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📁 ..
📄 Makefile(1.76 KB)
📄 Makefile.depend(312 B)
📄 TOUR(14.11 KB)
📄 alias.c(5.35 KB)
📄 alias.h(1.83 KB)
📄 arith.h(1.72 KB)
📄 arith_yacc.c(8.38 KB)
📄 arith_yacc.h(2.86 KB)
📄 arith_yylex.c(5.5 KB)
📁 bltin
📄 builtins.def(3.09 KB)
📄 cd.c(8.94 KB)
📄 cd.h(1.59 KB)
📄 dot.profile(507 B)
📄 dot.shrc(865 B)
📄 error.c(5.08 KB)
📄 error.h(3.69 KB)
📄 eval.c(30.24 KB)
📄 eval.h(2.84 KB)
📄 exec.c(17.56 KB)
📄 exec.h(2.8 KB)
📄 expand.c(33.14 KB)
📄 expand.h(2.47 KB)
📁 funcs
📄 histedit.c(10.93 KB)
📄 input.c(11.52 KB)
📄 input.h(2.59 KB)
📄 jobs.c(32.46 KB)
📄 jobs.h(2.55 KB)
📄 mail.c(3.36 KB)
📄 mail.h(1.76 KB)
📄 main.c(7.29 KB)
📄 main.h(1.95 KB)
📄 memalloc.c(7.68 KB)
📄 memalloc.h(3.33 KB)
📄 miscbltin.c(12.62 KB)
📄 mkbuiltins(3.38 KB)
📄 mknodes.c(11.14 KB)
📄 mksyntax.c(8.83 KB)
📄 mktokens(2.79 KB)
📄 myhistedit.h(1.82 KB)
📄 mystring.c(2.74 KB)
📄 mystring.h(1.86 KB)
📄 nodes.c.pat(4.35 KB)
📄 nodetypes(5.1 KB)
📄 options.c(12.97 KB)
📄 options.h(3.63 KB)
📄 output.c(7.24 KB)
📄 output.h(3.24 KB)
📄 parser.c(46.37 KB)
📄 parser.h(3.43 KB)
📄 profile(427 B)
📄 redir.c(8.71 KB)
📄 redir.h(2.02 KB)
📄 sh.1(72.73 KB)
📄 shell.h(2.61 KB)
📄 show.c(8.08 KB)
📄 show.h(1.84 KB)
📁 tests
📄 trap.c(11.32 KB)
📄 trap.h(2.09 KB)
📄 var.c(19.03 KB)
📄 var.h(4.4 KB)

Editing: mystring.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)mystring.c	8.2 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

/*
 * String functions.
 *
 *	equal(s1, s2)		Return true if strings are equal.
 *	number(s)		Convert a string of digits to an integer.
 *	is_number(s)		Return true if s is a string of digits.
 */

#include <stdlib.h>
#include "shell.h"
#include "syntax.h"
#include "error.h"
#include "mystring.h"

char nullstr[1];		/* zero length string */

/*
 * equal - #defined in mystring.h
 */

/*
 * Convert a string of digits to an integer, printing an error message on
 * failure.
 */

int
number(const char *s)
{
	if (! is_number(s))
		error("Illegal number: %s", s);
	return atoi(s);
}

/*
 * Check for a valid number.  This should be elsewhere.
 */

int
is_number(const char *p)
{
	const char *q;

if (*p == '\0')
		return 0;
	while (*p == '0')
		p++;
	for (q = p; *q != '\0'; q++)
		if (! is_digit(*q))
			return 0;
	if (q - p > 10 ||
	    (q - p == 10 && memcmp(p, "2147483647", 10) > 0))
		return 0;
	return 1;
}

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Editing: mystring.c

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