tools: add a new architecture detection tool

Signed-off-by: Paul Moore <pmoore@redhat.com>

3 files changed, 91 insertions, 1 deletions

diff --git a/tools/.gitignore b/tools/.gitignore
index 8e972bf..0822833 100644
--- a/tools/.gitignore
+++ b/tools/.gitignore
@@ -1,3 +1,4 @@
 bpf_disasm
 bpf_sim
 sys_resolver
+arch_detect
diff --git a/tools/Makefile b/tools/Makefile
index 74f2caa..db6b609 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -35,7 +35,8 @@ LDFLAGS := ../src/libseccomp.a
 
 TOOLS = bpf_disasm \
 	bpf_sim \
-	sys_resolver
+	sys_resolver \
+	arch_detect
 
 DEPS = $(TOOLS:%=%.d)
 
diff --git a/tools/arch_detect.c b/tools/arch_detect.c
new file mode 100644
index 0000000..0aca5a8
--- /dev/null
+++ b/tools/arch_detect.c
@@ -0,0 +1,88 @@
+/**
+ * Architecture Detector
+ *
+ * Copyright (c) 2013 Red Hat <pmoore@redhat.com>
+ * Author: Paul Moore <pmoore@redhat.com>
+ */
+
+/*
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses>.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <seccomp.h>
+
+/**
+ * Print the usage information to stderr and exit
+ * @param program the name of the current program being invoked
+ *
+ * Print the usage information and exit with EINVAL.
+ *
+ */
+static void exit_usage(const char *program)
+{
+	fprintf(stderr,
+		"usage: %s [-h] [-t]\n",
+		program);
+	exit(EINVAL);
+}
+
+/**
+ * main
+ */
+int main(int argc, char *argv[])
+{
+	int opt;
+	int token = 0;
+	uint32_t arch;
+
+	/* parse the command line */
+	while ((opt = getopt(argc, argv, "ht"))> 0) {
+		switch (opt) {
+		case 't':
+			token = 1;
+			break;
+		case 'h':
+		default:
+			/* usage information */
+			exit_usage(argv[0]);
+		}
+	}
+
+	arch = seccomp_arch_native();
+	if (token == 0) {
+		switch (arch) {
+		case SCMP_ARCH_X86:
+			printf("x86\n");
+			break;
+		case SCMP_ARCH_X86_64:
+			printf("x86_64\n");
+			break;
+		case SCMP_ARCH_X32:
+			printf("x32\n");
+			break;
+		case SCMP_ARCH_ARM:
+			printf("arm\n");
+			break;
+		default:
+			printf("unknown\n");
+		}
+	} else
+		printf("%d\n", arch);
+
+	return 0;
+}