On Thu, Feb 4, 2010 at 11:32 PM, Stephen Powell <zlinux...@wowway.com> wrote: > On Thu, 4 Feb 2010 17:09:28 -0500 (EST), Dotan Cohen wrote: >> I'm scripting a backup solution, the line that does the business looks >> like this: >> >> tar -zcvf - * --exclude-from $EXCLUDES | openssl des3 -salt -k $1 | >> dd of=$(hostname)-$(date +%Y%m%d).tbz >> >> Because of the "v" flag tar writes to stdout the name of each file >> copied. How can I get that output redirected to a variable, to use >> later in the script? > > First of all, let me preface my remarks by saying that I am just > learning shell scripting myself and definitely consider myself a > novice. Some guru out there may (and probably does) know a better > way. > > Using a variable is problematic, since a pipeline runs in a subshell > environment. In fact, each stage of the pipeline is a separate > process. Thus, any variables set in a pipeline stage do not > affect the values of the corresponding variable names in the shell > environment that invoked the pipeline. > > How about something like this? > > tar -zcvf - * --exclude-from $EXCLUDES | tee /tmp/data$$ | \ > openssl ... In this case output goes to stderr, so:
tar -zcvf - * --exclude-from $EXCLUDES 2> /tmp/data$$ | openssl ... > . > . logic to process the /tmp/data$$ data file > . > rm /tmp/data$$ > > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
