initial code repo

[stor4nfv.git] / src / ceph / qa / workunits / fs / test_o_trunc.c

diff --git a/src/ceph/qa/workunits/fs/test_o_trunc.c b/src/ceph/qa/workunits/fs/test_o_trunc.c
new file mode 100644 (file)
index 0000000..1ce19e4
--- /dev/null
+++ b/src/ceph/qa/workunits/fs/test_o_trunc.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+       char obuf[32], ibuf[1024];
+       int n, max = 0;
+       
+       if (argc > 2)
+               max = atoi(argv[2]);
+       if (!max)
+               max = 600;
+       
+       memset(obuf, 0xff, sizeof(obuf));
+       
+       for (n = 1; n <= max; ++n) {
+               int fd, ret;
+               fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC, 0644);
+               printf("%d/%d: open fd = %d\n", n, max, fd);
+               
+               ret = write(fd, obuf, sizeof(obuf));
+               printf("write ret = %d\n", ret);
+               
+               sleep(1);
+               
+               ret = write(fd, obuf, sizeof(obuf));
+               printf("write ret = %d\n", ret);
+               
+               ret = pread(fd, ibuf, sizeof(ibuf), 0);
+               printf("pread ret = %d\n", ret);
+               
+               if (memcmp(obuf, ibuf, sizeof(obuf))) {
+                       printf("mismatch\n");
+                       close(fd);
+                       break;
+               }
+               close(fd);
+       }
+       return 0;
+}