topic Re: Using system functions in Application Development and Automation Discussions

Using system functions

Former Member — Fri, 07 Jan 2011 05:12:42 GMT

Hi ,

I am a beginner,and i can't understand the usage of the following system functions,

call 'C_DIR_READ_FINISH'

id 'ERRNO' field file_list-errno

id 'ERRMSG' field file_list-errmsg.

call 'C_DIR_READ_START' id 'DIR' field p_path

id 'FILE' field p_file

id 'ERRNO' field file-errno

id 'ERRMSG' field file-errmsg.

call 'C_DIR_READ_NEXT'

id 'TYPE' field file-type

id 'NAME' field file-name

id 'LEN' field file-len

id 'OWNER' field file-owner

id 'MTIME' field file-mtime

id 'MODE' field file-mode

id 'ERRNO' field file-errno

id 'ERRMSG' field file-errmsg.Please help...

Re: Using system functions

Former Member — Fri, 07 Jan 2011 06:01:13 GMT

HI kumaar,

System functions are internally implemented using C language, the implementation is hidden. We can neither see what it does nor is it adequetely documented.

We should not use the 'CALL' command as it is for internal use only. Suggest using the function modules instead.

The functions that you have mentioned are used to read the application server files at the path passed as parameter.


''C_DIR_READ_START' 
 'C_DIR_READ_NEXT'
'C_DIR_READ_FINISH'

Hope this helps you.

Regards

Hema

Re: Using system functions

Former Member — Fri, 07 Jan 2011 06:30:04 GMT

Thanks Hema...