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  */
  13
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17
  18 #include <typedefs.h>
  19 #include <bcmnvram.h>
  20
  21 static void
  22 usage(void)
  23 {
  24         fprintf(stderr, "usage: nvram [get name] [set name=value] [unset name] [commit] [show]\n");
  25         exit(0);
  26 }
  27
  28 /* hack for some PMON default nvram values which have '\r' appended */
  29 void
  30 puts_trim_cr(char *str)
  31 {
  32         int len= strlen(str);
  33         if (len && (str[len-1] == '\r')) len--;
  34         printf("%.*s\n", len, str);
  35 }
  36
  37 /* NVRAM utility */
  38 int
  39 main(int argc, char **argv)
  40 {
  41         char *name, *value, buf[NVRAM_SPACE];
  42         int size;
  43
  44         /* Skip program name */
  45         --argc;
  46         ++argv;
  47
  48         if (!*argv)
  49                 usage();
  50
  51         /* Process the remaining arguments. */
  52         for (; *argv; argv++) {
  53                 if (!strncmp(*argv, "get", 3)) {
  54                         if (*++argv) {
  55                                 if ((value = nvram_get(*argv))) {
  56                                         puts_trim_cr(value);
  57                                 }
  58                         }
  59                 }
  60                 else if (!strncmp(*argv, "set", 3)) {
  61                         if (*++argv) {
  62                                 strncpy(value = buf, *argv, sizeof(buf));
  63                                 name = strsep(&value, "=");
  64                                 nvram_set(name, value);
  65                         }
  66                 }
  67                 else if (!strncmp(*argv, "unset", 5)) {
  68                         if (*++argv)
  69                                 nvram_unset(*argv);
  70                 }
  71                 else if (!strncmp(*argv, "commit", 5)) {
  72                         nvram_commit();
  73                 }
  74                 else if (!strncmp(*argv, "show", 4) ||
  75                            !strncmp(*argv, "getall", 6)) {
  76                         nvram_getall(buf, sizeof(buf));
  77                         for (name = buf; *name; name += strlen(name) + 1)
  78                                 puts_trim_cr(name);
  79                         size = sizeof(struct nvram_header) + (int) name - (int) buf;
  80                         fprintf(stderr, "size: %d bytes (%d left)\n", size, NVRAM_SPACE - size);
  81                 }
  82                 if (!*argv)
  83                         break;
  84         }
  85
  86         return 0;
  87 }