[SOLVED] How to avoid overwriting a file

whirlpool · 09-06-2010, 07:46 AM

Hey,

I'm facing difficulty while writing to an already existing file . I'm making a shell (programming in C). I want a file (say , logfile) to keep a record of all the commands a user enters. For the first command it runs fine , but for the second time and thereafter it overwrites the previous contents. How do I avoid this?

Thanks
Ambika

druuna · 09-06-2010, 07:54 AM

Hi,

I'm not a C programmer, but like any other language it has the possibility to append rather then overwrite a file.

Feed your search engine with: programming C append to get dozens of links.

Hope this helps.

Aquarius_Girl · 09-06-2010, 08:00 AM

Use fopen() with append mode !
http://www.opengroup.org/onlinepubs/...ons/fopen.html

What function are you using for opening/writing files ?

whirlpool · 09-07-2010, 12:47 AM

Thanks for the help.
I used open and close commands. The problem was I was opening the file again and again using a for loop. Opening it only once and then appending it solved my problem.