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[Support] On AIX, Check ENOTSUP on posix_fallocate instead of EOPNOTSUPP

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Summary:
`posix_fallocate` can fail if the underlying filesystem does not support
it; and, on AIX, such a failure is reported by a return value of
`ENOTSUP`. The existing code checks only for `EOPNOTSUPP`, which may
share the same value as `ENOTSUP`, but is not required to.

Reviewers: xingxue, sfertile, jasonliu

Reviewed By: xingxue

Subscribers: kristina, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60175

llvm-svn: 357662
This commit is contained in:
Hubert Tong 2019-04-04 00:40:34 +00:00
parent 749f5577e5
commit b555a35e35
1 changed files with 6 additions and 1 deletions
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7
lib/Support/Unix/Path.inc
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@ -492,7 +492,12 @@ std::error_code resize_file(int FD, uint64_t Size) {
// If we have posix_fallocate use it. Unlike ftruncate it always allocates
// space, so we get an error if the disk is full.
if (int Err = ::posix_fallocate(FD, 0, Size)) {
if (Err != EINVAL && Err != EOPNOTSUPP)
#ifdef _AIX
constexpr int NotSupportedError = ENOTSUP;
#else
constexpr int NotSupportedError = EOPNOTSUPP;
#endif
if (Err != EINVAL && Err != NotSupportedError)
return std::error_code(Err, std::generic_category());
}
#endif