71 lines
1.3 KiB
C
71 lines
1.3 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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* Ported to LTP: Wayne Boyer
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* Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz>
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*/
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/*
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* Fork a process that creates a file and writes a few bytes, and
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* calls exit WITHOUT calling close(). The parent then reads the
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* file. If everything that was written is present in the file, then
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* the test passes.
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*/
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#include <stdlib.h>
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#include "tst_test.h"
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#define FNAME "test_file"
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static void child_write(void)
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{
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int fd;
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fd = SAFE_CREAT(FNAME, 0666);
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SAFE_WRITE(1, fd, FNAME, sizeof(FNAME));
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exit(0);
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}
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static void check_file(void)
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{
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int fd, len;
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char buf[256];
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fd = SAFE_OPEN(FNAME, O_RDONLY);
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len = SAFE_READ(0, fd, buf, sizeof(buf));
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if (len != sizeof(FNAME)) {
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tst_res(TFAIL, "Wrong length %i expected %zu", len, sizeof(buf));
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goto out;
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}
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if (memcmp(buf, FNAME, sizeof(FNAME))) {
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tst_res(TFAIL, "Wrong data read back");
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goto out;
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}
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tst_res(TPASS, "File written by child read back correctly");
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out:
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SAFE_CLOSE(fd);
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}
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static void run(void)
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{
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int pid;
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pid = SAFE_FORK();
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if (!pid)
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child_write();
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tst_reap_children();
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check_file();
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SAFE_UNLINK(FNAME);
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.forks_child = 1,
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.test_all = run,
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};
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