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-rw-r--r--lib/libutil/pw_lock.37
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/libutil/pw_lock.3 b/lib/libutil/pw_lock.3
index b5791af817c..f5fed6157d4 100644
--- a/lib/libutil/pw_lock.3
+++ b/lib/libutil/pw_lock.3
@@ -60,8 +60,10 @@ functions allow a program to update the system passwd database.
The
.Fn pw_lock
function attempts to lock the passwd database by creating the file
-.Pa /etc/ptmp ,
-and returns the file descriptor of that file. If
+.Pa /etc/ptmp
+with an exclusive lock (using
+.Xr flock 2
+semantics) and returns the file descriptor of that file. If
.Fa retries
is greater than zero,
.Fn pw_lock
@@ -102,4 +104,5 @@ functions return -1 if they are unable to complete properly.
.It Pa /etc/ptmp
.El
.Sh SEE ALSO
+.Xr flock 2 ,
.Xr pw_init 3