X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=usage.c;h=4dc5c77633747e0c2b3a4d04fddbd043f8f49e1e;hb=204d409247e7bbc7848569462aa11a87e373c8d6;hp=1fa924c3d9ed8f70523685c26cf169316b366598;hpb=1a17ee22a2fbd85a893ab36fd53168d03554c2dd;p=thirdparty%2Fgit.git

diff --git a/usage.c b/usage.c
index 1fa924c3d9..4dc5c77633 100644
--- a/usage.c
+++ b/usage.c
@@ -12,20 +12,68 @@ static void report(const char *prefix, const char *err, va_list params)
 	fputs("\n", stderr);
 }
 
-void usage(const char *err)
+static NORETURN void usage_builtin(const char *err)
 {
 	fprintf(stderr, "usage: %s\n", err);
 	exit(129);
 }
 
+static NORETURN void die_builtin(const char *err, va_list params)
+{
+	report("fatal: ", err, params);
+	exit(128);
+}
+
+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)
+{
+	usage_routine = routine;
+}
+
+void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
+{
+	die_routine = routine;
+}
+
+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)
+{
+	usage_routine(err);
+}
+
 void die(const char *err, ...)
 {
 	va_list params;
 
 	va_start(params, err);
-	report("fatal: ", err, params);
+	die_routine(err, params);
 	va_end(params);
-	exit(128);
 }
 
 int error(const char *err, ...)
@@ -33,7 +81,16 @@ int error(const char *err, ...)
 	va_list params;
 
 	va_start(params, err);
-	report("error: ", err, params);
+	error_routine(err, params);
 	va_end(params);
 	return -1;
 }
+
+void warn(const char *warn, ...)
+{
+	va_list params;
+
+	va_start(params, warn);
+	warn_routine(warn, params);
+	va_end(params);
+}