code. compile. run. debug. share.
#include<stdio.h>
#include<sys/types.h>
#include<sys/mman.h>
#include<unistd.h>
#include<fcntl.h>
#include<string.h>
#include <sys/stat.h>
int main() {
int fd;
unsigned char *filedata = NULL, *tmp;
fd = open("test.txt", O_RDWR);
struct stat fileInfo = {0};
if (fstat(fd, &fileInfo) == -1)
{
perror("Error getting the file size");
return -1;
}
if (fileInfo.st_size == 0)
{
printf("Error: File is empty\n");
return -1;
}
filedata = mmap(NULL, fileInfo.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(!filedata) {
perror("mmap");
close(fd);
return -1;
}
printf("%s", filedata);
if (munmap(filedata, fileInfo.st_size) == -1)
{
close(fd);
perror("munmap");
return -1;
}
close(fd);
return 0;
}
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Compiling Program...
Standard Input:
Interactive Console
Text
Program is not being debugged. Click "Debug" button to start program in debug mode.
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