1 files changed, 18 insertions, 1 deletions

diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 44889c9b5630..43f19c1fed3a 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -51,6 +51,7 @@ static int long_size;
 static unsigned long    page_size;
 
 static ssize_t calc_data_size;
+static bool repipe;
 
 static int do_read(int fd, void *buf, int size)
 {
@@ -62,6 +63,13 @@ static int do_read(int fd, void *buf, int size)
                 if (ret <= 0)
                         return -1;
 
+                if (repipe) {
+                        int retw = write(STDOUT_FILENO, buf, ret);
+
+                        if (retw <= 0 || retw != ret)
+                                die("repiping input file");
+                }
+
                 size -= ret;
                 buf += ret;
         }
@@ -116,6 +124,13 @@ static char *read_string(void)
                 if (!r)
                         die("no data");
 
+                if (repipe) {
+                        int retw = write(STDOUT_FILENO, &c, 1);
+
+                        if (retw <= 0 || retw != r)
+                                die("repiping input file string");
+                }
+
                 buf[size++] = c;
 
                 if (!c)
@@ -454,7 +469,7 @@ struct record *trace_read_data(int cpu)
         return data;
 }
 
-ssize_t trace_report(int fd)
+ssize_t trace_report(int fd, bool __repipe)
 {
         char buf[BUFSIZ];
         char test[] = { 23, 8, 68 };
@@ -465,6 +480,7 @@ ssize_t trace_report(int fd)
         ssize_t size;
 
         calc_data_size = 1;
+        repipe = __repipe;
 
         input_fd = fd;
 
@@ -499,6 +515,7 @@ ssize_t trace_report(int fd)
 
         size = calc_data_size - 1;
         calc_data_size = 0;
+        repipe = false;
 
         if (show_funcs) {
                 print_funcs();