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SUS says that expr must support "--" to prevent interpretation of

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negative numbers as options.
This commit is contained in:
joerg 2009-01-20 13:04:55 +00:00
parent 8ed9e9eb51
commit 14d25567b4
1 changed files with 15 additions and 9 deletions
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24
bin/expr/expr.y
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@ -1,4 +1,4 @@
/* $NetBSD: expr.y,v 1.34 2008/04/30 13:39:13 martin Exp $ */
/* $NetBSD: expr.y,v 1.35 2009/01/20 13:04:55 joerg Exp $ */
/*_
* Copyright (c) 2000 The NetBSD Foundation, Inc.
@ -32,7 +32,7 @@
%{
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: expr.y,v 1.34 2008/04/30 13:39:13 martin Exp $");
__RCSID("$NetBSD: expr.y,v 1.35 2009/01/20 13:04:55 joerg Exp $");
#endif /* not lint */
#include <sys/types.h>
@ -440,19 +440,25 @@ yyerror(const char *fmt, ...)
va_end(arg);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: %s expression\n", getprogname());
exit(2);
}
int
main(int argc, const char * const *argv)
{
setprogname(argv[0]);
(void)setlocale(LC_ALL, "");
if (argc == 1) {
(void)fprintf(stderr, "usage: %s expression\n",
getprogname());
exit(2);
}
av = argv + 1;
if (argc > 1 && strcmp(argv[1], "--"))
av = argv + 1;
else if (argc > 2)
av = argv + 2;
else
usage();
exit(yyparse());
/* NOTREACHED */