alsiva_app.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "driver.h"
#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/pci.h>

#define WR_VALUE _IOW('a','a',int32_t*)
#define RD_VALUE _IOR('a','b',char[])


int main()
{
    int fd;
    int32_t number;
    printf("***Alexey Ivanov Lab 2 OS***\n");


    printf("\nOpening Driver\n");
    fd = open("/dev/etx_device", O_RDWR);
    if(fd < 0) {
        printf("Cannot open device file...\n");
        return 0;
    }

    printf("Enter pid to send\n");
    scanf("%d",&number);
    printf("Writing Value to Driver\n");
    ioctl(fd, WR_VALUE, (int32_t*) &number);

    struct vm_area_struct_info value;
    if (ioctl(fd, IOCTL_READ_VM_AREA_STRUCT, &value) < 0) {
      perror("[ERROR]: ioctl");
      exit(EXIT_FAILURE);
    }
    printf("%s: received ", "READ_VM_AREA_STRUCT");

    printf("vm_area_struct_info : ");
    printf("vm_start = %hu\n", value.vm_start);
    printf("vm_end = %hu\n", value.vm_end);
    printf("vm_flags = %hu\n", value.vm_flags);
    printf("vm_pgoff = %hu\n", value.vm_pgoff);
    printf("rb_subtree_gap = %hu\n", value.rb_subtree_gap);



    struct pci_device_info data;
    if (ioctl(fd, IOCTL_READ_PCI_DEVICE_INFO, &data) < 0) {
      perror("[ERROR]: ioctl");
      exit(EXIT_FAILURE);
    }
    printf("%s: received ", "READ_VM_AREA_STRUCT");

    printf("pci_device_info : ");
    printf("vendor = %hu\n", data.vendor);
    printf("device = %hu\n", data.device);
    printf("devfn = %hu\n", data.devfn);
    printf("pin = %hu\n", data.pin);
    printf("pci_class = %hu\n", data.pci_class);
    printf("revision = %hu\n", data.revision);


    close(fd);

return;
}