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Bash Redirect Error Message To Variable


Linux - Unable to login (and authentication succeeds) - File size limit exceeded. Linked 88 How to store standard error in a variable in a Bash script 15 Bash how do you capture stderr to a variable? 14 store return value of a Python share|improve this answer edited Jun 28 '10 at 6:58 answered Jun 28 '10 at 6:25 hlovdal 15.2k65399 add a comment| up vote 0 down vote dd writes both stdout and stderr: Realism of a setting with several sapient anthropomorphic animal species Why does Windows show "This device can perform faster" notification if I connect it clumsily? Check This Out

Why? To avoid clobbering files in the current directory, you want to use mktemp to create out.log and err.log in /tmp, and then delete them afterword. –Adam Crume Jul 16 '15 at However, this can be achieved by switching stdout and stderr and then teeing the new stdout (which is stderr now) back to stderr for console output. I've found solutions to redirect stderr to stdout, but I can't do that as the stdout is already being sent (via gzip) to a file.

Bash Redirect Stderr To Variable

Integral using residue theorem complex analysis Adopt A Jet/Book Should indoor ripened tomatoes be used for sauce? Good way to explain fundamental theorem of arithmetic? stderr is redirected to stdout, which is then redirected to a file.

Finally, we use a process substitution to source the content of these lines. Fork, i.e. How to handle spending money for extended trip to Europe? Bash Redirect Error Output To File So in my thoughts although i know this doesnt work :- savestderr=""; exec 3>${savestderr} tapelist=$(command blah blah 2>&3) Then can reference the error message as ${savestderr} Any ideas?

Change banana to: banana() { echo "banana to stdout" echo >&2 "banana to stderr" return 42 } We'll also have the return code of banana in the variable bret like so: Bash Redirect To Variable Filename The parentheses are operators, and are recognized as separate tokens by the shell even if they are not separated from the list by whitespace.The exit status of both of these constructs Sadly, I end up with a solution similar to Mr. If those answers do not fully address your question, please ask a new question.

Consider it a simplified type of file pointer. Bash Redirect Error Output To /dev/null Convince people not to share their password with trusted others What are the holes on the sides of a computer case frame for? I was basing my original answer on what it looked like the OP wanted to do, but that isn't necessarily what they actually wanted. In my example, the of commands is only "ls".Code:# ls file.txt nonexist.txtls: nonexist.txt: No such file or directoryfile.txtfile.txt exists and nonexist.txt doesn't.Following ERROR variable will take the value of the standard

Bash Redirect To Variable Filename

Guess i'm going down the file route Code: 2>${TMP}/$(basename $0).stderr Cheers lavascript View Public Profile Find all posts by lavascript

#4 04-17-2009 JerryHone Registered User exec 3>&1 stderr="$(command &1 1>&3)" exitcode="${?}" echo "STDERR: $stderr" exit ${exitcode} share|improve this answer answered Nov 28 '13 at 15:52 human9 111 add a comment| up vote 1 down vote Bash Redirect Stderr To Variable The most basic shell grouping construct, that does nothing but group, is braces. Bash Redirect Output To Variable A bit more background: I am running this a computer that has bash version 3.1.21. –John Mark Mitchell Apr 13 at 20:52 1 @JohnMarkMitchell You're using an antipattern here!

In other words: VAR=$((your-command-including-redirect) 2>&1) Since your command redirects stdout somewhere, it shouldn't interfere with stderr. his comment is here The trouble is that the process substitution is run in a sub-shell, so the value set in the sub-shell doesn't affect the parent shell. –Jonathan Leffler Dec 4 '14 at 20:21 See my changes. –Tim Pote Jun 18 '12 at 17:08 add a comment| Not the answer you're looking for? cat File # ==> 1234.67890 # Random access, by golly. | # Pipe. # General purpose process and command chaining tool. # Similar to ">", but more general in effect. Bash Redirect Stdout To Variable

The trouble here is that a is evaluated and assigned in a sub-shell, and the assignment in the sub-shell does not affect the parent shell. (Tested on Ubuntu 14.04 LTS as Finding a file starting with '-' dash more hot questions lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life Good way to explain fundamental theorem of arithmetic? http://sovidi.com/bash-redirect/bash-redirect-error-output-to-variable.php Does this syntax require Bash 4? –Stephen M.

Notice that I am using stdout for something. Bash Redirect Stdout And Stderr To Different Variables share|improve this answer answered Jun 8 '09 at 0:36 FD Gonthier add a comment| up vote 1 down vote Here's how I did it : # # $1 - name of My girlfriend has mentioned disowning her 14 y/o transgender daughter So sayeth the Shepherd Password Protected Wifi, page without HTTPS - why the data is send in clear text?

To redirect messages from the shell itself about the program, run the program inside a shell grouping construct, and redirect the output of the whole group.

Bash: Capturing stderr in a variable while still printing to the console. (2 votes) Loading... Posted on 31 January 2011 Sebastian Thomschke*/?> No comments Storing the stdout Based on this answer I'm using fd 3 to send extra information between two scripts, and capturing it from the calling script using { output=$(command 3>&1 1>&4-) ;} 4>&1 –Zim Mar Check the [About me] page for more details about my skills and experiences. Bash Check If Stderr Is Empty Is the empty set homeomorphic to itself?

UNIX is a registered trademark of The Open Group. There may be other ways to do this but this approach seems it will work, if it's actually possible. Subtraction with a negative result Is this safe to display MySQL query error in webpage if something went wrong? navigate here The redirection applies only to the program itself.