From 644aae432d9bcc962bb27546f5838c34949a08db Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Thu, 23 Oct 2014 14:12:45 +1300
Subject: Show nice level of current process if /proc

---
 bash/bashrc.d/prompt.bash | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

(limited to 'bash')

diff --git a/bash/bashrc.d/prompt.bash b/bash/bashrc.d/prompt.bash
index b9a834b8..d6a2f65a 100644
--- a/bash/bashrc.d/prompt.bash
+++ b/bash/bashrc.d/prompt.bash
@@ -14,7 +14,7 @@ prompt() {
         on)
             # Set up pre-prompt command and prompt format
             PROMPT_COMMAND='declare -i PROMPT_RETURN=$? ; history -a'
-            PS1='[\u@\h:\w]$(prompt vcs)$(prompt job)$(prompt ret)\$'
+            PS1='[\u@\h:\w]$(prompt nice)$(prompt job)$(prompt vcs)$(prompt ret)\$'
 
             # If Bash 4.0 is available, trim very long paths in prompt
             if ((BASH_VERSINFO[0] >= 4)) ; then
@@ -243,6 +243,19 @@ prompt() {
                 printf '{%d}' "$jobc"
             fi
             ;;
+
+        # Show the nice level of the current process with a circumflex (/proc
+        # systems only)
+        nice)
+            if [[ -r /proc/"$$"/stat ]] ; then
+                read -r _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ nice _ \
+                    < /proc/"$$"/stat
+                if ((nice != 20)) ; then
+                    printf '^%d' "$((nice - 20))"
+                fi
+            fi
+            ;;
+
         # Print error
         *)
             printf '%s: Unknown command %s\n' "$FUNCNAME" "$1" >&2
@@ -251,7 +264,7 @@ prompt() {
 }
 
 # Complete words
-complete -W 'on off git hg svn vcs ret job' prompt
+complete -W 'on off git hg svn vcs ret job nice' prompt
 
 # Start with full-fledged prompt
 prompt on
-- 
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