From 37266ae4199ca021beb1678b62b9147b61b918a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sat, 26 Jan 2019 15:14:45 +0100
Subject: [PATCH] log: colorize console output only when stdout is a tty

---
 log.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/log.c b/log.c
index 458985a..27dd6b4 100644
--- a/log.c
+++ b/log.c
@@ -7,12 +7,16 @@
 #include <stdbool.h>
 #include <errno.h>
 #include <assert.h>
+#include <unistd.h>
 
 #include <syslog.h>
 
+static bool colorize = false;
+
 static void __attribute__((constructor))
 init(void)
 {
+    colorize = isatty(STDOUT_FILENO);
     openlog(NULL, /*LOG_PID*/0, LOG_USER);
     setlogmask(LOG_UPTO(LOG_WARNING));
 }
@@ -27,8 +31,6 @@ static void
 _log(enum log_class log_class, const char *module, const char *file, int lineno,
      const char *fmt, int sys_errno, va_list va)
 {
-    bool colorize = true;
-
     const char *class = "abcd";
     int class_clr = 0;
     switch (log_class) {