checkin

1 files changed, 15 insertions, 0 deletions

diff --git a/src/libfmt/panic.c b/src/libfmt/panic.c
new file mode 100644
index 0000000..25ee277
--- /dev/null
+++ b/src/libfmt/panic.c
@@ -0,0 +1,15 @@
+#include "internal.h"
+
+void
+fmt·panic(char *fmt, ...)
+{
+    char buf[256];
+    va_list arg;
+
+    va_start(arg, fmt);
+    fmt·vesprint(buf, arrend(buf), fmt, arg);
+    va_end(arg);
+
+    fmt·fprint(2, "%s: %s\n", argv0 ? argv0 : "<prog>", buf);
+    exits("fatal");
+}