diff options
| -rw-r--r-- | runtime/os.h | 3 | ||||
| -rw-r--r-- | runtime/os_linux.cc | 4 |
2 files changed, 6 insertions, 1 deletions
diff --git a/runtime/os.h b/runtime/os.h index 6248d5fc14..befe2e808a 100644 --- a/runtime/os.h +++ b/runtime/os.h @@ -35,7 +35,8 @@ class OS { // Open an existing file with read/write access. static File* OpenFileReadWrite(const char* name); - // Create an empty file with read/write access. + // Create an empty file with read/write access. This is a *new* file, that is, if the file + // already exists, it is *not* overwritten, but unlinked, and a new inode will be used. static File* CreateEmptyFile(const char* name); // Open a file with the specified open(2) flags. diff --git a/runtime/os_linux.cc b/runtime/os_linux.cc index 22827891b0..675699daea 100644 --- a/runtime/os_linux.cc +++ b/runtime/os_linux.cc @@ -36,6 +36,10 @@ File* OS::OpenFileReadWrite(const char* name) { } File* OS::CreateEmptyFile(const char* name) { + // In case the file exists, unlink it so we get a new file. This is necessary as the previous + // file may be in use and must not be changed. + unlink(name); + return OpenFileWithFlags(name, O_RDWR | O_CREAT | O_TRUNC); } |