On 24/11/10 16:34, Pádraig Brady wrote: > On 23/11/10 16:34, Pádraig Brady wrote: >> On 23/11/10 16:24, Stefan Tomanek wrote: >>> Dies schrieb Stefan Tomanek (stefan.toma...@wertarbyte.de): >>> >>>> It is often convinient to detect whether head has in fact printed the >>>> requested number of lines or if EOF was reached before reaching that >>>> point. This patch adds the option --indicate-underrun, which makes >>>> "head" exit with a status of 4 instead of 0 if no more data could be >>>> read from its input. >>> >>> Any thoughts about this change? It's a rather small patch, but would >>> be quite useful (at least for me).
Note the above use case is now supported with `split --filter` http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commit;h=a09d9e5b (Note currently the number of chunks is limited by --suffix-length). > The following addresses both issues and > also uses existing coreutils functionality: > > process_part() { echo processing $(wc -c) bytes; } > while true; do > c=$(od -tx1 -An -N1) > test "$c" || break > c=$(echo $c) #strip leading ' ' > { printf "\x$c"; head -c9; } | process_part > done BTW I previously created a script with the above, since it seems so useful. So you can use this for older systems: https://github.com/pixelb/scripts/commits/master/scripts/split_to cheers, Pádraig.
