/*
* Copyright (c) 2024 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* compile: xcrun -sdk macosx.internal clang -ldarwintest -o open_symlink open_symlink.c -g -Weverything */
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/fsgetpath_private.h>
#include <darwintest.h>
#include <darwintest/utils.h>
static char template[MAXPATHLEN];
static char *testdir = NULL;
static char file[PATH_MAX], sym[PATH_MAX];
T_GLOBAL_META(
T_META_NAMESPACE("xnu.vfs"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("vfs"),
T_META_ASROOT(false),
T_META_CHECK_LEAKS(false));
static void
cleanup(void)
{
if (sym[0] != '\0') {
unlink(sym);
}
if (file[0] != '\0') {
unlink(file);
}
if (testdir) {
rmdir(testdir);
}
}
T_DECL(open_symlink,
"Verify that O_SYMLINK is not being ignored while used by open() in addition to O_CREAT")
{
int fd;
char namebuf[MAXPATHLEN + 1];
char namebuf2[MAXPATHLEN + 1];
file[0] = sym[0] = '\0';
T_ATEND(cleanup);
T_SETUPBEGIN;
/* Create test root dir */
snprintf(template, sizeof(template), "%s/open_symlink-XXXXXX", dt_tmpdir());
T_ASSERT_POSIX_NOTNULL((testdir = mkdtemp(template)), "Creating test root dir");
/* Setup file names */
snprintf(file, sizeof(file), "%s/%s", testdir, "file");
snprintf(sym, sizeof(sym), "%s/%s", testdir, "symlink");
/* Create the test file */
T_ASSERT_POSIX_SUCCESS((fd = open(file, O_CREAT | O_RDWR, 0777)), "Creating file %s", file);
/* Create the symlink */
T_ASSERT_POSIX_SUCCESS(symlink(file, sym), "Creating symlink %s -> %s", sym, file);
/* Close the test file */
T_ASSERT_POSIX_SUCCESS(close(fd), "Closing %s", file);
T_SETUPEND;
/* Step 1 - Verify O_SYMLINK behaviour */
T_ASSERT_POSIX_SUCCESS((fd = open(sym, O_SYMLINK, 0777)), "Opening %s using the O_SYMLINK flag", sym);
T_ASSERT_POSIX_SUCCESS(fcntl(fd, F_GETPATH, namebuf), "Calling fcntl() to get the path");
T_ASSERT_POSIX_SUCCESS(close(fd), "Closing %s", sym);
/* Step 2 - Verify O_SYMLINK | O_CREAT behaviour */
T_ASSERT_POSIX_SUCCESS((fd = open(sym, O_SYMLINK | O_CREAT, 0777)), "Opening %s using the O_SYMLINK | O_CREAT flags", sym);
T_ASSERT_POSIX_SUCCESS(fcntl(fd, F_GETPATH, namebuf2), "Calling fcntl() to get the path");
T_ASSERT_POSIX_SUCCESS(close(fd), "Closing %s", sym);
/* Compare names */
T_ASSERT_EQ(strncmp(namebuf, namebuf2, strlen(namebuf)), 0, "Verifying %s was opened, got %s", namebuf, namebuf2);
}