Re: [tbox-l] unzip 5.51 and large files

[Philip K W. <pk...@us...>]

While the unzip command on AIX is built with support for large files, it 
seems that it doesn't necessarily support >2gb zip files created with 
pkzip. Here is a section from the Info-Zip FAQ:

"Also note that in August 2001, PKWARE released PKZIP 4.50 with support 
for large files and archives via a pair of new header types, "PK\x06\x06" 
and "PK\x06\x07". So far these headers are undocumented, but most of their 
fields are fairly obvious. We don't yet know when Zip and UnZip will 
support this extension to the format. In the short term, it is possible to 
improve Zip and UnZip's capabilities slightly on certain Linux systems 
(and probably other Unix-like systems) by recompiling with the 
-DLARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 options. This will allow the 
utilities to handle uncompressed data files greater than 2 GB in size, as 
long as the total size of the archive containing them is less than 2 GB. 
(The operating system also must have support for large files; for Linux, 
this involves the kernel [2.4 or later], the file system [at least Reiser 
and ext2 are supported], the C library [glibc 2.x], and possibly other 
file utilities [ls, rm, etc.] and the shell itself [bash, tcsh, etc.] if 
redirection is involved.) "

http://www.info-zip.org/pub/infozip/FAQ.html#limits

--
Philip K. Warren
pk...@us...
Phone: 512.838.8924
T/L 678.8924