X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ftests%2Fwriteme.c;h=0c9eaf23a32f8bff070c3ebc07eb4e0910ab7759;hb=f7392c7c4a16bc1127ee448f937ba81c50dcdfd5;hp=bf5c971e611815bc8a6ee2baa2ee1169397a5d06;hpb=0343ecb7de2dae4cf8016416bf1af5d34e9a746d;p=fs%2Flustre-release.git

diff --git a/lustre/tests/writeme.c b/lustre/tests/writeme.c
index bf5c971..0c9eaf2 100644
--- a/lustre/tests/writeme.c
+++ b/lustre/tests/writeme.c
@@ -1,46 +1,103 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ */
+
 #include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <stdbool.h>
 
 void usage(char *prog)
 {
-        printf("usage: %s [-s] filename\n", prog);
+	printf("usage: %s [-s] [-b <bytes>] filename\n", prog);
+	exit(1);
 }
 
 int main(int argc, char **argv)
 {
-        int fd, rc;
-	int do_sync = 0;
-        int i = 0;
-	int file_arg = 1;
-        char buf[4096];
+	bool limit_write = false, do_sync = false;
+	int c, per_write, fd, rc;
+	unsigned long bytes = 0;
+	char buf[4096];
+	char *endptr = NULL;
 
-        memset(buf, 0, 4096);
+	while ((c = getopt(argc, argv, "sb:")) != -1) {
+		switch (c) {
+		case 's':
+			do_sync = true;
+			break;
+		case 'b':
+			limit_write = true;
+			bytes = strtoul(optarg, &endptr, 10);
+			if (endptr != NULL && *endptr != '\0')
+				usage(argv[0]);
+			break;
+		default:
+			usage(argv[0]);
+			break;
+		}
+	}
 
-        if (argc < 2 || argc > 3) {
+	if (argc - optind != 1)
 		usage(argv[0]);
-                exit(1);
-        }
-
-        if (strcmp(argv[1], "-s") == 0) {
-                do_sync = 1;
-		file_arg++;
-        }
-
-        fd = open(argv[file_arg], O_RDWR | O_CREAT, 0600);
-        if (fd == -1) {
-                printf("Error opening %s\n", argv[1]);
-                exit(1);
-        }
-
-        while (1) {
-                sprintf(buf, "write %d\n", i);
-                rc = write(fd, buf, sizeof(buf));
+
+	memset(buf, 0, 4096);
+	fd = open(argv[optind], O_RDWR | O_CREAT, 0600);
+	if (fd == -1) {
+		printf("Error opening %s\n", argv[1]);
+		exit(1);
+	}
+
+	/* Even 0 bytes, write at least once */
+	if (limit_write) {
+		do {
+			per_write = bytes > 4096 ? 4096 : bytes;
+			rc = write(fd, buf, per_write);
+			if (rc > 0)
+				bytes -= rc;
+			else if (rc < 0)
+				break;
+		} while (bytes > 0);
+
+		return rc >= 0 ? 0 : rc;
+	}
+
+	for (rc = 0; ;) {
+		sprintf(buf, "write %d\n", rc);
+		rc = write(fd, buf, sizeof(buf));
 		if (do_sync)
 			sync();
-                sleep(1);
-        }
-        return 0;
+		sleep(1);
+	}
+
+	return 0;
 }