81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
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// 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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* Tests basic error handling of the pread syscall.
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*
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* - ESPIPE when attempted to read from an unnamed pipe
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* - EINVAL if the specified offset position was invalid
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* - EISDIR when fd refers to a directory
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*/
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#include <fcntl.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#define PREAD_TEMPFILE "pread_file"
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#define PREAD_TEMPDIR "pread_dir"
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#define K1 1024
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static int pipe_fd[2], fd, dir_fd;
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struct test_case_t {
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int *fd;
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size_t nb;
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off_t offst;
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char *desc;
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int exp_errno;
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} tcases[] = {
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{&pipe_fd[0], K1, 0, "file descriptor is a PIPE or FIFO", ESPIPE},
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{&fd, K1, -1, "specified offset is negative", EINVAL},
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{&dir_fd, K1, 0, "file descriptor is a directory", EISDIR}
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};
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static void verify_pread(unsigned int n)
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{
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struct test_case_t *tc = &tcases[n];
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char buf[K1];
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TST_EXP_FAIL2(pread(*tc->fd, &buf, tc->nb, tc->offst), tc->exp_errno,
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"pread(%d, %zu, %lld) %s", *tc->fd, tc->nb, (long long)tc->offst, tc->desc);
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}
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static void setup(void)
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{
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SAFE_PIPE(pipe_fd);
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SAFE_WRITE(SAFE_WRITE_ALL, pipe_fd[1], "x", 1);
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fd = SAFE_OPEN(PREAD_TEMPFILE, O_RDWR | O_CREAT, 0666);
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SAFE_MKDIR(PREAD_TEMPDIR, 0777);
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dir_fd = SAFE_OPEN(PREAD_TEMPDIR, O_RDONLY);
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}
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static void cleanup(void)
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{
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int i;
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for (i = 0; i < 2; i++) {
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if (pipe_fd[i] > 0)
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SAFE_CLOSE(pipe_fd[i]);
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}
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if (fd > 0)
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SAFE_CLOSE(fd);
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if (dir_fd > 0)
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SAFE_CLOSE(dir_fd);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_pread,
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};
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