(Writing a User Entry): Document behavior of putpwent if user name starts with + or -.

1 files changed, 3 insertions, 0 deletions

diff --git a/manual/users.texi b/manual/users.texi
index 20deeabdd2..b52ee44439 100644
--- a/manual/users.texi
+++ b/manual/users.texi
@@ -1690,6 +1690,9 @@ extended information about users, adding an entry using this function
 would inevitably leave out much of the important information.
 @c Then how are programmers to modify the password file? -zw
 
+The group and user ID fields are left empty if the group or user name
+starts with a - or +.
+
 The function @code{putpwent} is declared in @file{pwd.h}.
 @end deftypefun