#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/shm.h>

#include <stdio.h>

#include <errno.h>

#include <stdlib.h>

int main()

{

char* code;

int shmid;

int len;

char pathname[] = "task2_w.c";

key_t key;

FILE *file;

file = fopen(pathname, "r");

fseek(file, 0L, SEEK_END);

len = ftell(file);

rewind(file);

int *size;

if((key = ftok(pathname,0)) < 0){

printf("Can\'t generate key\n");

exit(-1);

}

if((shmid = shmget(key, sizeof(int) + len * sizeof(char), 0666|IPC_CREAT|IPC_EXCL)) < 0){

if(errno != EEXIST){

printf("Can\'t create shared memory\n");

exit(-1);

} else {

if((shmid = shmget(key, sizeof(int) + len * sizeof(char), 0)) < 0){

printf("Can\'t find shared memory\n");

exit(-1);

}

}

}

if((size = (int *)shmat(shmid, NULL, 0)) == (int *)(-1)){

printf("Can't attach shared memory\n");

exit(-1);

}

*size = len;

code = (char*)(size + 1);

for (int i = 0; i < len; ++i) {

code[i] = fgetc(file);

}

if(shmdt(size) < 0){

printf("Can't detach shared memory\n");

exit(-1);

}

return 0;

}