backtrace: diverge

1 files changed, 17 insertions, 1 deletions

diff --git a/bin/backtrace b/bin/backtrace
index f8582ec2f..15d60a9b4 100755
--- a/bin/backtrace
+++ b/bin/backtrace
@@ -1,10 +1,12 @@
 #! /bin/sh
 set -euf
 
+exec >&2
+
 pid=$$
 while :; do
   cd /proc/$pid
-  cmdline=$(cat cmdline | sed 's/\0/ /g;s/ $//')
+  cmdline=$(cat cmdline | tr '\0' ' ' | sed 's/ $//')
   ppid=$(grep PPid status | awk '{print$2}')
   printf '%5d %s\n' $pid "$cmdline"
   if [ $pid = 1 ]; then
@@ -13,4 +15,18 @@ while :; do
     pid=$ppid
   fi
 done \
+  | sed \
+      "$(printf '
+          s:\(/bin/sh \)%s/\([^ ]\+\):\e[32m\\2\e[m:g
+          s:%s/\([^ ]\+\):\e[32;1m\\1\e[m:g
+        ' \
+          "$(dirname "$0" | bre-escape | sed 's/:/\\:/g')" \
+          "$(dirname "$0" | bre-escape | sed 's/:/\\:/g')" \
+      )" \
   | tac
+
+ps='Press ^C to abort: '
+while :; do
+  printf '\e[K\e[31;1m%s\e[m' "$ps"
+  read -r _input
+done