Your message dated Sat, 14 Feb 2015 08:03:35 +0300
with message-id <[email protected]>
and subject line Bug#760985: fixed in strace 4.8-1
has caused the Debian Bug report #760985,
regarding strace: can fail with "command not found" because stat() returns
EOVERFLOW on 64-bit inode numbers
to be marked as done.
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Bug report if necessary, and/or fix the problem forthwith.
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--
760985: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760985
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: strace
Version: 4.5.20-2.3
On 32-bit systems, strace is not compiled with -D_FILE_OFFSET_BITS=64
(and the essential message of this bug-report is that ALL programs
that use stat() in any way whatsoever should always be compiled with
this define).
As a result, stat() can fail with EOVERFLOW for the absurd reason that
the inode number of the stat()ed file is greater than (1<<31)-1.
This occurs, in particular, on XFS filesystems of over 1TB in size
(when using 256-byte inodes), according to <URL:
http://xfs.org/docs/xfsdocs-xml-dev/XFS_User_Guide/tmp/en-US/html/ch06s06.html
>. Under these circumstances (when running a 32-bit userland on a
64-bit Linux kernel), strace will, for certain files, fail with the
error message "command not found" even though the file exists, simply
because the st_ino field of the stat result structure cannot be
represented in the 32-bit API.
This is not a purely theoretical fear: I just spent a considerable
time pulling my hair trying to understand why strace was telling me a
file did not exist when evidently it did.
Solution: compile strace with -D_FILE_OFFSET_BITS=64 so as to make
ino_t 64-bit wide. The same argument applies to every program that
makes use of stat() at some point. (I think this should be a Debian
policy of some kind, but I don't know where these should be submitted.
Please enlighten me.)
--
David A. Madore
( http://www.madore.org/~david/ )
--- End Message ---
--- Begin Message ---
Source: strace
Source-Version: 4.8-1
--- End Message ---
