Add ENV_NAME_FORCE_WRITE to force writes to non-tty devices.

[coloredstderr/coloredstderr.git] / src / trackfds.h

diff --git a/src/trackfds.h b/src/trackfds.h
index e342b1223394e1a8fc9b4c28178ac44f478ddc3b..614b4bf8a0fb1d3181a57199133761339959f455 100644 (file)
--- a/src/trackfds.h
+++ b/src/trackfds.h
@@ -34,10 +34,19 @@ static size_t tracked_fds_space;
  * ENV_NAME_FDS has the following format: Each descriptor as string followed
  * by a comma; there's a trailing comma. Example: "2,4,". */
 static void init_from_environment(void) {
+    const char *env;
+
     initialized = 1;
     tracked_fds_count = 0;
 
-    const char *env = getenv(ENV_NAME_FDS);
+    /* If ENV_NAME_FORCE_WRITE is set and not empty, allow writes to a non-tty
+     * device. Use with care! Mainly used for the test suite. */
+    env = getenv(ENV_NAME_FORCE_WRITE);
+    if (env && env[0] != '\0') {
+        force_write_to_non_tty = 1;
+    }
+
+    env = getenv(ENV_NAME_FDS);
     if (!env) {
         return;
     }