write a log file with 4ge

patriceguic · #1 (**permalink**) 05-07-07, 10:19

Hello,

I want to write into a file during the execution of my 4ge.
But i don't know how open a file and how write into a file.

thank for your reply.

artemka · #2 (**permalink**) 05-11-07, 15:22

use a RUN function in your code, create a string and have it say something like "echo (your text here) >> /tmp/log_file"
and then in 4gl
RUN string

I have not used 4gl in a while but i think it should work

Tyveleyn · #3 (**permalink**) 05-13-07, 06:35

Hi,

You can write text to stdout with the DISPLAY statement. During execution the stdout of the program can be redirected into a file on the command line.
Another way to write to file with a 4GL program is to define a REPORT function and make calls in the program to it with every line of output. E.g.

Code:

REPORT tab_fld (result)     
DEFINE result CHAR(603)     
                               
OUTPUT                         
    LEFT MARGIN 0              
    RIGHT MARGIN 0             
    TOP MARGIN 0               
    BOTTOM MARGIN 0            
    PAGE LENGTH 1              
                               
FORMAT                         
    ON EVERY ROW               
        PRINT result CLIPPED
END REPORT

This report has to be invoked in the program with something like:

Code:

OUTPUT TO REPORT tab_fld (textstring)

And around the program part that contains the OUTPUT TO statements you have to call:

Code:

START REPORT tab_fld TO "fullpathname/filename"

and:

Code:

FINISH REPORT tab_fld

Regards

Internet Services

Web Development

Digital Marketing

Consumer Tech