busybox

​

/*

 * Sysctl 1.01 - A utility to read and manipulate the sysctl parameters

 *

 *

 * "Copyright 1999 George Staikos

 * This file may be used subject to the terms and conditions of the

 * GNU General Public License Version 2, or any later version

 * at your option, as published by the Free Software Foundation.

 * This program 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 General Public License for more details."

 *

 * Changelog:

 *  v1.01:

 *      - added -p <preload> to preload values from a file

 *  v1.01.1

 *      - busybox applet aware by <solar@gentoo.org>

 *

 */

​

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <dirent.h>

#include <string.h>

#include <errno.h>

#include <fcntl.h>

#include "busybox.h"

​

/*

 *    Function Prototypes

 */

static int sysctl_read_setting(const char *setting, int output);

static int sysctl_write_setting(const char *setting, int output);

static int sysctl_preload_file(const char *filename, int output);

static int sysctl_display_all(const char *path, int output, int show_table);

​

/*

 *    Globals...

 */

static const char PROC_PATH[] = "/proc/sys/";

static const char DEFAULT_PRELOAD[] = "/etc/sysctl.conf";

​

/* error messages */

static const char ERR_UNKNOWN_PARAMETER[] = "error: Unknown parameter '%s'\n";

static const char ERR_MALFORMED_SETTING[] = "error: Malformed setting '%s'\n";

static const char ERR_NO_EQUALS[] =

    "error: '%s' must be of the form name=value\n";

static const char ERR_INVALID_KEY[] = "error: '%s' is an unknown key\n";

static const char ERR_UNKNOWN_WRITING[] =

    "error: unknown error %d setting key '%s'\n";

static const char ERR_UNKNOWN_READING[] =

    "error: unknown error %d reading key '%s'\n";

static const char ERR_PERMISSION_DENIED[] =

    "error: permission denied on key '%s'\n";

static const char ERR_OPENING_DIR[] = "error: unable to open directory '%s'\n";

static const char ERR_PRELOAD_FILE[] =

    "error: unable to open preload file '%s'\n";

static const char WARN_BAD_LINE[] =