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e5b431fc0c
The kernel should reject such exec()s now, early on. Instead of adding the needed boilerplate to write a test in C, just add an -n argument for "(n)ull argv" to the execve helper and exec this other helper that just exits silently with argv count. Reviewed by: emaste, kib, markj (all previous version) Differential Revision: https://reviews.freebsd.org/D34045
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
/* $NetBSD: doexec.c,v 1.8 2003/07/26 19:38:48 salo Exp $ */
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/*
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* Copyright (c) 1993 Christopher G. Demetriou
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* All rights reserved.
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*
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the
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* NetBSD Project. See http://www.NetBSD.org/ for
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* information about NetBSD.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* Passing -n == null_argv */
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static char * const null_argv[] = { NULL };
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int
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main(int argc, char **argv)
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{
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if (argc == 2) {
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execve(argv[1], &argv[1], NULL);
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} else if (argc == 3 && strcmp(argv[1], "-n") == 0) {
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execve(argv[2], null_argv, NULL);
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} else {
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fprintf(stderr, "usage: %s [-n] <progname>\n", argv[0]);
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exit(2);
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}
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err(1, "execve failed");
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}
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