Dear Friends!:
I've been compiling this code:
https://github.com/bsalunke/SysCallInterceptModule
and when executing make or ./compile.sh, it's report this error:
/MyPath/SysCallInterceptModule-master/Module/SysCallInterceptModule.c:244:12:
error: initialization of ‘ssize_t (*)(struct file *, char *, size_t,
loff_t *)’ {aka ‘long int (*)(struct file *, char *, long unsigned int,
long long int *)’} from incompatible pointer type ‘int (*)(struct file *,
char *, size_t, loff_t)’ {aka ‘int (*)(struct file *, char *, long
unsigned int, long long int)’} [-Werror=incompatible-pointer-types]
The error stops being reported if I replace line 244 with:
.read = (ssize_t (*)(struct file *, char *, size_t, loff_t *))
&device_read,
But was that really necessary? I went through all the source code and
couldn't find any other struct file_operations with a read function defined
this way:
int (*)(struct file *, char *, long unsigned int, long long int)’}
The error also didn't disappear if I declared the read function on line 147
as:
static ssize_t device_read(struct file* filep, char* buffer, size_t len,
loff_t offset){
I appreciate any explanation on why this occurs and / or any different
solutions to avoid the error. Personally, it doesn't seem very logical to
me.
