diff options
Diffstat (limited to 'winsup/cygwin/mmap.cc')
| -rw-r--r-- | winsup/cygwin/mmap.cc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc index e1fc2d621..9c9c75c50 100644 --- a/winsup/cygwin/mmap.cc +++ b/winsup/cygwin/mmap.cc @@ -380,7 +380,10 @@ mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t off) } DWORD access = (prot & PROT_WRITE) ? FILE_MAP_WRITE : FILE_MAP_READ; - if (flags & MAP_PRIVATE) + /* copy-on-write doesn't work correctly on 9x. To have at least read + access we use *READ mapping on 9x when appropriate. It will still + fail when needing write access, though. */ + if ((flags & MAP_PRIVATE) && (os_being_run == winNT || !(prot & PROT_READ))) access = FILE_MAP_COPY; SetResourceLock(LOCK_MMAP_LIST,READ_LOCK|WRITE_LOCK," mmap"); |