Add -u for unbuffered output.

git-svn-id: http://www.varnish-cache.org/svn/trunk@3104 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishlog/varnishlog.1

@@ -50,6 +50,7 @@
 .Op Fl P Ar file
 .Op Fl r Ar file
 .Op Fl s Ar num
+.Op Fl u 
 .Op Fl V
 .Op Fl w Ar file
 .Op Fl X Ar regex
@@ -136,6 +137,8 @@ instead of shared memory.
 Skip the first
 .Ar num
 log records.
+.It Fl u
+Unbuffered output.
 .It Fl V
 Display the version number and exit.
 .It Fl w Ar file

bin/varnishlog/varnishlog.c

@@ -317,7 +317,7 @@ int
 main(int argc, char **argv)
 {
 	int c;
-	int a_flag = 0, D_flag = 0, o_flag = 0;
+	int a_flag = 0, D_flag = 0, o_flag = 0, u_flag = 0;
 	const char *n_arg = NULL;
 	const char *P_arg = NULL;
 	const char *w_arg = NULL;
@@ -326,7 +326,7 @@ main(int argc, char **argv)
 
 	vd = VSL_New();
 
-	while ((c = getopt(argc, argv, VSL_ARGS "aDon:P:Vw:")) != -1) {
+	while ((c = getopt(argc, argv, VSL_ARGS "aDon:P:uVw:")) != -1) {
 		switch (c) {
 		case 'a':
 			a_flag = 1;
@@ -351,6 +351,9 @@ main(int argc, char **argv)
 		case 'P':
 			P_arg = optarg;
 			break;
+		case 'u':
+			u_flag = 1;
+			break;
 		case 'V':
 			varnish_version("varnishlog");
 			exit(0);
@@ -391,6 +394,9 @@ main(int argc, char **argv)
 	if (o_flag)
 		do_order(vd, argc - optind, argv + optind);
 
+	if (u_flag)
+		setbuf(stdout, NULL);
+
 	while (VSL_Dispatch(vd, VSL_H_Print, stdout) >= 0) {
 		if (fflush(stdout) != 0) {
 			perror("stdout");