109 lines
2.2 KiB
C
109 lines
2.2 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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*/
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/*\
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* [Description]
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*
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* Test basic error handling of the pwrite syscall.
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*
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* - ESPIPE when attempted to write to an unnamed pipe
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* - EINVAL the specified offset position was invalid
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* - EBADF fd is not a valid file descriptor
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* - EBADF fd is not open for writing
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* - EFAULT when attempted to write with buf outside accessible address space
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include "tst_test.h"
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#define TEMPFILE "pwrite_file"
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#define BS 1024
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static int fd;
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static int fd_ro;
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static int inv_fd = -1;
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static int pipe_fds[2];
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static char buf[BS];
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static struct tcase {
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void *buf;
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size_t size;
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int *fd;
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off_t off;
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int exp_errno;
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} tcases[] = {
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{buf, sizeof(buf), &pipe_fds[1], 0, ESPIPE},
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{buf, sizeof(buf), &fd, -1, EINVAL},
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{buf, sizeof(buf), &inv_fd, 0, EBADF},
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{buf, sizeof(buf), &fd_ro, 0, EBADF},
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{NULL, sizeof(buf), &fd, 0, EFAULT},
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};
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/*
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* sighandler - handle SIGXFSZ
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*
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* This is here to start looking at a failure in test case #2. This
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* test case passes on a machine running RedHat 6.2 but it will fail
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* on a machine running RedHat 7.1.
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*/
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static void sighandler(int sig)
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{
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int ret;
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if (sig != SIGXFSZ) {
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ret = write(STDOUT_FILENO, "get wrong signal\n",
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sizeof("get wrong signal\n"));
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} else {
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ret = write(STDOUT_FILENO, "caught SIGXFSZ\n",
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sizeof("caught SIGXFSZ\n"));
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}
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(void)ret;
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}
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static void verify_pwrite(unsigned int i)
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{
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struct tcase *tc = &tcases[i];
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TST_EXP_FAIL2(pwrite(*tc->fd, tc->buf, BS, tc->off), tc->exp_errno,
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"pwrite(%d, %d, %ld)", *tc->fd, BS, tc->off);
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}
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static void setup(void)
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{
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SAFE_SIGNAL(SIGXFSZ, sighandler);
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SAFE_PIPE(pipe_fds);
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fd = SAFE_OPEN(TEMPFILE, O_RDWR | O_CREAT, 0666);
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fd_ro = SAFE_OPEN(TEMPFILE, O_RDONLY | O_CREAT, 0666);
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}
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static void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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if (fd_ro > 0)
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SAFE_CLOSE(fd_ro);
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if (pipe_fds[0] > 0)
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SAFE_CLOSE(pipe_fds[0]);
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if (pipe_fds[1] > 0)
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SAFE_CLOSE(pipe_fds[1]);
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}
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static struct tst_test test = {
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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_pwrite,
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.tcnt = ARRAY_SIZE(tcases),
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};
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