Genesis

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/errors/vwarn.c b/lib/errors/vwarn.c
new file mode 100644
index 0000000..bc6bd16
--- /dev/null
+++ b/lib/errors/vwarn.c
@@ -0,0 +1,15 @@
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "errors.h"
+
+void
+vwarn(const char *fmt, va_list ap)
+{
+	int save = errno;
+	fprintf(stderr, "%s: ", progname());
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, ": %s\n", strerror(save));
+}