From fd2b6fd3bbe4919a1d4560e788fc66db742c0c6d Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Wed, 5 Jul 2017 12:38:39 +1200
Subject: Escape backslashes in command prompt output

To stop them getting interpreted as \h, \w etc. None of these *should*
be able to emit backslashes (it's an illegal branch name), but best to
be thorough.
---
 bash/bashrc.d/prompt.bash | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/bash/bashrc.d/prompt.bash b/bash/bashrc.d/prompt.bash
index 782af287..a6506a60 100644
--- a/bash/bashrc.d/prompt.bash
+++ b/bash/bashrc.d/prompt.bash
@@ -167,7 +167,10 @@ prompt() {
             # Print the status in brackets; add a git: prefix only if there
             # might be another VCS prompt (because PROMPT_VCS is set)
             printf '(%s%s%s%s)' \
-                "${PROMPT_VCS:+git:}" "$name" "${proc:+:"$proc"}" "$state"
+                "${PROMPT_VCS:+git:}" \
+                "${name//\\/\\\\}" \
+                "${proc:+:"${proc//\\/\\\\}"}" \
+                "${state//\\/\\\\}"
             ;;
 
         # Subversion prompt function
@@ -193,6 +196,7 @@ prompt() {
             branch=${branch#/}
             branch=${branch#branches/}
             branch=${branch%%/*}
+            [[ -n $branch ]] || branch=unknown
 
             # Parse the output of svn status to determine working copy state
             local symbol
@@ -210,7 +214,9 @@ prompt() {
             ((untracked)) && state=${state}'?'
 
             # Print the state in brackets with an svn: prefix
-            printf '(svn:%s%s)' "${branch:-unknown}" "$state"
+            printf '(svn:%s%s)' \
+                "${branch//\\/\\\\}" \
+                "${state//\\/\\\\}"
             ;;
 
         # VCS wrapper prompt function; print the first relevant prompt, if any
@@ -224,7 +230,7 @@ prompt() {
         # Show return status of previous command in angle brackets, if not zero
         ret)
             # shellcheck disable=SC2154
-            ((ret)) && printf '<%u>' "$ret"
+            ((ret)) && printf '<%u>' "${ret//\\/\\\\}"
             ;;
 
         # Show the count of background jobs in curly brackets, if not zero
@@ -233,7 +239,7 @@ prompt() {
             while read -r ; do
                 ((jobc++))
             done < <(jobs -p)
-            ((jobc)) && printf '{%u}' "$jobc"
+            ((jobc)) && printf '{%u}' "${jobc//\\/\\\\}"
             ;;
 
         # No argument given, print prompt strings and vars
-- 
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