69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
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* Copyright 2007-2008 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if lint
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# define _noreturn
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#endif
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#if __GNUC__ > 2 || defined(__INTEL_COMPILER)
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# define _noreturn __attribute__ ((__noreturn__))
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#else
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# define _noreturn
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#endif
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_noreturn static void usage(int exit_status)
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{
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const char * const has_arg[] = { "", "<arg>", "[arg]" };
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int i;
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int len;
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char *lo;
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char *p;
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char *token;
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#ifdef usagestring
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printf(usagestring);
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#else
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printf("Usage: %s [options] ", applet);
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#endif
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#ifdef extraopts
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printf(extraopts);
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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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lo = p = xstrdup(longopts_help[i]);
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while ((token = strsep(&p, "\n"))) {
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while (++len < 37)
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printf(" ");
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puts(token);
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len = 0;
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}
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free(lo);
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}
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exit(exit_status);
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}
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