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    SubjectRe: 2.6.2: "-" or "_", thats the question
    On Mon, 16 Feb 2004, Ryan Reich wrote:

    > On Mon, 16 Feb 2004, Harald Dunkel wrote:
    >
    > > Ryan Reich wrote:
    > > > Harald Dunkel wrote:
    > > >
    > > >>
    > > >> I am interested in the module file names. 'cat /proc/modules'
    > > >> should return the correct module names, but for some modules
    > > >> (like uhci_hcd vs uhci-hcd.ko) '_' and '-' are messed up.
    > > >
    > > >
    > > > According to the modprobe man page, the two symbols are interchangeable.
    > > >
    > > I know. But this requires some very ugly workarounds outside
    > > of module-init-tools. For example, if you want to check
    > > whether a module $module_name has already been loaded, you
    > > cannot use
    > >
    > > grep -q "^${module_name} " /proc/modules
    > >
    > > Instead you have to use a workaround like
    > >
    > > x="`echo $module_name | sed -e 's/-/_/g'`"
    > > cat /proc/modules | sed -e 's/-/_/g' | grep -q "^${x} "
    > >
    > > This is inefficient and error-prone.
    > >
    > > Maybe somebody has another idea for the workaround,
    > > but I like the first version.
    >
    > Well, you can shorten it by using 'tr':
    >
    > cat /proc/modules | tr _ - | grep -q "^${module_name} "
    >
    > /proc/modules uses the '_' and I suppose your problem is that your module name
    > list uses the '-', so this solves both at once.

    Sorry, I didn't realize that your problem was also the inconsistency in module
    names. Someone else suggested using a shell expansion; you could try

    cat /proc/modules | tr _ - | grep -q "^${module_name/_/-}"

    which is both short and works.

    --
    Ryan Reich
    ryanr@uchicago.edu
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