60 	ulong env_size;			/* environment size */
62 	ulong env_sectors;		/* number of environment sectors */
107 struct environment {  struct
115 static struct environment environment = {  variable
312 			 * be able to successfully write environment later.  in ubi_read()
394  * Search the environment for a variable.
401 	for (env = environment.data; *env; env = nxt + 1) {  in fw_getenv()
405 			if (nxt >= &environment.data[ENV_SIZE]) {  in fw_getenv()
407 					"environment not terminated\n");  in fw_getenv()
420  * Search the default environment for a variable.
433 					"default environment not terminated\n");  in fw_getdefenv()
447  * environment variables
467 		for (env = environment.data; *env; env = nxt + 1) {  in fw_printenv()
469 				if (nxt >= &environment.data[ENV_SIZE]) {  in fw_printenv()
471 						"environment not terminated\n");  in fw_printenv()
514 	*environment.crc = crc32(0, (uint8_t *) environment.data, ENV_SIZE);  in fw_env_flush()
516 	/* write environment back to flash */  in fw_env_flush()
526  * Set/Clear a single variable in the environment.
527  * This is called in sequence to update the environment
540 	for (nxt = env = environment.data; *env; env = nxt + 1) {  in fw_env_write()
542 			if (nxt >= &environment.data[ENV_SIZE]) {  in fw_env_write()
544 					"environment not terminated\n");  in fw_env_write()
617 	for (env = environment.data; *env || *(env + 1); ++env)  in fw_env_write()
619 	if (env > environment.data)  in fw_env_write()
623 	 * "name" + "=" + "val" +"\0\0"  > CUR_ENVSIZE - (env-environment)  in fw_env_write()
629 	if (len > (&environment.data[ENV_SIZE] - env)) {  in fw_env_write()
631 			"Error: environment overflow, \"%s\" deleted\n", name);  in fw_env_write()
648  * Deletes or sets environment variables. Returns -1 and sets errno error codes:
675 		fprintf(stderr, "Error: environment not initialized\n");  in fw_env_set()
752 		fprintf(stderr, "Error: environment not initialized\n");  in fw_parse_script()
820 		 * try to save the environment and returns an error  in fw_parse_script()
845  * environment_end() - compute offset of first byte right after environment
848  *  device offset of first byte right after environment
852 	/* environment is block aligned */  in environment_end()
965  * Write count bytes from begin of environment, but stay within
991 	 * For mtd devices only offset and size of the environment do matter  in flash_write_buf()
1023 	 * area to be erased, replace the environment image, write the whole  in flash_write_buf()
1052 		/* Overwrite the old environment */  in flash_write_buf()
1164 	switch (environment.flag_scheme) {  in flash_write()
1168 		(*environment.flags)++;  in flash_write()
1171 		*environment.flags = active_flag;  in flash_write()
1175 			environment.flag_scheme);  in flash_write()
1180 	fprintf(stderr, "Writing new environment at 0x%llx on %s\n",  in flash_write()
1187 		return ubi_write(fd_target, environment.image, CUR_ENVSIZE);  in flash_write()
1190 	rc = flash_write_buf(dev_target, fd_target, environment.image,  in flash_write()
1195 	if (environment.flag_scheme == FLAG_BOOLEAN) {  in flash_write()
1201 			"Setting obsolete flag in environment at 0x%llx on %s\n",  in flash_write()
1217 		return ubi_read(fd, environment.image, CUR_ENVSIZE);  in flash_read()
1220 	rc = flash_read_buf(dev_current, fd, environment.image, CUR_ENVSIZE,  in flash_read()
1408 			"Not enough memory for environment (%ld bytes)\n",  in fw_env_open()
1414 	/* read environment from FLASH to local buffer */  in fw_env_open()
1415 	environment.image = addr0;  in fw_env_open()
1419 		environment.crc = &redundant->crc;  in fw_env_open()
1420 		environment.flags = &redundant->flags;  in fw_env_open()
1421 		environment.data = redundant->data;  in fw_env_open()
1424 		environment.crc = &single->crc;  in fw_env_open()
1425 		environment.flags = NULL;  in fw_env_open()
1426 		environment.data = single->data;  in fw_env_open()
1435 	crc0 = crc32(0, (uint8_t *)environment.data, ENV_SIZE);  in fw_env_open()
1437 	crc0_ok = (crc0 == *environment.crc);  in fw_env_open()
1441 				"Warning: Bad CRC, using default environment\n");  in fw_env_open()
1442 			memcpy(environment.data, default_environment,  in fw_env_open()
1446 		flag0 = *environment.flags;  in fw_env_open()
1452 				"Not enough memory for environment (%ld bytes)\n",  in fw_env_open()
1460 		 * have to set environment.image for flash_read(), careful -  in fw_env_open()
1461 		 * other pointers in environment still point inside addr0  in fw_env_open()
1463 		environment.image = addr1;  in fw_env_open()
1472 			environment.flag_scheme = FLAG_BOOLEAN;  in fw_env_open()
1475 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1478 			environment.flag_scheme = FLAG_BOOLEAN;  in fw_env_open()
1481 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1485 			environment.flag_scheme = FLAG_INCREMENTAL;  in fw_env_open()
1503 				"Warning: Bad CRC, using default environment\n");  in fw_env_open()
1504 			memcpy(environment.data, default_environment,  in fw_env_open()
1508 			switch (environment.flag_scheme) {  in fw_env_open()
1537 					environment.flag_scheme);  in fw_env_open()
1548 			environment.image = addr1;  in fw_env_open()
1549 			environment.crc = &redundant->crc;  in fw_env_open()
1550 			environment.flags = &redundant->flags;  in fw_env_open()
1551 			environment.data = redundant->data;  in fw_env_open()
1554 			environment.image = addr0;  in fw_env_open()
1575  * Simply free allocated buffer with environment
1579 	if (environment.image)  in fw_env_close()
1580 		free(environment.image);  in fw_env_close()
1582 	environment.image = NULL;  in fw_env_close()
1666 		/* Assume enough sectors to cover the environment */  in check_device_config()
1671 			"Environment does not start on (erase) block boundary\n");  in check_device_config()
1678 			"Environment does not fit into available sectors\n");  in check_device_config()