lkml.org 
[lkml]   [2001]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: What is the difference between 'login: root' and 'su -' ?
Hello,
in both cases file descriptor 4 is from 'open("/dev/hdc4", O_RDWR) = 4' ....
Peter

On Thu, Nov 08, 2001 at 08:10:07AM +0200, Ville Herva wrote:
> On Wed, Nov 07, 2001 at 11:40:25PM +0100, you [Peter Seiderer] claimed:
> > Mhhh,
> > the strace output from the 'login: root' one (the one which was good)
> > looks the same till the EFBIG place:
> >
> > write(1, "\10\10\10\10\10", 5) = 5
> > write(1, "16/44", 5) = 5
> > _llseek(4, 18446744071562084352, [2147500032], SEEK_SET) = 0
> > write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
> > _llseek(4, 18446744071562117120, [2147532800], SEEK_SET) = 0
> > write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
> > _llseek(4, 18446744071562149888, [2147565568], SEEK_SET) = 0
> > write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
> > _llseek(4, 18446744071562182656, [2147598336], SEEK_SET) = 0
> > write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = 32768
>
> Weird. Perhaps strace gets that wrong and the problem is elsewhere.
>
> Did you make sure that fd 4 is the same _partition_ in both cases (using
> strace)? The only thing I could imagine exposing 2GB limit is writing to a
> file.
>
> > > > zodiak login: seiderer
> > > > Password:
> > > > seiderer@zodiak:~ > su -
> > > > Password:
> > > > zodiak:~ #
> > > > zodiak:~ # mkfs.ext2 /dev/hdc4
> > > > mke2fs 1.18, 11-Nov-1999 for EXT2 FS 0.5b, 95/08/09
> > > > Filesystem label=
> > > > OS type: Linux
> > > > Block size=4096 (log=2)
> > > > Fragment size=4096 (log=2)
> > > > 716672 inodes, 1432116 blocks
> > > > 71605 blocks (5.00%) reserved for the super user
> > > > First data block=0
> > > > 44 block groups
> > > > 32768 blocks per group, 32768 fragments per group
> > > > 16288 inodes per group
> > > > Superblock backups stored on blocks:
> > > > 32768, 98304, 163840, 229376, 294912, 819200, 884736
> > > >
> > > > Writing inode tables: 16/44File size limit exceeded
> > > >
> > > > strace showed that write returned wit EFBIG and the process ended with SIGXFSZ:
> > > >
> > > > write(1, "\10\10\10\10\10", 5) = 5
> > > > write(1, "16/44", 5) = 5
> > > > _llseek(4, 18446744071562084352, [2147500032], SEEK_SET) = 0
> > > > write(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768) = -1 EFBIG (File too large)
> > > > --- SIGXFSZ (File size limit exceeded) ---
> > > > +++ killed by SIGXFSZ +++
> > >
> > > Hmm, 18446744071562084352 = 0xffffffff80004000, 2147500032 = 0x80004000...
> > > It looks a tad like llseek's offset_high would have been corrupted...
> > > Strange.
> > >
> > > 1432116 blocks * 4096 bytes/block * 16/44 written = 2133071685.81818 so
> > > 2147500032 looks sane(ish).
>
> -- v --
>
> v@iki.fi

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:13    [W:0.090 / U:0.844 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site