| /contrib/sdk/sources/newlib/libc/sys/lseek.c |
|---|
| 0,0 → 1,51 |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <sys/unistd.h> |
| #include <sys/kos_io.h> |
| #include "glue.h" |
| #include "io.h" |
| _off_t |
| _DEFUN (lseek, (fd, pos, whence), |
| int fd _AND |
| _off_t pos _AND |
| int whence) |
| { |
| fileinfo_t info; |
| __io_handle *ioh; |
| _off_t ret; |
| if( (fd < 0) || (fd >=64) ) |
| { |
| errno = EBADF; |
| return (-1); |
| }; |
| ioh = &__io_tab[fd]; |
| switch(whence) |
| { |
| case SEEK_SET: |
| ret = pos; |
| break; |
| case SEEK_CUR: |
| ret = ioh->offset + pos; |
| break; |
| case SEEK_END: |
| { |
| get_fileinfo(ioh->name, &info); |
| ret = pos + info.size; |
| break; |
| } |
| default: |
| errno = EINVAL; |
| return (-1); |
| }; |
| ioh->offset = ret; |
| return( ret ); |
| }; |