reading a file that doesn't exist
- by John
Hi,
I have got a small program that prints the contents of files using the system call - read.
unsigned char buffer[8];
size_t offset=0;
size_t bytes_read;
int i;
int fd = open(argv[1], O_RDONLY);
do{
bytes_read = read(fd, buffer, sizeof(buffer));
printf("0x%06x : ", offset);
for(i=0; i<bytes_read; ++i)
{
printf("%c ", buffer[i]);
}
printf("\n");
offset = offset + bytes_read;
}while(bytes_read == sizeof(buffer));
Now while running I give a file name that doesn't exist.
It prints some kind of data mixed with environment variables and a segmentation fault at the end.
How is this possible? What is the program printing?
Thanks,
John
