From 48e93b7c1a3abd2d7e24ed7b3d1fad83f7338813 Mon Sep 17 00:00:00 2001
From: Mike Lowis <mike.lowis@gentex.com>
Date: Tue, 26 Apr 2016 16:24:21 -0400
Subject: [PATCH] Added warning message function to util.h

---
 include/util.h | 12 ++++++++++++
 source/getty.c |  6 +++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/include/util.h b/include/util.h
index d5689cea..cae12905 100644
--- a/include/util.h
+++ b/include/util.h
@@ -47,6 +47,18 @@ static void die(const char* msgfmt, ...)
     exit(EXIT_FAILURE);
 }
 
+/* Generic Warning Function
+ *****************************************************************************/
+static void warn(const char* msgfmt, ...)
+{
+    va_list args;
+    va_start(args, msgfmt);
+    fprintf(stderr, "Warning: ");
+    vfprintf(stderr, msgfmt, args);
+    fprintf(stderr, "\n");
+    va_end(args);
+}
+
 /* Signal Handling
  *****************************************************************************/
 static void esignal(int sig, void (*func)(int))
diff --git a/source/getty.c b/source/getty.c
index 1499129b..f0d79323 100644
--- a/source/getty.c
+++ b/source/getty.c
@@ -28,7 +28,7 @@ static int opentty(void) {
     if (isatty(fd) == 0)
         die("%s is not a tty\n", TTY);
     if (ioctl(fd, TIOCSCTTY, (void *)1) != 0)
-        fprintf(stderr, "Warning: TIOCSCTTY: could not set controlling tty\n");
+        warn("TIOCSCTTY: could not set controlling tty\n");
     vhangup();
     close(fd);
     /* Now open it for real */
@@ -85,9 +85,9 @@ int main(int argc, char *argv[]) {
     dup2(fd, 1); // Make stdout the TTY
     dup2(fd, 2); // Make stderr the TTY
     if (fchown(fd, 0, 0) < 0)
-        fprintf(stderr, "fchown %s:", TTY);
+        warn("fchown %s:", TTY);
     if (fchmod(fd, 0600) < 0)
-        fprintf(stderr, "fchmod %s:", TTY);
+        warn("fchmod %s:", TTY);
     if (fd > 2)
         close(fd);
     sigignore(SIGHUP, 0); // stop ignoring SIGHUP
-- 
2.52.0