To ensure the file is readable

Question

In pset6, server.c,

what should I do to make sure the file is readable?

the problem set guide says it's possible to use "stat" or "access"?

since both return 0 on success and -1 if not, how do I know if the file is readable?

or can I use the return value 0 or -1 to determine if the file is readable?

Thanks!

Answer 1

This can be done by using "access", as suggested in the pset sheet.

e.g.

use

access(path, R_OK)

to check if the file is readable, and it'll return 0 if readable and return -1 if not.

consult manpage for more information.