Hello, I was looking for an oss-bit-size bug/RFE to work on, and saw this one :
*tar* tar needs 'z' functionality http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6267081 The basic idea is to implement -z (and why not -j) options to tar, like gnu-tar does. I had a look at tar.c, and it seems the modifications needed are a bit more complicated than usual oss-bit-size bugs/RFE, at least to me, but that's an interesting task and I think it'd be usefull. I don't know yet how this should be done, but I thought it could be to rewrite all file related syscalls (read,write,fseek ...). read() could be replaced by, say, Read(), which is a function that can read directly into bz2 or gzip files. Thus the changes in the actuel code would be minimal (replacing some syscalls by new function names), and we'd just need to add a few functions. I think that may work fine quite easily (but I may be wrong), at least for files located on disks (tar must work with tapes, and I don't know if writting/reading tapes requires specific knowledge). I then wondered if it could be usefull to have this kind of functions for something else. I guess yes, and then why not having library functions that'd do that ? Reading/writting directly into bzip2 or gzip files like we do for "normal" files may be nice. bz2_read(/* same args than read*/) bz2_fseek(...) bz2_write(...) gzip_read(...) .... Are there already such lib functions ? Maybe it sounds a bit like having compression into ZFS, or Hurd's translators ? This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
