source: freewrt/package/nvram/src/main.c@ 0ea1f3f

/*
 * 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: main.c 3089 2006-01-31 15:22:43Z wbx $
 */

#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;
}