openwrt/package/nvram/src/main.c

   1 /*
   2  * Frontend command-line utility for Linux NVRAM layer
   3  *
   4  * Copyright 2004, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  * $Id$
  13  */
  14
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18
  19 #include <typedefs.h>
  20 #include <bcmnvram.h>
  21
  22 static void
  23 usage(void)
  24 {
  25         fprintf(stderr, "usage: nvram [get name] [set name=value] [unset name] [show]\n");
  26         exit(0);
  27 }
  28
  29 /* hack for some PMON default nvram values which have '\r' appended */
  30 void
  31 puts_trim_cr(char *str)
  32 {
  33         int len= strlen(str);
  34         if (len && (str[len-1] == '\r')) len--;
  35         printf("%.*s\n", len, str);
  36 }
  37
  38 /* NVRAM utility */
  39 int
  40 main(int argc, char **argv)
  41 {
  42         char *name, *value, buf[NVRAM_SPACE];
  43         int size;
  44
  45         /* Skip program name */
  46         --argc;
  47         ++argv;
  48
  49         if (!*argv)
  50                 usage();
  51
  52         /* Process the remaining arguments. */
  53         for (; *argv; argv++) {
  54                 if (!strncmp(*argv, "get", 3)) {
  55                         if (*++argv) {
  56                                 if ((value = nvram_get(*argv))) {
  57                                         puts_trim_cr(value);
  58                                 }
  59                         }
  60                 }
  61                 else if (!strncmp(*argv, "set", 3)) {
  62                         if (*++argv) {
  63                                 strncpy(value = buf, *argv, sizeof(buf));
  64                                 name = strsep(&value, "=");
  65                                 nvram_set(name, value);
  66                         }
  67                 }
  68                 else if (!strncmp(*argv, "unset", 5)) {
  69                         if (*++argv)
  70                                 nvram_unset(*argv);
  71                 }
  72                 else if (!strncmp(*argv, "commit", 5)) {
  73                         nvram_commit();
  74                 }
  75                 else if (!strncmp(*argv, "show", 4) ||
  76                            !strncmp(*argv, "getall", 6)) {
  77                         nvram_getall(buf, sizeof(buf));
  78                         for (name = buf; *name; name += strlen(name) + 1)
  79                                 puts_trim_cr(name);
  80                         size = sizeof(struct nvram_header) + (int) name - (int) buf;
  81                         fprintf(stderr, "size: %d bytes (%d left)\n", size, NVRAM_SPACE - size);
  82                 }
  83                 if (!*argv)
  84                         break;
  85         }
  86
  87         return 0;
  88 }