rc: usage: do not output non-printable short options in usage
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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@ -24,6 +24,7 @@
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*/
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#include "version.h"
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#include <ctype.h>
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#if lint
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# define _noreturn
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@ -59,6 +60,7 @@ usage(int exit_status)
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char *lo;
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char *p;
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char *token;
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char val[4] = "-?,";
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#ifdef usagestring
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printf(usagestring);
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@ -70,8 +72,9 @@ usage(int exit_status)
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#endif
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printf("\n\nOptions: [" getoptstring "]\n");
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for (i = 0; longopts[i].name; ++i) {
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len = printf(" -%c, --%s %s", longopts[i].val, longopts[i].name,
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has_arg[longopts[i].has_arg]);
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val[1] = longopts[i].val;
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len = printf(" %3s --%s %s", isprint(longopts[i].val) ? val : "",
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longopts[i].name, has_arg[longopts[i].has_arg]);
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lo = p = xstrdup(longopts_help[i]);
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while ((token = strsep(&p, "\n"))) {
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