Added a small program to control the cache (using the generic syscall mechanism).

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10645 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/apps/Jamfile

@@ -15,6 +15,15 @@ KernelObjects
 	on_exit_thread.c
 	;
 
+UsePrivateHeaders kernel ;
+# UsePrivateHeaders [ FDirName kernel arch ] ;
+UsePrivateHeaders [ FDirName kernel arch $(OBOS_ARCH) ] ;
+UsePrivateHeaders [ FDirName kernel boot platform $(OBOS_BOOT_PLATFORM) ] ;
+
+StdBinCommands
+	cache_control.cpp
+	: libroot.so ;
+
 if $(OBOS_ARCH) = x86 {
 	SubInclude OBOS_TOP src kernel apps cpuinfo ;
 }

src/kernel/apps/cache_control.cpp

@@ -0,0 +1,58 @@
+/* 
+ * Copyright 2004, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <OS.h>
+#include <syscalls.h>
+#include <generic_syscall.h>
+
+#include <file_cache.h>
+
+#include <stdio.h>
+#include <string.h>
+
+
+extern const char *__progname;
+
+
+void
+usage()
+{
+	fprintf(stderr, "usage: %s [clear | unset | set <module-name>]\n", __progname);
+	exit(0);
+}
+
+
+int
+main(int argc, char **argv)
+{
+	uint32 version = 0;
+	status_t status = _kern_generic_syscall(CACHE_SYSCALLS, B_SYSCALL_INFO, &version, sizeof(version));
+	if (status != B_OK) {
+		fprintf(stderr, "%s: The cache syscalls are not available on this system.\n", __progname);
+		return 1;
+	}
+
+	if (argc < 2)
+		usage();
+
+	if (!strcmp(argv[1], "clear")) {
+		status = _kern_generic_syscall(CACHE_SYSCALLS, CACHE_CLEAR, NULL, 0);
+		if (status != B_OK)
+			fprintf(stderr, "%s: clearing the cache failed: %s\n", __progname, strerror(status));
+	} else if (!strcmp(argv[1], "unset")) {
+		status = _kern_generic_syscall(CACHE_SYSCALLS, CACHE_SET_MODULE, NULL, 0);
+		if (status != B_OK)
+			fprintf(stderr, "%s: unsetting the cache module failed: %s\n", __progname, strerror(status));
+	} else if (!strcmp(argv[1], "set") && argc > 2) {
+		status = _kern_generic_syscall(CACHE_SYSCALLS, CACHE_SET_MODULE, argv[2], strlen(argv[2]));
+		if (status != B_OK)
+			fprintf(stderr, "%s: setting the module failed: %s\n", __progname, strerror(status));
+	} else
+		usage();
+
+	return 0;
+}
+