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diff --git a/usage.c b/usage.c
index b781b0061ea5a100ac8f86a0a87d4ac92c77c407..f5e652cc76d7587fd7b682eb865d3436c99b16fb 100644 (file)
--- a/usage.c
+++ b/usage.c
@@ -12,29 +12,34 @@ static void report(const char *prefix, const char *err, va_list params)
        fputs("\n", stderr);
 }
 
-void usage_builtin(const char *err)
+static NORETURN void usage_builtin(const char *err)
 {
        fprintf(stderr, "usage: %s\n", err);
        exit(129);
 }
 
-void die_builtin(const char *err, va_list params)
+static NORETURN void die_builtin(const char *err, va_list params)
 {
        report("fatal: ", err, params);
        exit(128);
 }
 
-void error_builtin(const char *err, va_list params)
+static void error_builtin(const char *err, va_list params)
 {
        report("error: ", err, params);
 }
 
+static void warn_builtin(const char *warn, va_list params)
+{
+       report("warning: ", warn, params);
+}
 
 /* If we are in a dlopen()ed .so write to a global variable would segfault
  * (ugh), so keep things static. */
 static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
 static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
 static void (*error_routine)(const char *err, va_list params) = error_builtin;
+static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
 
 void set_usage_routine(void (*routine)(const char *err) NORETURN)
 {
@@ -51,6 +56,11 @@ void set_error_routine(void (*routine)(const char *err, va_list params))
        error_routine = routine;
 }
 
+void set_warn_routine(void (*routine)(const char *warn, va_list params))
+{
+       warn_routine = routine;
+}
+
 
 void usage(const char *err)
 {
@@ -75,3 +85,12 @@ int error(const char *err, ...)
        va_end(params);
        return -1;
 }
+
+void warning(const char *warn, ...)
+{
+       va_list params;
+
+       va_start(params, warn);
+       warn_routine(warn, params);
+       va_end(params);
+}