Eric Lee / smarc-fsl-linux-kernel

26 Mar, 2018

1 commit

  • a670b0b4a   kbuild: Use ls(1) instead of stat(1) to obtain file size ... Browse Code ยป

    stat(1) is not standardized and different implementations have their own
    (conflicting) flags for querying the size of a file.

    ls(1) provides the same information (value of st.st_size) in the 5th
    column, except when the file is a character or block device. This output
    is standardized[0]. The -n option turns on -l, which writes lines
    formatted like

    "%s %u %s %s %u %s %s\n", , ,
    , , , ,

    but instead of writing the and , it writes the
    numeric owner and group IDs (this avoids /etc/passwd and /etc/group
    lookups as well as potential field splitting issues).

    The field is specified as "the value that would be returned for
    the file in the st_size field of struct stat".

    To avoid duplicating logic in several locations in the tree, create
    scripts/file-size.sh and update callers to use that instead of stat(1).

    [0] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html#tag_20_73_10

    Signed-off-by: Michael Forney
    Signed-off-by: Masahiro Yamada

    Michael Forney