LCA2011 version

[tridge/junkcode.git] / writefiles.c

diff --git a/writefiles.c b/writefiles.c
index e9f0e89c0bdbeb0123f3f4ee288a0cba52d3fd9c..8eb580828ef7e0cf698026f2d4f21a753e64aff0 100644 (file)
--- a/writefiles.c
+++ b/writefiles.c
@@ -3,11 +3,13 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <time.h>
 #include <sys/time.h>
 
 
 static struct timeval tp1,tp2;
 static size_t block_size = 64 * 1024;
+static int osync;
 
 static void start_timer()
 {
@@ -32,11 +34,11 @@ static void write_file(char *fname)
        buf = malloc(block_size);
 
        if (!buf) {
-               printf("Malloc of %d failed\n", block_size);
+               printf("Malloc of %d failed\n", (int)block_size);
                exit(1);
        }
 
-       fd = open(fname, O_WRONLY|O_SYNC);
+       fd = open(fname, O_WRONLY|(osync?O_SYNC:0));
        if (fd == -1) {
                perror(fname);
                free(buf);
@@ -64,17 +66,18 @@ static void write_file(char *fname)
 
 static void usage(void)
 {
-       printf("
-writefiles - writes to a list of files, showing throughput
-
-Usage: writefiles [options] <files>
-
-Options:
-    -B size        set the block size in bytes
-
-WARNING: writefiles is a destructive test!
-
-");
+       printf("\n" \
+"writefiles - writes to a list of files, showing throughput\n" \
+"\n" \
+"Usage: writefiles [options] <files>\n" \
+"\n" \
+"Options:\n" \
+"    -B size        set the block size in bytes\n" \
+"    -s             sync open\n" \
+"\n" \
+"WARNING: writefiles is a destructive test!\n" \
+"\n" \
+"");
 }
 
 
@@ -85,11 +88,14 @@ int main(int argc, char *argv[])
        extern int optind;
        int c;
 
-       while ((c = getopt(argc, argv, "B:h")) != -1) {
+       while ((c = getopt(argc, argv, "B:hs")) != -1) {
                switch (c) {
                case 'B':
                        block_size = strtol(optarg, NULL, 0);
                        break;
+               case 's':
+                       osync = 1;
+                       break;
                case 'h':
                default:
                        usage();