/proc/PID/statm을 읽어서 자기자신의 메모량을 알고 싶은데요

/proc/PID/statm을 읽어서 자기자신의 메모량을 알고 싶은데요
구체적으로 그거의 단위를 알고 싶습니다
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/proc/PID/statm의 내용

The total process size
The size of the process resident in physical memory
The memory shared with other processes—that is, memory mapped both by this process and at least one other (such as shared libraries or untouched copyon-write pages)
The text size of the process—that is, the size of loaded executable code
The size of shared libraries mapped into this process
The memory used by this process for its stack
The number of dirty pages—that is, pages of memory that have been modified by the program
*********************************

그래서 첫번째 값만 출력하는 프로그램을 작성했는데요
그게 단순 byte인지 아님 atoi로 변환해야되는지 알려주세요
단위를 모르겠습니다
==============제가 짠 소스입니다=======================================

#include
#include
#include
#include

int main(int argc,char **argv){
FILE *meminfo;
int mem;
char item[100],path[20],*point;

pid_t pid;
pid=getpid();

printf("getpid():%d\n",pid);
sprintf(path,"/proc/%d/statm",pid);
printf("path:%s\n",path);

meminfo=fopen(path,"r");

if(meminfo == NULL){
printf("file is empty!!!\n");
exit(1);
}

fscanf(meminfo,"%s",item);
point=strtok(item," ");
printf("ID:%d MemSize:%s\n",pid,point);

fclose(meminfo);

return 0;
}