Bash Capture Error Output
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Bash Redirect Error Output To /dev/null
has an answer here: Bash script - store stderr in variable [duplicate] 4 answers Bash how do you capture stderr to a variable? 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 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 bash capture stderr and stdout as duplicate by tripleeebash Users with the bash badge can single-handedly close bash questions as duplicates and reopen them as needed. Mar 14 at 6:56 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 2 This StackOverflow thread should answer your question. –Web User Jun 18 '12 at 16:57 See one of the many related threads, and several solutions –ormaaj Jun 18 '12 at 17:01 add a comment| 1 Answer 1 active oldest votes up vote 33 down vote accepted To save both stdin and stderr to a variable: MYVARIABLE="$(path/myExcecutable-bin 2>&1)" To save just stderr to a variable: MYVARIABLE="$(path/myExcecutable-bin 2>&1 > /dev/null)" share|improve this answer edited Jun 18 '12 at 17:06 answered Jun 18 '12 at 16:56 Tim Pote 13.4k23344 4 I just want to note that you will save both stderr and stdout to the variable. When you need only stderr use 2>&1 >/dev/null –Igor Chubin Jun 18 '12 at 16:59 @IgorChubin Good point. 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. See my changes. –Tim Pote Jun 18 '12 at 17:08 add a comment| Not the answer you're
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Bash Pipe Stderr
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Bash Redirect Stderr And Stdout To Same File
like you, helping each other. Join them; it only takes a minute: Sign up capture both stdout and stderr in bash [duplicate] up vote 16 down vote favorite 10 This question already has an answer here: Store / http://stackoverflow.com/questions/11087499/bash-how-do-you-capture-stderr-to-a-variable Capture stdout and stderr in different variables (bash) 10 answers I know this syntax var=`myscript.sh` or var=$(myscript.sh) Will capture the result (stdout) of myscript.sh into var. I could redirect stderr into stdout if I wanted to capture both. How to save each of them to separate variables? My use case here is if the return code is nonzero I want to echo stderr and suppress otherwise. There may be other ways to do this but http://stackoverflow.com/questions/13806626/capture-both-stdout-and-stderr-in-bash this approach seems it will work, if it's actually possible. bash stream pipe stdout stderr share|improve this question edited Nov 9 '14 at 10:43 gniourf_gniourf 20.5k43759 asked Dec 10 '12 at 18:08 djechlin 31k1575164 marked as duplicate by Jonathan Lefflerbash Users with the bash badge can single-handedly close bash questions as duplicates and reopen them as needed. Jul 31 '15 at 3:50 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. ah , there is no way to capture both without temp file, see my answer here which show how to get stderr and pass stdout to the screen (in case of dialog): stackoverflow.com/a/13427218/815386 –zb' Dec 10 '12 at 18:16 here is additional info mywiki.wooledge.org/BashFAQ/002 What you cannot do is capture stdout in one variable, and stderr in another, using only FD redirections. You must use a temporary file (or a named pipe) to achieve that one. –zb' Dec 10 '12 at 18:17 is there some specific reason why you don't want to use temp files? Using temp files is very much idiomatic within a bash programming environment –frankc Dec 10 '12 at 18:54 Related (and having a pretty easy solution): Bash script - store stderr in variable –Izz
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://unix.stackexchange.com/questions/132511/how-to-capture-error-message-from-executed-command workings and policies of this site About Us Learn more about Stack http://unix.stackexchange.com/questions/255861/redirecting-standard-error-output-to-bash-variable Overflow the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; error output 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 top How to capture error message from executed command? up vote 5 down vote favorite 1 I was tasked to create an automated server hardening script and one thing that they need error output to is a report of all the output of each command executed. I want to store the error message inside a string and append it in a text file. Let's say I ran this command: /sbin/modprobe -n -v hfsplus The output of running this in my machine would be: FATAL: Module hfsplus not found How can I store that error message inside a string? Any help would be greatly appreciated. Thanks! bash scripting string share|improve this question asked May 29 '14 at 7:25 Miguel Roque 1172412 I tried running this command: var=$(/sbin/modprobe -n -v hfsplush) And then displaying it: $var But it still doesn't capture the error message inside the string. –Miguel Roque May 29 '14 at 7:42 add a comment| 4 Answers 4 active oldest votes up vote 10 down vote you can do it by redirecting errors command: /sbin/modprobe -n -v hfsplus 2> fileName as a script #!/bin/bash errormessage=$( /sbin/modprobe -n -v hfsplus 2> &1) echo $errormessage or #!/bin/bash errormessage=`/sbin/modprobe -n -v hfsplus 2> &1 ` echo $errormessage if you want to append the error use >> instea
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 About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. 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 top Redirecting standard error output to bash variable up vote 7 down vote favorite 1 Here's a C code snippet that will cause segfault: // segfault.c #include