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tar: handle 256-base encoding in mtime

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-07-08 18:58:09 +02:00
parent da49f58524
commit b773f715d6
1 changed files with 7 additions and 3 deletions
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10
archival/libunarchive/get_header_tar.c
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@ -301,9 +301,13 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
file_header->uname = tar.uname[0] ? xstrndup(tar.uname, sizeof(tar.uname)) : NULL;
file_header->gname = tar.gname[0] ? xstrndup(tar.gname, sizeof(tar.gname)) : NULL;
#endif
file_header->mtime = GET_OCTAL(tar.mtime);
/* Size field: handle GNU tar's "base256 encoding" */
file_header->size = (*tar.size & 0xc0) == 0x80 /* positive base256? */
/* mtime: rudimentally handle GNU tar's "base256 encoding"
* People report tarballs with NEGATIVE unix times encoded that way */
file_header->mtime = (tar.mtime[0] & 0x80) /* base256? */
? 0 /* bogus */
: GET_OCTAL(tar.mtime);
/* size: handle GNU tar's "base256 encoding" */
file_header->size = (tar.size[0] & 0xc0) == 0x80 /* positive base256? */
? getBase256_len12(tar.size)
: GET_OCTAL(tar.size);
file_header->gid = GET_OCTAL(tar.gid);