Messages in this thread | | | Date | Sun, 04 Nov 2001 20:47:53 -0000 | From | Alex Bligh - linux-kernel <> | Subject | Re: PROPOSAL: dot-proc interface [was: /proc stuff] |
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>> Using a ioctl that returns the type. > > But that's not pretty :) > > Can't we think of something else ?
Well this sure isn't perfect, but to illustrate it can be done with a text interface (and the only restriction is strings can't contain \n):
cat /proc/widget # Format: '%l' # Params: Number_of_Widgets 37
echo '38' > /proc/widget
cat /proc/widget # Format: '%l' # Params: Number_of_Widgets 38
cat /proc/widget | egrep -v '^#' 38
cat /proc/sprocket # Format: '%l' '%s' # Params: Number_of_Sprockets Master_Sprocket_Name 21 Foo Bar Baz
echo '22' > /proc/sprocket # writes first value if no \n character written before # close - all writes done simultaneously on close
cat /proc/sprocket | egrep -v '^#' 22 Foo Bar Baz
echo 'Master_Sprocket_Name\nBaz Foo Bar' > /proc/sprocket
cat /proc/sprocket | egrep -v '^#' 22 Baz Foo Bar
echo 'Master_Sprocket_Name\nFoo Foo Foo\nNumber_of_Sprockets\n111' > /proc/sprocket # Simultaneous commit if /proc driver needs it # i.e. it has get_lock() and release_lock() # entries cat /proc/sprocket | egrep -v '^#' 111 Foo Foo Foo
& nice user tools look at the '# Params:' line to find what number param they want to read / alter.
-- Alex Bligh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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