Auto-discover ftcat in st_trace

1 files changed, 28 insertions, 2 deletions

diff --git a/st_trace b/st_trace
index e9c1a9f..64bc3dd 100755
--- a/st_trace
+++ b/st_trace
@@ -1,5 +1,32 @@
 #!/bin/bash
 
+PATH_TO_SCRIPT=`dirname $0`
+function find_helper()
+{
+        IN_PATH=`which $1`
+        REL_TO_PATH="$PATH_TO_SCRIPT/$2"
+        if [ -z "$IN_PATH" ] && [ ! -z "$PATH_TO_SCRIPT" ] &&  [ -x "$PATH_TO_SCRIPT/$1" ]
+        then
+                echo "$PATH_TO_SCRIPT/$1"
+        elif [ -z "$IN_PATH" ] && [ ! -z "$PATH_TO_SCRIPT" ] &&  [ -x "$REL_TO_PATH/$1" ]
+        then
+            echo "$REL_TO_PATH/$1"
+        else
+                echo "$IN_PATH"
+        fi
+}
+
+function die()
+{
+        echo "Error: $*"
+        exit 1
+}
+
+
+[ -z "$FTCAT" ] && FTCAT=`find_helper ftcat ../ft_tools`
+[ -z "$FTCAT" ] && die "Can't find 'ftcat' utility."
+[ -z "$FTDEV" ] && FTDEV=/dev/litmus/sched_trace
+
 if [ "$1" == "-s" ]
 then
   AUTO=1
@@ -21,8 +48,7 @@ on_finish()
 # register shutdown signal handler
 trap 'on_finish' SIGUSR1
 
-[ -z "$FTCAT" ] && FTCAT=ftcat
-[ -z "$FTDEV" ] && FTDEV=/dev/litmus/sched_trace
+
 
 # Setup up sched_trace tracing.