procfs.c


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#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "procfs.h"

int procfs_open(pid_t pid) {
	char path[2048];
	sprintf(path, "/proc/%d/mem", pid);
	return open(path, O_RDWR);
}

int read_page(int fd, uintptr_t index, uint8_t *data) {
	if (lseek(fd, index * PAGE_SIZE, SEEK_SET) == -1) 
		return -1;
	size_t n = 0;
	while (n < PAGE_SIZE) {
		ssize_t result = read(fd, data + n, PAGE_SIZE - n);
		if (result == -1) return -1;
		n += result;
	}
	return 0;
}