Restructure files and libraries

Rename a bunch of files to make the consistent
	Create two new subdirectories for common code, and utilities

util/cpugovctl.c

@@ -0,0 +1,93 @@
+/*
+
+Copyright (c) 2017-2019, Feral Interactive
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ * Neither the name of Feral Interactive nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+ */
+
+#define _GNU_SOURCE
+
+#include "common-governors.h"
+#include "common-logging.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <sys/types.h>
+
+/**
+ * Sets all governors to a value
+ */
+static int set_gov_state(const char *value)
+{
+	char governors[MAX_GOVERNORS][MAX_GOVERNOR_LENGTH] = { { 0 } };
+	int num = fetch_governors(governors);
+	int retval = EXIT_SUCCESS;
+	int res = 0;
+
+	for (int i = 0; i < num; i++) {
+		const char *gov = governors[i];
+		FILE *f = fopen(gov, "w");
+		if (!f) {
+			LOG_ERROR("Failed to open file for write %s\n", gov);
+			continue;
+		}
+
+		res = fprintf(f, "%s\n", value);
+		if (res < 0) {
+			LOG_ERROR("Failed to set governor %s to %s: %s", gov, value, strerror(errno));
+			retval = EXIT_FAILURE;
+		}
+		fclose(f);
+	}
+
+	return retval;
+}
+
+/**
+ * Main entry point, dispatch to the appropriate helper
+ */
+int main(int argc, char *argv[])
+{
+	if (argc == 2 && strncmp(argv[1], "get", 3) == 0) {
+		printf("%s", get_gov_state());
+	} else if (argc == 3 && strncmp(argv[1], "set", 3) == 0) {
+		const char *value = argv[2];
+
+		/* Must be root to set the state */
+		if (geteuid() != 0) {
+			LOG_ERROR("This program must be run as root\n");
+			return EXIT_FAILURE;
+		}
+
+		return set_gov_state(value);
+	} else {
+		fprintf(stderr, "usage: cpugovctl [get] [set VALUE]\n");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}