalent. –chepner Jul 16 '12 at 20:45 6 I guess we should not use &> as So stderr goes to the stdout and that goes to the file. ERRORFILE=script.errors bad_command1 2>$ERRORFILE # Error message sent to $ERRORFILE. Ambiguous Output Redirect

share|improve this answer edited Oct 27 '15 at 10:33 rubenvb 42k13103190 answered Mar 12 '09 at 9:16 Marko 18k126099 3 I was searching SO for how to do this with Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the cp: error reading ‘/mnt/tt/file.txt’: Input/output error cp: failed to extend ‘/mnt/tt/file.txt’: Input/output error I want to save that content to a file. http://supercgis.com/redirect-stderr/redirect-standard-error-to-standard-out-batch.html For opening additional files, there remain descriptors 3 to 9.

This functionality is provided by 'tee' command which can write/append to several file descriptors(files, sockets, pipes, etc) at once: tee FILE1 FILE2 ... >(cmd1) >(cmd2) ... Redirect Standard Error To File In Unix more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Put '2>&1' after '>file.log' and it works. –user25148 Mar 12 '09 at 9:25 1 Good point, I seem to have been doing this wrong all these years...

Consider it a simplified type of file pointer.

Browse other questions tagged linux bash or ask your own question. It is sometimes useful to assign one of these additional file descriptors to stdin, stdout, or stderr as a temporary duplicate link. [3] This simplifies restoration Changing STDOUT after STDERR had been redirected to STDOUT won't change STDERR. Redirect All Output To File bad_command2 2>>$ERRORFILE # Error message appended to $ERRORFILE.

You can also use 1 instead of 2 so that stdout gets redirected to the 'file' share|improve this answer answered Sep 24 '11 at 5:53 PaulDaviesC 512922 add a comment| Your Unix & Linux Stack Exchange works best with JavaScript enabled cat File # ==> 1234.67890 # Random access, by golly. | # Pipe. # General purpose process and command chaining tool. # Similar to ">", but more general in effect. Check This Out up vote 102 down vote Anders Lindahl's answer is correct, but it should be noted that if you are redirecting stdout to a file and want to redirect stderr as well

In order to redirect STDERR you have to specify "2>" for the redirection symbol. To redirect stderr as well, you have a few choices: Redirect stderr to another file: command > out 2>error Redirect stderr to stdout (&1), and then redirect stdout to a file: exec 3<> File # Open "File" and assign fd 3 to it.