1 files changed, 3 insertions, 0 deletions

diff --git a/libexec/ftpd/ftpd.c b/libexec/ftpd/ftpd.c
index 10e438787b36..fdcb76e0edeb 100644
--- a/libexec/ftpd/ftpd.c
+++ b/libexec/ftpd/ftpd.c
@@ -934,6 +934,9 @@ sgetsave(char *s)
  * Save the result of a getpwnam.  Used for USER command, since
  * the data returned must not be clobbered by any other command
  * (e.g., globbing).
+ * NB: The data returned by sgetpwnam() will remain valid until
+ * the next call to this function.  Its difference from getpwnam()
+ * is that sgetpwnam() is known to be called from ftpd code only.
  */
 static struct passwd *
 sgetpwnam(char *name)