From edeaee142925c32c10e61b2da38b43d2dee92d15 Mon Sep 17 00:00:00 2001
From: Ian Kelling <iank@fsf.org>
Date: Sat, 14 Feb 2026 07:03:31 -0500
Subject: [PATCH] add func for just reporting errors, eg for a best-effort
 service

---
 bash-bear | 104 +++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 68 insertions(+), 36 deletions(-)

diff --git a/bash-bear b/bash-bear
index 611d604..9c3ead1 100644
--- a/bash-bear
+++ b/bash-bear
@@ -161,7 +161,7 @@ err-allow() {
 }
 
 #######################################
-# err-exit: Print stack trace and exit
+# err-exit: Print last command info, stack trace, then exit
 #
 # Use this instead of the exit command to be more informative.
 #
@@ -183,11 +183,8 @@ err-exit() {
 
   # This has to come before most things or vars get changed
   local _msg="${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $_err"
-  local _cmdr="$BASH_COMMAND" # command right. we chop of the left, keep the right.
+  local _cmdr="$BASH_COMMAND" # command right. we chop off the left, keep the right.
 
-  if [[ -v _pipestatus && $_pipestatus && $_pipestatus != "$_err" ]]; then
-    _msg+=", PIPESTATUS: $_pipestatus"
-  fi
   set +x
   if [[ $# -ge 1 && $1 == -* ]]; then
     _err="${1#-}"
@@ -199,38 +196,8 @@ err-exit() {
     _msg="$1"
   fi
 
-  ## Begin printing vars from within BASH_COMMAND ##
-  local _var _chars _l
-  local -A _vars
-  while [[ $_cmdr ]]; do
-    _chars="${#_cmdr}"
-    _cmdr="${_cmdr#*$}"
-    _cmdr="${_cmdr#{}"
-    if (( _chars == ${#_cmdr} )); then
-      break
-    fi
-    _var="${_cmdr%%[^a-zA-Z0-9_]*}"
-    if [[ ! $_var || $_var == [0-9]* ]]; then
-      continue
-    fi
-    _vars[${_var}]=t
-  done
-  #echo "iank ${_vars[*]}"
-  #set |& grep ^password
-  # in my small test, this took 50% longer than piping to grep.
-  # That seems a small enough penalty to stay in bash here.
-  if (( ${#_vars[@]} )); then
-    set |& while read -r _l; do
-             for _var in "${!_vars[@]}"; do
-               case $_l in
-                 ${_var}=*) printf "%s\n" "$_l" >&2 ;;
-               esac
-             done
-           done
-  fi
-  ## End printing vars from within BASH_COMMAND ##
+  _err-bash-print-command-info
 
-  printf "%s\n" "$_msg" >&2
   err-bash-trace 2
   set -e # err trap does not work within an error trap
 
@@ -242,6 +209,27 @@ err-exit() {
   exit $_err
 }
 
+#######################################
+# err-info: Print last command info & stack trace
+#
+# Like err-exit but without the exit.
+#
+# usage: After sourcing this file, trap err-info ERR
+#
+#######################################
+err-info() {
+  local _err=$? _pipestatus="${PIPESTATUS[*]}"
+
+  # note: duplicated in err-exit
+  local _msg="${BASH_SOURCE[1]}:${BASH_LINENO[0]}: \`$BASH_COMMAND' returned $_err"
+  local _cmdr="$BASH_COMMAND"
+
+  set +x
+  _err-bash-print-command-info
+  err-bash-trace 2
+
+}
+
 #######################################
 # Print stack trace
 #
@@ -285,6 +273,50 @@ err-bash-trace() {
   return 0
 }
 
+#######################################
+# Internal function for err-exit & err-info.
+#
+# Usage: see calling functions
+#######################################
+_err-bash-print-command-info() {
+  if [[ -v _pipestatus && $_pipestatus && $_pipestatus != "$_err" ]]; then
+    _msg+=", PIPESTATUS: $_pipestatus"
+  fi
+
+  ## Begin printing vars from within BASH_COMMAND ##
+  local _var _chars _l
+  local -A _vars
+  while [[ $_cmdr ]]; do
+    _chars="${#_cmdr}"
+    _cmdr="${_cmdr#*$}"
+    _cmdr="${_cmdr#{}"
+    if (( _chars == ${#_cmdr} )); then
+      break
+    fi
+    _var="${_cmdr%%[^a-zA-Z0-9_]*}"
+    if [[ ! $_var || $_var == [0-9]* ]]; then
+      continue
+    fi
+    _vars[${_var}]=t
+  done
+  #echo "iank ${_vars[*]}"
+  #set |& grep ^password
+  # in my small test, this took 50% longer than piping to grep.
+  # That seems a small enough penalty to stay in bash here.
+  if (( ${#_vars[@]} )); then
+    set |& while read -r _l; do
+             for _var in "${!_vars[@]}"; do
+               case $_l in
+                 ${_var}=*) printf "%s\n" "$_l" >&2 ;;
+               esac
+             done
+           done
+  fi
+  ## End printing vars from within BASH_COMMAND ##
+
+  printf "%s\n" "$_msg" >&2
+}
+
 #######################################
 # Internal function for err-catch. Prints stack trace from interactive
 # shell trap.
-- 
2.25.1