blob: 93d813b71e2cf0848b585ca900025db5a8b11016 [file] [log] [blame]
* llseek.c
* On 32-bit platforms, we need to use the _llseek() system call
* rather than lseek(), to be able to handle large disks. _llseek()
* isn't just a normal syscall which takes a 64-bit argument; it needs
* to return a 64-bit value and so takes an extra pointer.
#include <unistd.h>
#include <sys/syscall.h>
#include <bitsize.h>
#if _BITSIZE == 32
extern int __llseek(int fd, unsigned long hi, unsigned long lo, off_t * res,
int whence);
off_t lseek(int fd, off_t offset, int whence)
off_t result;
int rv;
rv = __llseek(fd, (unsigned long)(offset >> 32), (unsigned long)offset,
&result, whence);
return rv ? (off_t) - 1 : result;