1 files changed, 37 insertions, 0 deletions
diff --git a/lib9/errstr-posix.c b/lib9/errstr-posix.c
new file mode 100644
index 00000000..eacc7754
--- /dev/null
+++ b/lib9/errstr-posix.c
@@ -0,0 +1,37 @@
+#include "lib9.h"
+
+#include <errno.h>
+
+static char errstring[ERRMAX];
+
+enum
+{
+	Magic = 0xffffff
+};
+
+void
+werrstr(char *fmt, ...)
+{
+	va_list arg;
+
+	va_start(arg, fmt);
+	vseprint(errstring, errstring+sizeof(errstring), fmt, arg);
+	va_end(arg);
+	errno = Magic;
+}
+
+void
+oserrstr(char *buf, uint nerr)
+{
+	utfecpy(buf, buf+nerr, strerror(errno));
+}
+
+int
+errstr(char *buf, uint nerr)
+{
+	if(errno == Magic)
+		utfecpy(buf, buf+nerr, errstring);
+	else
+		oserrstr(buf, nerr);
+	return 1;
+}