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Bash Redirect Error Message To Variable


exec 3<> File # Open "File" and assign fd 3 to it. How to change user login shell to bash in Linux. 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 share|improve this answer answered Jan 9 '14 at 20:09 jack 111 add a comment| up vote -1 down vote # NAME # capture - capture the stdout and stderr output of navigate here

Did Donald Trump call Alicia Machado "Miss Piggy" and "Miss Housekeeping"? I haven't quite gotten it to work yet. echo 1234567890 > File # Write string to "File". Since the list is executed in a subshell, variable assignments do not remain in effect after the subshell completes.{} { list; } Placing a list of commands between curly braces causes

Bash Redirect Stderr To Variable

Next, I tried to pass in a command via variable and have it working with ls "foo" but am having issues with ls "foo bar" -- note the space in the So, basically, I want to do ./useless.sh 2> $ERROR | ... Edit: Updated the command to redirect stderr from the mysqldump command and not gzip, I was too quick in my first answer. LOGFILE=script.log echo "This statement is sent to the log file, \"$LOGFILE\"." 1>$LOGFILE echo "This statement is appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This statement is also appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This

  1. There are three consecutive attempts.
  2. Do COB LEDs usually need electrically insulating from the heatsink?
  3. The '{}' does I/O redirection over the enclosed commands.
  4. Browse other questions tagged bash shell redirect variables stderr or ask your own question.
  5. What does Sauron need with mithril?
  6. It would be more efficient for process 1 to recycle itself.

How does the pilot control the Dassault Rafale? How to pluralize "State of the Union" without an additional noun? Yes, of course I'm an adult! 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?

Convince people not to share their password with trusted others Modern soldiers carry axes instead of combat knives. but that obviously doesn't work. A final redirection: { berr=$({ bout=$(banana); } 2>&1; declare -p bout >&2); declare -p berr; } 2>&1 will have the previous displayed via stdout. Adopt A Jet/Book How to extrude a face parallel to another?

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 Bash Redirect Error Output To /dev/null However, in the case of ret=`{ ./segfault; } 2>&1`, process 2 has its standard error redirected to file descriptor 1, but process 1 doesn't. Is the standard Canon 18-55 lens the same as 5 years ago? more hot questions question feed lang-bsh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Bash Redirect To Variable Filename

Can you think of a solution for this? Anyone have any better ideas? Bash Redirect Stderr To Variable add a comment| 4 Answers 4 active oldest votes up vote 43 down vote accepted Try redirecting stderr to stdout and using $() to capture that. Bash Redirect Output To Variable Meaning of Guns and ghee The Woz Monitor How to handle spending money for extended trip to Europe?

Redirecting Code Blocks20.3. check over here Join them; it only takes a minute: Sign up Bash script - store stderr in variable [duplicate] up vote 28 down vote favorite 9 This question already has an answer here: Is the empty set homeomorphic to itself? Thanks a lot @Networker! –Miguel Roque May 29 '14 at 7:52 add a comment| up vote 8 down vote Simply to store as a string in bash script: X=`/sbin/modprobe -n -v Bash Redirect Stdout To Variable

Why? I also know that I could do ./useless.sh 2> /tmp/Error ERROR=`cat /tmp/Error` but that's ugly and unnecessary. Is this safe to display MySQL query error in webpage if something went wrong? his comment is here If those answers do not fully address your question, please ask a new question.

Which requires more energy: walking 1 km or cycling 1 km at the same speed? Bash Redirect Stdout And Stderr To Different Variables I'm hoping there's another way. 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

IT, Linux bash, stderr, stdout Comments are closed.

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 If those answers do not fully address your question, please ask a new question. I could redirect stderr into stdout if I wanted to capture both. Bash Check If Stderr Is Empty echo -n . >&3 # Write a decimal point there.

My girlfriend has mentioned disowning her 14 y/o transgender daughter Intuition behind Harmonic Analysis in Analytic Number Theory How to make different social classes look quite different? I have the following line: mysqldump --user=$dbuser --password=$dbpswd \ --host=$host $mysqldb | gzip > $filename I want to assign the stderr to a variable, so that it will send an email Then: berr=$({ 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. weblink Why write an entire bash script in functions?

I think that this is because $() launches a sub process which no longer has access to the file descriptor in /dev/fd which is owned by the parent process. Language English Deutsch Categories IT (25) Development (15) Java (7) Jython (3) Visual Basic (5) Freeware Tips (1) Linux (3) WebSphere Portal (2) Windows (1) Wordpress (4) My Freeware (2) My I still want the standard output, and I want it to do other things, go other places. –psycotica0 Jun 7 '09 at 16:50 add a comment| up vote 2 down vote Convince people not to share their password with trusted others What to tell to a rejected candidate?

ls -lR > dir-tree.list # Creates a file containing a listing of the directory tree. : > filename # The > truncates file "filename" to zero length. # If file not The braces are reserved words, so they must be separated from the list by blanks or other shell metacharacters. ret=`{ ./segfault; } 2>&1` The form ret=`eval ./segfault 2>&1` applies the redirection to the whole evaluation of the eval command, so in principle it should work, and it does in fact After checking this, I know I won't make this mistake again. –Stephan Oct 11 '12 at 14:34 @Stephan cheers, this has also been discussed here. :) –Shadow Wizard Oct

share|improve this answer edited May 31 '12 at 5:25 answered May 31 '12 at 3:35 Barton Chittenden 2,66911334 1 If you did ./useless.sh 2> >( ERROR=$( cat <() ); echo A name for a well-informed person who is not believed?