openwrt-xburst/package/nvram/src/main.c

/*
 * Frontend command-line utility for Linux NVRAM layer
 *
 * Copyright 2004, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 *
 * $Id$
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <typedefs.h>
#include <bcmnvram.h>

static void
usage(void)
{
	fprintf(stderr, "usage: nvram [get name] [set name=value] [unset name] [show]\n");
	exit(0);
}

/* hack for some PMON default nvram values which have '\r' appended */
void
puts_trim_cr(char *str)
{
	int len= strlen(str);
	if (len && (str[len-1] == '\r')) len--;
	printf("%.*s\n", len, str);
}

/* NVRAM utility */
int
main(int argc, char **argv)
{
	char *name, *value, buf[NVRAM_SPACE];
	int size;

	/* Skip program name */
	--argc;
	++argv;

	if (!*argv) 
		usage();

	/* Process the remaining arguments. */
	for (; *argv; argv++) {
		if (!strncmp(*argv, "get", 3)) {
			if (*++argv) {
				if ((value = nvram_get(*argv))) {
					puts_trim_cr(value);
				}
			}
		}
		else if (!strncmp(*argv, "set", 3)) {
			if (*++argv) {
				strncpy(value = buf, *argv, sizeof(buf));
				name = strsep(&value, "=");
				nvram_set(name, value);
			}
		}
		else if (!strncmp(*argv, "unset", 5)) {
			if (*++argv)
				nvram_unset(*argv);
		}
		else if (!strncmp(*argv, "commit", 5)) {
			nvram_commit();
		}
		else if (!strncmp(*argv, "show", 4) ||
			   !strncmp(*argv, "getall", 6)) {
			nvram_getall(buf, sizeof(buf));
			for (name = buf; *name; name += strlen(name) + 1)
				puts_trim_cr(name);
			size = sizeof(struct nvram_header) + (int) name - (int) buf;
			fprintf(stderr, "size: %d bytes (%d left)\n", size, NVRAM_SPACE - size);
		}
		if (!*argv)
			break;
	}

	return 0;
}