I have a bash script sometimes called by another script and sometimes run
from the command line. I would like standard output (and error) to go to
the screen if I run the script from the keyboard and to a nominated file
if I call it from another script.
I tried the following
if [ "$1" = "quiet" ]; then
R=">> /home/steven/mfgbacker/serr 2>&1"
else
R=""
fi
[...snip...]
DTEN=`date "+%Y.%m.%d %H:%M:%S"`
echo "inside makedvd $DTEN" $R
I=`mkisofs -R -J -q -print-size /back1/tarback/*.tgz`
J="tsize=${I}s"
mkisofs -R -J -q -o /back1/tarback/dvd.iso /back1/tarback/*.tgz $R
cdrecord -sao $J dev=ATAPI:0,0,0 speed=2 driveropts=burnfree
/back1/tarback/dvd.iso $R
[...snip...]
The $J substitution into the last command works fine but the $R bit, which
attempts to redirect the output to a file, does not. Bash seems to
interpret the >> bit as part of the command rather than a redirection
instruction.
I am not sure if this is possible in bash or not. There are lots of other
commands in the script which also redirect so I would rather not do
something like:
if ["$1" = "quiet"]; then
mkisofs -R -J -q -o /back1/tarback/dvd.iso /back1/tarback/*.tgz >>
/home/steven/mfgbacker/serr 2>>1
else
mkisofs -R -J -q -o /back1/tarback/dvd.iso /back1/tarback/*.tgz
fi
because I would have to do it many times.
I think the problem is something to do with when bash is processing the
substitution. I have tried various combinations of different quotes
without success.
Could someone please point me in the right direction
Thank you and regards
Steven
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