From 6f8729bd0e99c8aa00626eebd54fe2b7abf54606 Mon Sep 17 00:00:00 2001
From: chrisdebian <cjhandrew@gmail.com>
Date: Thu, 20 Aug 2026 18:01:14 +0100
Subject: [PATCH 1/2] vlogger.8: fix incorrect default -t tag documentation

The -t tag option's man page entry claimed the default tag is the
LOGNAME environment variable. That's incorrect - vlogger.c never
calls getenv() anywhere. The actual default when -t isn't given:

- if /etc/vlogger is used, the tag arg passed to it defaults to an
  empty string (tag ? tag : "")
- if syslog(3) is used directly, the tag defaults to the result of
  getlogin(3) (tag ? tag : getlogin())

Neither is LOGNAME. Corrected the description to match.

The -p pri option's documented default of user.notice is correct as
written (facility = LOG_USER; level = LOG_NOTICE; are the literal
initial values in main()), so left that section untouched.
---
 vlogger.8 | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/vlogger.8 b/vlogger.8
index 24a45c82..c0f47828 100644
--- a/vlogger.8
+++ b/vlogger.8
@@ -115,9 +115,13 @@ Defines the
 .Pa ident
 which is used as prefix for each log message or passed as first argument to
 .Pa /etc/vlogger .
-The default is the
-.Ev LOGNAME
-environment variable.
+If not given, the default is an empty string when
+.Pa /etc/vlogger
+is used, or the result of
+.Xr getlogin 3
+when
+.Xr syslog 3
+is used directly.
 .It Ar message
 Write the
 .Ar message

From ed9955000f3c67161ad8e643f7e29e6adc4f0911 Mon Sep 17 00:00:00 2001
From: chrisdebian <cjhandrew@gmail.com>
Date: Fri, 21 Aug 2026 10:30:46 +0100
Subject: [PATCH 2/2] vlogger.8: clarify getlogin(3) default is libc-dependent
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

classabbyamp pointed out (PR #137) that getlogin(3) returns $LOGNAME
on musl but NULL unconditionally on glibc. The previous wording
correctly traced the C code (tag ? tag : getlogin()) but didn't tell
the reader the practical outcome differs by libc — on glibc, the
default is effectively no tag at all, same as the /etc/vlogger case.

Verified with groff -mandoc -Tascii -z (clean) and checked the
rendered output.
---
 vlogger.8 | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/vlogger.8 b/vlogger.8
index c0f47828..8f0a60ca 100644
--- a/vlogger.8
+++ b/vlogger.8
@@ -117,11 +117,20 @@ which is used as prefix for each log message or passed as first argument to
 .Pa /etc/vlogger .
 If not given, the default is an empty string when
 .Pa /etc/vlogger
-is used, or the result of
-.Xr getlogin 3
-when
+is used.
+When
 .Xr syslog 3
-is used directly.
+is used directly, the default is the result of
+.Xr getlogin 3 ,
+which on
+.Tn glibc
+always returns
+.Dv NULL
+(no tag) and on
+.Tn musl
+returns the value of the
+.Ev LOGNAME
+environment variable.
 .It Ar message
 Write the
 .Ar message