Date: Tue, 14 Oct 1997 15:23:21 +0200 (MET DST) From: jhs@FreeBSD.ORG To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: gnu/4771: diff -c for src/gnu/usr.bin/tar/tar.c FreeBSD 2.2.2-RELEASE Message-ID: <199710141323.PAA20799@flip.jhs.no_domain> Resent-Message-ID: <199710151950.MAA19686@hub.freebsd.org>
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>Number: 4771
>Category: gnu
>Synopsis: diff to correct misleading total bytes info.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Wed Oct 15 12:50:01 PDT 1997
>Last-Modified:
>Originator: Julian Stacey <jhs@freebsd.org>
>Organization:
>Release: FreeBSD 2.2.2-RELEASE i386
>Environment:
FreeBSD 2.2.2-RELEASE i386
>Description:
Fix for misleading byte count info. from gnu tar.
>How-To-Repeat:
cd /usr/src/gnu/usr.bin/tar
patch -p5 < diff.jhs ; make ; make install
tar -c -f - --totals . | dd of=/dev/null
tar:Total bytes written: 952320
dd:1860+0 records in
dd:1860+0 records out
dd:952320 bytes transferred in 0.054882 secs (17352122 bytes/sec)
tar -z -c -f - --totals . | dd of=/dev/null
tar:Total bytes written: 952320
dd:671+1 records in
dd:671+1 records out
dd:343978 bytes transferred in 3.607535 secs (95350 bytes/sec)
One can see the truth from dd, but tar itself lies to us.
My diff changes
tar:Total bytes written: 952320
to
tar:Total bytes written (to compressor, not to media): 952320
Why I bother to fix it:
On another occasion it said ~550M to me when it
had really only written ~250M to my tape, as my qic-525 only takes
about 540M i thought I'd hit end of tape, not so,
gnu tar just misleads us about how much its proxy gzip is writing.
>Fix:
I'm too busy to change the the code, to count bytes written out
from the compressor (I suspect that would be very hard, pipes'nall
& anyway it's a 3rd party gnu product.
My patch below corrects the information label returned by the command.
Appropriate for FreeBSD 2.2.2-RELEASE
*** old/src/gnu/usr.bin/tar/tar.c Tue Jan 7 11:44:53 1997
--- new/src/gnu/usr.bin/tar/tar.c Tue Oct 14 14:35:12 1997
***************
*** 230,236 ****
case CMD_CREATE:
create_archive ();
if (f_totals)
! fprintf (stderr, "Total bytes written: %d\n", tot_written);
break;
case CMD_EXTRACT:
if (f_volhdr)
--- 230,240 ----
case CMD_CREATE:
create_archive ();
if (f_totals)
! fprintf (stderr, "Total bytes written%s: %d\n",
! (f_compressprog) ?
! " (to compressor, not to media)"
! : "" ,
! tot_written);
break;
case CMD_EXTRACT:
if (f_volhdr)
Julian
--
Julian H. Stacey
Home <jhs@freebsd.org> http://www.freebsd.org/~jhs/ Tel. +49 89 268616
>Audit-Trail:
>Unformatted:
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