Add fifo_misc, a regression test to hold misc. functional tests for fifos

that don't obviously fit into create, open, and io.  For now, add only a
regression test to make sure that lseek() fails with ESPIPE (which it
doesn't).

tools/regression/fifo/fifo_misc/Makefile

@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+PROG=	fifo_misc
+NO_MAN=
+WARNS=	3
+
+.include <bsd.prog.mk>

tools/regression/fifo/fifo_misc/fifo_misc.c

@@ -0,0 +1,140 @@
+/*-
+ * Copyright (c) 2005 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/stat.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Regression test for piddling details of fifos.
+ */
+
+/*
+ * All activity occurs within a temporary directory created early in the
+ * test.
+ */
+char	temp_dir[PATH_MAX];
+
+static void __unused
+atexit_temp_dir(void)
+{
+
+	rmdir(temp_dir);
+}
+
+static void
+makefifo(const char *fifoname, const char *testname)
+{
+
+	if (mkfifo(fifoname, 0700) < 0)
+		err(-1, "%s: makefifo: mkfifo: %s", testname, fifoname);
+}
+
+static void
+cleanfifo(const char *fifoname, int fd1, int fd2)
+{
+
+	if (fd1 != -1)
+		close(fd1);
+	if (fd2 != -1)
+		close(fd2);
+	(void)unlink(fifoname);
+}
+
+static int
+openfifo(const char *fifoname, const char *testname, int *reader_fdp,
+    int *writer_fdp)
+{
+	int error, fd1, fd2;
+
+	fd1 = open(fifoname, O_RDONLY | O_NONBLOCK);
+	if (fd1 < 0)
+		return (-1);
+	fd2 = open(fifoname, O_WRONLY | O_NONBLOCK);
+	if (fd2 < 0) {
+		error = errno;
+		close(fd1);
+		errno = error;
+		return (-1);
+	}
+	*reader_fdp = fd1;
+	*writer_fdp = fd2;
+
+	return (0);
+}
+
+static void
+test_lseek(void)
+{
+	int reader_fd, writer_fd;
+
+	makefifo("testfifo", __func__);
+
+	if (openfifo("testfifo", __func__, &reader_fd, &writer_fd) < 0) {
+		warn("%s: openfifo", __func__);
+		cleanfifo("testfifo", -1, -1);
+		exit(-1);
+	}
+
+	if (lseek(reader_fd, SEEK_CUR, 1) >= 0) {
+		warnx("%s: lseek succeeded instead of returning ESPIPE",
+		    __func__);
+		cleanfifo("testfifo", reader_fd, writer_fd);
+		exit(-1);
+	}
+	if (errno != ESPIPE) {
+		warn("%s: lseek returned instead of ESPIPE", __func__);
+		cleanfifo("testfifo", reader_fd, writer_fd);
+		exit(-1);
+	}
+
+	cleanfifo("testfifo", reader_fd, writer_fd);
+}
+
+int
+main(int argc, char *argv[])
+{
+
+	strcpy(temp_dir, "/tmp/fifo_misc.XXXXXXXXXXX");
+	if (mkdtemp(temp_dir) == NULL)
+		err(-1, "mkdtemp");
+	atexit(atexit_temp_dir);
+
+	if (chdir(temp_dir) < 0)
+		err(-1, "chdir %s", temp_dir);
+
+	test_lseek();
+
+	return (0);
+}