X-Git-Url: https://git.decadent.org.uk/gitweb/?p=nfs-utils.git;a=blobdiff_plain;f=support%2Fnfs%2Fcacheio.c;fp=support%2Fnfs%2Fcacheio.c;h=9d271cd4733d77328a6f2b3e5ec8a80b5da8a73b;hp=a76915bcf22992129efe3c1df9a25f83d44bfd70;hb=dd087896285da9e160e13ee9f7d75381b67895e3;hpb=525b122699b1b899815a76630ae2ee2feb551fe4

diff --git a/support/nfs/cacheio.c b/support/nfs/cacheio.c
index a76915b..9d271cd 100644
--- a/support/nfs/cacheio.c
+++ b/support/nfs/cacheio.c
@@ -17,6 +17,7 @@
 
 #include <nfslib.h>
 #include <stdio.h>
+#include <stdio_ext.h>
 #include <ctype.h>
 #include <unistd.h>
 #include <sys/types.h>
@@ -111,7 +112,18 @@ void qword_printint(FILE *f, int num)
 
 int qword_eol(FILE *f)
 {
+	int err;
+
 	fprintf(f,"\n");
+	err = fflush(f);
+	/*
+	 * We must send one line (and one line only) in a single write
+	 * call.  In case of a write error, libc may accumulate the
+	 * unwritten data and try to write it again later, resulting in a
+	 * multi-line write.  So we must explicitly ask it to throw away
+	 * any such cached data:
+	 */
+	__fpurge(f);
 	return fflush(f);
 }