122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2019 by Tomohiro Kusumi. All rights reserved.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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/* backward compat in case it's not defined */
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#ifndef O_TMPFILE
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#define O_TMPFILE (020000000|O_DIRECTORY)
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#endif
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/*
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* DESCRIPTION:
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* Verify stat(2) for O_TMPFILE file considers umask.
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*
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* STRATEGY:
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* 1. open(2) with O_TMPFILE.
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* 2. linkat(2).
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* 3. fstat(2)/stat(2) and verify .st_mode value.
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*/
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static void
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test_stat_mode(mode_t mask)
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{
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struct stat st, fst;
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int i, fd;
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char spath[1024], dpath[1024];
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char *penv[] = {"TESTDIR", "TESTFILE0"};
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mode_t masked = 0777 & ~mask;
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mode_t mode;
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/*
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* Get the environment variable values.
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*/
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for (i = 0; i < sizeof (penv) / sizeof (char *); i++) {
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if ((penv[i] = getenv(penv[i])) == NULL) {
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fprintf(stderr, "getenv(penv[%d])\n", i);
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exit(1);
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}
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}
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umask(mask);
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fd = open(penv[0], O_RDWR|O_TMPFILE, 0777);
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if (fd == -1) {
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perror("open");
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exit(2);
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}
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if (fstat(fd, &fst) == -1) {
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perror("fstat");
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close(fd);
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exit(3);
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}
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snprintf(spath, sizeof (spath), "/proc/self/fd/%d", fd);
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snprintf(dpath, sizeof (dpath), "%s/%s", penv[0], penv[1]);
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unlink(dpath);
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if (linkat(AT_FDCWD, spath, AT_FDCWD, dpath, AT_SYMLINK_FOLLOW) == -1) {
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perror("linkat");
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close(fd);
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exit(4);
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}
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close(fd);
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if (stat(dpath, &st) == -1) {
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perror("stat");
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exit(5);
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}
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unlink(dpath);
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/* Verify fstat(2) result */
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mode = fst.st_mode & 0777;
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if (mode != masked) {
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fprintf(stderr, "fstat(2) %o != %o\n", mode, masked);
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exit(6);
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}
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/* Verify stat(2) result */
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mode = st.st_mode & 0777;
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if (mode != masked) {
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fprintf(stderr, "stat(2) %o != %o\n", mode, masked);
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exit(7);
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}
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}
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int
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main(int argc, char *argv[])
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{
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fprintf(stdout, "Verify stat(2) for O_TMPFILE file considers umask.\n");
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test_stat_mode(0022);
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test_stat_mode(0077);
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return (0);
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}
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