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If posix_fallocate returns EOPNOTSUPP, fallback to ftruncate.

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This can happen at least on NetBSD.

llvm-svn: 302263
This commit is contained in:
Joerg Sonnenberger 2017-05-05 17:55:58 +00:00
parent f0aeee01c3
commit ecfb876eac
1 changed files with 5 additions and 4 deletions
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9
llvm/lib/Support/Unix/Path.inc
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@ -421,14 +421,15 @@ std::error_code resize_file(int FD, uint64_t Size) {
#if defined(HAVE_POSIX_FALLOCATE)
// 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))
return std::error_code(Err, std::generic_category());
#else
if (int Err = ::posix_fallocate(FD, 0, Size)) {
if (Err != EOPNOTSUPP)
return std::error_code(Err, std::generic_category());
}
#endif
// Use ftruncate as a fallback. It may or may not allocate space. At least on
// OS X with HFS+ it does.
if (::ftruncate(FD, Size) == -1)
return std::error_code(errno, std::generic_category());
#endif
return std::error_code();
}