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Merge pull request #28510 from tsawada:o_trunc

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PiperOrigin-RevId: 247948458
This commit is contained in:
TensorFlower Gardener 2019-05-13 09:25:59 -07:00
commit 0666c6cf53
1 changed files with 4 additions and 2 deletions
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tensorflow/core/platform/posix/posix_file_system.cc
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@ -336,11 +336,13 @@ Status PosixFileSystem::CopyFile(const string& src, const string& target) {
return IOError(src, errno); return IOError(src, errno);
} }
string translated_target = TranslateName(target); string translated_target = TranslateName(target);
// O_WRONLY | O_CREAT: // O_WRONLY | O_CREAT | O_TRUNC:
// Open file for write and if file does not exist, create the file. // Open file for write and if file does not exist, create the file.
// If file exists, truncate its size to 0.
// When creating file, use the same permissions as original // When creating file, use the same permissions as original
mode_t mode = sbuf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); mode_t mode = sbuf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO);
int target_fd = open(translated_target.c_str(), O_WRONLY | O_CREAT, mode); int target_fd =
open(translated_target.c_str(), O_WRONLY | O_CREAT | O_TRUNC, mode);
if (target_fd < 0) { if (target_fd < 0) {
close(src_fd); close(src_fd);
return IOError(target, errno); return IOError(target, errno);