[PATCH] blkparse: change output buffering

If logging to stdout, only use a per-line buffer instead of fully buffered.

diff --git a/blkparse.c b/blkparse.c
index a44f3b91631ae220e3eff2e25871d167b9728589..2b5ae680faa6b780a8a275cd3c200fc639579227 100644 (file)
--- a/blkparse.c
+++ b/blkparse.c
@@ -885,7 +885,7 @@ static void usage(char *prog)
 int main(int argc, char *argv[])
 {
        char *ofp_buffer;
-       int c, ret;
+       int c, ret, mode;
 
        while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
                switch (c) {
@@ -922,13 +922,15 @@ int main(int argc, char *argv[])
 
        setlocale(LC_NUMERIC, "en_US");
 
-       if (!output_name)
+       if (!output_name) {
                ofp = fdopen(STDOUT_FILENO, "w");
-       else {
+               mode = _IOLBF;
+       } else {
                char ofname[128];
 
                snprintf(ofname, sizeof(ofname) - 1, "%s.log", output_name);
                ofp = fopen(ofname, "w");
+               mode = _IOFBF;
        }
 
        if (!ofp) {
@@ -937,7 +939,7 @@ int main(int argc, char *argv[])
        }
 
        ofp_buffer = malloc(4096);      
-       if (setvbuf(ofp, ofp_buffer, _IOFBF, 4096)) {
+       if (setvbuf(ofp, ofp_buffer, mode, 4096)) {
                perror("setvbuf");
                return 1;
        }