From 3765d3b7606c18116a5feec748a632afa85123b8 Mon Sep 17 00:00:00 2001
From: Stephen Mathieson <smath23@gmail.com>
Date: Sat, 15 Feb 2014 09:55:33 -0500
Subject: [PATCH] Enable custom timestamp formats via env flag

---
 tcat.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tcat.c b/tcat.c
index 1e338fd..fe742ed 100644
--- a/tcat.c
+++ b/tcat.c
@@ -11,7 +11,8 @@ enum {
 };
 
 static const char program_name[] = "tcat";
-static const char format[]       = "%FT%T%z\t";
+static const char env_flag[]     = "TCAT_FORMAT";
+static const char *format        = "%FT%T%z\t";
 
 static void io_error(FILE* file) {
   if (feof(file)) {
@@ -90,6 +91,11 @@ int main(int argc, char** argv) {
     fprintf(stderr, "Warning: input is from TTY\n");
   }
 
+  char *format_env = getenv(env_flag);
+  if (format_env) {
+    format = format_env;
+  }
+
   int last = '\n';
   for(int c = fgetc(stdin); c != EOF; c = fgetc(stdin)) {
     if (last == '\n') {