diff options
Diffstat (limited to 'winsup/cygwin/syscalls.cc')
| -rw-r--r-- | winsup/cygwin/syscalls.cc | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index 230028017..9d5c5a832 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -2501,8 +2501,7 @@ login (struct utmp *ut) pututline (ut); endutent (); - /* Read/write to utmp must be atomic to prevent overriding data - by concurrent processes. */ + /* Writing to wtmp must be atomic to prevent mixed up data. */ HANDLE mutex = CreateMutex (NULL, FALSE, shared_name ("wtmp_mutex", 0)); if (mutex) while (WaitForSingleObject (mutex, INFINITE) == WAIT_ABANDONED) @@ -2540,8 +2539,7 @@ logout (char *line) ut_buf.ut_type = DEAD_PROCESS; memset (ut_buf.ut_user, 0, sizeof ut_buf.ut_user); time (&ut_buf.ut_time); - /* Read/write to utmp must be atomic to prevent overriding data - by concurrent processes. */ + /* Writing to wtmp must be atomic to prevent mixed up data. */ HANDLE mutex = CreateMutex (NULL, FALSE, shared_name ("wtmp_mutex", 0)); if (mutex) while (WaitForSingleObject (mutex, INFINITE) == WAIT_ABANDONED) |