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Re: Bash scripting and large files: input with the read builtin from a r
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From: |
Jonathan Nieder |
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Subject: |
Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB. |
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Date: |
Sun, 4 Mar 2012 13:52:35 -0600 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hi Chet,
Chet Ramey wrote:
> Compile and run the attached program. If it prints out `4', which it does
> on all of the Debian systems I've tried, file offsets are limited to 32
> bits, and accessing files greater than 2 GB is going to be unreliable.
off_t is typedef'd to off64_t if you compile with -D_FILE_OFFSET_BITS=64.
The AC_SYS_LARGEFILE autoconf macro is supposed to cause bash to be
built with -D_FILE_OFFSET_BITS=64 (and seems to work that way here,
based on the result of "eu-readelf -s /bin/bash | grep open").
Jean-François is using a 64-bit architecture, where _FILE_OFFSET_BITS=64
is the default, anyway.
So I fear the problem is somewhere else. (Maybe an "int" is used as an
offset somewhere.)
Hope that helps,
Jonathan
- Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Jean-François Gagné, 2012/03/03
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Chet Ramey, 2012/03/04
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB.,
Jonathan Nieder <=
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Bob Proulx, 2012/03/04
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Andreas Schwab, 2012/03/04
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Chet Ramey, 2012/03/04
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Chet Ramey, 2012/03/04
- Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Andreas Schwab, 2012/03/04
- Re : Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Jean-François Gagné, 2012/03/06
- Re : Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Jean-François Gagné, 2012/03/08
Re: Bash scripting and large files: input with the read builtin from a redirection gives unexpected result with files larger than 2GB., Chet Ramey, 2012/03/04