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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
372 lines
8.6 KiB
C
372 lines
8.6 KiB
C
/* Test for chmod functions.
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Copyright (C) 2000-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <dirent.h>
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <mcheck.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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#include <sys/stat.h>
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#define OUT_OF_MEMORY \
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do { \
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puts ("cannot allocate memory"); \
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result = 1; \
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goto fail; \
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} while (0)
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static int
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do_test (int argc, char *argv[])
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{
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const char *builddir;
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struct stat64 st1;
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struct stat64 st2;
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char *buf;
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char *testdir;
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char *testfile = NULL;
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char *startdir;
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size_t buflen;
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int fd;
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int result = 0;
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DIR *dir;
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mtrace ();
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if (argc <= 1)
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error (EXIT_FAILURE, 0, "no parameters");
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/* This is where we will create the test files. */
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builddir = argv[1];
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buflen = strlen (builddir) + 50;
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startdir = getcwd (NULL, 0);
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if (startdir == NULL)
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{
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printf ("cannot get current directory: %m\n");
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exit (EXIT_FAILURE);
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}
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/* A buffer large enough for everything we need. */
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buf = (char *) alloca (buflen);
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/* Create the directory name. */
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snprintf (buf, buflen, "%s/chmoddirXXXXXX", builddir);
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if (mkdtemp (buf) == NULL)
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{
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printf ("cannot create test directory: %m\n");
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exit (EXIT_FAILURE);
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}
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if (chmod ("", 0600) == 0)
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{
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puts ("chmod(\"\", 0600 didn't fail");
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result = 1;
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}
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else if (errno != ENOENT)
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{
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puts ("chmod(\"\",0600) does not set errno to ENOENT");
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result = 1;
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}
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/* Create a duplicate. */
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testdir = strdup (buf);
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if (testdir == NULL)
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OUT_OF_MEMORY;
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if (stat64 (testdir, &st1) != 0)
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{
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printf ("cannot stat test directory: %m\n");
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exit (1);
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}
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if (!S_ISDIR (st1.st_mode))
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{
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printf ("file not created as directory: %m\n");
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exit (1);
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}
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/* We have to wait for a second to make sure the ctime changes. */
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sleep (1);
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/* Remove all access rights from the directory. */
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if (chmod (testdir, 0) != 0)
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{
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printf ("cannot change mode of test directory: %m\n");
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result = 1;
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goto fail;
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}
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if (stat64 (testdir, &st2) != 0)
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{
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printf ("cannot stat test directory: %m\n");
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result = 1;
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goto fail;
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}
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/* Compare result. */
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if ((st2.st_mode & ALLPERMS) != 0)
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{
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printf ("chmod(...,0) on directory left bits nonzero: %o\n",
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st2.st_mode & ALLPERMS);
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result = 1;
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}
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if (st1.st_ctime >= st2.st_ctime)
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{
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puts ("chmod(...,0) did not set ctime correctly");
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result = 1;
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}
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/* Name of a file in the directory. */
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snprintf (buf, buflen, "%s/file", testdir);
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testfile = strdup (buf);
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if (testfile == NULL)
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OUT_OF_MEMORY;
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fd = creat (testfile, 0);
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if (fd != -1)
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{
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if (getuid () != 0)
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{
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puts ("managed to create test file in protected directory");
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result = 1;
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}
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close (fd);
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}
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else if (errno != EACCES)
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{
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puts ("creat didn't generate correct errno value");
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result = 1;
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}
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/* With this mode it still shouldn't be possible to create a file. */
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if (chmod (testdir, 0600) != 0)
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{
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printf ("cannot change mode of test directory to 0600: %m\n");
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result = 1;
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goto fail;
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}
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fd = creat (testfile, 0);
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if (fd != -1)
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{
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if (getuid () != 0)
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{
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puts ("managed to create test file in no-x protected directory");
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result = 1;
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}
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close (fd);
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}
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else if (errno != EACCES)
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{
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puts ("creat didn't generate correct errno value");
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result = 1;
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}
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/* Change the directory mode back to allow creating a file. This
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time with fchmod. */
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dir = opendir (testdir);
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if (dir != NULL)
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{
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if (fchmod (dirfd (dir), 0700) != 0)
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{
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printf ("cannot change mode of test directory to 0700: %m\n");
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result = 1;
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closedir (dir);
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goto fail;
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}
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closedir (dir);
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}
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else
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{
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printf ("cannot open directory: %m\n");
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result = 1;
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if (chmod (testdir, 0700) != 0)
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{
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printf ("cannot change mode of test directory to 0700: %m\n");
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goto fail;
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}
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}
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fd = creat (testfile, 0);
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if (fd == -1)
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{
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puts ("still didn't manage to create test file in protected directory");
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result = 1;
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goto fail;
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}
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if (fstat64 (fd, &st1) != 0)
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{
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printf ("cannot stat new file: %m\n");
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result = 1;
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}
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else if ((st1.st_mode & ALLPERMS) != 0)
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{
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puts ("file not created with access mode 0");
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result = 1;
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}
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close (fd);
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snprintf (buf, buflen, "%s/..", testdir);
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chdir (buf);
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/* We are now in the directory above the one we create the test
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directory in. */
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sleep (1);
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snprintf (buf, buflen, "./%s/../%s/file",
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basename (testdir), basename (testdir));
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if (chmod (buf, 0600) != 0)
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{
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printf ("cannot change mode of file to 0600: %m\n");
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result = 1;
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goto fail;
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}
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snprintf (buf, buflen, "./%s//file", basename (testdir));
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if (stat64 (buf, &st2) != 0)
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{
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printf ("cannot stat new file: %m\n");
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result = 1;
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}
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else if ((st2.st_mode & ALLPERMS) != 0600)
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{
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puts ("file mode not changed to 0600");
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result = 1;
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}
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else if (st1.st_ctime >= st2.st_ctime)
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{
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puts ("chmod(\".../file\",0600) did not set ctime correctly");
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result = 1;
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}
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if (chmod (buf, 0777 | S_ISUID | S_ISGID) != 0)
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{
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printf ("cannot change mode of file to %o: %m\n",
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0777 | S_ISUID | S_ISGID);
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result = 1;
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}
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if (stat64 (buf, &st2) != 0)
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{
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printf ("cannot stat test file: %m\n");
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result = 1;
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}
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else if ((st2.st_mode & ALLPERMS) != (0777 | S_ISUID | S_ISGID))
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{
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puts ("file mode not changed to 0777 | S_ISUID | S_ISGID");
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result = 1;
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}
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if (chmod (basename (testdir), 0777 | S_ISUID | S_ISGID | S_ISVTX) != 0)
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{
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printf ("cannot change mode of test directory to %o: %m\n",
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0777 | S_ISUID | S_ISGID | S_ISVTX);
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result = 1;
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}
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if (stat64 (basename (testdir), &st2) != 0)
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{
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printf ("cannot stat test directory: %m\n");
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result = 1;
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}
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else if ((st2.st_mode & ALLPERMS) != (0777 | S_ISUID | S_ISGID | S_ISVTX))
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{
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puts ("directory mode not changed to 0777 | S_ISUID | S_ISGID | S_ISGID");
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result = 1;
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}
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snprintf (buf, buflen, "./%s/no-such-file", basename (testdir));
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if (chmod (buf, 0600) != -1)
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{
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puts ("chmod(\".../no-such-file\",0600) did not fail");
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result = 1;
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}
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else if (errno != ENOENT)
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{
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puts ("chmod(\".../no-such-file\",0600) does not set errno to ENOENT");
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result = 1;
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}
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snprintf (buf, buflen, "%s/", basename (testdir));
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if (chmod (basename (testdir), 0677) != 0)
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{
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printf ("cannot change mode of test directory to 0677: %m\n");
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result = 1;
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}
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else
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{
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snprintf (buf, buflen, "./%s/file", basename (testdir));
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if (chmod (buf, 0600) == 0)
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{
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if (getuid () != 0)
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{
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puts ("chmod(\".../file\") with no-exec directory succeeded");
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result = 1;
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}
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}
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else if (errno != EACCES)
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{
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puts ("chmod(\".../file\") with no-exec directory didn't set EACCES");
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result = 1;
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}
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}
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if (chmod (basename (testdir), 0777) != 0)
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{
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printf ("cannot change mode of test directory to 0777: %m\n");
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result = 1;
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goto fail;
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}
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snprintf (buf, buflen, "%s/file/cannot-be", basename (testdir));
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if (chmod (buf, 0600) == 0)
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{
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puts ("chmod(\".../file/cannot-be\",0600) did not fail");
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result = 1;
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}
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else if (errno != ENOTDIR)
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{
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puts ("chmod(\".../file/cannot-be\",0600) does not set errno to ENOTDIR");
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result = 1;
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}
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fail:
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chdir (startdir);
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/* Remove all the files. */
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chmod (testdir, 0700);
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if (testfile != NULL)
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{
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chmod (testfile, 0700);
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unlink (testfile);
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}
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rmdir (testdir);
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/* Free the resources. */
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free (testfile);
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free (testdir);
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free (startdir);
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return result;
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}
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#include "../test-skeleton.c"
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