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lib/util/dup3.c
69 строк
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Todd C. Miller
Remove Open Source PVS-Studio comments
28 сен 2025, 18:40
28 сен 2025, 18:40
2a33699
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/* * SPDX-License-Identifier: ISC * * Copyright (c) 2013 Todd C. Miller <Todd.Miller@sudo.ws> * * 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. */ #include <config.h> #ifndef HAVE_DUP3 #include <errno.h> #include <fcntl.h> #include <unistd.h> #include <sudo_compat.h> 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 */