Initial Spring 2016 commit.

userland/testbin/rmtest/Makefile

@@ -0,0 +1,11 @@
+# Makefile for rmtest
+
+TOP=../../..
+.include "$(TOP)/mk/os161.config.mk"
+
+PROG=rmtest
+SRCS=rmtest.c
+BINDIR=/testbin
+
+.include "$(TOP)/mk/os161.prog.mk"
+

userland/testbin/rmtest/rmtest.c

@@ -0,0 +1,163 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * 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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY 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 UNIVERSITY 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.
+ */
+
+/*
+ * rmtest.c
+ *
+ * 	Tests file system synchronization by deleting an open file and
+ * 	then attempting to read it.
+ *
+ * This should run correctly when the file system assignment is complete.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <err.h>
+
+#define TEST        "rmdata"
+#define TESTDATA    "I wish I was a headlight. -- Jerry Garcia"
+#define TESTLEN     (sizeof(TESTDATA)-1)
+
+static
+void
+dorm(int fd)
+{
+	/*
+	 * This used to spawn a copy of /bin/rm, but that's silly.
+	 * However, we will do the remove() from a subprocess, so
+	 * that various kinds of improper hacks to make this test
+	 * run won't work.
+	 *
+	 * Close the file in the subprocess, for similar reasons.
+	 */
+
+	pid_t pid;
+	int status;
+
+	pid = fork();
+	if (pid<0) {
+		err(1, "fork");
+	}
+	if (pid==0) {
+		/* child process */
+		close(fd);
+		if (remove(TEST)) {
+			err(1, "%s: remove", TEST);
+		}
+		_exit(0);
+	}
+	/* parent process */
+	if (waitpid(pid, &status, 0)<0) {
+		err(1, "waitpid");
+	}
+	else if (WIFSIGNALED(status)) {
+		warn("child process exited with signal %d", WTERMSIG(status));
+	}
+	else if (WEXITSTATUS(status) != 0) {
+		warnx("child process exited with code %d",WEXITSTATUS(status));
+	}
+}
+
+static
+int
+same(const char *a, const char *b, int len)
+{
+	while (len-- > 0) {
+		if (*a++ != *b++) return 0;
+	}
+	return 1;
+}
+
+int
+main(void)
+{
+	int file, len;
+	char buf[TESTLEN];
+
+	/* create test data file */
+	file = open(TEST, O_WRONLY | O_CREAT | O_TRUNC, 0664);
+	write(file, TESTDATA, TESTLEN);
+	close(file);
+
+	/* make sure the data is there */
+	file = open(TEST, O_RDONLY);
+	len = read(file, buf, TESTLEN);
+	if (len < 0) {
+		warn("read: before deletion");
+	}
+	else if (len < (int)TESTLEN) {
+		warnx("read: before deletion: short count %d", len);
+	}
+	if (!same(buf, TESTDATA, TESTLEN)) {
+		errx(1, "Failed: data read back was not the same");
+	}
+
+	/* rewind the file */
+	if (lseek(file, 0, SEEK_SET)) {
+		err(1, "lseek");
+	}
+
+	/* now spawn our killer and wait for it to do its work */
+	dorm(file);
+
+	/* we should be still able to read the data */
+	memset(buf, '\0', TESTLEN);
+	len = read(file, buf, TESTLEN);
+	if (len < 0) {
+		warn("read: after deletion");
+	}
+	else if (len < (int)TESTLEN) {
+		warnx("read: after deletion: short count %d", len);
+	}
+
+	if (!same(buf, TESTDATA, TESTLEN)) {
+		errx(1, "Failed: data read after deletion was not the same");
+	}
+
+	/* ok, close the file and it should go away */
+	close(file);
+
+	/* try to open it again */
+	file = open(TEST, O_RDONLY);
+	if (file >= 0) {
+		close(file);
+		errx(1, "Failed: the file could still be opened");
+	}
+
+	if (errno!=ENOENT) {
+		err(1, "Unexpected error reopening the file");
+	}
+
+	printf("Succeeded!\n");
+
+	return 0;
+}