From f2128b58f2041eb910dcbca77b2a761ea35460d7 Mon Sep 17 00:00:00 2001
From: Christopher Wellons <wellons@nullprogram.com>
Date: Tue, 5 Feb 2019 23:26:46 -0500
Subject: [PATCH] Save errno value across logmsg()

Need to be able to log messages without affecting errno.
---
 endlessh.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/endlessh.c b/endlessh.c
index 4a71673..ea4b45b 100644
--- a/endlessh.c
+++ b/endlessh.c
@@ -42,6 +42,8 @@ static void
 logmsg(enum loglevel level, const char *format, ...)
 {
     if (loglevel >= level) {
+        int save = errno;
+
         /* Print a timestamp */
         long long now = uepoch();
         time_t t = now / 1000;
@@ -56,6 +58,8 @@ logmsg(enum loglevel level, const char *format, ...)
         vprintf(format, ap);
         va_end(ap);
         fputc('\n', stdout);
+
+        errno = save;
     }
 }