34 lines
532 B
C
34 lines
532 B
C
|
#include <fcntl.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
int main(void){
|
||
|
|
int fd = open("./test/fileat", O_RDWR | O_SYNC);
|
||
|
|
|
||
|
|
if(fd == -1){
|
||
|
|
printf("Error in opening file fileat.\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
char buff[1024];
|
||
|
|
|
||
|
|
ssize_t rbit = read(fd, buff, 1024);
|
||
|
|
|
||
|
|
if(rbit > 0)
|
||
|
|
buff[rbit] = '\0';
|
||
|
|
|
||
|
|
printf("%ld %s\n", rbit, buff);
|
||
|
|
|
||
|
|
off_t off = lseek(fd, 0, SEEK_END);
|
||
|
|
|
||
|
|
printf("offset: %ld\n", off);
|
||
|
|
|
||
|
|
char buff2[32] = "Hello World!";
|
||
|
|
|
||
|
|
ssize_t wbit = write(fd, buff2, 13);
|
||
|
|
|
||
|
|
printf("wbit: %ld\n", wbit);
|
||
|
|
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|