1 files changed, 85 insertions, 0 deletions

diff --git a/openbsd-compat/err.h b/openbsd-compat/err.h
new file mode 100644
index 0000000..394c7bb
--- /dev/null
+++ b/openbsd-compat/err.h
@@ -0,0 +1,85 @@
+/*
+ * Public domain
+ * err.h compatibility shim
+ */
+
+#ifndef _COMPAT_ERR_H
+#define _COMPAT_ERR_H
+
+#if !defined(HAVE_ERR_H)
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#if defined(_MSC_VER)
+__declspec(noreturn)
+#else
+__attribute__((noreturn))
+#endif
+static inline void
+err(int eval, const char *fmt, ...)
+{
+        int sverrno = errno;
+        va_list ap;
+
+        va_start(ap, fmt);
+        if (fmt != NULL) {
+                vfprintf(stderr, fmt, ap);
+                fprintf(stderr, ": ");
+        }
+        va_end(ap);
+        fprintf(stderr, "%s\n", strerror(sverrno));
+        exit(eval);
+}
+
+#if defined(_MSC_VER)
+__declspec(noreturn)
+#else
+__attribute__((noreturn))
+#endif
+static inline void
+errx(int eval, const char *fmt, ...)
+{
+        va_list ap;
+
+        va_start(ap, fmt);
+        if (fmt != NULL)
+                vfprintf(stderr, fmt, ap);
+        va_end(ap);
+        fprintf(stderr, "\n");
+        exit(eval);
+}
+
+static inline void
+warn(const char *fmt, ...)
+{
+        int sverrno = errno;
+        va_list ap;
+
+        va_start(ap, fmt);
+        if (fmt != NULL) {
+                vfprintf(stderr, fmt, ap);
+                fprintf(stderr, ": ");
+        }
+        va_end(ap);
+        fprintf(stderr, "%s\n", strerror(sverrno));
+}
+
+static inline void
+warnx(const char *fmt, ...)
+{
+        va_list ap;
+
+        va_start(ap, fmt);
+        if (fmt != NULL)
+                vfprintf(stderr, fmt, ap);
+        va_end(ap);
+        fprintf(stderr, "\n");
+}
+
+#endif /* !defined(HAVE_ERR_H) */
+
+#endif /* _COMPAT_ERR_H */