About the failure to read and write Nvram (IMEI SVN) under Recovery mode

The requirement needs to read and write the IMEI svn under recovery, but the related nodes are not successful through the read/write NVRAM operation, the following main implementation code and compiler exception, and when communicating with colleagues know that even if it can be compiled through and cannot call libnvram.so related functions. If there is a great God passing by, please advise twos.

Implementation code:

#include ". /.. /.. /.. /external/nvram/libnvram/libnvram.h "//here has introduced the relevant header file # include" Libnvram.h "#include" cfg_product_info_file.h "// Struct#include "Custom_nvram_lid.h"//lid#include "Cfg_module_file.h"//module

int Read_write () {int result;    F_ID imei_imeisv_nvram_id;    int test_fd;    int rec_size;    int rec_num;    nvram_ef_imei_imeisv_struct* imei_imeisv_struct;    BOOL Isread = True,iswrite = false;    printf ("read:\n"); imei_imeisv_nvram_id = Nvm_getfiledesc (Ap_cfg_reeb_product_info_lid, &rec_size, &rec_num,IsRead);//IsRead=        True if (Imei_imeisv_nvram_id.ifiledesc < 0) {printf ("Nvm_getfiledesc failed\n");    return 0;    } result = read (imei_imeisv_nvram_id.ifiledesc,&imei_imeisv_struct,rec_num*rec_size);        if (Result! = rec_num*rec_size) {printf ("Get file failed\n");    return 0;    } printf ("---------read---------\ n");    printf ("svn:%s\n", IMEI_IMEISV_STRUCT-&GT;SVN);    Ui->print ("svn:%s\n", IMEI_IMEISV_STRUCT-&GT;SVN);    printf ("------------------\ n"); if (!    Nvm_closefiledesc (imei_imeisv_nvram_id)) {printf ("Nvm_closefiledesc failed\n");    } printf ("write:\n"); imei_imeisv_nvram_id = Nvm_getfiledesc (ap_cfg_reEb_product_info_lid, &rec_size, &rec_num,iswrite)//iswrite=false if (Imei_imeisv_nvram_id.ifiledesc < 0)        {printf ("Nvm_getfiledesc failed\n");    return 0;    } IMEI_IMEISV_STRUCT-&GT;SVN = 55;    printf ("--------write----------\ n");    result = Write (imei_imeisv_nvram_id.ifiledesc,&imei_imeisv_struct,rec_num*rec_size);        if (Result! = rec_num*rec_size) {printf ("Write file failed\n");    return 0; } if (!    Nvm_closefiledesc (imei_imeisv_nvram_id)) {printf ("Nvm_closefiledesc failed\n"); } return 0;}

ANDROID.MK Related changes:

Local_c_includes: = $ (mtk_path_source)/external/nvram/libnvramlocal_shared_libraries: = Libnvram

The following is a compilation exception:

bootable/recovery/recovery.cpp:2088:error:undefined reference to ' Nvm_getfiledesc ' bootable/recovery/recovery.cpp : 2104:error:undefined reference to ' Nvm_closefiledesc ' bootable/recovery/recovery.cpp:2109:error:undefined Reference to ' Nvm_getfiledesc ' bootable/recovery/recovery.cpp:2121:error:undefined reference to ' nvm_ Closefiledesc ' Collect2:error:ld returned 1 exit status

Failed to read and write Nvram (IMEI SVN) under Recovery mode