Avoid using fprintf

1 files changed, 14 insertions, 6 deletions

diff --git a/libmisc/assert.c b/libmisc/assert.c
index 987fb4d..9b1a0bc 100644
--- a/libmisc/assert.c
+++ b/libmisc/assert.c
@@ -4,20 +4,28 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-#include <stdio.h>  /* for fprintf(), stderr */
-#include <stdlib.h> /* for abort() */
+#include <stdbool.h> /* for bool, true, false */
+#include <stdio.h>   /* for printf() */
+#include <stdlib.h>  /* for abort() */
 
 #include <libmisc/assert.h>
 
 #ifndef NDEBUG
+
+static bool in_fail = false;
+
 __attribute__((__noreturn__)) void
 __assert_msg_fail(const char *expr,
                   const char *file, unsigned int line, const char *func,
                   const char *msg) {
-	fprintf(stderr, "error: %s:%u:%s(): assertion \"%s\" failed%s%s\n",
-	        file, line, func,
-	        expr,
-	        msg ? ": " : "", msg);
+	if (!in_fail) {
+		in_fail = true;
+		printf("error: %s:%u:%s(): assertion \"%s\" failed%s%s\n",
+		       file, line, func,
+		       expr,
+		       msg ? ": " : "", msg);
+	}
 	abort();
 }
+
 #endif