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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:37:38 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:37:38 +0000 |
commit | ae581a19fbe896a797450b9d9573fb66f2735227 (patch) | |
tree | 56c40be8518a29c9351364d13a9676aa83932dc0 /lib/util/openat.c | |
parent | Initial commit. (diff) | |
download | sudo-ae581a19fbe896a797450b9d9573fb66f2735227.tar.xz sudo-ae581a19fbe896a797450b9d9573fb66f2735227.zip |
Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/util/openat.c')
-rw-r--r-- | lib/util/openat.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/util/openat.c b/lib/util/openat.c new file mode 100644 index 0000000..5431525 --- /dev/null +++ b/lib/util/openat.c @@ -0,0 +1,63 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2015, 2019-2020 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. + */ + +/* + * 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 <config.h> + +#include <fcntl.h> +#include <unistd.h> + +#include "sudo_compat.h" + +#ifndef HAVE_OPENAT +int +sudo_openat(int dfd, const char *path, int flags, mode_t mode) +{ + int fd, odfd; + + if (dfd == AT_FDCWD) + return open(path, flags, mode); + + /* Save cwd */ + if ((odfd = open(".", O_RDONLY)) == -1) + return -1; + + if (fchdir(dfd) == -1) { + close(odfd); + return -1; + } + + fd = open(path, flags, mode); + + /* Restore cwd */ + if (fchdir(odfd) == -1) { + /* Should not happen */ + if (fd != -1) { + close(fd); + fd = -1; + } + } + close(odfd); + + return fd; +} +#endif /* HAVE_OPENAT */ |