+ PARA_ERROR(EXIST, "file or directory already exists"), \
+ PARA_ERROR(ISDIR, "error: is a directory"), \
+ PARA_ERROR(NOENT, "no such file or directory"), \
+ PARA_ERROR(OPEN_PERM, "open error (permission denied)"), \
+ PARA_ERROR(MKDIR_PERM, "mkdir error (permission denied)"), \
+ PARA_ERROR(MKDIR, "failed to create directory"), \
+ PARA_ERROR(CHDIR, "failed to change directory"), \
+ PARA_ERROR(FCHDIR, "fchdir failed"), \
+ PARA_ERROR(OPENDIR, "can not open directory"), \
+ PARA_ERROR(NOSPC, "no space left on device"), \
+ PARA_ERROR(OPEN, "failed to open file"), \