tools: iio: iio_generic_buffer: fix argument '?' option
When help ('?') option is passed to the command, the help text printed but not from '?' switch case of getopt_long() but as a invalid argument as below. Fix this by adding '?' to opt_String of getopt_long(). root@am437x-evm:~# ./iio_generic_buffer -? ./iio_generic_buffer: invalid option -- '?' Usage: generic_buffer [options]... Capture, convert and output data from IIO device buffer -a Auto-activate all available channels ... Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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@ -352,7 +352,7 @@ int main(int argc, char **argv)
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register_cleanup();
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while ((c = getopt_long(argc, argv, "ac:egl:n:N:t:T:w:", longopts, NULL)) != -1) {
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while ((c = getopt_long(argc, argv, "ac:egl:n:N:t:T:w:?", longopts, NULL)) != -1) {
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switch (c) {
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case 'a':
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autochannels = AUTOCHANNELS_ENABLED;
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