diff options
Diffstat (limited to 'package/system/utils/nvram/src/cli.c')
| -rw-r--r-- | package/system/utils/nvram/src/cli.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/package/system/utils/nvram/src/cli.c b/package/system/utils/nvram/src/cli.c new file mode 100644 index 0000000..66ef904 --- /dev/null +++ b/package/system/utils/nvram/src/cli.c @@ -0,0 +1,246 @@ +/* + * 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("Offset: 0x%08X\n", nvram->offset); + + 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") || !strcmp(argv[i], "unset") || !strcmp(argv[i], "set") ) + { + if( (i+1) < argc ) + { + switch(argv[i++][0]) + { + case 'g': + stat = do_get(nvram, argv[i]); + break; + + case 'u': + stat = do_unset(nvram, argv[i]); + break; + + case 's': + stat = do_set(nvram, argv[i]); + break; + } + done++; + } + else + { + fprintf(stderr, "Command '%s' requires an argument!\n", argv[i]); + done = 0; + break; + } + } + 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; +} |