企业网站 带后台,wordpress搭建技术论坛,推广外包,有没有专门做建筑造价的私单网站很久没有记录了#xff0c;持之以恒做一件事#xff0c;需要一定的毅力呐#xff01; 最近遇到了一个需求#xff0c;要求恢复出厂设置保留内置sd卡下某个目录的文件。思来想去#xff0c;从驱动那边备份校准信号文件得到了一些思路。因为带通话设置的装置需要进行校准持之以恒做一件事需要一定的毅力呐 最近遇到了一个需求要求恢复出厂设置保留内置sd卡下某个目录的文件。思来想去从驱动那边备份校准信号文件得到了一些思路。因为带通话设置的装置需要进行校准我们会将校准的文件保存在/data下。具体做法呢在执行恢复出厂设置时将此文件copy到tmp分区然后在恢复完成时再次copy回/data分区。因为我们是备份文件夹所以我们需要对copy函数进行修改。下面贴出部分代码。
diff --git a/bootable/recovery/recovery.cpp b/bootable/recovery/recovery.cpp
index 598840c..3693cf1 100644
--- a/bootable/recovery/recovery.cppb/bootable/recovery/recovery.cpp-111,6 111,8 static const char *OTA_FLAG_FILE /cache/recovery/last_ota_flag;#ifdef STK_BACKUP_OFFSET//要备份的文件夹
static const char *BACKUP_APK_PATH /system/third;//临时存储路径
static const char *TEMP_APK_BACKUP_PATH /tmp/third_app;#endif// Number of lines per page when displaying a file on screen-286,6 288,116 static int stk_copy_file(const char *src,const char *dstFilePath)printf(stk_copy_file end src%s,dst%s\n,src,dstFilePath);return 0;}
//拷贝文件夹的主体函数
void error_quit(const char *msg)
{perror(msg);//printf(something is error %s \n,msg);
}void change_path(const char *path)
{printf(Leave %s Successed . . .\n,getcwd(NULL,0));if(chdir(path)-1){error_quit(path);printf(chdir(path)-1 %s \n,path);return;}printf(Entry %s Successed . . .\n,getcwd(NULL,0));
}void _copy_file(const char *old_path,const char *new_path)
{FILE *in,*out;size_t len;char buf[64];char *pgetcwd(NULL,0);if((infopen(old_path,rb))NULL){error_quit(old_path);printf((infopen(old_path %s \n,old_path);return;}change_path(new_path);if((outfopen(old_path,wb))NULL){error_quit(old_path);printf(outfopen(old_path %s \n,old_path);return;}while(!feof(in)){bzero(buf,sizeof(buf));lenfread(buf,1,sizeof(buf)-1,in);fwrite(buf,len,1,out);}fclose(in);fclose(out);change_path(p);
}char *get_rel_path(const char *dir,const char *path)
{char *rel_path;unsigned long d_len,p_len;d_lenstrlen(dir);p_lenstrlen(path);bzero(rel_path,d_lenp_len2);strncpy(rel_path,path,p_len);strncat(rel_path,/,sizeof(char));strncat(rel_path,dir,d_len);return rel_path;
}void copy_dir(const char *old_path,const char *new_path)
{DIR *dir;struct stat buf;struct dirent *dirp;char *pgetcwd(NULL,0);if((diropendir(old_path))NULL){error_quit(old_path);printf(diropendir(old_path) %s \n,old_path);return;}if(mkdir(new_path,0777)-1){error_quit(new_path);printf(mkdir(new_path %s \n,new_path);return;}change_path(old_path);while((dirpreaddir(dir))){if(strcmp(dirp-d_name,.)0 || strcmp(dirp-d_name,..)0)continue;if(stat(dirp-d_name,buf)-1){error_quit(stat);printf(stat(dirp-d_name %s \n,stat);return;}if(S_ISDIR(buf.st_mode)){copy_dir(dirp-d_name,get_rel_path(dirp-d_name,new_path));continue;}_copy_file(dirp-d_name,new_path);}closedir(dir);change_path(p);
}#endif// command line args come from, in decreasing precedence:// - the actual command line-1326,6 1438,7 main(int argc, char **argv) {}#ifdef STK_BACKUP_OFFSET//在开始进入恢复出厂时进行一次拷贝copy_dir(BACKUP_APK_PATH,TEMP_APK_BACKUP_PATH);#endifdevice-StartRecovery();property_get(UserVolumeLabel, gVolume_label, );-1567,8 1680,11 main(int argc, char **argv) {finish_recovery(send_intent);#ifdef STK_BACKUP_OFFSET//在恢复出厂完成时我们再次将其拷贝回来copy_dir(TEMP_APK_BACKUP_PATH,BACKUP_APK_PATH);//赋予权限操作chmod(BACKUP_APK_PATH, 0666);chown(BACKUP_APK_PATH, 1000, 1000); // system system#endif#ifdef FOTA_UPDATE_SUPPORTif (perform_fota 1) {我们只要重点关注在finish_recovery(send_intent);与device-StartRecovery();这两个函数身上即可。我测试过直接从/mnt/sdcard下拷贝这样是不行的。因为在执行恢复出厂设置时这个分区此时还未挂载我通过代码让其先挂载但是无效。当然也可能在恢复出厂设置时我们所要备份的文件夹并不存在所以贴出代码片中的一些判空都进行了return。否则会无法开机串口log一直重复打印log。 如果各位有其他办法欢迎留言。有不对之处欢迎指出。
