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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:21:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:21:29 +0000 |
commit | 29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc (patch) | |
tree | 63ef546b10a81d461e5cf5ed9e98a68cd7dee1aa /src/grep/gnulib-tests/test-openat-safer.c | |
parent | Initial commit. (diff) | |
download | kbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.tar.xz kbuild-29cd838eab01ed7110f3ccb2e8c6a35c8a31dbcc.zip |
Adding upstream version 1:0.1.9998svn3589+dfsg.upstream/1%0.1.9998svn3589+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/grep/gnulib-tests/test-openat-safer.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/grep/gnulib-tests/test-openat-safer.c b/src/grep/gnulib-tests/test-openat-safer.c new file mode 100644 index 0000000..92f641c --- /dev/null +++ b/src/grep/gnulib-tests/test-openat-safer.c @@ -0,0 +1,125 @@ +/* Test that openat_safer leave standard fds alone. + Copyright (C) 2009-2021 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written by Eric Blake <ebb9@byu.net>, 2009. */ + +#include <config.h> + +#include "fcntl--.h" + +#include <errno.h> +#include <stdio.h> +#include <sys/stat.h> +#include <unistd.h> + +/* This test intentionally closes stderr. So, we arrange to have fd 10 + (outside the range of interesting fd's during the test) set up to + duplicate the original stderr. */ + +#define BACKUP_STDERR_FILENO 10 +#define ASSERT_STREAM myerr +#include "macros.h" + +static FILE *myerr; + +#define witness "test-openat-safer.txt" + +int +main (void) +{ + int i; + int j; + int dfd; + int fd; + char buf[2]; + + /* We close fd 2 later, so save it in fd 10. */ + if (dup2 (STDERR_FILENO, BACKUP_STDERR_FILENO) != BACKUP_STDERR_FILENO + || (myerr = fdopen (BACKUP_STDERR_FILENO, "w")) == NULL) + return 2; + + /* Create handle for future use. */ + dfd = openat (AT_FDCWD, ".", O_RDONLY); + ASSERT (STDERR_FILENO < dfd); + + /* Create file for later checks. */ + remove (witness); + fd = openat (dfd, witness, O_WRONLY | O_CREAT | O_EXCL, 0600); + ASSERT (STDERR_FILENO < fd); + ASSERT (write (fd, "hi", 2) == 2); + ASSERT (close (fd) == 0); + + /* Four iterations, with progressively more standard descriptors + closed. */ + for (i = -1; i <= STDERR_FILENO; i++) + { + ASSERT (fchdir (dfd) == 0); + if (0 <= i) + ASSERT (close (i) == 0); + + /* Execute once in ".", once in "..". */ + for (j = 0; j <= 1; j++) + { + if (j) + ASSERT (chdir ("..") == 0); + + /* Check for error detection. */ + errno = 0; + ASSERT (openat (AT_FDCWD, "", O_RDONLY) == -1); + ASSERT (errno == ENOENT); + errno = 0; + ASSERT (openat (dfd, "", O_RDONLY) == -1); + ASSERT (errno == ENOENT); + errno = 0; + ASSERT (openat (-1, ".", O_RDONLY) == -1); + ASSERT (errno == EBADF); + + /* Check for trailing slash and /dev/null handling. */ + errno = 0; + ASSERT (openat (dfd, "nonexist.ent/", O_CREAT | O_RDONLY, + S_IRUSR | S_IWUSR) == -1); + ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT + || errno == EINVAL); + errno = 0; + ASSERT (openat (dfd, witness "/", O_RDONLY) == -1); + ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL); +#if defined __linux__ || defined __ANDROID__ + /* Using a bad directory is okay for absolute paths. */ + fd = openat (-1, "/dev/null", O_WRONLY); + ASSERT (STDERR_FILENO < fd); +#endif + /* Using a non-directory is wrong for relative paths. */ + errno = 0; + fd = open ("/dev/null", O_RDONLY); + ASSERT (STDERR_FILENO < fd); + ASSERT (openat (fd, ".", O_RDONLY) == -1); + ASSERT (errno == EBADF || errno == ENOTDIR); + ASSERT (close (fd) == 0); + + /* Check for our witness file. */ + fd = openat (dfd, witness, O_RDONLY | O_NOFOLLOW); + ASSERT (STDERR_FILENO < fd); + ASSERT (read (fd, buf, 2) == 2); + ASSERT (buf[0] == 'h' && buf[1] == 'i'); + ASSERT (close (fd) == 0); + } + } + ASSERT (fchdir (dfd) == 0); + ASSERT (unlink (witness) == 0); + ASSERT (close (dfd) == 0); + + return 0; +} |