5. Korištenje bzip2 uz tar

Evo tri načina korištenja bzip2 uz tar, to jest:

5.1 Najlakši za namještanje

Ova metoda ne zahtijeva nikakvo petljanje. Za dearhiviranje bzip2-ane tar arhive, foo.tar.bz2, u trenutnom direktoriju, napišite

/staza/do/bzip2 -cd foo.tar.bz2 | tar xf -

5.2 Lagan za namještanje, relativno lagan za korištenje, bez potrebe za root privilegijama

Hvala Leonardu Jean-Marcu, leonard@sct1.is.belgacom.be, što mi je ovo spomenuo. Također hvala Alessandru Rubiniju, rubini@morgana.systemy.it, za razlike između basha i csha.

U svoj .bashrc možete staviti ovakav red:

alias btar='tar --use-compress-program /usr/local/bin/bzip2 '

U .tcshrc ili .cshrc odgovarajući red izgleda ovako:

alias btar 'tar --use-compress-program /usr/local/bin/bzip2'

5.3 Isto tako lak za korištenje, ali zahtijeva root pristup

Slijedeću zakrpu ovako primjenite na GNU tar 1.12:

cd tar-1.12/src; patch < /staza/do/tar.diff

tar xyf foo.tar.bz2

Stvaranje nove arhive je slično:

tar cyf foo.tar.bz2 datoteka1 datoteka2... direktorij1 direktorij2...

Evo zakrpe:

*** tar.c       Thu Jun 11 00:09:23 1998
--- tar.c.new   Thu Jun 11 00:14:24 1998
***************
*** 196,201 ****
--- 196,203 ----
    {"block-number", no_argument, NULL, 'R'},
    {"block-size", required_argument, NULL, OBSOLETE_BLOCKING_FACTOR},
    {"blocking-factor", required_argument, NULL, 'b'},
+   {"bzip2", required_argument, NULL, 'y'},
+   {"bunzip2", required_argument, NULL, 'y'},
    {"catenate", no_argument, NULL, 'A'},
    {"checkpoint", no_argument, &checkpoint_option, 1},
    {"compare", no_argument, NULL, 'd'},
***************
*** 372,377 ****
--- 374,380 ----
                PATTERN                at list/extract time, a globbing PATTERN\n\
    -o, --old-archive, --portability   write a V7 format archive\n\
        --posix                        write a POSIX conformant archive\n\
+   -y, --bzip2, --bunzip2             filter the archive through bzip2\n\
    -z, --gzip, --ungzip               filter the archive through gzip\n\
    -Z, --compress, --uncompress       filter the archive through compress\n\
        --use-compress-program=PROG    filter through PROG (must accept -d)\n"),
***************
*** 448,454 ****
     Y  per-block gzip compression */
  
  #define OPTION_STRING \
!   "-01234567ABC:F:GK:L:MN:OPRST:UV:WX:Zb:cdf:g:hiklmoprstuvwxz"
  
  static void
  set_subcommand_option (enum subcommand subcommand)
--- 451,457 ----
     Y  per-block gzip compression */
  
  #define OPTION_STRING \
!   "-01234567ABC:F:GK:L:MN:OPRST:UV:WX:Zb:cdf:g:hiklmoprstuvwxyz"
  
  static void
  set_subcommand_option (enum subcommand subcommand)
***************
*** 805,810 ****
--- 808,817 ----
        case 'X':
        exclude_option = 1;
        add_exclude_file (optarg);
+       break;
+ 
+       case 'y':
+       set_use_compress_program_option ("bzip2");
        break;
  
        case 'z':