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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2002
* Ported from SPIE, section2/iosuite/dup3.c, by Airong Zhang
* Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
* Copyright (c) Linux Test Project, 2006-2024
*/
/*\
* [Description]
*
* Verify that the file descriptor created by dup(2) syscall has the same
* access mode as the old one.
*/
#include "tst_test.h"
static const char *testfile = "dup07";
static struct tcase {
char *mode_desc;
int mode;
} tcases[] = {
{"read only", 0444},
{"write only", 0222},
{"read/write", 0666},
};
static void run(unsigned int n)
{
int oldfd, dupfd;
struct stat oldbuf, dupbuf;
struct tcase *tc = &tcases[n];
oldfd = SAFE_CREAT(testfile, tc->mode);
dupfd = TST_EXP_FD_SILENT(dup(oldfd), "dup() %s file", tc->mode_desc);
if (TST_PASS) {
SAFE_FSTAT(oldfd, &oldbuf);
SAFE_FSTAT(dupfd, &dupbuf);
if (oldbuf.st_mode != dupbuf.st_mode)
tst_res(TFAIL, "%s and dup do not match", tc->mode_desc);
else
tst_res(TPASS, "Passed in %s mode", tc->mode_desc);
SAFE_CLOSE(dupfd);
}
SAFE_CLOSE(oldfd);
SAFE_UNLINK(testfile);
}
static struct tst_test test = {
.needs_tmpdir = 1,
.test = run,
.tcnt = ARRAY_SIZE(tcases),
};
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