Add a test for the latest fifofs fix.
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christos
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# $NetBSD: Makefile,v 1.21 2011/03/10 20:02:26 pooka Exp $
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# $NetBSD: Makefile,v 1.22 2011/12/21 00:17:06 christos Exp $
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.include <bsd.own.mk>
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@ -6,7 +6,7 @@ TESTSDIR= ${TESTSBASE}/fs
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SUBDIR+= common .WAIT
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TESTS_SUBDIRS+= ffs hfs kernfs lfs msdosfs nfs nullfs psshfs ptyfs puffs
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TESTS_SUBDIRS+= ffs fifofs hfs kernfs lfs msdosfs nfs nullfs psshfs ptyfs puffs
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TESTS_SUBDIRS+= tmpfs umapfs union
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TESTS_SUBDIRS+= vfs
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9
tests/fs/fifofs/Makefile
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9
tests/fs/fifofs/Makefile
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# $NetBSD: Makefile,v 1.1 2011/12/21 00:17:07 christos Exp $
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#
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TESTSDIR= ${TESTSBASE}/fs/fifo
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WARNS= 4
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TESTS_C= t_fifo
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.include <bsd.test.mk>
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237
tests/fs/fifofs/t_fifo.c
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237
tests/fs/fifofs/t_fifo.c
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/* Test case written by Bharat Joshi */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_fifo.c,v 1.1 2011/12/21 00:17:07 christos Exp $");
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <err.h>
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#include <signal.h>
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#ifndef STANDALONE
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#include <atf-c.h>
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#endif
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#define FIFO_FILE_PATH "./fifo_file"
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#define NUM_MESSAGES 20
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#define MSG_SIZE 240
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#define MESSAGE "I am fine"
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static int verbose = 0;
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/*
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* child_writer
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*
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* Function that runs in child context and opens and write to the FIFO.
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*/
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static void
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child_writer(void)
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{
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ssize_t rv;
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int fd;
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size_t count;
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char message[MSG_SIZE] = MESSAGE;
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static const struct timespec ts = { 0, 10000 };
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/* Open the fifo in write-mode */
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for (;;) {
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fd = open(FIFO_FILE_PATH, O_WRONLY, 0);
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if (fd == -1) {
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if (errno == EINTR)
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continue;
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err(1, "Child: can't open fifo in write mode");
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}
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break;
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}
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for (count = 0; count < NUM_MESSAGES; count++) {
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rv = write(fd, message, MSG_SIZE);
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if (rv == -1) {
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warn("Child: Failed to write");
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break;
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}
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if (rv != MSG_SIZE)
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warnx("Child: wrote only %zd", rv);
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nanosleep(&ts, NULL);
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}
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close(fd);
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if (verbose) {
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printf("Child: Closed the fifo file\n");
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fflush(stdout);
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}
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}
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/*
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* _sigchild_handler
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*
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* Called when a sigchild is delivered
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*/
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static void
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sigchild_handler(int signo)
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{
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if (verbose) {
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if (signo == SIGCHLD) {
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printf("Got sigchild\n");
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} else {
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printf("Got %d signal\n", signo);
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}
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fflush(stdout);
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}
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}
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static int
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run(void)
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{
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pid_t pid;
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ssize_t rv;
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int fd, status;
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size_t buf_size = MSG_SIZE;
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char buf[MSG_SIZE];
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struct sigaction action;
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static const struct timespec ts = { 0, 500000000 };
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/* Catch sigchild Signal */
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memset(&action, 0, sizeof(action));
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action.sa_handler = sigchild_handler;
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sigemptyset(&action.sa_mask);
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if (sigaction(SIGCHLD, &action, NULL) == -1)
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err(1, "sigaction");
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(void)unlink(FIFO_FILE_PATH);
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/* First create a fifo */
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if (mkfifo(FIFO_FILE_PATH, S_IRUSR | S_IWUSR) == -1)
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err(1, "mkfifo");
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switch ((pid = fork())) {
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case -1:
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err(1, "fork");
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case 0:
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/* Open the file in write mode so that subsequent read
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* from parent side does not block the parent..
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*/
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if ((fd = open(FIFO_FILE_PATH, O_WRONLY, 0)) == -1)
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err(1, "failed to open fifo");
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/* In child */
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child_writer();
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return 0;
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default:
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break;
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}
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if (verbose) {
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printf("Child pid is %d\n", pid );
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fflush(stdout);
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}
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/* In parent */
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for (;;) {
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if ((fd = open(FIFO_FILE_PATH, O_RDONLY, 0)) == -1) {
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if (errno == EINTR)
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continue;
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else
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err(1, "Failed to open the fifo in read mode");
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}
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/* Read mode is opened */
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break;
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}
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nanosleep(&ts, NULL);
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if (verbose) {
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printf("Was sleeping...\n");
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fflush(stdout);
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}
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for (;;) {
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rv = read(fd, buf, buf_size);
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if (rv == -1) {
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warn("Failed to read");
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if (errno == EINTR) {
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if (verbose) {
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printf("Parent interrupted, "
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"continuing...\n");
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fflush(stdout);
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}
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continue;
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}
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break;
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}
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if (rv == 0) {
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if (verbose) {
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printf("Writers have closed, looks like we "
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"are done\n");
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fflush(stdout);
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}
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break;
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}
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if (verbose) {
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printf("Received %zd bytes message '%s'\n", rv, buf);
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fflush(stdout);
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}
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}
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close(fd);
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if (verbose) {
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printf("We are done.. now reap the child");
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fflush(stdout);
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}
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// Read the child...
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while (waitpid(pid, &status, 0) == -1)
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if (errno != EINTR) {
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warn("Failed to reap the child");
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return 1;
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}
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if (verbose) {
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printf("We are done completely\n");
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fflush(stdout);
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}
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return 0;
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}
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#ifndef STANDALONE
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ATF_TC(parent_child);
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ATF_TC_HEAD(parent_child, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Checks that when a fifo is shared "
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"between a reader parent and a writer child, that read will "
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"return EOF, and not get stuck after the child exits");
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}
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ATF_TC_BODY(parent_child, tc)
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{
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ATF_REQUIRE(run() == 0);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, parent_child);
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return atf_no_error();
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}
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#else
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int
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main(void)
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{
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verbose = 1;
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return run();
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}
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#endif
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