path: root/libmount/src/init.c

/*
 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
 *
 * This file may be redistributed under the terms of the
 * GNU Lesser General Public License.
 */

/**
 * SECTION: init
 * @title: Library initialization
 * @short_description: initialize debugging
 */

#include <stdarg.h>

#include "mountP.h"

UL_DEBUG_DEFINE_MASK(libmount);
static const struct dbg_mask libmount_masknames [] = {
	{ "all", MNT_DEBUG_ALL },
	{ "init", MNT_DEBUG_INIT },
	{ "cache", MNT_DEBUG_CACHE },
	{ "options", MNT_DEBUG_OPTIONS },
	{ "locks", MNT_DEBUG_LOCKS },
	{ "tab", MNT_DEBUG_TAB },
	{ "fs", MNT_DEBUG_FS },
	{ "opts", MNT_DEBUG_OPTS },
	{ "update", MNT_DEBUG_UPDATE },
	{ "utils", MNT_DEBUG_UTILS },
	{ "cxt", MNT_DEBUG_CXT },
	{ "diff", MNT_DEBUG_DIFF },
	{ NULL, 0 }
};
/**
 * mnt_init_debug:
 * @mask: debug mask (0xffff to enable full debugging)
 *
 * If the @mask is not specified, then this function reads
 * the LIBMOUNT_DEBUG environment variable to get the mask.
 *
 * Already initialized debugging stuff cannot be changed. Calling
 * this function twice has no effect.
 */
void mnt_init_debug(int mask)
{
	__UL_INIT_DEBUG(libmount, MNT_DEBUG_, mask, LIBMOUNT_DEBUG);

	if (libmount_debug_mask != MNT_DEBUG_INIT) {
		const char *ver = NULL;
		const char **features = NULL, **p;

		mnt_get_library_version(&ver);
		mnt_get_library_features(&features);

		DBG(INIT, ul_debug("library version: %s", ver));
		p = features;
		while (p && *p)
			DBG(INIT, ul_debug("    feature: %s", *p++));
	}
}

#ifdef TEST_PROGRAM

#include <errno.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
	if (argc == 2) {
		int mask;

		errno = 0;
		mask = strtoul(argv[1], 0, 0);

		if (errno)
			return 1;

		__UL_INIT_DEBUG(libmount, MNT_DEBUG_, mask, LIBMOUNT_DEBUG);
	}
	else if (argc == 1) {
		__UL_INIT_DEBUG(libmount, MNT_DEBUG_, 0, LIBMOUNT_DEBUG);
	}
	else
		return 1;

	return 0;
}
#endif /* TEST_PROGRAM */