+/*
+ * Command line interface for libnvram
+ *
+ * Copyright 2009, Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *
+ * The libnvram code is based on Broadcom code for Linux 2.4.x .
+ *
+ */
+
+#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;
+}
+
+static int do_info(nvram_handle_t *nvram)
+{
+ nvram_header_t *hdr = nvram_header(nvram);
+
+ /* CRC8 over the last 11 bytes of the header and data bytes */
+ uint8_t crc = hndcrc8((unsigned char *) &hdr[0] + NVRAM_CRC_START_POSITION,
+ hdr->len - NVRAM_CRC_START_POSITION, 0xff);
+
+ /* Show info */
+ printf("Magic: 0x%08X\n", hdr->magic);
+ printf("Length: 0x%08X\n", hdr->len);
+
+ printf("CRC8: 0x%02X (calculated: 0x%02X)\n",
+ hdr->crc_ver_init & 0xFF, crc);
+
+ printf("Version: 0x%02X\n", (hdr->crc_ver_init >> 8) & 0xFF);
+ printf("SDRAM init: 0x%04X\n", (hdr->crc_ver_init >> 16) & 0xFFFF);
+ printf("SDRAM config: 0x%04X\n", hdr->config_refresh & 0xFFFF);
+ printf("SDRAM refresh: 0x%04X\n", (hdr->config_refresh >> 16) & 0xFFFF);
+ printf("NCDL values: 0x%08X\n\n", hdr->config_ncdl);
+
+ printf("%i bytes used / %i bytes available (%.2f%%)\n",
+ hdr->len, NVRAM_SPACE - hdr->len,
+ (100.00 / (double)NVRAM_SPACE) * (double)hdr->len);
+
+ return 0;
+}
+
+
+int main( int argc, const char *argv[] )
+{
+ nvram_handle_t *nvram;
+ int commit = 0;
+ int write = 0;
+ int stat = 1;
+ int done = 0;
+ 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;
+ }
+
+
+ nvram = write ? nvram_open_staging() : nvram_open_rdonly();
+
+ if( nvram != NULL && argc > 1 )
+ {
+ for( i = 1; i < argc; i++ )
+ {
+ if( !strcmp(argv[i], "show") )
+ {
+ stat = do_show(nvram);
+ done++;
+ }
+ else if( !strcmp(argv[i], "info") )
+ {
+ stat = do_info(nvram);
+ done++;
+ }
+ else if( !strcmp(argv[i], "get") && ++i < argc )
+ {
+ stat = do_get(nvram, argv[i]);
+ done++;
+ }
+ else if( !strcmp(argv[i], "unset") && ++i < argc )
+ {
+ stat = do_unset(nvram, argv[i]);
+ done++;
+ }
+ else if( !strcmp(argv[i], "set") && ++i < argc )
+ {
+ stat = do_set(nvram, argv[i]);
+ done++;
+ }
+ else if( !strcmp(argv[i], "commit") )
+ {
+ commit = 1;
+ done++;
+ }
+ else
+ {
+ fprintf(stderr, "Unknown option '%s' !\n", argv[i]);
+ done = 0;
+ break;
+ }
+ }
+
+ if( write )
+ stat = nvram_commit(nvram);
+
+ nvram_close(nvram);
+
+ if( commit )
+ stat = staging_to_nvram();
+ }
+
+ if( !nvram )
+ {
+ fprintf(stderr,
+ "Could not open nvram! Possible reasons are:\n"
+ " - No device found (/proc not mounted or no nvram present)\n"
+ " - Insufficient permissions to open mtd device\n"
+ " - Insufficient memory to complete operation\n"
+ " - Memory mapping failed or not supported\n"
+ );
+
+ stat = 1;
+ }
+ else if( !done )
+ {
+ fprintf(stderr,
+ "Usage:\n"
+ " nvram show\n"
+ " nvram info\n"
+ " nvram get variable\n"
+ " nvram set variable=value [set ...]\n"
+ " nvram unset variable [unset ...]\n"
+ " nvram commit\n"
+ );
+
+ stat = 1;
+ }
+
+ return stat;
+}
projects / openwrt.git / blobdiff