Use unbuffered I/O when writing to stdout and make sure we write

the entire buffer.

diff --git a/sudoreplay.c b/sudoreplay.c
index 60d377b23f59d9ef7f4c3a196e56efa9f577f95f..976cd7842119d97252b60e785f915ac764c42e99 100644 (file)
--- a/sudoreplay.c
+++ b/sudoreplay.c
@@ -187,6 +187,7 @@ main(argc, argv)
     double seconds;
     unsigned long nbytes;
     size_t len, nread;
+    ssize_t nwritten;
     double speed = 1.0;
     double max_wait = 0;
     double to_wait;
@@ -271,6 +272,7 @@ main(argc, argv)
     /*
      * Timing file consists of line of the format: "%f %d\n"
      */
+    fflush(stdout);
     while (fgets(buf, sizeof(buf), tfile) != NULL) {
        errno = 0;
        seconds = strtod(buf, &ep);
@@ -289,16 +291,20 @@ main(argc, argv)
            to_wait = max_wait;
        delay(to_wait);
 
-       fflush(stdout);
        while (nbytes != 0) {
            if (nbytes > sizeof(buf))
                len = sizeof(buf);
            else
                len = nbytes;
-           /* XXX - read/write all of len */
            nread = fread(buf, 1, len, sfile);
-           fwrite(buf, nread, 1, stdout);
            nbytes -= nread;
+           do {
+               /* no stdio, must be unbuffered */
+               nwritten = write(STDOUT_FILENO, buf, nread);
+               if (nwritten == -1)
+                   error(1, "writing to standard output");
+               nread -= nwritten;
+           } while (nread);
        }
     }
     exit(0);