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Bash Redirect Error Message To Variable


asked 4 years ago viewed 15242 times active 7 months ago Linked 28 Bash script - store stderr in variable 1 Output of a command not passing to assigned variable 88 exec 3>&- # Close fd 3. Daemontools /service/test/log: unable to open supervise/ok: file does not exist. 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 this contact form

ERROR=$( { ./useless.sh | sed s/Output/Useless/ > outfile; } 2>&1 ) Note that the semi-colon is needed (in classic shells - Bourne, Korn - for sure; probably in Bash too). Or are you capturing/redirecting it's output? You can capture stderr to variable and pass stdout to user screen (sample from here): exec 3>&1 # Save the place that stdout (1) points to. no outgoing connection via ipv4 Using Map to convert Feet + Inches to Inches in a List of Lists Video displays in Star Wars How would family relationships change if legal

Bash Redirect Stderr To Variable

The time now is 08:28 PM. - Contact Us - Unix & Linux - unix commands, linux commands, linux server, linux ubuntu, shell script, linux distros. - Advertising - Top Not the answer you're looking for? It is analogous to a file handle in C.

[3]Using file descriptor 5 might cause problems. Normalizing terminal prompt (or putty prompt) after catting a binary file.

  1. asked 8 months ago viewed 642 times active 5 months ago Related 4Redirect stderr of the double-parentheses construct3Why is it possible to refer to a closed stderr under bash?2redirecting std output
  2. printf "\n%s\n%d\n%d\n" \ "$stdout" "$(echo "$stdout" | wc -l)" "$exitcode" } 2>&1)" # extract the stderr, the stdout, and the exit code parts of the captured # output of command.
  3. Then: berr=$({ bout=$(banana); } 2>&1; declare -p bout >&2); declare -p berr will assign to berr the stderr of banana and display the content of berr with declare.
  4. Least Common Multiple Will the medium be able to last 100 years?
  5. This will let us know if our format_logs.py failed with some kind of python exception.
  6. This site is not affiliated with Linus Torvalds or The Open Group in any way.
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  9. As written, it would capture errors from sed too. (Formally untested code - use at own risk.) share|improve this answer edited May 31 '12 at 1:46 answered Jun 7 '09 at

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? My girlfriend has mentioned disowning her 14 y/o transgender daughter Now I know my ABCs, won't you come and golf with me? 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: Bash Redirect Error Output To File Using exec20.2.

It sets up a couple of extra file descriptors to manage the redirections needed in order to do this. #!/bin/bash exec 3>&1 4>&2 #set up extra file descriptors error=$( { ./useless.sh I've tested it: #!/bin/bash BLAH=$(( ( echo out >&1 echo err >&2 ) 1>log ) 2>&1) echo "BLAH=$BLAH" will print BLAH=err and the file log contains out. Applications

There are always three default files [1] open, stdin (the keyboard), stdout (the screen), and stderr (error messages output On THE other hand or on another hand?

e.g tapelist=$( command blah blah ) I then want to check if tapelist contains anything and run stuff otherwise dont i.e if [[ -n "{tapelist}" ]];then do stuff.... Bash Redirect Error Output To /dev/null bash shell redirect variables stderr share|improve this question edited Apr 4 '12 at 7:56 l0b0 19.5k660118 asked Jun 7 '09 at 16:38 psycotica0 6951711 3 What exactly to want to Finally stdout is redirected by being fed into a pipe, but this is not affecting file numbers 2 and 3 (notice that redirecting stdout from gzip is unrelated to the outputs 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

Bash Redirect To Variable Filename

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 / Arts Culture / Recreation Science Other I would like to do something like this inside of my bash script sh -c path/myExcecutable-bin 2>&1 =MYVARIABLE How do you send stderror output to a variable ? Bash Redirect Stderr To Variable asked 2 years ago viewed 22424 times active 1 year ago Related 3filename with no spaces from two command lines2How to pass lines from a file to a bash script, so Bash Redirect Output To Variable Password Home Search Forums Register Forum RulesMan PagesUnix Commands Linux Commands FAQ Members Today's Posts Shell Programming and Scripting Unix shell scripting - KSH, CSH, SH, BASH, PERL, PHP, SED, AWK

Why does Windows show "This device can perform faster" notification if I connect it clumsily? weblink In addition to the creation of a subshell, there is a subtle difference between these two constructs due to historical reasons. How to deal with a really persuasive character? I also know that I could do ./useless.sh 2> /tmp/Error ERROR=`cat /tmp/Error` but that's ugly and unnecessary. Bash Redirect Stdout To Variable

share|improve this answer edited Jun 28 '10 at 6:29 answered Jun 28 '10 at 6:19 Adam Crume 10.2k53547 I don't think this works. How to book a flight if my passport doesn't state my gender? I know i can create redirects to files as such: exec 4>/tmp/lava print "This will be saved to /tmp/lava and not screen"; >&4 print "This will be seen on screen" >&2 navigate here for just later reading it, to see what happens, you should use a file Remove advertisements Sponsored Links funksen View Public Profile Visit funksen's homepage!

In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms Bash Redirect Stdout And Stderr To Different Variables result=$1 shift # Name of shell variable to capture the stderr of command. Yes, of course I'm an adult!

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See my changes. –Tim Pote Jun 18 '12 at 17:08 add a comment| Not the answer you're looking for? 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. bash stderr share|improve this question edited Jun 18 '12 at 16:57 Tim Pote 13.4k23344 asked Jun 18 '12 at 16:55 stackoverflow 4,0212380143 marked as duplicate by tripleeebash Users with the bash Bash Check If Stderr Is Empty Thanks! –thornate Jun 28 '10 at 8:02 @AdamCrume how would i change this script so that in log file I will have both stderr & stdout ( out \n

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 To capture stdout to a file, just add a redirection at the end, for example: { error=$(ls /etc/passwd /etc/bad 2>&1 1>&$out); } {out}>&1 >output Breaking it down, reading from the outside cat *.txt | sort | uniq > result-file # Sorts the output of all the .txt files and deletes duplicate lines, # finally saves results to "result-file".his comment is here Convince people not to share their password with trusted others What are the holes on the sides of a computer case frame for?

ls -yz 2>&1 >> command.log # Outputs an error message, but does not write to file. # More precisely, the command output (in this case, null) #+ writes to the file, Why? The nominal way to execute the command ret=`eval ./segfault` is: Create a pipe. Edit: This really does work.