RaptorX wrote:
> Hi guys,
>
> This is my first time building LFS 6.4, im in chapter 5.4.1 at the moment
> and I wanted to run the benchmark with the time command...
You have to understand how bash parses the command line. It separates reserved
words by whitespace and separates commands by semi-colons.
The reserved words are
! case do done elif else esac fi for function if in select then until while {
}
time [[ ]]
Some of these are overloaded. That is, there is a difference between { } and
${xxx}, just like there is a difference between
'!12' and '! expression'
The syntax of time is basically:
time command
where command can be a compound command:
{ list; }
list is simply executed in the current shell environment.
list must be terminated with a newline or semicolon.
This is known as a group command. The return status is the exit
status of list. Note that unlike the metacharacters
( and ), { and } are reserved words and must occur where a reserved
word is permitted to be recognized. Since they do not cause a
word break, they must be separated from list by whitespace.
So you can use:
time { ls; ls -l; }
and it will work.
The sequence I use for the book is basically:
{ time \
{
echo Making $TITLE
date
./configure --prefix=/usr &&
make &&
make DESTDIR=$DEST install
}
} 2>&1 | tee -a $LOG
Note that the newlines can be replaced with semi-colons except the time command
itself requires an argument, hence the escape at the first line.
Hope this helps.
-- Bruce
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