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void usage(poptContext optCon, int exitcode, char *error, char *addl) {
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poptPrintUsage(optCon, stderr, 0);
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if (error) fprintf(stderr, "%s: %s\n", error, addl);
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if (error) fprintf(stderr, "%s: %s\\n", error, addl);
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int main(int argc, char *argv[]) {
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int i = 0; /* used for tracking options */
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int speed = 0; /* used in argument parsing to set speed */
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int raw = 0; /* raw mode? */
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poptContext optCon; /* context for parsing command-line options */
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struct poptOption optionsTable[] = {