From 025c439e829e0db9ac511cd9c1b8d5fd53475ead Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 15:14:46 +0200 Subject: Adding upstream version 1.9.15p5. Signed-off-by: Daniel Baumann --- lib/util/dup3.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 lib/util/dup3.c (limited to 'lib/util/dup3.c') diff --git a/lib/util/dup3.c b/lib/util/dup3.c new file mode 100644 index 0000000..c3ab141 --- /dev/null +++ b/lib/util/dup3.c @@ -0,0 +1,74 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2013 Todd C. Miller + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include + +#ifndef HAVE_DUP3 + +#include +#include +#include + +#include + +int +sudo_dup3(int oldd, int newd, int flags) +{ + int oflags; + + if (oldd == newd) { + errno = EINVAL; + return -1; + } + + if (dup2(oldd, newd) == -1) + return -1; + + oflags = fcntl(newd, F_GETFL, 0); + if (oflags == -1) + goto bad; + + if (ISSET(flags, O_NONBLOCK)) { + if (!ISSET(oflags, O_NONBLOCK)) { + SET(oflags, O_NONBLOCK); + if (fcntl(newd, F_SETFL, oflags) == -1) + goto bad; + } + } else { + if (ISSET(oflags, O_NONBLOCK)) { + CLR(oflags, O_NONBLOCK); + if (fcntl(newd, F_SETFL, oflags) == -1) + goto bad; + } + } + if (ISSET(flags, O_CLOEXEC)) { + if (fcntl(newd, F_SETFD, FD_CLOEXEC) == -1) + goto bad; + } + return 0; +bad: + close(newd); + return -1; +} + +#endif /* HAVE_DUP3 */ -- cgit v1.2.3