Re: Growisofs input cache (get away from dd?)
>>>> source code: growisofs -Z /dev/cdrom=/dev/fd/0 < image.iso. Ta-dah...
> David Weisgerber:
>> I think that using the pipe will create another buffer
>> which I want to avoid.
> This is not a pipe. It is an inherited file
> man bash says:
> Redirecting Input
> Redirection of input causes the file whose name results from the expan-
> sion of word to be opened for reading on file descriptor n, or the
> standard input (file descriptor 0) if n is not specified.
> The general format for redirecting input is:
Right. One can also do
exec 3 < image.iso
growisofs -Z /dev/cdrom1=/dev/fd/3 &
growisofs -Z /dev/cdrom2=/dev/fd/3 &
and whatever equivalent in C, i.e. open once, pass to many. It is *as
good* as letting growisofs open it. Actually *better*, because it's not
subject to race condition. You only have to make sure that the file is
opened with O_LARGEFILE or with open64. Some script interpretators might
fail to. A.