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Bash Script Redirect Error To Variable


So, basically, I want to do ./useless.sh 2> $ERROR | ... How to deal with a very weak student? BTW setting IFS='' did not work. –John Mark Mitchell Apr 13 at 19:53 @gniourf_gniourf The article Bash: Preserving Whitespace Using set and eval has me wondering if whitespace preservation Should indoor ripened tomatoes be used for sauce? this contact form

Well, then first you have to decide where you do want stdout to go: 1 output=$(command 2>&1 >/dev/null) # Save stderr, discard stdout. 2 output=$(command 2>&1 >/dev/tty) # Save stderr, send What the script writes to FD 1 (normally stdout) will be written to stderr because of the first and third redirections. This helps me implement a dry_run function that can reliably choose between echoing its arguments and running them, regardless of whether the command being dry-ran is being piped to some other Yes, of course I'm an adult!

Bash Backticks Stderr

Notice that I am using stdout for something. Well, even if the idea below cannot be made working (which I assume), it may serve as an anti-example for people who may falsely believe it could be made working like Join them; it only takes a minute: Sign up Bash how do you capture stderr to a variable? [duplicate] up vote 15 down vote favorite 5 This question already has an

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! What does the "Phi" sign stand for in musical notation? bash io-redirection stdout brace-expansion share|improve this question edited May 7 '12 at 21:28 Stefan Lasiewski 5,930154770 asked Jan 10 '12 at 9:26 rush 15.5k34483 add a comment| 4 Answers 4 active Bash Script Redirect Stderr To Dev Null Were slings used for throwing hand grenades?

Problem with using pause and onslide in one frame How to extrude a face parallel to another? Bash Script Redirect Output To Variable command < input-file > output-file # Or the equivalent: < input-file command > output-file # Although this is non-standard. The redirection applies only to the program itself. asked 6 years ago viewed 31530 times active 5 years ago Visit Chat Linked 88 How to store standard error in a variable in a Bash script 15 Bash how do

We have "swapped" FD 1 and FD 2. 3>&- /dev/tty /dev/tty pipe Finally, we close FD 3 as it is no longer necessary. Bash Redirect Append I mistakenly apply this same rule with english answers. Skeletal formula for carbon with two double bonds more hot questions question feed lang-bsh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us But I need some output even in non-verbose mode, therefore I can't just redirect whole stdout and stderr, only from some commands inside of my script.

Bash Script Redirect Output To Variable

Thanks. –psycotica0 Jun 11 '09 at 21:20 3 If you don't need the standard output, you can redirect it to /dev/null instead of outfile (If you're like me, you found Intuition behind Harmonic Analysis in Analytic Number Theory How to handle spending money for extended trip to Europe? Bash Backticks Stderr Now I know my ABCs, won't you come and golf with me? Bash Script Redirect Output To File And Screen 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

Why are some programming languages Turing complete but lack some abilities of other languages? weblink It's not directly an answer to the question, but I came here with the same question and I think that, long-term, I'm going to switch to a shell based on a Then 2>&3 redirects stderr to file number 3, which now is the same as stdout. 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. Bash Script Redirect Output To Null

Is it possible to check for existence of member template just by identifier? A final redirection: { berr=$({ bout=$(banana); } 2>&1; declare -p bout >&2); declare -p berr; } 2>&1 will have the previous displayed via stdout. At this point, you'll have on your terminal screen: declare -- bout="banana to stdout" declare -- berr="banana to stderr" with the line declare -- bout="banana to stdout" being displayed via stderr. navigate here 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

I accepted a counter offer and regret it: can I go back and contact the previous company? Bash Capture Stderr To Variable When the pipe is closed, continue execution. but that obviously doesn't work.

Not sure why, but > >() seems to work reliably.

I don't think there's an easy way to do it. What does an 'ü' mean? just like before. Bash Save Stderr To Variable Why write an entire bash script in functions?

Browse other questions tagged bash shell command-line io-redirection or ask your own question. 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. Is this safe to display MySQL query error in webpage if something went wrong? his comment is here When you need only stderr use 2>&1 >/dev/null –Igor Chubin Jun 18 '12 at 16:59 @IgorChubin Good point.

ERRORFILE=script.errors bad_command1 2>$ERRORFILE # Error message sent to $ERRORFILE. What does an 'ü' mean? Unfortunately, if no answers turn up here that's what I'm going to have to do. function out { echo stdout echo stderr >&2 } x=${ { y=$(out); } 2>&1; } typeset -p x y # Show the values produces x=stderr y=stdout The ${ cmds;} syntax is