120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* 07/2001 Ported by Wayne Boyer
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*/
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/*\
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* [Description]
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*
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* Test whether the access mode are the same for both file descriptors.
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*
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* Create file with mode, dup2, [change mode], check mode
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*
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* - read only, dup2, read only ? "0444"
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* - write only, dup2, write only ? "0222"
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* - read/write, dup2 read/write ? "0666"
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* - read/write/execute, dup2, set read only, read only ? "0444"
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* - read/write/execute, dup2, set write only, write only ? "0222"
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* - read/write/execute, dup2, set read/write, read/write ? "0666"
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "tst_test.h"
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#include "tst_safe_macros.h"
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static char testfile[40];
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static int ofd = -1, nfd = -1;
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/* set these to a known index into our local file descriptor table */
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static int duprdo, dupwro, duprdwr;
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static struct tcase {
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int *nfd;
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mode_t mode;
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/* 0 - set mode before dup2, 1 - change mode after dup2 */
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int flag;
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} tcases[] = {
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{&duprdo, 0444, 0},
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{&dupwro, 0222, 0},
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{&duprdwr, 0666, 0},
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{&duprdo, 0444, 1},
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{&dupwro, 0222, 1},
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{&duprdwr, 0666, 1},
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};
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static void setup(void)
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{
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int nextfd;
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umask(0);
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sprintf(testfile, "dup202.%d", getpid());
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/* Pick up fds that are known not to collide with creat */
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nextfd = SAFE_CREAT(testfile, 0777);
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duprdo = SAFE_DUP(nextfd);
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dupwro = SAFE_DUP(nextfd);
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duprdwr = SAFE_DUP(nextfd);
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/* SAFE_CLOSE will set fd to -1 */
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close(duprdwr);
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close(dupwro);
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close(duprdo);
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SAFE_CLOSE(nextfd);
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SAFE_UNLINK(testfile);
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}
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static void cleanup(void)
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{
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close(ofd);
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close(nfd);
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}
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static void run(unsigned int i)
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{
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struct stat oldbuf, newbuf;
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struct tcase *tc = tcases + i;
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if (tc->flag)
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ofd = SAFE_CREAT(testfile, 0777);
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else
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ofd = SAFE_CREAT(testfile, tc->mode);
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nfd = *tc->nfd;
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TEST(dup2(ofd, nfd));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "call failed unexpectedly");
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goto free;
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}
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if (tc->flag) {
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SAFE_CHMOD(testfile, tc->mode);
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tst_res(TINFO, "original mode 0777, new mode 0%o after chmod", tc->mode);
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}
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SAFE_FSTAT(ofd, &oldbuf);
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SAFE_FSTAT(nfd, &newbuf);
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if (oldbuf.st_mode != newbuf.st_mode)
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tst_res(TFAIL, "original(%o) and duped(%o) are not same mode",
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oldbuf.st_mode, newbuf.st_mode);
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else
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tst_res(TPASS, "original(%o) and duped(%o) are the same mode",
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oldbuf.st_mode, newbuf.st_mode);
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SAFE_CLOSE(nfd);
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free:
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SAFE_CLOSE(ofd);
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SAFE_UNLINK(testfile);
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.tcnt = ARRAY_SIZE(tcases),
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.test = run,
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.setup = setup,
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.cleanup = cleanup,
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};
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