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8 Commits

Author SHA1 Message Date
Rui Ueyama e9d17545bc TarWriter: Fix a bug in Ustar header. 
If we split a filename into `Name` and `Prefix`, `Prefix` is at most
145 bytes. We had a bug that didn't split a path correctly. This bug
was pointed out by Rafael in the post commit review.

This patch adds a unit test for TarWriter to verify the fix.

llvm-svn: 291494
 2017-01-09 22:55:00 +00:00
Rui Ueyama a84ab073d9 TarWriter: Set "00" to Ustar version field. 
Most (maybe all?) tar commands can handle tar archives with blank
version fields, but POSIX requires "00" to be set to the field, so
doing it is good for compliance.

llvm-svn: 291479
 2017-01-09 21:20:42 +00:00
Rui Ueyama 3e6490399e Define sys::path::convert_to_slash 
This patch moves convertToUnixPathSeparator from LLD to LLVM.

Differential Revision: https://reviews.llvm.org/D28444

llvm-svn: 291414
 2017-01-09 01:47:15 +00:00
Rui Ueyama d52f4b86f3 TarWriter: Use fitsInUstar function. 
This change should have been commit as part of r291340.

llvm-svn: 291341
 2017-01-07 08:32:07 +00:00
Rui Ueyama 999f094aa3 TarWriter: Use Ustar header's "prefix" field to store long filenames. 
Tar's Ustar header has the "prefix" field to store a directory
part of a filename. It is not as flexible as the PAX-extended
filename because there's still a limitation on the maximum filename
size, but it mitigates the situation.

This patch should unbreak some Windows buildbots that uses very
old tar command.

llvm-svn: 291340
 2017-01-07 08:28:56 +00:00
Reid Kleckner 5984d01826 Use %z for size_t and avoid deprecated string functions 
This usage of strcpy and snprintf was certainly safe, but using them
sets off various deprecation and lint warnings. Easier to just write the
belt and suspenders version.

llvm-svn: 291256
 2017-01-06 18:22:18 +00:00
Rui Ueyama f2a6275116 TarWriter: Emit PAX headers only when needed. 
We use PAX headers to store long filenames (>= 100 bytes).
It is not needed to emit PAX headers if filenames fit in the
Ustar header. This patch implements that optimization.

llvm-svn: 291215
 2017-01-06 05:33:45 +00:00
Rui Ueyama 4bb7883f0c Add a class to create a tar archive file. 
In LLD, we create cpio archive files for --reproduce command.
cpio was not a bad choice because it is very easy to create, but
it was sometimes hard to use because people are not familiar with
cpio command.

I noticed that creating a tar archive isn't as hard as I thought.
So I implemented it in this patch.

Differential Revision: https://reviews.llvm.org/D28091

llvm-svn: 291209
 2017-01-06 02:29:48 +00:00