os/src/lseek.c


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#include <reent.h>
#include <osdebug.h>
#include <errno.h>
#include "fio.h"

_off_t _lseek_r(struct _reent * reent, int fd, _off_t seek, int wheel) {
    off_t r;
    
    if ((wheel != SEEK_SET) && (wheel != SEEK_CUR) && (wheel != SEEK_END)) {
        reent->_errno = EINVAL;
        return -1;
    }
    
    if (!fio_is_open(fd)) {
        reent->_errno = EBADF;
        return -1;
    }
    
    r = fio_seek(fd, seek, wheel);
    
    if (r < 0)
        reent->_errno = EINVAL;
    
    return r;
}