2 files changed, 72 insertions, 0 deletions

diff --git a/src/regress/lib/libc/stdio_threading/fwrite/Makefile b/src/regress/lib/libc/stdio_threading/fwrite/Makefile
new file mode 100644
index 0000000000..e79899c475
--- /dev/null
+++ b/src/regress/lib/libc/stdio_threading/fwrite/Makefile
@@ -0,0 +1,6 @@
+TOPDIR=${.CURDIR}
+PROG=fwrite_test
+CFLAGS+=-I${TOPDIR}/../include/
+LDFLAGS+=-lpthread
+
+.include <bsd.regress.mk>
diff --git a/src/regress/lib/libc/stdio_threading/fwrite/fwrite_test.c b/src/regress/lib/libc/stdio_threading/fwrite/fwrite_test.c
new file mode 100755
index 0000000000..39bfb51ef0
--- /dev/null
+++ b/src/regress/lib/libc/stdio_threading/fwrite/fwrite_test.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2008 Bret S. Lambert <blambert@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "local.h"
+
+void
+fwrite_thread(void *v)
+{
+        FILE *file = v;
+        int i;
+
+        for (i = 0; i < 4096; i++) {
+                if (fwrite(TEXT, sizeof(char), strlen(TEXT), file) == 0) {
+
+                        if (feof(file))
+                                break;
+
+                        printf("OMG!!!\n");
+                        fflush(stdout);
+                        break;
+                }
+        }
+}
+
+int
+main(void)
+{
+        char sfn[24];
+        char buf[sizeof(TEXT)];
+        FILE *sfp;
+        int fd, i;
+
+        strlcpy(sfn, "/tmp/barnacles.XXXXXXXX", sizeof(sfn));
+        if ((fd = mkstemp(sfn)) == -1 ||
+            (sfp = fdopen(fd, "w+")) == NULL) {
+                if (fd != -1) {
+                        unlink(sfn);
+                        close(fd);
+                }
+                err(1, "could not open temporary file");
+        }
+
+        run_threads(fwrite_thread, sfp);
+
+        while (fread(buf, sizeof(char), strlen(TEXT), sfp))     /* verify */
+                if (strncmp(buf, TEXT, sizeof(TEXT)))
+                        err(1, "Thread writes were not atomic!!!");
+
+        unlink(sfn);
+        close(fd);
+
+        exit(0);
+}