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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/mman.h>
#include "nvram.h"
static nvram_handle_t * nvram_open_rdonly(void)
{
const char *file = nvram_find_staging();
if( file == NULL )
file = nvram_find_mtd();
if( file != NULL )
return nvram_open(file, NVRAM_RO);
return NULL;
}
static nvram_handle_t * nvram_open_staging(void)
{
if( nvram_find_staging() != NULL || nvram_to_staging() == 0 )
return nvram_open(NVRAM_STAGING, NVRAM_RW);
return NULL;
}
static int do_show(nvram_handle_t *nvram)
{
nvram_tuple_t *t;
int stat = 1;
if( (t = nvram_getall(nvram)) != NULL )
{
while( t )
{
printf("%s=%s\n", t->name, t->value);
t = t->next;
}
stat = 0;
}
return stat;
}
static int do_get(nvram_handle_t *nvram, const char *var)
{
const char *val;
int stat = 1;
if( (val = nvram_get(nvram, var)) != NULL )
{
printf("%s\n", val);
stat = 0;
}
return stat;
}
static int do_unset(nvram_handle_t *nvram, const char *var)
{
return nvram_unset(nvram, var);
}
static int do_set(nvram_handle_t *nvram, const char *pair)
{
char *val = strstr(pair, "=");
char var[strlen(pair)];
int stat = 1;
if( val != NULL )
{
memset(var, 0, sizeof(var));
strncpy(var, pair, (int)(val-pair));
stat = nvram_set(nvram, var, (char *)(val + 1));
}
return stat;
}
int main( int argc, const char *argv[] )
{
nvram_handle_t *nvram;
int commit = 0;
int write = 0;
int stat = 1;
int i;
/* Ugly... iterate over arguments to see whether we can expect a write */
for( i = 1; i < argc; i++ )
if( ( !strcmp(argv[i], "set") && ++i < argc ) ||
( !strcmp(argv[i], "unset") && ++i < argc ) ||
!strcmp(argv[i], "commit") )
{
write = 1;
break;
}
if( (nvram = write ? nvram_open_staging() : nvram_open_rdonly()) != NULL )
{
for( i = 1; i < argc; i++ )
{
if( !strcmp(argv[i], "show") )
{
stat = do_show(nvram);
}
else if( !strcmp(argv[i], "get") && ++i < argc )
{
stat = do_get(nvram, argv[i]);
}
else if( !strcmp(argv[i], "unset") && ++i < argc )
{
stat = do_unset(nvram, argv[i]);
}
else if( !strcmp(argv[i], "set") && ++i < argc )
{
stat = do_set(nvram, argv[i]);
}
else if( !strcmp(argv[i], "commit") )
{
commit = 1;
}
else
{
fprintf(stderr,
"Usage:\n"
" nvram show\n"
" nvram get variable\n"
" nvram set variable=value [set ...]\n"
" nvram unset variable [unset ...]\n"
" nvram commit\n"
);
return 1;
}
}
if( write )
stat = nvram_commit(nvram);
nvram_close(nvram);
if( commit )
stat = staging_to_nvram();
}
return stat;
}
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