File Permissions
 

How to check in a C Program

wheter the given filename can have the write permission or not...

for example
suppose if a program has to create a filename

ex: ./a.out -output /home/ravi/outfile.txt

has to be created then
how do we check wheter /home/ravi is a correct directory and it has writable permissions
in the program ????
any idea????

man access (if you just want permissions info) or info stat (if you want more detailed info) should tell you what you are looking for, if I understood what it was that you want.

hope this helps,
jrtayloriv

Usually you just try to create the file and see if fopen()/open() failed. If it fails because of permissions then errno will be set to EPERM.