weak_alias (__error, error)
weak_alias (__error_at_line, error_at_line)
+
+
+#include "err.h"
+#include "errno.h"
+
+/* NORETURN */
+void verr (int status, const char *message, va_list args)
+{
+ fflush (stdout);
+
+ vfprintf (stderr, message, args);
+ if (errno) {
+ fprintf (stderr, ": %s", strerror (errno));
+ }
+ putc ('\n', stderr);
+ if (status)
+ exit (status);
+}
+
+/* NORETURN */
+void verrx (int status, const char *message, va_list args)
+{
+ fflush (stdout);
+
+ vfprintf (stderr, message, args);
+ if (status)
+ exit (status);
+}
+
+void vwarn (const char *message, va_list args)
+{
+ verr (0, message, args);
+}
+
+void vwarnx (const char *message, va_list args)
+{
+ verrx (0, message, args);
+}
+
+void err (int status, const char *message, ...)
+{
+ va_list args;
+
+ va_start (args, message);
+ verr (status, message, args);
+ va_end (args);
+}
+
+void errx (int status, const char *message, ...)
+{
+ va_list args;
+
+ va_start (args, message);
+ verrx (status, message, args);
+ va_end (args);
+}
+
+void warn (const char *message, ...)
+{
+ va_list args;
+
+ va_start (args, message);
+ verr (0, message, args);
+ va_end (args);
+}
+
+void warnx (const char *message, ...)
+{
+ va_list args;
+
+ va_start (args, message);
+ verrx (0, message, args);
+ va_end (args);
+}