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/* Test for chmod functions.
Copyright (C) 2000-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <dirent.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <mcheck.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#define OUT_OF_MEMORY \
do { \
puts ("cannot allocate memory"); \
result = 1; \
goto fail; \
} while (0)
static int
do_test (int argc, char *argv[])
{
const char *builddir;
struct stat64 st1;
struct stat64 st2;
char *buf;
char *testdir;
char *testfile = NULL;
char *startdir;
size_t buflen;
int fd;
int result = 0;
DIR *dir;
mtrace ();
if (argc <= 1)
error (EXIT_FAILURE, 0, "no parameters");
/* This is where we will create the test files. */
builddir = argv[1];
buflen = strlen (builddir) + 50;
startdir = getcwd (NULL, 0);
if (startdir == NULL)
{
printf ("cannot get current directory: %m\n");
exit (EXIT_FAILURE);
}
/* A buffer large enough for everything we need. */
buf = (char *) alloca (buflen);
/* Create the directory name. */
snprintf (buf, buflen, "%s/chmoddirXXXXXX", builddir);
if (mkdtemp (buf) == NULL)
{
printf ("cannot create test directory: %m\n");
exit (EXIT_FAILURE);
}
if (chmod ("", 0600) == 0)
{
puts ("chmod(\"\", 0600 didn't fail");
result = 1;
}
else if (errno != ENOENT)
{
puts ("chmod(\"\",0600) does not set errno to ENOENT");
result = 1;
}
/* Create a duplicate. */
testdir = strdup (buf);
if (testdir == NULL)
OUT_OF_MEMORY;
if (stat64 (testdir, &st1) != 0)
{
printf ("cannot stat test directory: %m\n");
exit (1);
}
if (!S_ISDIR (st1.st_mode))
{
printf ("file not created as directory: %m\n");
exit (1);
}
/* We have to wait for a second to make sure the ctime changes. */
sleep (1);
/* Remove all access rights from the directory. */
if (chmod (testdir, 0) != 0)
{
printf ("cannot change mode of test directory: %m\n");
result = 1;
goto fail;
}
if (stat64 (testdir, &st2) != 0)
{
printf ("cannot stat test directory: %m\n");
result = 1;
goto fail;
}
/* Compare result. */
if ((st2.st_mode & ALLPERMS) != 0)
{
printf ("chmod(...,0) on directory left bits nonzero: %o\n",
st2.st_mode & ALLPERMS);
result = 1;
}
if (st1.st_ctime >= st2.st_ctime)
{
puts ("chmod(...,0) did not set ctime correctly");
result = 1;
}
/* Name of a file in the directory. */
snprintf (buf, buflen, "%s/file", testdir);
testfile = strdup (buf);
if (testfile == NULL)
OUT_OF_MEMORY;
fd = creat (testfile, 0);
if (fd != -1)
{
if (getuid () != 0)
{
puts ("managed to create test file in protected directory");
result = 1;
}
close (fd);
}
else if (errno != EACCES)
{
puts ("creat didn't generate correct errno value");
result = 1;
}
/* With this mode it still shouldn't be possible to create a file. */
if (chmod (testdir, 0600) != 0)
{
printf ("cannot change mode of test directory to 0600: %m\n");
result = 1;
goto fail;
}
fd = creat (testfile, 0);
if (fd != -1)
{
if (getuid () != 0)
{
puts ("managed to create test file in no-x protected directory");
result = 1;
}
close (fd);
}
else if (errno != EACCES)
{
puts ("creat didn't generate correct errno value");
result = 1;
}
/* Change the directory mode back to allow creating a file. This
time with fchmod. */
dir = opendir (testdir);
if (dir != NULL)
{
if (fchmod (dirfd (dir), 0700) != 0)
{
printf ("cannot change mode of test directory to 0700: %m\n");
result = 1;
closedir (dir);
goto fail;
}
closedir (dir);
}
else
{
printf ("cannot open directory: %m\n");
result = 1;
if (chmod (testdir, 0700) != 0)
{
printf ("cannot change mode of test directory to 0700: %m\n");
goto fail;
}
}
fd = creat (testfile, 0);
if (fd == -1)
{
puts ("still didn't manage to create test file in protected directory");
result = 1;
goto fail;
}
if (fstat64 (fd, &st1) != 0)
{
printf ("cannot stat new file: %m\n");
result = 1;
}
else if ((st1.st_mode & ALLPERMS) != 0)
{
puts ("file not created with access mode 0");
result = 1;
}
close (fd);
snprintf (buf, buflen, "%s/..", testdir);
chdir (buf);
/* We are now in the directory above the one we create the test
directory in. */
sleep (1);
snprintf (buf, buflen, "./%s/../%s/file",
basename (testdir), basename (testdir));
if (chmod (buf, 0600) != 0)
{
printf ("cannot change mode of file to 0600: %m\n");
result = 1;
goto fail;
}
snprintf (buf, buflen, "./%s//file", basename (testdir));
if (stat64 (buf, &st2) != 0)
{
printf ("cannot stat new file: %m\n");
result = 1;
}
else if ((st2.st_mode & ALLPERMS) != 0600)
{
puts ("file mode not changed to 0600");
result = 1;
}
else if (st1.st_ctime >= st2.st_ctime)
{
puts ("chmod(\".../file\",0600) did not set ctime correctly");
result = 1;
}
if (chmod (buf, 0777 | S_ISUID | S_ISGID) != 0)
{
printf ("cannot change mode of file to %o: %m\n",
0777 | S_ISUID | S_ISGID);
result = 1;
}
if (stat64 (buf, &st2) != 0)
{
printf ("cannot stat test file: %m\n");
result = 1;
}
else if ((st2.st_mode & ALLPERMS) != (0777 | S_ISUID | S_ISGID))
{
puts ("file mode not changed to 0777 | S_ISUID | S_ISGID");
result = 1;
}
if (chmod (basename (testdir), 0777 | S_ISUID | S_ISGID | S_ISVTX) != 0)
{
printf ("cannot change mode of test directory to %o: %m\n",
0777 | S_ISUID | S_ISGID | S_ISVTX);
result = 1;
}
if (stat64 (basename (testdir), &st2) != 0)
{
printf ("cannot stat test directory: %m\n");
result = 1;
}
else if ((st2.st_mode & ALLPERMS) != (0777 | S_ISUID | S_ISGID | S_ISVTX))
{
puts ("directory mode not changed to 0777 | S_ISUID | S_ISGID | S_ISGID");
result = 1;
}
snprintf (buf, buflen, "./%s/no-such-file", basename (testdir));
if (chmod (buf, 0600) != -1)
{
puts ("chmod(\".../no-such-file\",0600) did not fail");
result = 1;
}
else if (errno != ENOENT)
{
puts ("chmod(\".../no-such-file\",0600) does not set errno to ENOENT");
result = 1;
}
snprintf (buf, buflen, "%s/", basename (testdir));
if (chmod (basename (testdir), 0677) != 0)
{
printf ("cannot change mode of test directory to 0677: %m\n");
result = 1;
}
else
{
snprintf (buf, buflen, "./%s/file", basename (testdir));
if (chmod (buf, 0600) == 0)
{
if (getuid () != 0)
{
puts ("chmod(\".../file\") with no-exec directory succeeded");
result = 1;
}
}
else if (errno != EACCES)
{
puts ("chmod(\".../file\") with no-exec directory didn't set EACCES");
result = 1;
}
}
if (chmod (basename (testdir), 0777) != 0)
{
printf ("cannot change mode of test directory to 0777: %m\n");
result = 1;
goto fail;
}
snprintf (buf, buflen, "%s/file/cannot-be", basename (testdir));
if (chmod (buf, 0600) == 0)
{
puts ("chmod(\".../file/cannot-be\",0600) did not fail");
result = 1;
}
else if (errno != ENOTDIR)
{
puts ("chmod(\".../file/cannot-be\",0600) does not set errno to ENOTDIR");
result = 1;
}
fail:
chdir (startdir);
/* Remove all the files. */
chmod (testdir, 0700);
if (testfile != NULL)
{
chmod (testfile, 0700);
unlink (testfile);
}
rmdir (testdir);
/* Free the resources. */
free (testfile);
free (testdir);
free (startdir);
return result;
}
/* We need a few seconds since we have a few sleeps in the code. */
#define TIMEOUT 20
#include "../test-skeleton.c"
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