PRIMECLUSTER Global File Services Configuration and Administration Guide 4.5

1.8.23 Notes on lseek(2) with SEEK_DATA or SEEK_HOLE

When lseek(2) with SEEK_DATA or SEEK_HOLE is executed to a file on the GFS Shared File System, the behavior is as follows:

• When the specified offset does not exceed the end of the file

  • SEEK_DATA:

    Set the file offset to the specified offset.

  • SEEK_HOLE:

    Set the file offset to the end of the file.

• When the specified offset exceeds the end of the file

  lseek(2) fails (return code: -1, errno: ENXIO).

Information

• Specify SEEK_DATA and SEEK_HOLE in the third argument of lseek(2).

• Specify the offset in the second argument of lseek(2).